PRODUCT BUILDER

Serhii Lozovskyi

End-to-end product builder · from strategy and architecture to no-code, code and AI execution

6+
Years experience
70+
Projects
200+
Projects estimated
50+
People mentored
30
Team members mentored
About

Who I am

Hi there! I’m Serhii Lozovskyi. Currently, my professional journey goes. With a unique background spanning roles as a CTO, Bubble Developer, Estimate Manager, and Product Manager, I bring a 360-degree perspective to every project - leading them effectively from the initial spark to a successful launch.

In my capacity as a CTO, I’ve been responsible for overall technology strategies. This includes selecting and implementing new tech stacks, as well as ensuring the continuous maintenance and optimization of complex existing systems. I know how to build architectures that are designed to scale.

As a Product Manager, I take ownership of the product's vision. I work closely with stakeholders to gather requirements, build clear roadmaps, and manage the full development lifecycle. My experience as an Estimate Manager further allows me to provide highly accurate projections for timelines and budgets, ensuring transparency at every stage.

On the technical side, I have a deep-rooted expertise as a Bubble Developer. I build and maintain sophisticated web and mobile applications. Because I have a background in traditional coding—including HTML, CSS, JS, and NodeJS—I don’t just "assemble" apps. I know how to correctly configure data access parameters (Privacy Rules), build secure architectures, and integrate virtually any third-party service.

Beyond traditional and no-code development, I leverage AI-powered tools to dramatically accelerate delivery. Using Claude Code and other AI coding solutions, I rapidly build prototypes and working MVPs—turning concepts into validated products in a fraction of the usual time. I combine these AI-assisted workflows with my engineering background to ensure the output isn't just fast, but also clean, secure, and production-ready.

Throughout my career, I’ve mastered an extensive tech stack. This includes: No-code/Low-code platforms like Bubble, Webflow and others; Databases and Cloud solutions such as AWS, SQL, Notion and Airtable; Automation tools like Make, Zapier, and n8n. Development with Claude Code and other AI solutions.

I also have significant experience in AI implementations (specifically OpenAI), building Web3 and Blockchain solutions (like Hedera and Metamask), and setting up complex API integrations—ranging from payment gateways like Stripe to deep Telegram and Discord integrations... and many others.

Beyond product development, I also offer end-to-end AI content production services: image generation (Midjourney, FLUX, Leonardo AI, ComfyUI), consistent AI avatars and characters, video generation (Kling AI, Veo, Wan 2.2), AI music and voiceovers (Suno AI, ElevenLabs), and ready-to-publish social media content — from single posts to full monthly content packages. This lets me cover not just the technical build, but the entire visual and content layer of a product — from idea and script to the final ad creative or reel.

My core strength is the bridge I build between deep technical expertise and business-driven thinking. I’d love to discuss how my experience can help bring your next big idea to life.

Languages
UkrainianC2 — Native
EnglishB2+ — Upper-Intermediate
russianC2 — Fluent

Skills

Capabilities

Proficiency across the stack — rated 1 to 5.

No-code / Low-code

  • BubbleExpert (5/5)
  • Bubble API & PluginsExpert (5/5)
  • WebflowAdvanced (4/5)
  • FlutterFlowProficient (3/5)
  • WordPressProficient (3/5)
  • OpenCartProficient (3/5)

AI & Automation

  • Claude Code / AI-assisted devExpert (5/5)
  • OpenAI / LLM integrationAdvanced (4/5)
  • AI image / video generationAdvanced (4/5)
  • MakeExpert (5/5)
  • n8nExpert (5/5)
  • ZapierAdvanced (4/5)
  • KeragonAdvanced (4/5)
  • Model Context Protocol (MCP)Advanced (4/5)
  • Vector databases (Qdrant, Pinecone, pgvector)Advanced (4/5)
  • RAG frameworks (LangChain, LlamaIndex)Advanced (4/5)
  • Embeddings & semantic searchAdvanced (4/5)
  • Local LLMs (Ollama, LM Studio)Advanced (4/5)
  • OCR / document parsingProficient (3/5)

Engineering & Code

  • REST API integrationExpert (5/5)
  • HTML / CSS / JSExpert (5/5)
  • PythonAdvanced (4/5)
  • Node.jsProficient (3/5)
  • SQLProficient (3/5)
  • TypeScriptProficient (3/5)
  • Web scraping & data extractionProficient (3/5)

Cloud, Data & Integrations

  • StripeAdvanced (4/5)
  • SendGrid / PostmarkExpert (5/5)
  • AWSProficient (3/5)
  • AlgoliaAdvanced (4/5)
  • Airtable / NotionExpert (5/5)
  • Telegram / DiscordExpert (5/5)
  • Slack / WhatsApp / GmailAdvanced (4/5)
  • ShopifyProficient (3/5)
  • PDF generation (PDFMonkey)Advanced (4/5)
  • Video calling (Daily.co)Proficient (3/5)

Web3 & Blockchain

  • HederaProficient (3/5)
  • MetaMask / wallet connectProficient (3/5)
  • Hashing / on-chain integrityProficient (3/5)
  • VenlyWorking knowledge (2/5)

Product, Management & Mentorship

  • Project EstimationExpert (5/5)
  • Bubble mentoring (50+ trained)Expert (5/5)
  • Product ManagementExpert (5/5)
  • Project ManagementExpert (5/5)
  • Team LeadershipExpert (5/5)
  • Agile / Scrum / KanbanAdvanced (4/5)

Full capability stack: Bubble, Bubble API & Plugins, Webflow, FlutterFlow, WordPress, OpenCart, Claude Code / AI-assisted dev, OpenAI / LLM integration, AI image / video generation, Make, n8n, Zapier, Keragon, Model Context Protocol (MCP), Vector databases (Qdrant, Pinecone, pgvector), RAG frameworks (LangChain, LlamaIndex), Embeddings & semantic search, Local LLMs (Ollama, LM Studio), OCR / document parsing, REST API integration, HTML / CSS / JS, Python, Node.js, SQL, TypeScript, Web scraping & data extraction, Stripe, SendGrid / Postmark, AWS, Algolia, Airtable / Notion, Telegram / Discord, Slack / WhatsApp / Gmail, Shopify, PDF generation (PDFMonkey), Video calling (Daily.co), Hedera, MetaMask / wallet connect, Hashing / on-chain integrity, Venly, Project Estimation, Bubble mentoring (50+ trained), Product Management, Project Management, Team Leadership, Agile / Scrum / Kanban.


Work

Selected work

11 case studies from 70+ delivered projects.

Winery Management System

SaaS · Team Lead · Full Stack Developer · 5 months · 3

Winery Management System (WMS) is a platform for optimizing wine storage and sales processes, helping its users track wine inventory, create wine lists, and manage sales transactions.

Responsibilities
  • participated in all meetings
  • Bubble development
  • Creating a personal Bubble API
  • JS integration
  • Development of an analytics and reporting system
  • Development of a dynamic wine menu where, depending on 3 levels of filtration and 2 levels of sorting, the appearance and the ability to export PDF changes
  • Development of a system of locations in the middle of which different batches of different wines can be located
  • Development of an admin panel for regulating all the possibilities of the site, confirmation and modification of orders, changing the content of sites
  • Development of automatic generation of orders based on images using AI
  • Development of adaptive layout of the entire application
  • Privacy Rules are configured in detail
  • There are also many other functions that I have highlighted the most interesting and complex functions.
BubbleBubble APIAlgoliaApexChartsPDF MonkeyHTML / CSS / JSAPIREST API

Aroma Library

Healthcare / EdTech · Full Stack Developer · Tech Lead · V1 - 8 month V2 - 1 month, until now V3 - Not start · 8

Your Ultimate Learning Platform for Aromatherapy, for beginners and experts alike

Quickly find the right essential oils, formulations, and evidence-based insights to create personalized solutions for your clients - saving you time while ensuring safe, effective results.

Whether you’re new to aromatherapy or an experienced practitioner, project offers reliable information, research-based guidance, and a space to connect with like-minded enthusiasts worldwide.

How is project different from other aromatherapy resources?

Our platform is founded by clinical aromatherapists with 30+ years of experience. We focus on science-backed insights, ensuring safe and effective essential oil use for both personal and professional needs.

Responsibilities
  • participated in all meetings
  • Bubble development
  • Creating a personal Bubble API
  • JS integration
  • Move BD from Xano
  • Creating with bubble Complex Filters (Comparison: thing with thing, list with thing, thing with list, list with list, thing of number with list of ranges of numbers, thing of number with range of number)
  • Development of adaptive layout of the entire application
  • Connection Google analytics
  • Forming links by passes relative to the user's route through the pages
  • Localization of the entire site into two languages with the ability to add more languages
  • Upload oil analysis from xlxs file, where two fields are compound name and percentage of oil content. If such a compound already exists, a new one is not created
  • Develop a unit system that allows switching between different measurement systems and leaving the correct numbers in the selected measurement system relative to the one in which the recipe was created
  • A payment system has been developed that allows you to save all invested funds when changing your subscription up or down, when switching from annual to monthly and vice versa. Two types of payment by invoice through Zapier and by card through Stripe
  • Privacy Rules are configured in detail
  • Each subscription has its own permissions that can be configured from the bubble side. If a subscription does not have a permission but the user tries to get it, he is offered to upgrade the plan.
  • There are also many other functions that I have highlighted the most interesting and complex functions.
BubbleBubble APIAlgoliaStripeZapierDeepLPostmarkGoogle AnalyticsHTML / CSS / JSAPIREST API

Big Idea Platform

Blockchain · Team Lead · Tech Lead · Full Stack · Close to 12 months · 5

- A platform for creating ideas and patenting them using the blockchain. Additional communication with AWS and document reference database

- participated in all meetings

- Bubble development

- Creating a personal Bubble API

- JS integration

- Developed a duplicate entry in AWS and hashing in the Header of ideas to preserve their uniqueness and safety

- Privacy Rules are configured in detail

- Letters with dynamics and design were developed using Send Grid

- The possibility of selling ideas has been developed P2P, P2B, B2B,B2P

- Developed signing NDA inside the application for idea if there was such a setting

- Developed dynamic permissions for subscriptions that can be edited on the admin panel

- Internal analytics has been developed for both users, business accounts and admins.

- Each document (NDA, Idea, Purchase and Sale Agreement) is duplicated in AWS and hashed in the header, all information can be viewed

- An activity log system has been developed that allows you to view full information about what happened to some entities (for example: Viewing an idea by another user, any change to this entity, an agreement or file that was signed or associated with the entity, etc.)

- A system of collaborators with customizable permissions and roles for a specific owner of this entity has been developed

- Development of adaptive layout of the entire application

- A system for transferring some entities such as ideas of workshops, etc. has been developed.

- Each subscription has its own permissions that can be configured from the bubble side. If a subscription does not have a permission but the user tries to get it, he is offered to upgrade the plan.

- There are also many other functions that I have highlighted the most interesting and complex functions.

Responsibilities
  • Quality control, deadlines, development, create technical specifications and communicate with the client
BubbleAWSHederaMetaMaskVenlyQLDBStripeSendGridHashingHTML / CSS / JSAPIREST API

Swiftle

Team Collaboration · Team Lead · Tech Lead · PM · Full Stack · 3 month, new version 5 month · 6

- A platform for communication with clients, signing acts, contracts, creating news for landing, setting roles for workers and clients, payment system,blog builder, admin panel etc.

Responsibilities
  • Quality control, deadlines, development of complex parts, create technical specifications and communicate with the client
  • participated in all meetings
  • Bubble development
  • Creating a personal Bubble API
  • JS integration
  • Privacy Rules are configured in detail
  • Development of adaptive layout of the entire application
  • A system for signing certificates of completed work with dynamic fields set by the project manager has been developed. The client has the opportunity to leave feedback on each department that worked on his project, separately
  • Possibility of group correspondence between the client team and the development team, with important messages marked, report template and floup
  • An admin panel has been developed with its own analytics and the ability to create and configure roles and their permissions
  • Payment for development from a platform with stripe integration has been developed
  • Letters with dynamics and design were developed using Send Grid
  • There are also many other functions that I have highlighted the most interesting and complex functions.
BubbleStripeSendGridMakeSQLREST APIHTML / CSS / JSAPIREST API

Entice

Social Network · Team Lead · Tech Lead · PM · Close to 6 months ·

A Community For Artists To Share Work, Find Jobs, And Be Inspired all on a single platform.

ENTICE is a creative empowerment community focused on connecting artists and creative people to economic opportunities. We are doing this by building a platform to find inspiration, build your portfolio of work, find your own job opportunities, and sell your own products all in a single space.

I was the technical lead for this project and sometimes replaced the project manager.

Responsibilities
  • Quality control, deadlines, development of complex parts
  • participated in all meetings
  • Bubble development
  • Creating a personal Bubble API
  • JS integration
  • Privacy Rules are configured in detail
  • Development of adaptive layout of the entire application
  • Letters with dynamics and design were developed using Send Grid
  • The functions of liking, saving, sharing a post have been developed. Chatting within the community
  • Marketplace platform developed
  • Converted to webApp using BDK and released to AppleStore and PlayMarket
  • There are also many other functions that I have highlighted the most interesting and complex functions.
BubbleBDKStripeSendGridPDF MonkeyHTML / CSS / JSAPIREST API

Femme Nativa

Healthcare / Fitness · Tech Lead · Team Lead · Close to 6 months · 4

Femma Nativa is a fitness app designed for women by women. Our mission is to help women feel great inside and look great outside. Our style of workouts is mostly low impact and includes cardio. All our workouts and programs are designed to get you lean and toned. And when most women start doing this type of workout, their body just transforms. They slim down, they become toned, and they start feeling more confident than ever. Inside the app you will find these:

1. At-Home Cardio Videos.

We've got you covered! There are a lot of quick workouts for you to choose from in our Challenges section, and we are continually adding new workouts to keep things fresh and exciting. Getting educated about fitness, nutrition, and health is incredibly important. Getting this type of knowledge will help you get results faster and teach you how to stay on track.2. Goal Tracking. Now you can track your progress all in one place. Upload your progress photos so you can see how far you’ve come on your fitness journey.

Need a little extra support and motivation (don’t we all?!). You’ve come to the right place! Our community of women is friendly, and supportive and is on a similar journey to you. Create your accountability groups, send direct messages, or read through everyone else’s posts and questions for motivation. And finally, we all know how important nutrition is for not only weight loss but your general health. So we have an 8-week nutrition plan that is tailored to your specific body type. It includes both a regular and vegan meal plan, with over 100 healthy recipes. And this nutrition plan is key to helping you achieve results long term. We have designed the Femme Nativa App to help users achieve long-term success

Responsibilities
  • Quality control, deadlines, development of complex parts
  • participated in all meetings
  • Bubble development
  • Creating a personal Bubble API
  • JS integration
  • Privacy Rules are configured in detail
  • Development of adaptive layout of the entire application
  • Letters with dynamics and design were developed using Send Grid
  • Converted to webApp using BDK and released to AppleStore and PlayMarket
  • Edit the course, plan, nutrition, link or delete different products in shopify
  • Choice of duration a specific training program.
  • There are also many other functions that I have highlighted the most interesting and complex functions.
BubbleBDKStripeSendGridShopifyHTML / CSS / JSAPIREST API

Squares

Marketplace · Full Stack Developer · PM · 3 months · 3

- Marketplace for renting space for events with various loyalty systems integrations

Responsibilities
  • Quality control, deadlines, development of complex parts
  • participated in all meetings
  • Bubble development
  • Creating a personal Bubble API
  • JS integration
  • Privacy Rules are configured in detail
  • Development of adaptive layout of the entire application
  • Letters with dynamics and design were developed using Send Grid
  • Hourly booking of different types of locations
  • Location placement by the landlord
  • Automatic calculation of cost depending on addition services
  • Referral system
  • Promocodes
  • Automatic recommendations
  • GPS navigation
  • There are also many other functions that I have highlighted the most interesting and complex functions.
BubbleFigmaHTML / CSS / JSAPIREST API

Sets Learning

Education · Tech Lead · Team Lead · Full Stack · 4 months · 5

Platform for learning with the roles of Teacher, Student and Administrator. There is a calendar of classes, video calls, payment via stripe. Opportunity to earn money using the referral program

Responsibilities
  • Quality control, deadlines, development of complex parts, Assistance in developing technical specifications
  • participated in all meetings
  • Bubble development
  • JS integration
  • Privacy Rules are configured in detail
  • Development of adaptive layout of the entire application
  • Letters with dynamics and design were developed using Send Grid
  • The ability to create your own lessons for students has been developed
  • The ability to set up a calendar for a teacher and book calls with it for a student has been developed
  • Video Calls with Lessonsscape
  • Possibility to pay for calls or a pack of calls using stripe within the platform
  • There are also many other functions that I have highlighted the most interesting and complex functions.
BubbleREST APIStripeDaily.coLessonspaceNativlyHTML / CSS / JSAPIREST API

Personaliser.io

Automation / AI · Tech Lead · 2 months · 2

Generate and send personalized messages based on data from LinkedIn using AI

Responsibilities
  • Quality control, deadlines, development
  • participated in all meetings
  • Bubble development
  • JS integration
  • Development of adaptive layout of the entire application
  • Generate and send personalized messages based on data from LinkedIn using AI
  • There are also many other functions that I have highlighted the most interesting and complex functions.
BubbleOpenAILinkedIn APIHTML / CSS / JSAPIREST API

Le Collaborateur

AI · Tech Lead · 2 months · 3

- A platform that allows you to upload documents and edit them using AI, create new versions

Responsibilities
  • Quality control, deadlines, development of complex parts
  • participated in all meetings
  • Bubble development
  • JS integration
  • Development of adaptive layout of the entire application
  • A platform that allows you to upload documents and edit them using AI, create new versions
  • There are also many other functions that I have highlighted the most interesting and complex functions.
BubbleOpenAICustom Bubble pluginHTML / CSS / JSAPIREST API

Recruitment Platform

HR / Psychometrics · Full Stack Developer · Tech Lead · 4 month · 4

We enable our clients to generate massive ROI by using scientifically validated psychometric tests to select the best candidates.

We charge you a simple and transparent flat fee per vacancy. That way, you can screen all qualified candidates, maximizing the validity of your hiring process.

We follow the scientific literature and develop tests that best predict on-the-job performance. Our tests are scientifically validated so you can be confident they actually work.

We recommend which assessments best suit your needs and advise you how to weigh the assessments to maximize predictive validity.

We also offer a comprehensive assessment creation tool so you can develop your own assessments or import assessments you are already using.

Responsibilities
  • participated in all meetings
  • Bubble development
  • JS integration
  • Forming links by passes relative to the user's route through the pages
  • Each user role has its own permissions that can be configured from the bubble side
  • There are also many other functions that I have highlighted the most interesting and complex functions
  • I took over the project after two previous teams and performed an extensive optimization and restructuring of both the database and UI elements. By streamlining the architecture, I achieved up to a 10x increase in performance in several areas, transforming a sluggish, unresponsive site into a smooth and user-friendly experience
BubbleBubble APIStripeJavaScriptHTML / CSS / JSAPIREST API
Automation

Automation that pays for itself

Real workflows I've automated — fewer manual steps, fewer errors, hours saved.

Lead processing

Set up automatic lead-card population for a company: submissions from Meta Lead Forms are parsed, every needed field is extracted and written straight into the CRM — zero manual data entry.

N8NMeta Lead FormsCRM API

Country from phone number

The CRM had no country detection. I added an automation: the moment a phone number lands on a lead, the 'Country' field updates instantly from the dialing code.

N8NCRM API

Call processing & transcripts

Integrated Sembly (AI call assistant): it records and transcribes each meeting, then an automation searches the CRM for an entity by participants' emails across types (lead, user, etc.). If found, the transcript is attached to it; if not, a Slack alert is raised for manual handling.

SemblyN8NCRM APISlack

CRM required-field guard

Required-field validation was a paid-tier CRM feature — so I built my own. Weekly it scans every record across all data types; if fields are missing it tags each salesperson in Slack for their own records, listing exactly what to fix. Clean next week? No tag. Records can be marked 'ignore' straight from Slack.

N8NCRM APISlack
✦ AI

Personalized lead outreach

Personalized email campaigns to hot and cold leads, where every message is generated by AI. The model is fed data pulled from the lead's LinkedIn profile together with notes and fields from the CRM, then writes copy tailored to the lead's stage and context. Segments come from the CRM; messages are sent and tracked through SendGrid.

N8NOpenAILinkedInCRMSendGrid
✦ AI

Auto lead scoring

Every new lead is scored automatically by source, budget and reply speed, then sorted into hot, warm or cold. Sales see a ranked list and work the best leads first, no manual sorting.

N8NCRM APIOpenAI

Invoice and payment sync

Paid invoices from Stripe update the linked CRM deal to “paid” and trigger a thank-you email. Overdue ones raise a reminder to the client and a Slack ping to the manager.

N8NStripeCRM APISlackSendGrid

Daily pipeline digest

Each morning the team gets a Slack digest: new leads, stage changes, deals with no activity for X days and today's scheduled calls. Managers start the day knowing exactly what needs attention.

N8NCRM APISlackOther APIs

Stale lead re-engagement

Leads with no reply for a set period are pulled automatically and sent a personalized re-engagement message tuned to their last stage. Responses route back to the rep, the rest stay in a nurture loop.

N8NCRMPostmark

Review and feedback collection

After a deal closes or a project ships, the client gets an automatic request for feedback. Positive replies are routed to a public review link, critical ones go straight to the manager in Slack.

N8NCRM APIPostmarkSlack
✦ AI

AI research agent

Give it a company or a lead, and the agent gathers public data, builds a short profile with industry, size and likely needs, and writes it straight into the CRM card before the first call.

N8NClaudeWeb searchCRM API
✦ AI

AI inbox agent

The agent reads new emails, sorts them by intent, drafts replies for routine ones, flags anything that needs a human, and turns real requests into CRM leads or tasks automatically.

N8NClaudeCRM APIGmail
✦ AI

Multi-agent pipeline

Several agents work as a team: one qualifies the lead, one researches it, one writes the outreach, one schedules the follow-up. Each hands off to the next, with a human approving only the final step.

N8NClaudeCRM APISlack
✦ AI

Hospitality — Guest check-in agent

Bookings from any channel sync into one place. The system sends pre-arrival instructions, collects guest data, and an agent answers common questions (wifi, check-out, parking) in chat around the clock, escalating only real cases to staff.

N8NClaudeBooking APIWhatsApp
✦ AI

Hospitality — Review and reputation

After check-out each guest gets an automatic feedback request. Positive replies are routed to public review sites, complaints go straight to the manager with a draft response, so issues are handled before they go public.

N8NClaudeCRMEmail

Logistics — Shipment tracking and alerts

Every order is tracked across carriers. Delays, stuck parcels or failed deliveries trigger an instant alert to the client and the ops team, with the next action already suggested.

N8NCarrier APIsSlackSendGrid
✦ AI

Logistics — Route and load planning

Daily orders are grouped by zone and an agent proposes an optimized route and load order, cutting empty mileage and manual planning. Drivers get the ready plan on their phone.

N8NClaudeMaps APITelegram

Retail — Stock and reorder guard

Inventory is monitored across channels. When a product drops below threshold, the system drafts a reorder, flags slow movers, and warns about items about to sell out before a campaign.

N8NCRM / ERP APISlack

Retail — Price and competitor watch

Competitor prices and your own catalog are checked on a schedule. Significant changes raise an alert with a suggested price move, so you react in hours, not weeks.

N8NWeb scrapingSheetsSlack

Finance — Invoice and payment reconciliation

Incoming payments are matched to invoices automatically. Paid ones update status and send a receipt, overdue ones trigger a polite reminder chain and a manager ping.

N8NStripe / Bank APICRMSendGrid
✦ AI

Finance — Expense and document agent

Receipts and invoices sent to one inbox are read by an agent that extracts amounts, dates and categories, writes them into the accounting sheet, and flags anything that looks off for review.

N8NClaudeOCRSheets
✦ AI

Real estate — Lead-to-viewing agent

New property inquiries are qualified by an agent, matched to suitable listings, and offered viewing slots automatically. Confirmed viewings land in the agent's calendar with a reminder to the client.

N8NClaudeCRMCalendar

Healthcare / Services — Appointment flow

Bookings, reminders and rescheduling run automatically. No-show risks get an extra nudge, freed slots are offered to the waitlist, and the front desk stops chasing confirmations.

N8NCalendarWhatsAppCRM

And these are only a few — there are many more.

RAG / Knowledge

RAG systems — chat with your own data

Assistants grounded in your own documents — accurate answers with citations, nothing invented.

✦ AI

Company knowledge assistant

An assistant that answers from your own documents, wikis and past projects. Staff ask in plain language and get an exact answer with a link to the source, instead of searching folders. New hires get up to speed in days, not weeks.

QdrantOpenAI embeddingsClaudeLangChainn8nCustom interfaceSelf-hosted
✦ AI

Customer support bot

A support bot grounded in your product docs, FAQ and past tickets. It answers real customer questions accurately, cites the source, and hands off to a human only when the answer is not in the knowledge base.

PineconeOpenAI embeddingsClaudeLangChainn8nWeb widgetCustom interface
✦ AI

Document Q&A

Upload contracts, reports or manuals and ask questions in natural language. The system pulls the exact clause or figure and quotes where it came from, so nothing is invented.

LlamaIndexpgvectorOpenAIOCRLlamaParseCustom interfaceSelf-hosted
✦ AI

Sales and proposal helper

An assistant that knows your pricing, case studies and past proposals. It drafts tailored offers and answers client questions using only your verified materials, keeping every claim on-brand and accurate.

WeaviateClaudeOpenAI embeddingsLangChainn8nCustom interface
✦ AI

Legal and compliance search

Search across policies, regulations and internal rules by meaning, not keywords. The system returns the relevant passages with citations, so review is faster and traceable.

QdrantCohere embeddingsClaudeLlamaIndexCustom interfaceOllamaSelf-hosted
✦ AI

Personal / expert clone

A chatbot trained on one person's content (courses, posts, transcripts) that answers in their voice and knowledge. Useful for creators, coaches and experts who want to scale their advice.

ChromaOpenAILangChainn8nTelegramWeb widgetCustom interface

Maybe I can automate something you haven't even thought of

Book a call or message me on LinkedIn with the processes you repeat over and over — and I'll tell you, for free, whether they can be optimized and roughly how long it would take.

AI Studio

AI Content Studio

Image, video, music, voice and avatars with AI — from the idea to the final reel, with cloud and local (ComfyUI) tools.

AI content production services: AI image generation · AI avatars & characters · AI video generation · AI music & sound · AI voice generation · Social media content · Editing & post-production · Design & content prep · Local / self-hosted AI · End-to-end content production.

AI image generation

Original visuals, product shots, portraits and model imagery — single images or 5–10 image series — with consistent style and characters.

MidjourneyLeonardo AIFLUXDALL·ENano Banana ProComfyUI

AI avatars & characters

Consistent AI characters and avatars — a recurring brand face or model across images and video, including talking AI-avatar videos.

HeyGenComfyUIFLUXLoRAIPAdapter

AI video generation

Short clips and motion (5–30s) from prompts and still images — promos, teasers, AI reels and animatics.

Kling AIVeoCapCutComfyUIWan 2.2

AI music & sound

Background music, atmospheric soundscapes and short musical pieces for AI reels, ad creatives and storytelling videos — matched to the mood, script, audience and visual style with Suno AI.

Suno AIComfyUIACE-StepStable Audio

AI voice generation

Cloning and synthesizing natural voiceovers and narration in multiple languages.

ElevenLabsF5-TTSXTTSRVCComfyUI

Social media content

Ready-to-post content for Instagram and socials — single posts, 5–8 slide carousels and full monthly content packages.

CanvaInstagramCarouselsMonthly packages

Editing & post-production

Upscaling, retouching and editing/montage — turning raw AI images and video into finished, polished deliverables.

CapCutCanvaUpscaleRetouch

Design & content prep

Social visuals, covers, stories, presentations, portfolio layouts, simple ad mockups and text-on-image — the final, polished delivery of AI content for brands.

CanvaCapCut

Local / self-hosted AI

Setting up and running AI models on a local machine for privacy, full control and zero per-use cost.

ComfyUIOllamaLM StudioStable Diffusion

End-to-end content production

The full content cycle in one hand: idea → script → image generation → AI animation → editing → music & sound → final reel or ad creative.

Idea & scriptGenerationEditingMusic & sound

AI toolkit: Midjourney, Leonardo AI, FLUX, DALL·E, Nano Banana Pro, ComfyUI, HeyGen, LoRA, IPAdapter, Kling AI, Veo, CapCut, Wan 2.2, Suno AI, ACE-Step, Stable Audio, ElevenLabs, F5-TTS, XTTS, RVC, Canva, Instagram, Carousels, Monthly packages, Upscale, Retouch, Ollama, LM Studio, Stable Diffusion, Idea & script, Generation, Editing, Music & sound.

Also exploring: Dzine AI, Higgsfield.

AI Media

AI image & video

Generated visuals — image & motion experiments and client work.

AI video + soundPingvin TransferWhen a brand has its own hero, even cargo transport feels warmer. For this video I brought the Pingvin logo to life, turning it into a small brand hero that doesn't just "ride in frame" but creates emotion, becomes memorable, and brings the service closer to people. Pingvin comes alive from the logo and sets off on the road to remind us: cargo also needs care, precision, and reliable hands. This is an example of how AI visuals can help a local business create a recognizable character, strengthen the brand, make advertising feel alive, and stand out from competitors without a classic shoot. Transport across Slavutych and Ukraine. Renault vehicle up to 1.5 tons. Loaders available on request. To confirm pricing and place an order: +380 50 383 18 45. Pingvin - we'll deliver your cargo wherever it needs to go. And if your brand also has a logo, product, vehicle, storefront, or character, it can be brought to life and turned into a promo reel people want to watch to the end.
AI video + soundAvatar + SongA static AI visual comes to life. I created a premium AI creator look, added an original song, and turned the image into an avatar / lip sync video. This is no longer just a picture - it's a visual character that can speak, sing, and convey the brand's mood. This format suits beauty, fashion, expert pages, presentations, and creative reels. AI visuals can become a living part of your story.
AI video + soundAssumption Cathedral, Kyiv Pechersk LavraOn June 15, 2026, the Assumption Cathedral of the Kyiv Pechersk Lavra was damaged in an attack. Fire touched a shrine that is part of Ukraine's spiritual and cultural memory. When a shrine passes through fire, it does not disappear. It becomes a symbol of faith, strength, and resilience. The sky over Ukraine remembers every wound. And every restoration begins with light. This reel is an artistic AI visualization based on real events. It is not documentary footage, but a symbolic story about pain, protection, faith, and revival. Ukraine is Free! Ukraine is Strong! Ukraine is Alive!
AI video + soundLion RobeThe little lion is heading off on a long vacation, but not before warming up a few little ones after bath time. The Lion terry robe is a soft hug after a bath, the pool, or the sea. A cozy hood with a lion cub face, a pleasant terry texture, and that moment when a child looks in the mirror and smiles.
AI photoOld Money style — 1Sometimes one photo is enough to see yourself in a completely different image. AI visualization helps you test a style before buying clothes, doing a shoot, or changing your image. It's not just a “nice photo” — it's a way to understand: is this my style, or do I want something different? I create aesthetic AI visuals for personal branding, content, and styling.
AI photoOld Money style — 2Sometimes one photo is enough to see yourself in a completely different image. AI visualization helps you test a style before buying clothes, doing a shoot, or changing your image. It's not just a “nice photo” — it's a way to understand: is this my style, or do I want something different? I create aesthetic AI visuals for personal branding, content, and styling.
AI photoOld Money style — 3Sometimes one photo is enough to see yourself in a completely different image. AI visualization helps you test a style before buying clothes, doing a shoot, or changing your image. It's not just a “nice photo” — it's a way to understand: is this my style, or do I want something different? I create aesthetic AI visuals for personal branding, content, and styling.
AI photoVyshyvanka — 1AI-generated visual in a Ukrainian vyshyvanka.
AI photoVyshyvanka — 2AI-generated visual in a Ukrainian vyshyvanka.
AI photoVyshyvanka — 3AI-generated visual in a Ukrainian vyshyvanka.
AI photoRoom — 1AI-generated interior visualization. Exploring atmosphere, light, and styling for a space — created entirely with AI.
AI photoRoom — 2AI-generated interior visualization. Exploring atmosphere, light, and styling for a space — created entirely with AI.
AI photoRoom — 3AI-generated interior visualization. Exploring atmosphere, light, and styling for a space — created entirely with AI.
AI photoRoom — 4AI-generated interior visualization. Exploring atmosphere, light, and styling for a space — created entirely with AI.
AI photoRoom — 5AI-generated interior visualization. Exploring atmosphere, light, and styling for a space — created entirely with AI.
AI photoClassicAI-generated fashion visual in a classic look. Clean styling and natural light — created entirely with AI.
FAQ

Frequently asked questions

Quick answers about services, experience and working together.

Who is Serhii Lozovskyi?

Serhii Lozovskyi is an end-to-end product builder with 6+ years of experience and 70+ delivered projects. He builds web and mobile products using no-code (Bubble), traditional code, and AI — covering everything from product strategy and architecture to development, automation and AI content.

What services does Serhii Lozovskyi offer?

Product development (Bubble and no-code plus custom code), AI content production (image, video, music, voice and avatar generation), workflow automation (n8n, Make, Zapier, CRM integrations), API integrations, and product management and technical leadership.

Can Serhii build a Bubble or no-code app?

Yes. Bubble is his strongest skill at expert level. He builds and maintains complex web and mobile apps, custom Bubble APIs and plugins, secure data access (Privacy Rules) and integrations with virtually any third-party service. He has also mentored 50+ Bubble developers.

Does Serhii offer AI content creation?

Yes — full-cycle AI content production: image generation (Midjourney, FLUX, Leonardo AI, ComfyUI), consistent AI avatars and characters, video generation (Kling AI, Veo, Wan 2.2), AI music and voiceovers (Suno AI, ElevenLabs), and ready-to-publish social media content from single posts to monthly packages.

What automation can Serhii set up?

Lead processing and CRM automation, AI call transcription and routing, personalized cold and warm email outreach, data enrichment, and custom workflows with n8n, Make, Zapier and APIs — cutting manual work and errors.

Is Serhii available for freelance or full-time work?

Yes. He is open to both freelance projects and full-time roles, and works with international clients in English and Ukrainian.

Why hire Serhii Lozovskyi?

He combines deep technical expertise with business-driven product thinking, covering the whole journey from idea and architecture to a launched product, including the visual and content layer. 70+ projects delivered, 200+ projects estimated, 50+ people mentored.

How can I contact or hire Serhii Lozovskyi?

Email slozovsk@gmail.com, connect on LinkedIn, or book a call directly from this site. He replies in English and Ukrainian.

Experience

Experience

Roles and companies — see the latest on LinkedIn.

View on LinkedIn ↗
KeenEthics ↗2 yrs 3 mos · Kyiv City, Ukraine · Remote

Tech Lead, Low-Code & Automation & AI solutions

Full-time · May 2024 – Jun 2026 · 2 yrs 2 mos · Kyiv City, Ukraine · Remote

Leading KeenEthics' low-code/no-code & automation practice — a department-level tech-lead role spanning hands-on delivery, presale, and team direction. Architecting and shipping AI and non-AI automation (n8n + OpenAI/Claude): multi-step agentic pipelines, API integrations, and business-process automation. Rapid MVP prototyping with AI coding tools (Claude Code, Cursor) and no/low-code platforms for presale and validation; Bubble applications delivered full-cycle. Technical assessment, estimation, and solution design for complex no/low-code projects.

No/Low code · Technical Leadership · Workflow Automation · AI Automation · Agentic AI · LLM · Claude Code · n8n · API Integration · +13 skills

Estimating Manager

Part-time · Apr 2024 – May 2024 · 2 mos · Kyiv City, Ukraine · Remote

Technical assessment of no/low-code projects. Presale support. Technical solutions for complex problems.

Bubble · No/Low code · +3 skills
Swiftle ↗Full-time · 3 yrs 3 mos

Chief Technology Officer

Jan 2023 – Apr 2024 · 1 yr 4 mos · Remote
Team Management · Communication with Clients · +16 skills

Deputy Chief Technology Officer

Feb 2021 – Dec 2022 · 1 yr 11 mos · Ukraine
Bubble · Team Management · +15 skills

Web Developer

Feb 2021 – Oct 2022 · 1 yr 9 mos
Financial Reporting · Problem Solving

Team Lead Manager

Feb 2021 – Oct 2022 · 1 yr 9 mos · Ukraine
Team Management · Zapier · +12 skills
Education

Education

Degrees and training.

View on LinkedIn ↗

State University of Information and Communication Technologies

Aug 2020 – Jun 2024
Bachelor’s Degree — Cybersecurity (Information and Cybersecurity Management)

Bachelor’s degree in Cybersecurity (specialty 125), program “Information and Cybersecurity Management”, full-time. Covered information security architecture, comprehensive information protection systems, applied cryptography, computer networks, operating systems, malware protection, digital forensics, security audit, and the legal framework of cybersecurity — plus applied programming, cloud technology and artificial intelligence. Thesis: “Development of a system for detecting and preventing cyber attacks in mobile applications and IoT devices.” This foundation directly supports my work — building secure architectures, configuring proper data access rules and integrating third-party services reliably.

Cybersecurity · Information Security · +3 skills

IT STEP Computer Academy

Aug 2018 – Aug 2019
Web Designer
Certificates

Licenses & certifications

Verified credentials.

Introduction to Model Context Protocol

Anthropic
Issued May 2026
ID: o3ymkbgoo58j
Show credential ↗
Contact

Let’s build something

Open to freelance projects and full-time roles.