Hryhorii
NikitenkoBubble.io Developer & Vibe Coding / AI Integration Engineer
8+ years building Bubble.io apps — from landing pages to complex custom CRM & SaaS platforms.

About — Bubble.io Developer
Professionally, I've worked in a variety of roles, from landing page development to developing complex CRM systems and interfaces with Bubble, which has helped me understand my strengths.
I have been an expert in creating Bubble apps for the past 8 years. During this time, I developed applications of varying complexity — from landing pages to complex custom CRM and SaaS.
Captured by the ability to create amazing user experiences and innovate with the latest tech. I have found myself with a passion to build with Bubble and to work with people to realize their dream outcomes for their businesses, including my own.
Day to day I work the vibecoding way — building together with AI. Language models take the first drafts, the repetitive logic and the throwaway prototypes, while I stay responsible for architecture, quality and product decisions. It shortens the road from idea to a working MVP considerably, without trading away reliability.
Strengths
No-Code & AI Engineering Skills
AI-Assisted Development & AI Integration
Alongside Bubble.io, I work as a vibe coding developer: I build web apps, MVPs and websites together with AI and integrate LLMs into existing products — with the architecture, security and code review an experienced developer is responsible for.
Vibe Coding Development
AI-assisted development of web apps, landing pages and AI MVPs. AI takes the first drafts and the routine code, I own the architecture, the review and the launch — faster delivery without fragile code.
Bubble.io OpenAI & ChatGPT Integration
AI features inside Bubble.io apps: OpenAI, ChatGPT and Claude through the API Connector, chat assistants with conversation history, content generation, document processing and AI-powered search.
AI Agents & LLM API Integration
AI agent development, LLM API integration and AI workflow automation for existing products and internal tools — including prompt engineering, data flow and keeping AI costs under control.
Fix Vibe-Coded Apps
An app built with Lovable, Bolt, Replit or Cursor that breaks with real users? I audit the code, fix bugs and security issues and take the AI-generated app to production.
Portfolio
Snapback — Binance Trading Bot
30hWeb service for automated trading on Binance USDT-M futures: a market scanner catches sharp price pumps and opens short positions with a stop-loss, take-profit ladder and breakeven stop. Backtesting on a year of historical data, risk limits, encrypted API keys and Telegram alerts. Built end-to-end with AI — vibe coding and AI-assisted development of a full-stack web app.
Massage Studio — HN Body & Face
8hLanding page for a Kraków massage studio: catalogue of signature techniques, gift vouchers, booking enquiry form and Google Ads conversion tracking. Built the vibe coding way — AI-assisted web development.
Be-Incremental
30hMultifunction platform for marketing teams to optimize brand visibility on SERP.
Coaching Website
40hCoaching platform for team and personal development with full-stack Bubble development.
LMS Platform — FinAcademy
100hLearning management system co-developed with another developer. Integrates with API platforms and payment systems.
CRM + Marketplace — Reelly
120hPlatform for builders and realtors combining CRM and marketplace. Converted to native mobile apps.
Custom CRM
150hInternal-use CRM with MySQL database, full-stack development and third-party integrations.
Kidzify — AI Story App
40hMobile app for creating stories in the voice of loved ones, with AI integration.
+ A large number of projects developed for internal use (CRM, internal chats, Telegram bot chat, Viber business chats, etc.)
Bubble.io, No-Code & AI FAQ
How long does it take to build an MVP in Bubble.io?
A focused no-code MVP usually takes 3 to 6 weeks from the first call to launch. Working the vibe coding way - building together with AI - shortens the repetitive parts considerably, so more of the schedule goes into architecture, data structure and testing rather than routine setup.
Can Bubble.io handle a real CRM or SaaS product?
Yes. Over the past 8 years I have built custom CRM systems, an LMS platform, a CRM and marketplace for real estate, and internal tools with relational databases, role-based access and third-party API integrations. Bubble.io handles production workloads well when the database and workflows are designed properly from the start.
Bubble.io vs custom code - which should I choose?
Choose Bubble.io when speed to market and cost matter more than owning the source code: you validate the idea in weeks instead of months and can change the product without a development team. Choose custom code when you need extreme scale, a very specific tech stack or offline-first mobile. Many startups launch on Bubble.io and move to custom code only after the market is proven.
What is vibe coding and how do you use it?
Vibe coding means building together with AI: language models take the first drafts, the repetitive logic and the throwaway prototypes, while I stay responsible for architecture, quality and product decisions. It shortens the road from idea to a working MVP considerably, without trading away reliability.
Can you add AI features to an existing app?
Yes. I integrate LLM APIs, AI agents and automation into both Bubble.io apps and existing products - text generation, document processing, smart search, chat assistants and AI-driven workflows, including prompt engineering and the workflow design around them.
Can you take over or fix an existing Bubble.io app?
Yes. I regularly pick up Bubble.io projects started by someone else - auditing the database structure and workflows, fixing broken logic, improving performance and adding new features. The first step is a short audit, so you know what is worth fixing and what is cheaper to rebuild.
Can you fix an app built with Lovable, Bolt or Cursor?
Yes. AI-generated apps often work in a demo but break with real users: missing access rules, exposed API keys, duplicated logic. I start with an audit of the code, database and security, then fix what is critical and take the vibe-coded app to production - or recommend a rebuild when that is cheaper.
How do you integrate OpenAI or ChatGPT into a Bubble.io app?
Through the Bubble.io API Connector and backend workflows: the app sends a prompt with the right context to OpenAI, Claude or another LLM API and saves the response to the database. API keys stay on the server side, and I design the prompts, conversation history and usage limits so AI costs stay predictable.
Hire a Bubble.io Developer
Location
Ukraine
Zaporizhzhia
Let's Work Together
Have a project in mind? I'd love to hear about it. Reach out and let's build something great.