Hire the Best OpenAI Developers

Most founders spend months coordinating designers, backend developers, and mobile teams only to end up with a product that doesn't communicate on its own. So I work differently. I build modern web and mobile apps end-to-end, with frontend, backend, AI integration, and cross-platform integration, without the rebuild later. 🚀 What I build - AI-Powered Web Apps Next.js, React, OpenAI/Claude API, intelligent automation that actually reduces your team's manual workload - SaaS Platforms auth, billing (Stripe), real-time features (Supabase/WebSockets), built to scale from day one - Cross-Platform Mobile React Native & Flutter, sharing logic with your web app so you ship to iOS and Android without running two separate codebases - Backend & APIs Node.js, PostgreSQL, RESTful architecture clean enough for any future dev to inherit 💬 What clients say "Ulil is an excellent communicator and a great developer. He was a pleasure to work with. I would happily work withhim again in the future." Founder - Music Education Platform Client 🛠 How I work Scope defined upfront. Milestone-based delivery. Daily updates or weekly your preference. Clean, documented code that your team can maintain without calling me every week. 📩 Let's talk Tell me what you're building. I'll respond within a few hours with honest feedback on scope, timeline, and whether I'm the right fit. Free 15-min scoping call if it looks like a match.

Launch Production Ready AI Chatbots, RAG Systems & Multi-Agent LLM Apps in 2 Weeks Business owners & tech leads: Stop wasting time on generic developers. Get 80% workflow automation and 3x conversion boosts with my battle-tested AI systems using LangChain, LangGraph, CrewAI, AutoGen, LlamaIndex, OpenAI GPT, Gemini , Claude, and custom fine-tuned LLMs. 4+ Years Production AI Experience: - LangChain/LangGraph multi-agent orchestration & complex workflows - CrewAI/AutoGen collaborative agent systems with task routing - RAG pipelines (Pinecone, Weaviate, Qdrant, FAISS vector databases) - OpenAI/Gemini/Anthropic API optimization & prompt engineering - FastAPI production-grade microservices & real-time APIs - Next.js 15/React 19 full-stack AI dashboards & admin panels - Voice AI agents (ElevenLabs, Deepgram, Whisper transcription) Proven Results (Real Client Projects): - AI Recruitment Platform: 300+ monthly referrals, 92% candidate match accuracy using LangGraph + MongoDB RAG - Enterprise RAG Chatbot: 87% query auto-resolution, reduced support tickets by 72% (Pinecone + GPT) - E-commerce AI: 45% cart recovery rate via personalized recommendations (Next.js + OpenAI embeddings) - Trading Bot System: 23% ROI improvement through multi-agent market analysis (CrewAI + real-time data) Complete Tech Stack: - FRONTEND: Next.js 15 • React 19 • Tailwind CSS • Shadcn UI • Framer Motion - BACKEND: FastAPI • Python 3.12 • Celery • Redis • PostgreSQL • MongoDB - AI/LLM: LangChain • LangGraph • CrewAI • LlamaIndex • Hugging Face • Ollama - VECTOR DB: Pinecone • Weaviate • Qdrant • Chroma • FAISS - DEPLOYMENT: AWS (Lambda, ECS) • Google Cloud Run • Vercel • Docker • Kubernetes My 3-Week Delivery Framework: - Week 1: Discovery + MVP FREE 30-min AI architecture audit Custom system design with your data LangChain RAG prototype deployed - Week 2: Production Features Multi-agent workflows (CrewAI/LangGraph) Real-time dashboards (Next.js + FastAPI) Vector database integration (Pinecone/Weaviate) - Week 3: Launch Ready Full testing + optimization Cloud deployment (AWS/GCP/Vercel) Documentation + 30-day support Target Clients Getting Results: ✅ SaaS companies needing AI customer support ✅ E-commerce wanting personalized recommendations ✅ Recruitment agencies building candidate matching ✅ Financial firms developing trading/forecasting AI ✅ Any business wanting 80% workflow automation Message me NOW for your FREE AI strategy session. I'll show you exactly how to automate your biggest bottleneck with production ready AI. Primary Skills: LangChain - RAG - CrewAI - LangGraph - OpenAI GPT - FastAPI - Pinecone - Next.js - Multi-Agent AI - Vector Databases - LlamaIndex - AutoGen - Prompt Engineering - AI Chatbots

If you need a high-performing website, a custom web app, or an AI-powered solution built from scratch, and you want it done right the first time then you are in the right place. I'm a Shopify & MERN Stack developer with $100K+ earned on Upwork and a 90% Job Success Score. I work with founders and business owners who need more than just a "pretty website" they need a store or app that's fast, conversion-focused, and built to scale. Here's what I build: * E-Commerce Stores — Custom Shopify & WordPress stores built from scratch, optimized for speed, UX, and conversions. No cookie-cutter templates. * MERN Stack & Next.js Apps — Full stack web applications built with MongoDB, Express, React & Node.js. Fast, scalable, and tailored to your business logic. * AI-Powered Solutions — Custom AI chatbots, automation workflows, and AI integrations that save time and improve customer experience. My process is simple: * Understand your business goals first, code second * Agile execution with clear communication throughout * Clean, maintainable code, no shortcuts I've helped startups and established brands launch digital products that actually perform. If you have a project in mind, send me a message and let's talk about it.

I've delivered 6,700+ hours and $100K+ on Upwork with a 5.0 rating across 23 jobs, building production Vue/Nuxt/Next.js apps and, more recently, AI-powered products end to end. Most recently I built Zvid, an AI video/image creation platform: a browser-based editor, a rendering pipeline, a validated JSON project schema, stock-media integrations, and an MCP/API layer that lets AI assistants generate videos programmatically. I designed the architecture, built the editor and rendering infrastructure, and shipped it to production. What I do best: Front-end: Vue 2/3, Nuxt, Next.js, React, TypeScript, Tailwind, complex SPAs, dashboards, editors, e-commerce Back-end: Node.js, GraphQL, REST APIs, PostgreSQL, MySQL, MongoDB, Redis AI integration: LangChain, LangGraph, RAG pipelines, OpenAI/Anthropic APIs, AI agents, MCP servers Automation: n8n workflows connecting your CRM, email, and internal tools Why clients keep me around: my three largest Upwork contracts ran 3,709, 1,896, and 320 hours, clients hire me for a task and keep me for years. I answer within 0–4 hours, write clean, tested code, and explain technical trade-offs in plain language. I'm also in the top ranks on Stack Overflow (17,800+ reputation, 930+ answers), so debugging hard problems is literally what I do for fun. A good fit if you need: a SaaS product built or rescued, AI features added to an existing app, an LLM agent or chatbot that actually works in production, or business processes automated with n8n. Send me a message with what you're building, I'll reply with a concrete plan, not a template.

Stop wasting months building an app that isn't ready for real users. Whether you're launching an MVP, scaling a SaaS platform, fixing an existing Bubble io application, or taking over a project another developer left unfinished, I help founders turn ideas into production-ready Bubble applications that are fast, scalable, and built for long-term growth. With 3+ years of professional Bubble io experience, I've built custom web applications, AI-powered SaaS platforms, marketplaces, internal business systems, and workflow automation tools that solve real business problems, not just look good in a demo. I don't just build Bubble apps. I build applications that are maintainable, optimized, and ready for real users. What I Can Help You Build: • Bubble io SaaS Applications • Custom Business Applications • AI-Powered Applications (OpenAI, ChatGPT) • Marketplace Platforms • MVP Development • Internal Business Tools • CRM Systems • Client Portals • Booking & Scheduling Platforms • Subscription Platforms • Admin Dashboards • Customer Dashboards • Mobile-Responsive Web Applications Bubble io Services: • Full Bubble io Application Development • Existing Bubble App Improvements • Bubble Debugging & Bug Fixes • Bubble Performance Optimization • Workflow Optimization • Database Structure Optimization • App Architecture Review • Technical Audits • UX/UI Improvements • Mobile Responsiveness • Production Deployment • End-to-End Testing • QA Testing • Long-Term Maintenance & Support API & Third-Party Integrations: I have extensive experience integrating Bubble with third-party services, including: • OpenAI / ChatGPT • Stripe & Stripe Connect • Payment Gateways • REST APIs • Webhooks • Google Maps • Email & SMS Notifications • Authentication Systems • AI Automation • Custom API Integrations Why Clients Hire Me: Many Bubble developers can build pages and workflows. My focus is building applications that continue performing as your business grows. That means: • Clean, scalable database architecture • Optimized backend workflows • Fast page performance • Low Workload Unit consumption • Secure user authentication and role-based permissions • Reliable API integrations • Responsive layouts across desktop, tablet, and mobile • Production-ready applications—not fragile prototypes Proven Results: • Built AI-powered SaaS platforms that automated up to 80% of manual business processes. • Developed multi-vendor marketplace applications with secure payment processing and scalable dashboards. • Optimized slow Bubble applications, improving performance by up to 5× while reducing workflow bottlenecks. • Implemented Stripe subscription systems, payment automation, API integrations, and workflow automation for growing businesses. • Helped founders launch scalable MVPs in weeks, allowing them to validate ideas faster and iterate based on real user feedback. If You Already Have a Bubble App...I frequently work on existing Bubble projects. Whether your application needs debugging, performance optimization, new features, workflow improvements, database restructuring, mobile responsiveness, or a complete technical audit, I can quickly identify what's slowing it down and recommend the most efficient path forward. I'm comfortable taking over projects built by other developers and improving them without disrupting your existing users. What You Can Expect: • Clear communication • Fast turnaround • Proactive problem solving • Clean documentation • Reliable execution • Long-term collaboration • Independent ownership of tasks • High-quality, maintainable Bubble development If you're looking for a Bubble io developer who can build, optimize, debug, and scale production-ready applications that your users can rely on, I'd be happy to discuss your project and help bring it to life.

Founders bring me Supabase backends and AI generated prototypes that work in demos but break under real users. I turn them into production systems with secure multi tenant RLS, working billing, clean migrations, and tests the next developer can trust. Recent client: "Rare at any price point." I specialize in the backend layer most full stack generalists avoid: multi tenant row level security, complex PostGIS schemas, and the production hardening that makes a codebase safe to hand to the next developer. I also run my own SaaS that processes 1M+ property listings nightly, so I build around founder constraints, not just engineering ideals. On my current education platform contract I act as technical lead across a multi contractor team: I make the schema calls, define the API contracts the other developers build against, and review their work before it ships. What I deliver: • Supabase and Postgres architecture. Migrations, triggers, RLS policies, schema cleanup, multi tenant isolation. • Stripe subscriptions. Webhooks, billing state sync, access control tied to subscription status. • Next.js App Router. Server actions, route handlers, API integration, frontend wiring. • AI features that ship. OpenAI and Claude integration, RAG pipelines, evals, guardrails. • PostGIS and spatial data. Location based schemas, GIS queries, Mapbox integration. • Team integration. I slot in alongside your existing developers, automation contractors, and vendors, and I review code as carefully as I write it. • Production handoff. Passing test suites, documented migrations, docs the next dev can follow. Recent Upwork work, all 5.0: • $9,550 fixed price production backend for a workforce analytics SaaS • Municipal GIS platform: 107 row level security policies enforcing per town isolation, Mapbox field mapping, Playwright test coverage. "Honestly one of the best freelancers I've worked with." • 72 table PostGIS schema with RLS on all 72 tables and 189 indexes, delivered ahead of deadline • Backend package: 18 SQL migrations, 14 Edge Functions, 257 passing SQL tests • Education platform, in progress: Stripe billing, Vimeo gated lessons, bulk school enrollment, technical lead across the client's contractor team Top Rated on Upwork. 5.0 across every contract. I'm best for founders who have a real product or a messy build and need it secure, scalable, and ready for customers. I work async by default: GitHub PRs with context, honest timelines, same day responses during working hours. Send a message and I'll reply within a few hours.