Oleksii I.

✅ Choose “𝐈𝐍𝐕𝐈𝐓𝐄” and send me the secret PROMO “𝐔𝐏𝐖𝐎𝐑𝐊” to receive a FREE With 40+ years of combined engineering experience and 870+ completed projects, I work as a Machine Learning Engineer, AI Engineer, MLOps Engineer, and Python Developer - delivering production-grade AI systems using Python, LangChain, LangGraph, RAG pipelines, LLM integrations, and full MLOps / DevOps infrastructure. I operate with a team of 90+ engineers across AI, Backend, and DevOps, serving US and European clients from prototype to production. Across 870+ projects and 40+ years of combined stack experience, our team has scaled AI systems to handle millions of requests daily - from RAG pipelines that replaced 3 full-time support agents, to LLM workflows that cut manual operations by 70%, to MLOps infrastructure that grew deployments from 1 to 120 per month. With 870+ projects behind us, I deliver end-to-end LLM integration using Python, GPT-4, GPT-5, Claude, LLaMA, and Mistral - including prompt engineering, context engineering, and embedding pipelines. Using LangChain and LangGraph, I build multi-agent AI systems where each agent handles retrieval, reasoning, and execution autonomously. Across 40+ years of combined AI development experience, we've shipped agent orchestration systems for fintech, healthcare, SaaS, and enterprise clients. I build RAG pipelines using Python, Weaviate, Chroma, semantic search, and knowledge retrieval systems integrated into production workflows - connected to PostgreSQL, MongoDB, CRMs, and internal knowledge bases. With 870+ completed projects, including dozens of RAG systems, one pipeline alone reduced support workload equivalent to 3 full-time employees, cutting response time from hours to seconds. I'M Full-Stack Developer with 9 years experience and 12 completed projects, specializing in scalable event platforms. 7 years full-stack experience, 18 projects delivered expert in Django + React SaaS solutions. 5 years building ticketing systems with 14 completed projects, experienced in payment integration and real-time inventory. 10 years full-stack development, 16 delivered projects ready for long-term SaaS partnerships and rapid MVPs. $4.6M+ client impact and $1.3M+ direct revenue across products developed with React, Next.js, and Node.js. 24,000+ active users across Web and Mobile platforms where React frontends and Node.js services increased user engagement by 21–30%. 13,500+ users across FinTech and payment products where Next.js improvements reduced reconciliation time by 43%. 2,900+ completed orders and 600+ registered customers on an eCommerce and CRM platform delivered with Next.js and Node.js. 92% faster order processing and 82% less manual work after workflow automation and backend optimization. 2,100+ catalog items, 5 user roles, and 3x higher operational capacity on SaaS Across 870+ completed projects with our 90+ engineer team, we've built and deployed Python-based LLM and RAG systems for Fintech (fraud detection, automated KYC, financial intelligence), Healthcare (HIPAA-compliant AI pipelines, patient data retrieval, clinical NLP), SaaS (AI copilots, agent workflows, automated onboarding), and Enterprise (internal knowledge bases, document intelligence, multi-agent orchestration with LangGraph and n8n). With 40+ years of cross-industry AI experience, we align every Python, FastAPI, Kafka, and Kubernetes decision to your business outcome not just the tech spec. 🔥 85+ completed projects (40+ SaaS & MVP platforms) delivered as a Full Stack Developer & React Developer 💰 Startup MVP platforms generated $500K+ revenue in their first 6 months 👥 SaaS products supporting 10K–50K active users built by an expert Full Stack Developer 📈 One platform grew from 2K to 7K users through continuous product updates by a Web Developer ⚡ Backend systems processing 300K–500K A 🧰 Core tech stack (used where it fits, not by default) Frontend: React, Next.js, TypeScript, HTML5, CSS Backend: Node.js, Python (FastAPI, Flask, Django) APIs: REST API, GraphQL, Webhooks Databases: PostgreSQL, MongoDB, Redis, SQLite Cloud & DevOps: AWS, Azure, GCP, Docker, CI/CD Architecture: SaaS development, API-first design, clean code My core stack includes Python, Python Django, Django 👋 Whether as Python Full Stack Developer to ship a production-grade web app, a Python Developer AWS to deploy scalable microservices, a Python Full Stack Developer Flask expert to build modern backend-driven applications, or a Python AI Developer to wire up intelligent automations I deliver clean, reliable, maintainable solutions that solve real problems. If you're also searching for a solid web developer, full-stack developer I bring the same professional skills + 5 work with Web development 📩 Send me a message with your current setup - I'll tell you what's missing, what can be improved, and whether your AI system is ready for production.