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Hi there! I’m Nazar Borbelyuk, a Senior Software Engineer with 13 years of hands-on experience building AI/LLM systems, mobile and web applications, and blockchain solutions. I enjoy turning complex ideas into secure, high-performance software and collaborating with cross-functional teams to deliver scalable, user-friendly products. I thrive in solving tough technical challenges, from API design and cloud-native architectures to intelligent agents, RAG pipelines, and smart contract integrations. My focus is on delivering production-grade solutions that align with business goals while maintaining robust security and performance.…Hi there! I’m Nazar Borbelyuk, a Senior Software Engineer with 13 years of hands-on experience building AI/LLM systems, mobile and web applications, and blockchain solutions. I enjoy turning complex ideas into secure, high-performance software and collaborating with cross-functional teams to deliver scalable, user-friendly products. I thrive in solving tough technical challenges, from API design and cloud-native architectures to intelligent agents, RAG pipelines, and smart contract integrations. My focus is on delivering production-grade solutions that align with business goals while maintaining robust security and performance.

Nazar Borbelyuk

Full Stack Developer, Web Developer, AI Developer, +2

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Hi there! I’m Nazar Borbelyuk, a Senior Software Engineer with 13 years of hands-on experience building AI/LLM systems, mobile and web applications, and blockchain solutions. I enjoy turning complex ideas into secure, high-performance software and collaborating with cross-functional teams to deliver scalable, user-friendly products. I thrive in solving tough technical challenges, from API design and cloud-native architectures to intelligent agents, RAG pipelines, and smart contract integrations. My focus is on delivering production-grade solutions that align with business goals while maintaining robust security and performance.…Hi there! I’m Nazar Borbelyuk, a Senior Software Engineer with 13 years of hands-on experience building AI/LLM systems, mobile and web applications, and blockchain solutions. I enjoy turning complex ideas into secure, high-performance software and collaborating with cross-functional teams to deliver scalable, user-friendly products. I thrive in solving tough technical challenges, from API design and cloud-native architectures to intelligent agents, RAG pipelines, and smart contract integrations. My focus is on delivering production-grade solutions that align with business goals while maintaining robust security and performance.

Available to hire

Hi there! I’m Nazar Borbelyuk, a Senior Software Engineer with 13 years of hands-on experience building AI/LLM systems, mobile and web applications, and blockchain solutions. I enjoy turning complex ideas into secure, high-performance software and collaborating with cross-functional teams to deliver scalable, user-friendly products.

I thrive in solving tough technical challenges, from API design and cloud-native architectures to intelligent agents, RAG pipelines, and smart contract integrations. My focus is on delivering production-grade solutions that align with business goals while maintaining robust security and performance.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Work Experience

AI Software Developer at Self Employed

December 1, 2025 - Present

Designed and developed AI-driven automation solutions for mortgage lending; integrated OpenAI APIs, Google Document AI, and LangChain APIs to enhance automated email responses and lead management.

AI Software Developer at HatchWorks AI

May 1, 2022 - November 1, 2025

Led API development with Node.js and Python; designed and implemented Retrieval-Augmented Generation (RAG) pipelines using FAISS/Pinecone/Chroma; built LLM-powered agents for financial reasoning, sentiment analysis, and knowledge extraction; integrated OpenAI/Hugging Face/Local LLMs; implemented document ingestion, chunking, embedding, and semantic search workflows; optimized prompts, context windows, latency-cost tradeoffs; implemented micro-service architecture using RabbitMQ, Kafka, Docker and Kubernetes; reduced server costs by 30%; developed intelligent chatbots and enhanced customer service.

Full-stack Developer at Cello

October 1, 2016 - March 1, 2022

Designed robust back-end architectures and APIs with Node and Python; achieved 99.9% system uptime and increased transaction handling efficiency by 50%; revamped MySQL databases; developed front-end projects with React and Vue; built 10+ cross-platform mobile apps with React Native and Flutter; developed and integrated smart contracts for decentralized applications (dApps); built Web3 frontends with ethers.js/web3.js; automated build processes with npm; unit tests with Jest/Mocha; UI tests with RTL.

Full-stack Developer at Maven

November 1, 2013 - April 1, 2016

Developed and maintained eCommerce, SaaS, CRM, healthcare, real estate, rental, financial, and social networking applications using PHP/Laravel, Node, JavaScript/TypeScript, Vue, and React; optimized database schemas (MySQL/PostgreSQL) and queries; secured sensitive data with AES-256 encryption and TDE; implemented 100+ unit and integration tests; modernized frontend with React/TypeScript; collaborated in agile environments.