I ship production AI systems — solo, end-to-end.

Senior AI & Full-Stack Engineer

Altong · Seoul, South Korea

Multilingual Q&A and content community serving users in five languages.

• Built the AI assistant end to end — SSE token streaming, multi-turn memory and per-turn language matching — isolated behind its own thread pool so the main platform stays unaffected under load.
• Designed atomic Redis quota guards (burst, daily and global spend limits) with signed guest cookies to keep LLM cost predictable.
• Shipped voice input with Whisper speech-to-text and a two-stage content language detector that replaced an unreliable single-pass approach.
• Work spans Next.js and TypeScript on the frontend through Java 17, Spring Boot, MyBatis and sharded MySQL on the backend.

Senior Full-Stack Engineer

NOMAD · Remote (US client)

Built staticengine.com, an AI image and ad-creative generation platform.

• Architected a NestJS + PostgreSQL backend with BullMQ job queues and multi-provider AI/LLM integration (OpenAI, Anthropic, Gemini).
• Built Stripe credit billing and the Next.js dashboard.
• Integrated Meta Ads and Shopify; delivered 420+ contract hours with a 5-star client review.

Full-Stack Engineer

Neuracode · Remote

Distributed team of 10–20 worldwide.

• Led backend for production systems with Node.js, NestJS and TypeScript — REST and GraphQL APIs used by real users.
• Built real-time features with WebSockets and secured access with JWT and role-based authentication.
• Containerised and deployed services with Docker and NGINX on Linux.

Full-Stack Developer

T Brick Soft · Tashkent, Uzbekistan

• Built and maintained production web apps with React, TypeScript and Node.js for international clients.
• Designed scalable REST APIs and optimised DB queries with caching — ~40% faster responses.