From: South Korea
Location: Ansan-si, KR
On Useme since today
About me
Full-stack developer in South Korea (UTC+9), fully remote, working in English.
What I build: - Web apps end to end: Next.js, React, TypeScript, Node.js, Python (Django, FastAPI), PostgreSQL. - LLM integration: summarization, classification and extraction pipelines, RAG search, with caching and cost control. - Automation and data: web scraping, ETL pipelines, scheduled collectors, REST APIs, Docker, Kubernetes.
Background: full-stack engineer at a B2B SaaS company in Korea building high-availability failover software for enterprise clients (multi-node split-brain resolution, a legacy-to-Spring Boot + React migration). Also a stock-portfolio web app with real-time market data crawling on Kubernetes, two live services I run myself on Cloudflare Workers, and two commercial deliveries on a Korean freelance platform.
How I work: scope written down before code starts, short operations docs with every delivery, and I say upfront what I cannot honestly deliver.
Rate: from USD 60/hour (USD 80/hour for AI
Categories
CV / Résumé
Jan 2024 - Sep 2026
Full-Stack Engineer
B2B SaaS company (South Korea)
High-availability (HA) failover software for enterprise clients. Multi-node split-brain resolution logic, a legacy-to-Spring Boot + React migration, an OpenJDK security upgrade and an Apache Camel migration. Java, Spring Boot, React, TypeScript, Dock
Mar 2022 - Sep 2026
Freelance Developer
Freelance (independent)
Web and automation projects for small clients alongside study and employment: Next.js/React front ends, Python (Django, FastAPI) back ends, web scraping and ETL pipelines, LLM integrations. Two commercial deliveries on a Korean freelance platform.