BEOMSEOK KIM
Backend Engineer
Backend engineer with ~4 years across B2B SaaS and DX projects — owning requirements, design, implementation, and operation. Centered on API/DB design, with hands-on ERP integration, infra migration, and OCR/AI pipeline work. I fold AI into existing systems to create real business value, not for its own sake.
Experience
Backend Engineer · Livit
2023.04 – present- Enterprise ESG (LCA) data platform for a large petrochemical manufacturer: backend + ERP (SAP) integration interfaces, data-spec definition, and server coordination with the client's infra team.
- AI-powered OCR extraction pipeline: fed two OCR APIs' confidence/diffs into an AI correction-and-adjudication layer; cut processing cost from ~5–6¢ to ~2–3¢ per item (~55%).
- Monorepo migration, infra & DB migrations (MySQL→PostgreSQL/Supabase, LightSail→Vercel/Railway), a Redis caching strategy for dashboard aggregation, and Selenium-based data-collection automation.
- Zero-to-one carbon-emission SaaS: NestJS REST APIs, JWT/role-based auth, and AWS infrastructure & operations.
Skills
TypeScript · Node.js · NestJS · Next.js · GraphQL · React · MySQL · PostgreSQL · MSSQL · Redis · AWS · Vercel · Supabase · Docker · Linux · LangGraph · Claude Code
Languages
Korean (Native) · Japanese (JLPT N1) · English (TOEIC 825)
A full Japanese 職務経歴書 is available as a PDF ↗.