Hello, I Am Bek

• Building production RAG pipelines, LLM orchestration, and AI SaaS features for Korean product teams and remote clients.
• Designed multi-provider LLM failover and retrieval evaluation loops with LangChain, FastAPI, and Python — cutting hallucination-related support issues by ~30%.
• Shipped end-to-end AI product surfaces in Next.js with streaming responses and grounded citations, improving answer relevance for internal knowledge search.
• Owned the full AI delivery loop — data prep, API design, prompt iteration, and production monitoring — reducing feature turnaround from weeks to days.

Python · FastAPI · Next.js · RAG · LLM · LangChain · PHP

• Built high-performance web apps and modular APIs with NestJS, Next.js, and GraphQL — improving load speed by 35% and strengthening architecture scalability.
• Implemented custom interceptors, guards, and JWT/OAuth 2.0 auth workflows — reducing unauthorized access risk in enterprise environments by 40%.
• Accelerated multi-environment and GCP deployments by 25% with Docker and Nginx reverse proxy, reaching 99.9% server uptime.
• Integrated AI/LLM developer tools into Git/GitHub workflows — keeping code quality high while improving feature delivery speed by 30%.

NestJS · Next.js · GraphQL · Docker · GCP

• Collaborated closely with designers and backend engineers to improve data integration stability and significantly enhance UX.
• Converted Figma design systems into scalable reusable React components — improving UI consistency and productivity by over 25%.
• Refactored and optimized complex B2B SaaS codebases — improving readability and application performance by 20%.
• Led Agile delivery of user feedback and business requirements into stable product features — accelerating sprint delivery by 15%.

React · Figma · TypeScript