cat ~/resume
Choi Yeongjae
software engineer · CTO @ Actibooky Inc.
# experience
2026.03 - present Actibooky Inc. · CTO, Head of R&D Center
- R&D on on-device Korean sLM and web-based Vision AI
- Platform operations and cloud infrastructure (AWS, IaC)
- In-house LLM infrastructure and an AI-augmented development workflow
2019.01 - 2026.02 Lifluence · CEO, Software Engineer
- Founded and ran the company; built a blockchain-based supply chain tracing platform
- Built Cloudify, a SaaS platform for auth, attachments and notifications
2024.07 - 2025.01 Telos · CTO (part-time, advisory)
- Led development of the "Gominzoomin" service (infra, backend, frontend, Flutter app)
2021.01 - 2021.06 Sothecode · CTO (part-time, advisory)
- Built the dev team, led a water quality prediction service, PM for SI projects
2017.01 - 2018.08 Bujanongbu · CTO
- Company-wide infrastructure, backend and frontend development
2014.09 - 2018.04 Deepsearch · Senior Researcher
- NLP development and backend for financial data services
2013.07 - 2014.08 Bunjang · Senior Researcher
- Bunjang service, back office and service APIs
2008.03 - 2013.07 Cafe24 · Part Lead
- Led the e-commerce and hosting platforms and company-wide JavaScript development
2005.09 - 2007.08 Anyline · Engineer
- Web page builder framework
# activities
- First author, IETF Internet-Draft draft-aiendpoint-ai-discovery (2026 - )
- Startup mentoring and judging, university startup and development lectures
# education
2012 - 2014 Seoul Digital University · B.A. in Counseling Psychology
2001 - 2007 Chungbuk National University · Computer Science (did not complete)
# skills
LLM / sLM · QLoRA, TRL, Gemma, Qwen, ExecuTorch, Qualcomm Hexagon NPU, quantization
RAG / Voice · pgvector, multi-tenant retrieval, STT → sLM → TTS on device
Backend · Python (FastAPI), Go, PostgreSQL, MySQL, Redis, Kafka, Docker
Frontend · Next.js, React, TypeScript, Tailwind CSS, shadcn/ui
Infra · AWS, OpenTofu / Terraform, Supabase, Claude Code orchestration