Justin Lee
Founding Engineer at Alex AI
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolJustin Lee is a founding engineer and full-stack developer with eight years of experience building real-time conversational voice AI, vector search, and scalable data pipelines from San Francisco. At Alex he architects low-latency STT/TTS orchestration, vector-embedded RAG services, and LLM enrichment workflows that turn raw transcripts and resumes into actionable signals. He combines frontend polish (TypeScript, React/Next.js) with robust backend systems in Node, Python and Go, and operationalizes them across cloud, serverless, and container platforms. Prior roles show a knack for high-performance real-time apps and data-heavy UX—whether a multi-user WASM-powered canvas or a video-call productivity product for neurodivergent users. Justin’s background in mechanical and aerospace engineering informs his systems thinking and pragmatic prototyping, and outside work he builds modern wood furniture, reflecting a blend of precision and craft. He’s equally comfortable shaping ambiguous product goals into clean data models, infra, and delightful user experiences.
8 years of coding experience
10 years of employment as a software developer
Bachelor of Science - BS, Mechanical Engineering, Bachelor of Science - BS, Mechanical Engineering at University of California, BerkeleyMaster of Science - MS, Aerospace Engineering, Master of Science - MS, Aerospace Engineering at Purdue University
English, KoreanGithub contributions (5)
plumsily/f1-new-tab
Sep 2022 - Jan 2023
Contributions:74 commits, 70 pushes, 2 branches in 4 months
plumsily/random-quote-machine
Jun 2022 - Oct 2022
Contributions:41 commits, 36 pushes, 2 branches in 3 months
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