Francis Ngigi

I am a senior full-stack software engineer with 5+ years building high-performance systems at AI startups and quantitative trading firms. I specialize in scalable APIs, distributed databases, and production systems that power large-scale ML and inference workloads.

At a Series B stealth AI startup I led the design and deployment of a distributed vector database supporting 500M+ embeddings with sub-10ms p99 latency and productionized 30+ REST and GraphQL APIs handling 50K+ QPS. I also drove a migration to partitioned and sharded PostgreSQL schemas that cut costs 68% while enabling 10× data growth.

Previously at a quantitative trading firm I developed high-throughput market-making systems in OCaml and Python, maintained 40TB+ time-series SQL schemas, and built internal APIs and trading bots. I am recognized for rigorous problem-solving, extreme attention to detail, and improving system reliability through strong review practices.

I mentor engineers, lead technical teams, and adopt productivity tooling such as coding agents to accelerate delivery. I am immediately available for high-impact sprints and open to contractor engagements with flexible payout terms.