Toan Le
Senior full-stack product engineer · technical lead · Ho Chi Minh City, Vietnam
I build production systems that have to keep working after launch. That usually means product engineering, architecture, database design, workflow logic, and the operational details that decide whether software stays useful.
I have 10+ years of software engineering experience, around seven of them in professional Ruby on Rails. I also work in Go and TypeScript, with PostgreSQL, Elasticsearch, ClickHouse and TimescaleDB for data, and AWS, Kubernetes and Cloudflare for running it. The full list is on /uses.
What I care about
- clear boundaries and sane data models;
- search and analytics that stay usable as data grows;
- automation that sends people the exceptions, not everything;
- trade-offs written down clearly enough for the next engineer.
That's why my work keeps coming back to workflow-heavy products: they're where the real architecture decisions show up.
Selected work
- Elasticsearch for search, ClickHouse for analytics — solo-built B2B search platform
- Reputation scoring over 64 million wallets — Octan Network
- Moving parts of a Rails monolith to Go — JobReady, team of 5–7
- An AI-first OCR pipeline — Cloudflare Workers
Shorter, unfinished thinking lives in the garden. What I'm doing right now is on /now.
git log --format="%ad %s" career
- Oct 2025 – Oct 2026Full-stack engineer, solo product · A B2B search platform
- Jan 2025 – Jul 2025Full-stack engineer · Aitbase (Omnichannel)
- Sep 2022 – Jan 2025Blockchain developer · Octan Network
- Jan 2022 – Jan 2024Tech lead · FPT Blockchain Lab
- Oct 2019 – May 2021Software engineer · ReadyTech
- Jul 2017 – Oct 2019Technical leader · JobReady
- Nov 2014 – Oct 2019Ruby developer · JobReady
- Jan 2012 – Jan 2014Freelance full-stack developer · Web apps, DevOps, IoT
Some dates overlap; they're listed as they appear in my CV. The B2B search platform is anonymised on purpose.
Get in touch
I'm open to senior product engineering and technical lead roles, and to consulting on architecture, data-heavy systems and AI workflows. If you're building something like that, send me the real problem: what you're building, where it's breaking down, and what help you need.
info@imtoanle.com · GitHub · RSS: posts, til