Good fit

  • Senior / Staff engineer (IC) — Own features or modules: design, implementation, tests, deploy, and follow-up in production.
  • Tech lead without losing the keyboard — Set direction, review code, unblock the team, and still write meaningful patches.
  • Full-stack or backend-heavy — Especially Rails APIs, data modeling, background jobs, and performance work.
  • Product-minded teams — Where engineering talks to stakeholders and improves systems incrementally, not only greenfield rewrites.

Where I’ve added the most value

  • Billing and usage metering (Skylab), cargo scheduling platforms (Symphony Creative Solutions), high-traffic consumer products (ZIGExN VeNtura).
  • Modularizing domains with Rails Engines, tightening SQL and caching, and standing up deploy/monitor stacks from scratch.

Less ideal for me

  • Pure people-management with little technical contribution.
  • Roles that are only ticket-taking on a stack I can’t learn or influence.

Logistics — Based in Hồ Chí Minh City; open to hybrid or remote when collaboration and time zones work. English (intermediate) and Vietnamese (native) for day-to-day communication.