Senior Backend Engineer · 7 years · Hanoi, VN
I don't just write code. I design technical solutions that fit real business problems — from insurance platforms managing tens of thousands of contracts to trading systems processing a thousand orders per second.
Accepting projects for Q2 2026
Worked with
Services
For: Startups shipping fast · SMEs adding new capability
You have a product idea and need someone to turn it into a real, running system — stable, scalable, not something you'll have to rebuild in a year.
For: Businesses running production with performance issues
Users complain it's slow, the system crashes occasionally, your team can't find the root cause — I diagnose and fix.
For: Founders / CEOs needing an outside engineering view
Considering a big technical investment, or unsure if your tech team is going the right way — you get an honest perspective with no solution to sell.
For: Teams deploying manually — slow and error-prone
Every release is a stressful event — I help you automate until deploys are boring (in a good way).
Process
I spend 1–2 sessions understanding your actual problem — not just the surface-level technical ask.
I send a concrete scope, timeline, and cost. No hidden fees, no scope creep surprises.
Frequent progress updates. You always know where things are — without having to ask.
Code, docs, operations guide. Two weeks of free support after handover if anything comes up.
Results
Finance · Insurance
Insurance management platform serving tens of thousands of policies — after architecture and database tuning, business throughput rose 40% and production errors fell 35%.
High-frequency trading
Financial exchange demanding very low latency — system handles 1,000 orders/second at sub-50ms p99, stable across months of continuous production load.
Legacy modernization
Multi-year-old data management system needed modernizing — full architectural migration completed with zero downtime, incident detection time cut in half.
Automation & CI/CD
Manual release process used to consume hours per cut — after introducing automated pipelines, release effort dropped 50% and deploy-induced incidents fell significantly.
Demo project
A real demo, built from scratch to show backend craft.
Real-time hospital queue: patients book online, check in, see their queue position with predicted ETA; doctors call next and record consultations; admin exports monthly Excel reports. All updates pushed via WebSocket in under 500ms.
Tech stack
Contact
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