Backend Developer with 3+ years of experience building and operating production backend systems — from enterprise internal platforms serving 500+ employees and 4,500+ customers, to a self-driven microservices rebuild using Go, Kafka, and Kubernetes.
- 🔭 Currently building backend services for an insurance claims (TPA) platform at Fullerton Health
- 🌱 Deepening: distributed systems & SRE practices, advanced DevOps (service mesh, progressive delivery), AI agentic workflows in the dev lifecycle
- 🗣️ TOEIC 825 — comfortable working in English with cross-functional/international teams
- 📄 Portfolio & CV: trannhatsang.online
- 📫 Reach me: trannhatsang.work@gmail.com
Backend
Database
Architecture & Messaging
DevOps / Infra
Also comfortable with
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Backend Developer · Fullerton Health — 01/2025 – Present Building and operating backend services for TPA (Third-Party Administrator) insurance claims platforms across Vietnam and Singapore. Stack: NestJS, Golang, NATS JetStream, MySQL/MariaDB, MongoDB, Redis, Keycloak, Grafana. Work directly with Singapore-based BAs and cross-functional QA/Frontend teams in English.
Fullstack Developer · Apetechs Solution JSC — 09/2023 – 11/2024 Delivered 7 enterprise modules across multiple clients in 14 months — including an HRM platform spanning 5 companies, 60+ branches and 500+ employees (scheduling, timekeeping, recruitment, RBAC), plus room/fleet management and procurement systems. Stack: Angular, NestJS, MySQL.
| Project | Description | Stack |
|---|---|---|
| Football Booking — Production Rebuild | Personal microservices rebuild of a stadium-booking platform (9 repos) to practice production-grade distributed systems: event-driven pipelines, API gateway, self-managed K3s, GitOps deploys | NestJS · Go · FastAPI · Kafka · Kubernetes (K3s) · ArgoCD |
| Football Booking — Graduation Thesis | Stadium-booking platform with an AI chatbot (RAG) for venue recommendations, built as a 5-repo team project | NestJS · FastAPI · Next.js · Kafka · Keycloak · PostgreSQL |
| HRM System | Enterprise HR platform: scheduling, timekeeping, recruitment, RBAC | Angular · NestJS · MySQL |
| E-Learning Platform | Course marketplace with purchase flow, progress tracking, and sales/analytics reporting | React (Redux) · Node.js · MongoDB |
More projects on my portfolio page →
- University of Information Technology (UIT), VNU-HCM — B.Eng in Information Technology
- FPT Polytechnic — Bachelor Practical Degree, Website Development (GPA 9.4/10)
- Two-time Top 1 Best Student (Summer 2022, Summer 2023)
- Top 4, FPT Edu Hackathon 2022 (Blockchain track) — led a 4-member team through 3 rounds
No pain, no gain. Never stop learning.