Software Engineer

Full Stack / Backend Engineer with 2+ years of experience building high-traffic products (3M+ users) using Node.js and Go, with strong focus on performance, reliability, and security. Experienced in designing RESTful APIs, real-time data processing, and payment integrations (Momo, ZaloPay, VNPay), as well as messaging platforms like Zalo OA and FCM. Seeking to contribute to product teams building scalable, low-latency backend services and user-friendly applications.

Currently working at Intelin (ST Group) on system operations and ZMP (Zalo Mini App) product development.

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Experiences

Intelin Technology Joint Stock Company (ST Group)

Fullstack Developer (Node.js Focus) @ Fulltime

Jul 2022 - Present

Work Description:

Developed and maintained web & mobile applications serving 3M+ users, focusing on performance and reliability.

Built VeloQR, a high-performance React QR code scanner library using WebAssembly and Rust to optimize scanning speed.

Designed and optimized RESTful APIs (Node.js) and services in Go, reducing average response time / improving throughput.

Implemented responsive UI/UX in React.js & React Native to ensure consistent experience across web and mobile.

Integrated multiple payment gateways (Momo, ZaloPay, VNPay, …) to support seamless online transactions.

Built Zalo OA integrations (notifications, chatbot, login) to automate billing reminders and improve customer engagement.

Implemented real‑time data processing and security (JWT, OAuth2, AES encryption) for safer, faster user interactions.

Deployed and managed services on VPS, monitoring uptime to 99.99% using PM2, Docker, Grafana, and other tools.

GEEK Up

Summer Internship (Node.js Developer) @ Internship

Jun 2021 - Sep 2021

Work Description:

Developed a local branch management system (inventory, orders, payments) as a Node.js / NestJS backend service.

Designed RESTful APIs and optimized PostgreSQL queries, reducing DB load by ~30%

Built React.js + Tailwind CSS UI and integrated JWT/OAuth2 authentication.

Deployed on AWS using Docker & CI/CD pipelines for smooth, automated releases.

Pet Projects

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Custos

Network Guardian: Monitors and filters local network traffic.
Architecture: Built with Wails (Go backend + React frontend). Main modules: Traffic Interceptor, Policy Engine, Update Service.
Challenges: Handling high-throughput traffic with low latency across Windows/Linux.

#Go#Wails#React#TypeScript#Desktop App#Network Security#Open Source

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Go Zalo Bot SDK

Comprehensive Go SDK for building Zalo Bot applications.
Architecture: Modular design with separate packages for Auth, Webhook, and Messaging API.
Key Features: Robust event handling, helper utilities for rich media, and automatic token refresh.

#Go#Zalo Bot#SDK#Webhooks#Authentication#Open Source

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