Full-stack web developer with 5+ years of experience in Angular and .NET, delivering scalable applications with REST APIs and cloud deployment (Azure, AWS). Passionate about clean code, performance optimization, and reliable solutions. Experienced in mentoring junior developers and contributing to both venture-backed startups and long-term US enterprise SaaS projects.
Stuff I have done lately
Experiences
Mercu
Software Engineer
May 2024 - 2025 (1 year)Remote
- Partnered closely with founders and team to design and launch a scalable, AI-powered hiring platform with full cross-browser support.
- Delivered a full-stack video and audio interview module enhanced by OpenAI-based transcription and AI-driven candidate scoring.
- Engineered a media compression pipeline using AWS Lambda, FFmpeg, and S3 to streamline upload performance and reduce storage overhead.
Simplify Dalat - US Client: Impartner
Full-Stack Developer
October 2022 - May 2024 (1 year 8 months)Lam Dong, VN
- Led the initial refactor of a large Angular monorepo, coordinating 3 junior developers through the first rollout; introduced NgRx/@ngrx/component-store and push-based patterns to stabilize state and speed iteration.
- Partnered with the principal architect to define and apply a consistent frontend architecture across 4 projects.
- Built reusable UI libraries, resolved memory leaks, and optimized heavy bindings → improved load time and long-session stability on enterprise portals.
- Contributed to .NET Core services on Azure (MSSQL, MongoDB); tuned Azure Service Bus handling to reduce DB load from noisy events.
- Drove mentoring for 3 juniors (pairing, review checklists, targeted tasks) → faster PR turnaround and fewer regressions.
Junior Software Engineer
January 2021 - October 2022 (1 year 10 months)Lam Dong, VN
- Created reusable UI components and maintained frontend architecture, improving dev speed and consistency across 4 projects.
- Developed backend services using .NET Core and integrated databases.
- Wrote Postman integration tests to ensure backend service reliability.
B-Gate Solutions
Back-End Developer
May 2020 - November 2020 (7 months)Lam Dong, VN
- Developed CRM web applications using .NET MVC and Entity Framework integrated with MSSQL databases.
Projects
Moninote — Notes-first personal finance app
Notes-first finance app — tracks subscriptions and daily expenses as structured notes with reminders and multi-currency support.
Core features: recurring payments, Bull + Redis scheduling, FX conversion, and LLM-powered natural language expense parsing and categorization (English + Vietnamese).
Technologies:
+ Node.js/Express for backend API
+ MongoDB Atlas for database
+ Angular for frontend
+ Redis for caching and scheduling
+ Docker for containerization
+ AWS for cloud deployment
Libra Kitchen - Coffee shop website
Developed the official website for a local café in Đà Lạt, serving real customers with pastries, beverages, and daily specials.
Built with MongoDB, Angular Universal, and Node.js to enable SEO-friendly pages, dynamic menu updates, and smooth browsing across devices.
Delivered a production-ready site that supports the café's online presence and marketing efforts.
Varundef.com (Blog & Portfolio)
A personal blog and portfolio site for sharing about modern web development and career growth.
Built with Next.js and Notion CMS, deployed on Vercel.
Technologies:
+ Next.js for the frontend framework
+ Notion as the headless CMS
+ Vercel for deployment
+ Tailwind CSS for styling
Course Management System
A course management system is a study project that implements basic CRUD operations & JWT authentication, built with Angular, .NET, MySQL and containerized by Docker.