Open to opportunities

Chen Nì Nguyen

@chennnguyen

Message

I build reliable backend systems for commerce, operations, fintech, and networking.

Vietnam

Message

What I'm looking for

I'm looking to build and own reliable backend or systems products where I can solve ambiguous operational problems, improve reliability, and take work from design through production.

I've built and owned production backend systems since 2020, most recently as the sole backend engineer for Manjam Global's seller-focused commerce platform. I designed its backend, Angular admin surface, deployment, monitoring, and operational workflows for catalog, orders, payments, vouchers, shipping, and fulfillment.

At Ionha Jonstock, I delivered a multi-stage warehouse transfer platform with barcode-level traceability, auditability, access control, and event-driven workflows using NestJS, MongoDB, Redis, RabbitMQ, and WebSockets. At Devbase and ThaTek, I shipped backend services across fintech, e-commerce, livestreaming, and an early-stage startup product.

I've also maintained Rust/Tokio networking systems at U2U Networking, building QUIC/TCP and SOCKS5 capabilities, health checks, recovery behavior, and debugging tools for long-running mobile connectivity. I enjoy turning ambiguous operational requirements into dependable systems that teams can run and evolve.

Experience

Work history, roles, and key accomplishments

Current

Backend Engineer

Current

Freelance

Mar 2026 - Present (5 months)

Sole backend engineer and system owner for Manjam Global, a seller-focused commerce platform. Introduced an indexed, denormalized read model for faster complex filtering and built the Angular admin surface and backend APIs.

NestJS Angular MongoDB Redis PostgreSQL Docker Coolify

Software Engineer

U2U Networking

Mar 2025 - Sep 2025 (6 months)

Maintained a mobile-support networking daemon using QUIC/TCP to reduce latency and support long-running client connectivity. Implemented a SOCKS5 proxy pipeline and improved daemon stability with health checks and recovery mechanisms.

Rust Tokio TCP Quic AWS PostgreSQL

Full Stack Developer

Ionha Jonstock Company

Sep 2023 - Mar 2025 (1 year 6 months)

Owned end-to-end delivery of a multi-stage warehouse transfer system, eliminating paper-based processes with barcode-level item traceability. Built admin interfaces and backend APIs for unified transfer status and access control.

NestJS MongoDB Redis RabbitMQ

Backend Developer

Devbase Company

Mar 2022 - Sep 2023 (1 year 6 months)

Delivered backend services across fintech, e-commerce, and livestreaming client projects in an outsourcing environment. Collaborated with frontend teams and resolved production issues to support stable releases.

NestJS MongoDB PostgreSQL Redis AWS CDN

Full Stack Developer

ThaTek Company

Nov 2020 - Mar 2022 (1 year 4 months)

Early engineer on TryMe, contributing to core product backend from initial build through two years of production operation. Delivered customer-facing APIs, async processing workflows, and media handling features.

NestJS MongoDB RabbitMQ Redis AWS FFMPEG