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aaron219200

Aaron Hoang

@aaron219200

Backend Engineer for Nodejs NestJS APIs and Cloud

Vietnam
Vietnamese, English
About me
Backend engineer, 4+ years with Node.js, NestJS and Ruby on Rails on GCP and AWS. Right now I keep a live booking platform stable at around 10,000 concurrent users: Redis caching, SQL query tuning, and a database-level fix for double-booking. I have also led a backend team of 5 on a microservices platform, and shipped Stripe, PayPay and Fincode payments. Best fit for: new REST or GraphQL APIs, fixing slow or broken Node.js backends, payment gateways, Cloud Run and AWS deployment. Send me your repo or error log and I will tell you honestly if I can help.... Read more

Skills

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aaron219200
Aaron Hoang
Offline • 
Average response time: 1 hour

See my services

API & Integrations
I will build a production ready rest api backend with nodejs and nestjs
From$45 / projectMore details
Bug Fixes
I will fix and optimize your slow nodejs api and sql database queries
From$35 / projectMore details

Portfolio

Work experience

Self_Employed

Self Employed

Full-time • 5 yrs 11 mos

Backend Team Lead

Jul 2024 - Present • 2 yrs 2 mos

Led a backend team of 5 engineers building a microservices parking and contract management platform using NestJS, Hasura GraphQL, GCP and AWS. Integrated Fincode payment processing and CloudSign contract management. Conducted code reviews, managed deployments, and coordinated with stakeholders.

Backend Team Lead

Jul 2023 - Feb 2025 • 1 yr 7 mos

Led backend team of 2 on a building management system using Node.js, TypeScript, GCP and AWS. Integrated Stripe and PayPay payment services. Deployed with Cloud Build and Cloud Run, worked with Firestore and BigQuery.

Backend Developer

May 2022 - Jul 2024 • 2 yrs 2 mos

Sole backend developer for a Learning Management System built on Ruby on Rails and AWS. Owned full backend lifecycle including feature development, unit testing, SQL optimization, and CI/CD maintenance.