Senior Backend Engineer · Remote

I build backend systems that stay up under real traffic.

10+ years shipping Node.js and NestJS platforms for 1,000+ concurrent users — API design, message queues, AI integrations, and payment automation, end to end.

View case studies → Download résumé
  • Open to remote contract & full-time roles
  • Async-first, written-communication friendly
  • Based in Vietnam · GMT+7
career --status
experience10+ years
peak_concurrency1,000+ users
production_platforms20+ deployments
core_stackNode.js / NestJS
specialtiesQueues · AI · Payments
MySQLPostgreSQLRedisRabbitMQBullMQAWSDocker
AVAILABLE FOR REMOTE WORK
Node.js · NestJS · Express PostgreSQL · MySQL · MongoDB · DynamoDB Redis · RabbitMQ · BullMQ · SQS AWS · Docker · Serverless LLM Integrations · Telegram Bot API TRC20 · Payment Gateways Node.js · NestJS · Express PostgreSQL · MySQL · MongoDB · DynamoDB Redis · RabbitMQ · BullMQ · SQS AWS · Docker · Serverless LLM Integrations · Telegram Bot API TRC20 · Payment Gateways
About

Backend-focused, full-stack when it counts.

I'm Khaing Min Tun, a backend engineer based in Vietnam, working async-first with international teams. Over the last 10+ years I've moved from full-stack development into a backend specialization — designing APIs, databases, and background-job pipelines that hold up under high concurrency.

More recently I've shipped AI-powered assistants, Telegram automation, and TRC20 crypto payment flows for production systems. I also have hands-on mobile experience — 2 years of Swift/iOS and 1+ year of React Native — so I can support a mobile team when a project calls for it, but backend systems are where I do my best work.

That specialization sits on top of 20+ full-stack projects delivered earlier in my career — PHP/Laravel, Vue, Angular, GraphQL, Firebase, DynamoDB, Stripe, and WordPress among them. I don't lead with that range day to day, but it's still there whenever a team needs someone who can move fast across the whole stack.

I prefer remote, async-first roles: written communication over calls, clear tickets over ambiguity, and ownership over a feature end to end.

10+Years of professional software engineering experience
1000+Concurrent users served on a single production platform
20+Real-time, high-concurrency platforms built & maintained
7Integrated systems in one enterprise platform I own the backend for
20+Full-stack projects shipped across PHP, Vue, Angular, React & more
How I build

How a request moves through my systems

A simplified view of the pattern I reach for on high-concurrency APIs: requests are validated fast at the gateway, heavy work is pushed onto a queue, and the response returns quickly while a worker finishes the job in the background.

Client API Gateway NestJS · auth Queue RabbitMQ / BullMQ Worker background job DB + Cache Postgres · Redis Fast response returned to client immediately
01 · GatewayValidate, authenticate, and rate-limit the request before it touches anything expensive.
02 · QueuePush slow or bursty work onto RabbitMQ / BullMQ instead of blocking the request.
03 · WorkerProcess the job, read/write Postgres and Redis, retry safely on failure.
04 · ResponseThe client gets a fast reply; results land via webhook, socket, or polling.
Selected work

Case studies

A few of the production systems I've designed and shipped. Client and product names are kept generic where work was delivered under NDA.

Platform

Enterprise all-in-one business platform

ChallengeOne client platform needed to run 7 integrated systems — e-commerce, document management, an online shop, and more — for 1,000+ concurrent users without slowing down.
ApproachDesigned REST APIs and database schemas in NestJS, moved heavy operations onto Redis and RabbitMQ/BullMQ queues, and used Aurora/PostgreSQL for storage.
OutcomeStable response times under high concurrency, with unit and E2E tests running in CI.
NestJSAurora/PostgreSQLRedisRabbitMQBullMQ
Automation

AI inventory assistant & Telegram automation

ChallengeBusiness teams needed fast answers from operational data, and several transaction workflows still ran manually.
ApproachBuilt an LLM-integrated assistant that queries business data and answers in natural language, plus production Telegram bots covering nearly the full Bot API for day-to-day automation.
OutcomeFaster answers for non-technical staff, and automated workflows that are still running in production today.
LLM IntegrationTelegram Bot APINode.jsAutomation
Integration

Payments & third-party infrastructure

ChallengeMultiple products needed reliable SMS, email, and payment infrastructure without building it themselves.
ApproachBuilt and operate production integrations for SMS/email delivery and Myanmar payment gateways, plus TRC20 crypto top-up and exchange automation.
OutcomeShared infrastructure now used as a dependable backend service by other applications.
TRC20Payment GatewaysSMS/Email APIs
Platform

High-throughput transaction platforms

Challenge20+ real-time, high-concurrency platforms needed strict uptime and data-integrity guarantees under concurrent load.
ApproachImplemented queue-based processing and caching layers purpose-built to keep each system stable under load.
OutcomeMultiple production deployments running today, each meeting strict uptime requirements.
Real-time SystemsRedisQueues
Extended portfolio

More shipped work

Alongside the flagship case studies above, here's a slice of 20+ production projects delivered earlier in my career — the range that still shows up whenever a job needs someone comfortable moving across the stack.

01

Tohshin — iOS, Android & Web

Messaging, keyboard handling, and image/PDF sharing across mobile and web clients for the same product.

React NativePHP 8RubyFirebase
02

Evort CMS

Data dashboard with Firebase auth, pagination, media upload, and Google Cloud Functions.

PythonNext.jsFlaskFirebase
03

Aw-Shikoku-Kensetsu-Center

Admin dashboard + customer site on a custom REST API, built on a headless CMS.

Node.jsAngularJSStrapiMySQL
04

Yoma Connect Console

Workplace-style feeds, notifications, and conversations with live chat and video calling.

Vue.jsNuxt.jsGraphQLGetStreamJitsi
05

HMO — Order Platform

Database design through order confirmation, with PDF export and full authentication.

Node.jsPHPLaravelNuxt.jsMySQL
06

GiConnect — API + Console

Billing console with Stripe subscriptions, invoice generation, and admin user management.

ServerlessVue.jsDynamoDBStripe
07

Ask CUI — API + Console

Social aggregator pulling trending posts, photos, and videos across four platform APIs.

TypeScriptExpressTwitter/FB/IG/YouTube APIs
08

Faceshoot — Mobile

Camera-based face recognition app that delivers recorded video via LINE Official Account.

IonicNode.jsFaceAPILINE API
Toolbox

Skills & stack

Backend-first today, with 10+ years of full-stack range underneath it — the complete set I actually reach for in production.

BE

Backend languages & frameworks

  • Node.js
  • NestJS
  • Express.js
  • PHP 8
  • Laravel
  • CodeIgniter
  • Python
  • Flask
  • Ruby
FE

Frontend & mobile

  • React.js
  • Next.js
  • Vue.js
  • Nuxt.js
  • Angular
  • React Native
  • Swift / iOS
  • Ionic
  • Bootstrap
DB

Databases

  • PostgreSQL
  • MySQL
  • MongoDB
  • DynamoDB
  • Firebase / Firestore
  • Oracle
RT

Messaging & real-time

  • RabbitMQ
  • BullMQ
  • Amazon SQS
  • WebSockets
  • GraphQL Subscriptions
  • GetStream
  • Jitsi
OP

Cloud & DevOps

  • AWS (Lambda, API GW, EC2, S3, Aurora)
  • Google App Engine
  • Serverless Framework
  • Docker
  • Heroku
  • Vercel
  • Digital Ocean
QA

Testing & QA

  • Jest
  • Playwright
  • Cypress
  • PyTest
  • Unit & E2E testing
  • GitHub Actions CI
$

Payments & billing

  • Stripe
  • TRC20 crypto top-up & exchange
  • Myanmar payment gateways
  • SMS & email provider integration
AI

AI & automation

  • LLM-based chat & inventory assistants
  • Telegram Bot API (full feature set)
  • Workflow automation
API

Third-party APIs & CMS

  • Twitter/X API
  • Facebook API
  • Instagram API
  • YouTube API
  • LINE API
  • FaceAPI
  • WordPress
  • Strapi
Career

Experience

10+ years across full-stack and backend-focused roles, with a deliberate shift toward backend systems over the last several years.

2022 — PRESENT
Senior Backend Engineer
Joy Groups International · Thailand (Remote)
Own backend architecture for a large multi-module production system serving 1,000+ concurrent users. Design REST APIs, database schemas, and background-job processing with NestJS, Redis, RabbitMQ/BullMQ, and Aurora/PostgreSQL. Lead backend development for the company's core platform and integrations. All experience listed in this portfolio is from this role unless otherwise noted.
NestJSRedisRabbitMQ/BullMQAurora/PostgreSQLReact.jsGraphQL
2024 — PRESENT
iOS Developer (Backend-Focused)
Motivation Works Inc. · Japan (Remote)
Fully developed the BLEND iOS application in Swift — a school management system for communication, attendance, and grade tracking. Designed and implemented backend services and APIs to support the app's features, including user authentication, real-time messaging, and data synchronization. Built the full UI/UX with UIKit and managed the complete app lifecycle from development to App Store deployment.
SwiftUIKitREST APIsBackend ServicesFirebaseApp Store Deployment
JUL 2022 — JUL 2024
Backend & Mobile Engineer
Meglio Futuro Myanmar Co., Ltd. · Yangon
Delivered backend and mobile features (Swift/iOS & React Native) for corporate clients, working directly with a Japanese team on complex project flows and authentication.
Swift/iOSReact NativeGoogle/GitHub Auth
JUL 2020 — JAN 2021
Frontend Developer
Better HR Co., Ltd.
Built real-time features with WebSockets and GraphQL subscriptions; worked closely with the DevOps team under tight delivery timelines.
WebSocketsGraphQL SubscriptionsResponsive UI
AUG 2018 — JAN 2022
Team Lead / Full-Stack Engineer
Seattle Consulting Myanmar Co., Ltd. · Yangon
Led a team of 5 on large, complex projects for corporate clients. Owned REST/GraphQL APIs, Stripe payment flows, and E2E/unit testing with Jest, Playwright, and Cypress across multiple deployment targets. Shipped 20+ projects spanning PHP/Laravel, Vue/Nuxt, Angular, React/Next.js, Firebase, DynamoDB, and WordPress.
PHP/LaravelVue/Nuxt.jsAngularReact/Next.jsFirebaseDynamoDBStripeWordPress
Ongoing freelance & contract work AI & Telegram automation projects · Third-party SMS/email/payment integrations · Backend services for a consumer iOS application (Blend, Japan)

Education

B.Sc. Computer Science — University of Computer Studies, Yangon

2019 · Focus: Artificial Intelligence, Data Mining

Certification — Youth Social Force: Leadership & Management (2016)

Languages

BurmeseNATIVE
EnglishProfessional Working Proficiency
JapaneseN5
Get in touch

Let's work together

I'm looking for remote backend roles — contract, part-time, or full-time — with async-first, written-communication-friendly teams.

khaingmintun.dev@gmail.com ↗ LinkedIn ↗ GitHub ↗ Download Resume (PDF) ↓