I’m a Fullstack Engineer with 7+ years of experience building SaaS platforms, backend systems, web applications, IoT platforms, and workflow automation solutions.
My core stack includes Node.js, TypeScript, NestJS, ExpressJS, React, Angular, AWS Lambda, SQS, Step Functions, S3, PostgreSQL, MySQL, MongoDB, Redis, RabbitMQ, and REST API integrations.
I can help you with:
- Building fullstack web applications from frontend UI to backend APIs
- Developing scalable Node.js/NestJS backend services
- Creating React or Angular interfaces connected to real business workflows
- Designing AWS serverless workflows and asynchronous processing systems
- Integrating third-party APIs with retries, batching, and rate limiting
- Applying AI tools and AI-assisted workflows to speed up development, refactoring, automation, and internal productivity tools
- Building IoT backend systems and real-time data processing pipelines
I have worked on enterprise SaaS products, manufacturing IoT systems, CMS platforms, workflow automation systems, and serverless backend services. I’m comfortable working with remote teams, clarifying requirements, reviewing code, and delivering clean, maintainable production code.
If you need a fullstack developer who can understand the business flow, build reliable software, and use AI effectively to improve delivery speed and quality, I’d be happy to help.
Node.js
ExpressJS
MongoDB
Artificial Intelligence
React
MySQL
Python
TypeScript
NestJS
AWS Lambda
PostgreSQL
Redis
REST API
API Integration
Docker
Serverless Computing
Laravel
PHP
Tailwind CSS
Next.js
Stephen D.
Ho Chi Minh City, Vietnam
$18/hr
5.0
1 jobs
Architecture design and full-stack development, with over 4 𝒚𝒆𝒂𝒓𝒔 of experience in software development.
Has experience building a 𝒍𝒂𝒓𝒈𝒆 𝒔𝒚𝒔𝒕𝒆𝒎 𝒇𝒓𝒐𝒎 𝒔𝒄𝒓𝒂𝒕𝒄𝒉, using 𝒎𝒊𝒄𝒓𝒐𝒔𝒆𝒓𝒗𝒊𝒄𝒆.
𝐂𝐚𝐧 𝐢𝐧𝐯𝐨𝐥𝐯𝐞 𝐦𝐮𝐥𝐭𝐢𝐩𝐥𝐞 𝐩𝐡𝐚𝐬𝐞𝐬 𝐨𝐟 𝐭𝐡𝐞 𝐬𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐩𝐫𝐨𝐜𝐞𝐬𝐬:
⇥ Analyze requirements and give feedback
⇥ Plan and manage tasks/bugs on JIRA
⇥ Create architecture design for the system
⇥ Design API schema (GraphQL, REST, SocketIO …)
⇥ Implement backend code, create test cases for automation test
⇥ Apply CI/CD to automatic test and deployment flow
𝐈 𝐚𝐥𝐫𝐞𝐚𝐝𝐲 𝐰𝐨𝐫𝐤𝐞𝐝 𝐨𝐧:
✓ 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 𝐝𝐞𝐬𝐢𝐠𝐧
⇥ Create full architecture design for a system, decide technical stacks, protocols, performance …
⇥ Apply API gateway for security, log, validate … Has written plugins for API gateway
⇥ Using message queue to synchronize communication between microservices
⇥ Handle distribution transactions for microservices (Saga pattern, outbox table pattern …)
⇥ Handle security for the system
✓ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭:
⇥ Strong experience with NodeJS, MongoDB, and other languages: Golang, and Java. Have the ability to give a good solution to a problem.
⇥ Create backend API with REST and GraphQL
⇥ Apply WebRTC, and WebSocket for real-time application
⇥ Extensive experience with MediaServer technologies such as Kurento and Mediasoup. Implemented real-time audio and video streaming solutions using these platforms.
⇥ Created a template for NodeJS to speed up the development process.
⇥ Always write clean code, easy to maintain and integrate. Create unit test, and integration test.
✓ 𝐎𝐭𝐡𝐞𝐫 𝐬𝐤𝐢𝐥𝐥𝐬:
⇥ FFMPEG process video
⇥ Good at English for both speaking and writing
⇥ Have knowledge about ReactJS and Vue
Just invite me, and I will show you what I can do.
Node.js
PostgreSQL
Docker
TypeScript
Golang
WebRTC
Architectural Design
Rick N.
Ho Chi Minh City, Vietnam
$15/hr
5.0
7 jobs
Senior Node.js, React & React Native developer with 5+ years of experience building scalable APIs, web/mobile apps, and real-time systems. Strong background in authentication, payments, Firebase, AWS, and AI integrations for SaaS platforms.
Backend-focused engineer with solid frontend expertise—React.js for SPAs and React Native for cross-platform mobile applications—delivering clean, maintainable, and production-ready code.
Tech stack highlights:
- Node.js (MEAN & MERN stacks)
- React.js & React Native
- GraphQL & RESTful APIs
- MongoDB, MySQL, PostgreSQL
- TypeORM, Sequelize, Prisma,...
- AWS services
I’d be excited to apply my skills to your project and deliver meaningful value to your team.
Node.js
ExpressJS
JavaScript
MongoDB
NestJS
PostgreSQL
Microservice
API Development
CSS 3
Git
TypeScript
React
React Native
Firebase
NodeJS Framework
Quan P.
Da Nang, Vietnam
$11/hr
5.0
4 jobs
4+ Years of Backend & Cloud Expertise
Backend Developer who turns complex logic into scalable, high-performance systems.
10+ Enterprise Projects | Millions of Records Optimized | AI-Powered Platforms
Mobile & Web Solutions | Cloud-First Architectures
I help startups, enterprises, and product teams build efficient, reliable, and scalable solutions.
Whether you’re handling millions of users or fixing performance bottlenecks, I deliver results fast.
Let’s talk before your competitors ship first.
Certified in Software Development Lifecycle & Web Technologies
Specialist in: Node.js • Python • Express • Next.js • React.js • AdonisJS • Nest.js
Services Include
Scalable Backend & API Development
Modern Web & Mobile Apps
Cloud & DevOps (AWS, GCP, Serverless)
Database Design & Optimization
QA, CI/CD & Full-Cycle Delivery
As a Backend Developer, I’ve solved scaling issues for systems with hundreds of thousands of users, optimized databases with 500+ tables, and led projects from scratch to production. My experience spans finance apps, real estate platforms, healthcare systems, and AI-driven solutions.
Tech Stack
Programming: Node.js, Python, TypeScript, JavaScript
Frameworks: Express, NestJS, Django, AdonisJS, Next.js, React.js
Databases: PostgreSQL, MySQL, SQL Server
Cloud/DevOps: AWS (Lambda, S3), GCP, Serverless, Docker, Kubernetes
Others: GraphQL, NFC Apps, CI/CD Pipelines, SCRUM Agile
Highlights
Optimized large-scale systems (millions of records) for performance & scalability
1755366255035
Refactored legacy code reducing ~20% lines while improving clarity & speed
Built AI Sign Language Recognition platform (SLOM) for the hearing-impaired
Developed finance investment app with tailored fund recommendations
Designed real-time bus/NFC system for safety & tracking
Industries Served
FinTech • Real Estate • Healthcare • AI & Ed-Tech • Transportation • Hospitality • Retail
Let’s collaborate to build innovative, scalable, and future-proof solutions.
Whether you need a custom CRM/ERP, a cloud-native backend, or an AI-powered platform, I can help you succeed.
Backend Developer | Full-Stack Engineer | Cloud Solutions | Node.js Specialist
Node.js
Web Application
Web Development
International Development
AWS Amplify
Amazon EC2
Load Balancing
Amazon S3
AWS Lambda
Amazon Cognito
AWS CloudFormation
System Configuration
Amazon ECS
NodeJS Framework
MERN Stack
Rick N.
Ho Chi Minh City, Vietnam
$25/hr
4.8
67 jobs
Full-Stack Developer | Node.js · React · Vue · AWS
I'm a full-stack developer with 8+ years of experience building scalable web applications and RESTful APIs. I specialize in Node.js (TypeScript & JavaScript) on the backend and React or Vue on the frontend, covering everything from database design to cloud deployment.
My core stack includes:
- Backend: Node.js, Express, NestJS, Sails.js
- Databases: MongoDB, MySQL, PostgreSQL · Sequelize, TypeORM, Prisma
- Frontend: React, Vue, Angular · Tailwind, Bootstrap, MUI
- Payments: Stripe, PayPal, Braintree
- Cloud: AWS (EC2, Lambda, RDS, API Gateway, App Runner), Google Cloud, Azure
I focus on clean architecture, maintainable code, and on-time delivery. Whether you need a new application built from scratch or improvements to an existing system, I bring both technical depth and clear communication to every project.
Node.js
Ruby on Rails
AngularJS
MySQL
Amazon EC2
SaaS Development
Full-Stack Development
React
Vue.js
AI Implementation
Mobile App
Ecommerce Platform
CRM Development
Web Development
API Development
Front-End Development
Back-End Development
API Integration
AI App Development
TypeScript
Dao Thanh L.
Hanoi, Vietnam
$8/hr
5.0
8 jobs
👨💻 Backend Node.js Developer (5+ years) specializing in high-performance systems, AI/LLM integration, and secure API architecture.
🛠️ Core Tech Stack: Node.js, NestJS, Express, TypeScript, PostgreSQL, MongoDB, Redis
🔌 Integration Expert: Deep experience with third-party payment systems, disbursement APIs, and secure webhook architectures
🚀 Production-Ready: I don't just ship features — I build secure, maintainable backend systems that survive real-world traffic
🤝 Technical Partner: I bridge the gap between business requirements and clean, scalable backend code
As a Backend Node.js Developer, I'm the person you call when you need to move from a prototype to a production-grade system — whether it's architecting a complex payment flow, integrating LLM/RAG capabilities into your product, or stabilizing a backend that's struggling to scale. I focus on the "how" as much as the "what."
Here is how I add value to your project:
1. Backend & API Architecture (Node.js, NestJS, Express)
Designing robust APIs that handle authentication, complex permissions, and business logic. Specialized in secure third-party integrations — payment gateways, disbursement systems — including signature generation and sandbox-to-production migration.
2. AI & LLM Integration (RAG, Vector Search)
Building RAG pipelines — document ingestion, embedding, retrieval — and integrating LLM-based agents into production workspaces, backed by custom evaluation harnesses to test and tune retrieval quality.
3. Database & Infrastructure (PostgreSQL, MongoDB, Redis)
Designing relational and NoSQL schemas that actually scale. Optimizing queries and implementing caching layers to keep your app fast as your data and user base grow. Track record of cutting infrastructure costs by 30-40% through targeted optimization.
4. Microservices & Clean Architecture
Architecting API gateways and service boundaries for complex, multi-team systems — applying Clean Architecture and DDD principles so your codebase stays maintainable as it grows.
5. System Security & Reliability
Implementing secure backend standards to prevent common vulnerabilities and unauthorized access. Managing background jobs and async processing that stay stable as requirements evolve.
Technical Toolbox
Backend: Node.js, Express, NestJS, Loopback, TypeScript
Database: PostgreSQL, MongoDB, Redis
AI/LLM: RAG pipelines, Pinecone, LLM APIs, custom evaluation harnesses
Integrations: Payment APIs, Disbursement Systems, RESTful Webhooks, gRPC
Tools: Git, CI/CD, Postman, Linux
When we work together, you aren't just hiring a coder — you're hiring an engineer who cares about the security and longevity of your backend. I make the technical trade-offs early so you don't pay for expensive rewrites later.
🔑 Keywords: Backend Developer, Node.js Developer, NestJS Developer, TypeScript Developer, API Developer, Microservices Architect, PostgreSQL Developer, MongoDB Developer, Redis, RAG Developer, LLM Integration, AI Backend Engineer, Payment Integration Developer, Cloud Deployment, Software Architecture, Startup Backend
Node.js
Git
Golang
SQL
AI Agent Development
AI Chatbot
LLM Prompt Engineering
LLM Prompt
Front-End Development
Back-End Development
Full-Stack Development
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