You will get a production-ready REST API built with Node.js, NestJS and PostgreSQL
Project details
Get a REST API that's actually ready for production — not a tutorial-grade prototype. Built with Node.js, NestJS and TypeScript on your choice of SQL or NoSQL database (PostgreSQL, MySQL, MongoDB): validated inputs, proper error handling, authentication, tests, and Docker, so your team can build on it with confidence.
WHAT YOU GET
• Clean, typed codebase (NestJS + TypeScript) following industry best practices
• Input validation, structured error handling, and JWT authentication (Standard+)
• Unit tests with 80%+ coverage on business logic (Standard+)
• Docker setup, API documentation, and a deploy guide — cloud deployment (AWS, Azure) available as an add-on
• Full source code — you own everything
WHY ME
I'm a Senior Software Engineer with 5 years building backend systems that run 24/7 in production for the energy industry — services handling thousands of events per second, where reliability isn't optional. I bring that same standard to every API I ship: tested, documented, designed for failure.
Revisions cover adjustments within the agreed scope — new endpoints or features beyond it are handled via add-ons or a new order.
WHAT YOU GET
• Clean, typed codebase (NestJS + TypeScript) following industry best practices
• Input validation, structured error handling, and JWT authentication (Standard+)
• Unit tests with 80%+ coverage on business logic (Standard+)
• Docker setup, API documentation, and a deploy guide — cloud deployment (AWS, Azure) available as an add-on
• Full source code — you own everything
WHY ME
I'm a Senior Software Engineer with 5 years building backend systems that run 24/7 in production for the energy industry — services handling thousands of events per second, where reliability isn't optional. I bring that same standard to every API I ship: tested, documented, designed for failure.
Revisions cover adjustments within the agreed scope — new endpoints or features beyond it are handled via add-ons or a new order.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$150
|
Standard
$400
|
Advanced
$800
|
|---|---|---|---|
| Delivery Time | 5 days | 10 days | 15 days |
Number of Revisions | 1 | 2 | 2 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Extra endpoint (beyond tier limit)
(+ 1 Day)
+$25
Swagger/OpenAPI interactive documentation
(+ 1 Day)
+$50
Deployment to your cloud or VPS
(+ 2 Days)
+$100Frequently asked questions
About Dat
Senior Node.js/NestJS Developer | Real-Time & Event-Driven Systems
Ho Chi Minh City, Vietnam - 5:01 am local time
For the past 5 years, I've built mission-critical systems for the energy industry: platforms where engineers monitor live drilling operations, and where a delayed event or a bad data write has real-world consequences. That environment taught me to write code that is tested (80%+ coverage as standard), observable, and designed for failure - not just code that works on the happy path.
WHAT I CAN DO FOR YOU
- Design and build REST APIs & microservices with Node.js, NestJS, and TypeScript
- Real-time features: Kafka event streaming, WebSockets - thousands of events/second with sub-second latency
- Database design & optimization (PostgreSQL, MongoDB) for large, consistency-critical datasets
- Full-stack delivery with React or Angular when you need frontend covered too
- Code audits: architecture, performance bottlenecks, and test coverage - delivered as a prioritized, actionable report
RECENT WORK
On a real-time drilling monitoring platform, I built the pipeline that streams rig telemetry (torque, pressure, ROP) from Kafka through WebSockets to live dashboards - thousands of events per second at sub-second latency, with anomaly detection that helps engineers catch dangerous conditions before they escalate - cutting engineers' manual review time by ~30%. The system runs 24/7 in production, where downtime isn't an option.
HOW I WORK
Clear communication, honest estimates, no surprises. I ask questions before writing code, commit in small reviewable chunks, and document what I build. I've led a 5-engineer Scrum team and worked onsite with US-based enterprise teams - comfortable in English, async or on calls, with US timezone overlap available.
If you need a backend that won't fall over when it matters, send me a message - I'll reply with concrete questions about your project.
Technologies: Node.js, NestJS, TypeScript, JavaScript, React, Angular, Express, REST API, Kafka, WebSocket, PostgreSQL, MongoDB, Redis, Docker, Kubernetes, AWS (Lambda, S3, EC2, RDS), Azure, CI/CD, Jest, unit testing, microservices, event-driven architecture, system design, Python, ETL, data pipeline
Steps for completing your project
After purchasing the project, send requirements so Dat can start the project.
Delivery time starts when Dat receives requirements from you.
Dat works on your project following the steps below.
Revisions may occur after the delivery date.
Scope & design
We confirm entities, endpoints, and auth needs. I design the database schema and API structure before writing code.
Build & test
I implement the API with validation, error handling, and unit tests — committed in small, reviewable chunks with progress updates.