You will get a scalable backend API using Node.js, NestJS, and PostgreSQL
Rising Talent
Rising Talent
Project details
Are you looking for a robust, secure, and highly scalable backend for your web or mobile application? With over 8+ years of professional software development experience, I specialize in designing and building enterprise-grade backend systems from scratch.
Using the modern and strictly typed NestJS framework alongside Node.js, I ensure your backend is maintainable, highly performant, and follows industry best practices like SOLID principles and clean architecture. Whether you need a strictly structured relational database (PostgreSQL) for complex transactions, a flexible NoSQL database (MongoDB) for fast data handling, or a hybrid of both, I have the expertise to deliver the perfect solution.
My focus is not just on writing code, but on building secure infrastructures that won't break at scale. You can expect clean, modular, and extensively documented code, secure authentication (JWT/OAuth), and seamless third-party API integrations (Stripe, AWS, etc.). I prioritize excellent communication and will keep you updated throughout the entire development lifecycle. Let's build a rock-solid foundation for your application!
Using the modern and strictly typed NestJS framework alongside Node.js, I ensure your backend is maintainable, highly performant, and follows industry best practices like SOLID principles and clean architecture. Whether you need a strictly structured relational database (PostgreSQL) for complex transactions, a flexible NoSQL database (MongoDB) for fast data handling, or a hybrid of both, I have the expertise to deliver the perfect solution.
My focus is not just on writing code, but on building secure infrastructures that won't break at scale. You can expect clean, modular, and extensively documented code, secure authentication (JWT/OAuth), and seamless third-party API integrations (Stripe, AWS, etc.). I prioritize excellent communication and will keep you updated throughout the entire development lifecycle. Let's build a rock-solid foundation for your application!
Programming Languages
JavaScript, ASP.NET, TypeScriptCoding Expertise
Localization, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$400
|
Standard
$1,000
|
Advanced
$2,500
|
|---|---|---|---|
| Delivery Time | 7 days | 14 days | 28 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 5 | 15 | 30 |
Design Customization | - | - | |
Content Upload | - | - | |
Responsive Design | - | - | |
Source Code | - | - |
Optional add-ons
You can add these on the next page.
Cloud Server Deployment
(+ 2 Days)
+$250
Dockerization
(+ 1 Day)
+$150
Swagger/OpenAPI Documentation
(+ 1 Day)
+$100
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PS
Preet S.
May 26, 2026
Update Corsica backend from railway to another server
We had issues with Railway server and hired Shahin to migrate to a new server provider. He seamlessly delivered the change.
PS
Preet S.
May 13, 2026
Create Corsica refill order cancellation flow before order creation and Update customer info
Shahin delivered quickly on added scope which was not scoped in previous project. He was able to quickly work and deliver the needed change in the flow
PS
Preet S.
May 1, 2026
Backend Development for Corsica health and Deployment
Shahin is a good developer. He worked on a major backend setup for us, while working on this project - we ran into many issues from stripe to subscription contract underwriting. Shahin was able to apply fixes to all those issues and push the project to a successful deployment. Will hire/work with him again
About Md Shahin
Full-Stack Web Developer
Dhaka, Bangladesh - 3:49 am local time
I build modern full‑stack web applications that are fast, secure, and easy to maintain—using React/Next.js on the frontend and Node.js (Express) or .NET on the backend. If you need to fix bugs, add new features, improve performance, or build complete modules, I can deliver clean, production‑ready code with clear communication and predictable milestones.
WHAT I CAN HELP YOU BUILD
1. Web app features & modules (new pages, forms, dashboards, workflows, user management)
REST APIs & backend services in Node/Express or .NET (validation, error handling, clean architecture)
2. Database design & integrations with PostgreSQL and MongoDB
3. Authentication & authorization (JWT, sessions, role-based access/RBAC)
4. Real-time features (notifications, live updates, chat) with Socket io (if needed)
5. Bug fixing & performance improvements (Next.js rendering/data fetching, API response time, UI issues)
HOW I WORK (SO PROJECTS STAY ON TRACK)
1. Confirm requirements, scope, and success criteria
2. Propose a milestone plan with clear deliverables (weekly or per feature)
3. Implement with clean, readable code + frequent progress updates
4. Test, deliver, and support deployment/handover when needed
WHY CLIENTS HIRE ME
1. Fast debugging & problem solving (I find root causes, not just symptoms)
2. Maintainable code (reusable components, clean structure, easy future updates)
3. Reliable communication (quick responses, clear timelines, no surprises)
4. Quality-focused delivery (performance, security basics, and edge cases)
TECH STACK
1. Frontend: React, Next.js, TypeScript, Tailwind CSS, HTML/CSS
2. Backend: Node.js/Express, .NET / .NET Core, REST APIs
3. Database: PostgreSQL, MongoDB
4. Tools: Git, Docker (as needed)
A GOOD FIT IF YOU’RE LOOKING FOR
1. A developer to fix bugs or stabilize an existing web app
2. Someone to build new features in React/Next.js with backend API support
3. Clean API development with strong database fundamentals
4. A reliable developer who can take ownership from requirements → implementation → delivery
5. Message me your requirements (or repo link) and I’ll suggest the fastest, safest implementation plan—along with a clear estimate and milestone breakdown.
Steps for completing your project
After purchasing the project, send requirements so Md Shahin can start the project.
Delivery time starts when Md Shahin receives requirements from you.
Md Shahin works on your project following the steps below.
Revisions may occur after the delivery date.
Architecture & Database Design
I will analyze your requirements and design the database schema (PostgreSQL or MongoDB) and core API architecture. I will share this for your approval before coding.
Core API Development & Integration
I will build the secure RESTful endpoints using Node.js and NestJS. During this phase, I will also integrate any required third-party services (payments, emails, etc.).