You will get Fix or improve your Node.js, Express, or NestJS backend API
Project details
You will get a carefully diagnosed and professionally implemented fix for your Node.js, Express, or NestJS backend.
I help startups and businesses resolve broken API endpoints, authentication problems, database issues, validation errors, third-party integration failures, and unfinished backend features.
I work with Node.js, TypeScript, NestJS, Express, PostgreSQL, Prisma, MongoDB, Swagger, Jest, and Docker. My approach is structured: I review the requirements, reproduce the problem, identify the root cause, implement the agreed solution, and test the affected workflow before delivery.
You will receive maintainable source-code changes, testing results, and a clear explanation of what was fixed. I can work within an existing codebase and follow its current architecture and coding standards.
Please message me before ordering if the issue involves several modules, major architectural changes, or a complete application rebuild.
I help startups and businesses resolve broken API endpoints, authentication problems, database issues, validation errors, third-party integration failures, and unfinished backend features.
I work with Node.js, TypeScript, NestJS, Express, PostgreSQL, Prisma, MongoDB, Swagger, Jest, and Docker. My approach is structured: I review the requirements, reproduce the problem, identify the root cause, implement the agreed solution, and test the affected workflow before delivery.
You will receive maintainable source-code changes, testing results, and a clear explanation of what was fixed. I can work within an existing codebase and follow its current architecture and coding standards.
Please message me before ordering if the issue involves several modules, major architectural changes, or a complete application rebuild.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$89
|
Standard
$249
|
Advanced
$549
|
|---|---|---|---|
| Delivery Time | 2 days | 4 days | 7 days |
Number of Revisions | 1 | 2 | 2 |
Number of Pages | 1 | 3 | 5 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Additional API endpoint or bug fix
(+ 1 Day)
+$60
Deployment assistance
(+ 2 Days)
+$100Frequently asked questions
About Tosin
Node.js & NestJS Backend Developer | APIs, PostgreSQL, Prisma
Lagos, Nigeria - 11:46 pm local time
I help startups and businesses develop reliable backend systems using Node.js, TypeScript, NestJS, Express, PostgreSQL, Prisma and MongoDB.
I can help with:
• REST API development and third-party integrations
• JWT authentication and role-based access control
• PostgreSQL and Prisma database design
• Backend bug fixing and unfinished features
• Swagger API documentation
• Unit and end-to-end testing with Jest
• Docker setup and application deployment
• Next.js full-stack features and admin dashboards
Recent systems I have developed include a retail POS and inventory platform, a pharmacy management API, ecommerce applications and an education website assessment API.
I focus on clean, maintainable code, clear communication and dependable delivery.
Send me your requirements, existing repository or backend problem, and I will review it and recommend the most practical way forward.
Steps for completing your project
After purchasing the project, send requirements so Tosin can start the project.
Delivery time starts when Tosin receives requirements from you.
Tosin works on your project following the steps below.
Revisions may occur after the delivery date.
Review requirements and code
I will review the reported issue, relevant source code, project setup, and expected result to confirm the scope and identify any missing information.
Diagnose the backend issue
I will reproduce the problem, inspect logs and application flow, and identify the root cause before making changes.