You will get Fix NestJS API bugs and backend issues quickly and professionally
Project details
I help businesses and developers fix issues in their NestJS and Node.js backend applications. I will debug API errors, resolve backend bugs, improve performance, and help ensure your REST APIs work reliably.
With experience building SaaS, fintech, and business applications, I focus on clean, maintainable, and scalable backend solutions.
This service is perfect for fixing API errors, database issues, authentication problems, integration bugs, and backend performance challenges.
Technologies I work with:
• NestJS
• Node.js
• TypeScript
• MongoDB / Mongoose
• PostgreSQL
• REST APIs
You will receive clear communication, clean code fixes, and a professional backend solution.
With experience building SaaS, fintech, and business applications, I focus on clean, maintainable, and scalable backend solutions.
This service is perfect for fixing API errors, database issues, authentication problems, integration bugs, and backend performance challenges.
Technologies I work with:
• NestJS
• Node.js
• TypeScript
• MongoDB / Mongoose
• PostgreSQL
• REST APIs
You will receive clear communication, clean code fixes, and a professional backend solution.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$10
|
Standard
$25
|
Advanced
$50
|
|---|---|---|---|
| Delivery Time | 1 day | 2 days | 3 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 1 | 1 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$5Frequently asked questions
About Fufa
Backend Engineer | NestJS & Node.js | REST | SaaS & FinTech Systems
Addis Ababa, Ethiopia - 1:19 pm local time
I can help you fix bugs, debug APIs, or complete small backend tasks quickly.
I’m a backend engineer with hands-on experience building scalable SaaS and FinTech systems using Node.js and NestJS.
I’ve worked on production systems that handle real users, real payments, and real business workflows — not just demos. My focus is on building backend architectures that are secure, reliable, and designed to scale from the start.
In my current role and recent projects, I’ve:
• Built secure REST APIs with JWT authentication and role-based access control (RBAC)
• Designed multi-tenant systems with strong data isolation across organizations
• Implemented payment and subscription workflows with reliable webhook handling
• Improved API performance by around 30% using Redis caching and optimized queries
• Worked on systems supporting 1,000+ concurrent users and high-volume transactions
What I usually help clients with:
• Backend architecture and API development (Node.js, NestJS)
• SaaS platforms and multi-tenant system design
• Database design (PostgreSQL, MongoDB)
• Authentication, authorization, and security
• Performance optimization and debugging
• Payment integrations and subscription systems
Some of the systems I’ve built include a multi-tenant SaaS platform with real-time features, a payment and subscription backend with fault-tolerant processing, and CMS platforms used in real organizations.
I care about writing clean, maintainable code and building systems that hold up in production — not just in development.
If you need a backend developer who understands both system design and real business use cases, I’m open to working together.
Steps for completing your project
After purchasing the project, send requirements so Fufa can start the project.
Delivery time starts when Fufa receives requirements from you.
Fufa works on your project following the steps below.
Revisions may occur after the delivery date.
Review requirements and analyze the backend issue
I review your bug description, code, error logs, and project structure to understand the problem.
Debug and identify the root cause
I analyze the API flow, database queries, integrations, and backend logic to find the cause of the issue.