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Fiverr Pro
English
$
USD
I will develop and QA test your backend or API
Noe Fernandez
About this gig
BASIC: Small API or Bug fix
Whats included:
- Development of 1 simple REST endpoint (GET/POST) or bug fixing in an existing backend
- Basic data validation
- Database connection (if needed)
- Clean and documented code
- Basic endpoint testing
Tech stack:
Node.js (Express) or .NET
Delivery time:
24-48 hours
STANDARD: Backend Feature - Backend Module or API Feature Development
Whats included:
- Development of a backend module or feature
- 3-5 REST endpoints (CRUD)
- Project structure setup
- Database integration (SQL)
- Error handling and validations
- Basic documentation (Postman)
- Manual endpoint testing
Examples:
- User system (login/register)
- Product/service CRUD
- Simple API integrations
Delivery time:
3 - 5 days
PREMIUM Full Backend Solution - Advanced Backend Development Scalable API or Monolith
Whats included:
- Full backend design and development (monolith or modular)
- Clean and scalable architecture
- 5+ structured REST endpoints
- Optimized database integration
- Authentication (JWT or similar)
- Third-party API integrations
- Advanced error handling
- Basic logging
- Documentation (Postman)
- Post-delivery support (minor fixes)
Tech stack:
Node.js or .NET + SQL
Delivery time:
5-10 days
Get to know Noe Fernandez
Noe Fernandez
Fullstack Developer and QA Tester
- FromArgentina
- Member sinceSep 2025
- Avg. response time1 hour
Languages
Spanish, English
Backend Developer & QA Tester with 10+ years of experience in fintech, banks, and startups. I build scalable APIs (Node.js/.NET) and ensure quality through testing (manual & API).
I don’t just develop — I make sure everything works correctly, efficiently, and without critical bugs.
Skilled in backend development, bug fixing, database optimization, and detailed QA reporting.
Fast delivery, clear communication, and focused on improving your product 🚀
FAQ
What services do you offer?
I provide backend development (APIs, modules, bug fixing) and QA testing (manual, API, functional). I can build, improve, and test your system to ensure it works reliably before release.
What technologies do you work with?
I mainly use Node.js, .NET framework, Go for backend development, and SQL databases (MySQL, SQL Server, Oracle). For testing, I use tools like Postman and perform manual and exploratory testing.
Can you both develop and test my project?
Yes. My main advantage is combining development and QA. I can build your backend and also test it thoroughly to detect bugs early and ensure high quality.
Do you fix bugs in existing projects?
Yes. I can analyze your code, identify issues, and fix bugs in backend systems, APIs, or databases, improving stability and performance.
What do you need to get started?
I need a clear description of your requirements, access to your code (if applicable), API documentation, and expected outcomes. The more details you provide, the better the results.
Do you provide documentation?
Yes. I provide clear documentation including API endpoints (Postman), setup instructions, and bug reports with steps, screenshots, and videos when needed.
How do you ensure code quality?
I follow clean code practices, validate inputs, handle errors properly, and test all functionalities. I also perform QA testing to ensure everything works correctly before delivery.
Do you work with databases?
Yes. I design, optimize, and manage SQL databases. I can create queries, improve performance, and validate stored procedures.
Can you handle urgent tasks?
Yes. I’m available for quick tasks and can deliver small fixes or testing within 24–48 hours depending on the scope.
Do you offer revisions?
Yes. I include revisions to ensure the final result meets your expectations. Minor fixes are included after delivery.
