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Fiverr Pro
English
$
USD
I will fix bugs in your node js nestjs and typescript backend
Danny Bernal
About this gig
Is your Node.js or NestJS backend throwing errors, crashing or behaving unexpectedly? I will find the root cause and fix it.
I am a Backend Developer with 5+ years of experience building enterprise software with Node.js, NestJS, TypeScript and PostgreSQL.
What I can fix:
- Runtime errors, crashes and unhandled exceptions
- REST API bugs and wrong responses
- PostgreSQL and TypeORM query or database issues
- Authentication and validation problems
- RabbitMQ, message queue and third party integration errors
- Docker and environment configuration issues
- Slow endpoints and performance problems
What you get:
- A working, tested fix
- A clear explanation of the root cause
- Clean, maintainable code that respects your project structure
Please message me before ordering with a short description of the problem, so I can confirm it fits the package scope.
I communicate in written English.
Get to know Danny Bernal
Danny Bernal
Backend and Full Stack Developer, AI Assisted Development
- FromColombia
- Member sinceOct 2026
Languages
Spanish, English
Backend and Full Stack Developer with 5+ years of experience building enterprise software. I specialize in Node.js, NestJS, TypeScript and PostgreSQL: REST APIs, system integrations, process automation and event-driven architectures with RabbitMQ.
I use AI-assisted development (Cursor, Claude, OpenSpec spec-driven workflows) to analyze requirements, design, implement, refactor and test faster, always keeping technical review over AI-generated code.
I deliver clean, maintainable and scalable solutions. I work in Spanish and communicate in written English.
Other Software Development Services I Offer
FAQ
What do you need from me to start?
Access to the code (GitHub, GitLab or a zip), steps to reproduce the bug, error logs or screenshots, and environment variables or a test database if needed.
What if the bug cannot be fixed?
If after investigating I cannot fix the issue within the package scope, I will explain what I found and you can cancel the order or we can agree on a custom offer.
Do you work with Express or other Node.js frameworks?
Yes. My main stack is NestJS, but I also fix bugs in Express and plain Node.js projects written in JavaScript or TypeScript.
