I will fix bugs in your node js, nestjs or typescript backend

C
carlospadilla09
C
carlospadilla09
Rafael P
fix bugs in your node js, nestjs or typescript backend
Full Screen
fix bugs in your node js, nestjs or typescript backend

About this gig

Your backend is throwing errors and you need it working today.


I'm a Senior Software Engineer with 5+ years in production systems: fintech, core banking, e-invoicing middleware and ETL pipelines. I debug for a living.


WHAT I FIX

Node.js, NestJS and Express runtime errors and crashes

TypeScript type and build errors

Broken REST API endpoints and wrong responses

Database and ORM issues (TypeORM, Prisma, Entity Framework)

Async/await, promise and race condition bugs

Authentication and JWT problems

Failing or flaky tests


HOW IT WORKS

Step 1: Send me the repo or the code plus the error message.

Step 2: I confirm scope and timeline before you order. No surprises.

Step 3: I fix it and explain what was wrong and why.


YOU GET

Working code, a short written explanation of the root cause, and free follow-up if the same bug comes back.


I do not guess. If I can't fix it, I tell you before you pay.


Message me with your error. I usually reply within an hour.

  • Programming language

    • JavaScript

  • Expertise

    • Debugging
    • Performance
    • Security
    • Databases
    • Testing procedures

  • Frontend framework

    • Angular
    • Next.js
    • React.js
    • Vue.js

  • Backend framework

    • Express.js
    • FastAPI
    • NestJS
    • Node.js

Get to know Rafael P

Rafael P

Senior Backend Engineer for Fintech and Enterprise Systems

  • FromEl Salvador
  • Member sinceAug 2026
  • Avg. response time1 hour

  • Languages

    Spanish
Senior Software Engineer with 5+ years building backend systems for fintech and enterprise products. Right now I build and maintain a production core banking platform: credit and prepaid cards, Mastercard integrations, loyalty programs. Stack: .NET/C#, SQL Server, Node.js/NestJS, microservices on Docker and Azure Kubernetes with CI/CD. Before that: e-invoicing middleware still used by real companies, ETL pipelines and lending software. What you get: code that runs, honest timelines, and a clear explanation of what was wrong. Message me first. I'll tell you straight if I'm the right fit.

My Portfolio

Related tags