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Fiverr Pro
English
$
USD
I will debug and fix your nodejs API or express backend bug
Phan Minh Hieu
About this gig
Is your Node.js API returning errors or behaving inconsistently?
I help troubleshoot existing Node.js, TypeScript and Express backends, including API validation, error handling and database queries with PostgreSQL or MongoDB.
My production experience includes a MongoDB-to-PostgreSQL migration, Redis caching and query optimization that reduced homepage load time from 4s to 1s, and background processing with RabbitMQ and Bull.
Basic covers diagnosis and a written action plan. Standard and Premium cover only the specific fix described in each package. I deliver clear notes and relevant verification results.
Please message me on Fiverr with the symptoms and reproduction steps before ordering so we can confirm the right scope.
Full application builds, broad security audits, major upgrades and production deployment are not included. Share sanitized logs and test data; do not send production secrets in your initial message.
Get to know Phan Minh Hieu
Phan Minh Hieu
NodeJS Backend Developer, APIs and PostgreSQL
- FromVietnam
- Member sinceSep 2026
Languages
English, Vietnamese
I help debug Node.js APIs, improve PostgreSQL performance and build reliable backend services. I have nearly three years of experience across 10+ production microservices using TypeScript, Express, PostgreSQL, MongoDB and Redis. My in-house work includes a database migration, reducing homepage load time from 4s to 1s, and messaging systems processing 113,000+ daily messages with RabbitMQ and Bull. I focus on clear scope, targeted fixes, relevant tests and practical handoff notes.
FAQ
Does the Basic package include a code fix?
No. Basic includes up to 60 minutes of investigation into one reproducible API issue and a written report. A confirmed root cause is not guaranteed within that time. I document what I checked and the recommended next steps.
What does one revision cover?
One revision covers corrections to the original agreed deliverable. New bugs, extra endpoints, new features or changed requirements need a separate scope. Each package covers one issue in one service.
What do you need before starting?
A runnable Node.js project, install and run instructions, exact reproduction steps and sanitized test data. Please confirm you have permission to share and modify the code. Use development or staging access with limited permissions.
Do you deploy to production or guarantee a speed improvement?
Production deployment is not included and requires separate scope after review. I do not guarantee a fixed speed improvement: performance work needs a measured baseline. The 4s-to-1s result in my description is a past project result, not a promise for your application.
What does the performance case study in your gallery show?
It summarizes in-house work at Ngoc Dung Beauty, around March 2024, taking about one week. Redis caching, PostgreSQL indexing and concurrent fetching reduced homepage load time from 4s to 1s. This is a past employment result, not a Fiverr order or a guarantee for your app.
