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I will fix a node js or nestjs API bug and add a regression test
Jeronimo M
About this gig
An endpoint fails, a webhook runs twice, or a background job stops where it should continue. I debug Node.js and NestJS backends and implement a focused fix.
This package covers one small, reproducible API bug in an existing project. I can work on endpoint logic, webhook handling, database queries or job state.
You receive:
- A focused code change for the agreed issue
- An automated regression test and instructions to run it
- A short explanation of the cause and any remaining limitations
I've built and maintained production backend and full-stack software, including NestJS APIs, PostgreSQL, Redis, persistent jobs, media processing and payment integrations.
Please message me before ordering with the expected behaviour, actual behaviour and steps to reproduce. The project needs a safe local or staging setup. Redact credentials and personal data from logs and examples.
New features, major refactors, multiple unrelated bugs and production deployment are outside this package.
Get to know Jeronimo M
Jeronimo M
Full Stack Web Developer, APIs, AI Integrations and Automation
- FromArgentina
- Member sinceOct 2026
- Avg. response time1 hour
Languages
Spanish, English
I build websites, web apps, backend APIs and AI integrations with TypeScript and Python. I've worked in software and automation since 2021, including production applications.
I built Farmium end to end: Vue/NestJS, PostgreSQL, background jobs, a visual workflow editor, media processing and Stripe payments. My research collaborations cover RF signal classification, thermal-image analysis and scientific NLP.
I can fix an API bug, build a web product or automate a manual process. Message me with your current setup and what needs to work. We'll agree on scope before you order.
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FAQ
What should I send before ordering?
Describe expected and actual behaviour, steps to reproduce, your Node.js or NestJS versions, and the relevant code. Use a safe local or staging setup and redact credentials and personal data. Please message me first so we can confirm the scope.
What is included in the basic package?
One small, reproducible API bug: investigation, a focused fix, a regression test and short verification notes. One revision addresses the agreed issue. New features, major refactors, unrelated bugs and production deployment need a separate scope.
Can you work with PostgreSQL Redis and webhooks?
I've used these in backend systems with persistent jobs and payment integrations. I'll check how they are used in your project and whether the issue fits this package.
Will you need access to production?
The standard package uses a safe local or staging reproduction. A live deployment or production access requires a separate agreement. Please do not send production credentials in your initial message.
