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Fiverr Pro
English
$
USD
I will debug or develop custom nodejs rest apis or websockets servers
John H
About this gig
Need bulletproof backend code that just works or have a bug that's eating your weekends?
I'm a senior Node.js engineer (8 yrs, 150+ shipped APIs/WebSockets) who fixes or builds from scratch:
Here is what I offer
- Zero-downtime bug fix with regression test
- Clean REST scaffoldExpress/Fastify/Nest, JWT, joi, Swagger
- Real-time bidirectional serverSocket.IO, ws, uWebSockets, Redis adapter
- Horizontal cluster, PM2, graceful shutdown, rate-limit, helmet
- Docker & docker-compose ready for AWS/GCP/Heroku
- 80 % Jest/Mocha coverage + GitHub Action CI
- Prometheus metrics, structured logs
Why me?
0-downtime deployments; I sign NDA gladly
Fixed-price or hourly, source code delivered in Git repo you own
Your deadline is sacred; your repo stays yours; your review will be my next trophy.
Message now, sleep tonight while I push the green works on my machine.
Get to know John H
John H
- FromUnited States
- Member sinceOct 2025
- Avg. response time1 hour
Languages
English
I am a skilled Software Engineer with strong expertise in software development using Nodejs and Python. For the past 6 years, I’ve specialized in building powerful and efficient backend systems with Nodejs. I also bring over 6 years of experience in transforming XML, JSON, and Excel data using XSLT, XPath, and XQuery. Whether you need a backend developer or an expert in complex XML workflows, I’m confident in delivering high-quality, reliable solutions. Feel free to reach out to discuss your project needs.
Other Software Development Services I Offer
FAQ
Do you use TypeScript or plain JS?
I write strict TypeScript with inferred types; you’ll get a tsconfig and compiled JS in /dist
Can you integrate with my Firebase/Supabase auth?
Absolutely swap JWT verifier for Firebase Admin SDK or Supabase createClient in minutes.
How do you handle DB migrations?
Knex or Prisma, zero-downtime blue-green, rollback script included.
Which Node versions do you support?
14 → 22 LTS; I lock engines field and ship native ES modules if needed.
