You will get REST API built with Node.js and Express, documented and ready to deploy
Project details
Need an API that actually works when real money and real users are on the line?
I'm a backend engineer who's built production APIs handling live payments and e-commerce traffic, including Stripe and Mercado Pago integrations as CTO of a SaaS startup that went from zero to paying customers.
For example, if you're launching a marketplace or subscription product, I can set up your user accounts, product or order endpoints, and a secure checkout flow in days, not weeks. Every API I deliver includes proper route structure, input validation, clear error handling, and documentation your team can actually use, built with Node.js and Express on MongoDB, PostgreSQL, or MySQL depending on what fits your project.
Send me your requirements and I'll confirm the scope before we start, so you know exactly what you're getting and when
Check my portfolio for the exact approach: an open-source Stripe + PayPal adapter with 70%+ test coverage.
I'm a backend engineer who's built production APIs handling live payments and e-commerce traffic, including Stripe and Mercado Pago integrations as CTO of a SaaS startup that went from zero to paying customers.
For example, if you're launching a marketplace or subscription product, I can set up your user accounts, product or order endpoints, and a secure checkout flow in days, not weeks. Every API I deliver includes proper route structure, input validation, clear error handling, and documentation your team can actually use, built with Node.js and Express on MongoDB, PostgreSQL, or MySQL depending on what fits your project.
Send me your requirements and I'll confirm the scope before we start, so you know exactly what you're getting and when
Check my portfolio for the exact approach: an open-source Stripe + PayPal adapter with 70%+ test coverage.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$89
|
Standard
$249
|
Advanced
$499
|
|---|---|---|---|
| Delivery Time | 2 days | 4 days | 7 days |
Number of Revisions | 1 | 1 | 2 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$25 - $75
Additional Revision
+$25
Extra endpoint
(+ 1 Day)
+$25Frequently asked questions
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DS
Diana S.
Aug 16, 2026
Test an Express.js Error Handling Library & Provide an Honest Developer Review
Juan is truly a professional in his field. It was a real pleasure working with him. He took the task very seriously and paid great attention to detail! I was also delighted by his honest and insightful feedback, which helped me understand so much about my library! If you need someone who will approach the task responsibly, attentively and professionally, then I’d say that’s Juan. I highly recommend him!
About Juan Jose
Backend Developer - Node.js & API integrations | Available Now
Lima, Peru - 10:12 am local time
I've shipped Stripe, Paypal and Mercado Pago integrations for platforms handling real transactions.
Built APIs that process thousands of requests daily at scale.
Quick wins I deliver:
- Production-ready APIs (REST, GraphQL) - no rework needed
- Payment gateway integrations (Stripe, Mercado Pago, Paypal, etc)
- Database optimization (PostgreSQL, MongoDB) - faster queries, lower costs
- Docker & AWS deployment - infrastructure that scales
6+ years freelance + CTO experience. Available now.
Let's ship your feature on time and under budget.
Steps for completing your project
After purchasing the project, send requirements so Juan Jose can start the project.
Delivery time starts when Juan Jose receives requirements from you.
Juan Jose works on your project following the steps below.
Revisions may occur after the delivery date.
Share Your Requirements
You send me the endpoints, data, and auth needs — I confirm the scope before starting
Build the Backend
I set up Node.js and Express, connect your database, and build each endpoint with validation and error handling