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You will get a custom REST API built with Node.js, Express, and TypeScript

Sos M.Status: Offline
Sos M. Sos M.
5.0
Rising Talent
Preview imagePreview imagePreview image

Let a pro handle the details

Buy Web Application Programming services from Sos, priced and ready to go.
Sos M.Status: Offline
Sos M. Sos M.
5.0
Rising Talent
Preview imagePreview imagePreview image

Let a pro handle the details

Buy Web Application Programming services from Sos, priced and ready to go.

Project details

I build custom REST APIs with Node.js, Express, and TypeScript — the same stack I used to build Spring (getspring.io), a production SaaS platform for sales commission management. Every API I deliver comes with clean, typed code, PostgreSQL database with Prisma ORM, proper error handling, input validation, and documentation. I've built OAuth integrations with QuickBooks and Google, JWT authentication systems, and role-based access control — all running in production on AWS. You get production-quality code, not a prototype.
Programming Languages
JavaScript, TypeScript
Coding Expertise
Performance Optimization, Security
What's included
Service Tiers Starter
$150
Standard
$350
Advanced
$750
Delivery Time 4 days 7 days 14 days
Number of Revisions
123
Design Customization
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Content Upload
-
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Responsive Design
-
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Source Code
Optional add-ons You can add these on the next page.
Additional Revision
+$25

Frequently asked questions

5.0
1 review
100% Complete
(1)
1% Complete
(0)
1% Complete
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1% Complete
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UO

Uri O.
5.00
Apr 10, 2026
AI Developer for Financial and Customer Management Tools Fabulous brilliant hard working and diligent fullstack engineer will work with Sos again soon.
Sos M.Status: Offline

About Sos

Sos M.Status: Offline
AI Agent & Backend Engineer | MCP, LLM Pipelines, Node/TypeScript
5.0  (1 review)
Lviv, Ukraine - 3:44 pm local time
I build AI agent systems and the backends they run on.

Right now I run production work for a short-term rental company (US): AWS Lambda services, an LLM extraction pipeline on AWS Bedrock that turns messy booking data into structured fields, and an agent runtime with a Slack bot that staff use daily. Node.js, TypeScript, NestJS, Prisma, Postgres/MySQL/Mongo, Docker, GitHub Actions.

I also built and shipped Maestro — my own orchestration app for AI coding agents. Electron desktop client, NestJS + PostgreSQL API on a VPS, migrations, schedules, persistent state. It drives Claude Code and Codex agents against real repositories. I use it every day on client work.

Hire me for:
→ AI agents that do real work — tool use, MCP servers, orchestration, guardrails, not demos
→ LLM pipelines: extraction, classification, structured output, evals
→ Backends and APIs: REST, OAuth 2.0 / JWT / RBAC, third-party integrations, Postgres + Prisma
→ Getting it deployed: AWS, Docker, VPS, CI/CD

Before code I ran a manufacturing business and a food brand into national retail. That's why I ask what the thing is for before I build it, and why I tell you when a feature isn't worth the money.

Steps for completing your project

After purchasing the project, send requirements so Sos can start the project.

Delivery time starts when Sos receives requirements from you.

Sos works on your project following the steps below.

Revisions may occur after the delivery date.

Project scoping

Review requirements, clarify endpoints, define database schema, agree on timeline

Database and project setup

Set up TypeScript project, configure PostgreSQL with Prisma, create migrations

Review the work, release payment, and leave feedback to Sos.