You will get production-ready REST API built with Node.js and TypeScript
Project details
I'll design and build a REST API that's production-ready — not a prototype.
Every project includes strict input validation on all endpoints, proper error handling with meaningful error codes, rate limiting, and a standardized response format. I work with Fastify (or Express if you
prefer), TypeScript, and MySQL/PostgreSQL with Knex or Prisma.
I built and run a production SaaS platform whose API serves both a web frontend and HMAC-authenticated B2B partner integrations — I apply the same standards to your project.
What you get:
• Fully typed TypeScript codebase, no shortcuts
• Database schema design and migrations
• Auth (JWT, API keys, or HMAC request signing)
• API documentation
• Deployment-ready setup
Send me your spec and I'll confirm scope and timeline within 24 hours.
Every project includes strict input validation on all endpoints, proper error handling with meaningful error codes, rate limiting, and a standardized response format. I work with Fastify (or Express if you
prefer), TypeScript, and MySQL/PostgreSQL with Knex or Prisma.
I built and run a production SaaS platform whose API serves both a web frontend and HMAC-authenticated B2B partner integrations — I apply the same standards to your project.
What you get:
• Fully typed TypeScript codebase, no shortcuts
• Database schema design and migrations
• Auth (JWT, API keys, or HMAC request signing)
• API documentation
• Deployment-ready setup
Send me your spec and I'll confirm scope and timeline within 24 hours.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$150
|
Standard
$450
|
Advanced
$1,100
|
|---|---|---|---|
| Delivery Time | 7 days | 14 days | 30 days |
Number of Revisions | 1 | 0 | 0 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
OpenAPI/Swagger documentation
(+ 2 Days)
+$75
Deployment setup (VPS/Docker)
(+ 2 Days)
+$100
Extra endpoint
(+ 1 Day)
+$25Frequently asked questions
About Fethan
Full-Stack TypeScript Developer | Node.js APIs, Binary File Processing
Kahramanmaras, Turkey - 8:49 am local time
I designed and shipped a complete SaaS platform for the chiptuning industry: a binary analysis engine that parses ECU firmware files (Bosch EDC/MD1/MG1 families), detects and manages DTC fault codes at the binary level, and matches files against a fingerprint library covering 95+ ECU types — plus the full stack around it: Fastify REST APIs with HMAC-authenticated B2B endpoints, a Next.js frontend in 9 languages, and an Electron desktop client with hardware dongle integration.
What I bring to your project:
- Binary file parsing, hex-level analysis, checksum handling, reverse engineering
- Node.js / TypeScript backends (Fastify, Knex, Prisma, MySQL/PostgreSQL, Redis)
- Next.js / React frontends, i18n, Tailwind
- Electron desktop apps talking to real hardware
- API security: HMAC signatures, rate limiting, quota systems
I work with written specs and async communication, and I deliver production-ready code — validated inputs, proper error handling, tests.
If your project involves file formats, protocols, or APIs that need to work exactly right — let's talk.
Steps for completing your project
After purchasing the project, send requirements so Fethan can start the project.
Delivery time starts when Fethan receives requirements from you.
Fethan works on your project following the steps below.
Revisions may occur after the delivery date.
Scope review & confirmation
I review your answers, confirm the final endpoint list and timeline within 24 hours, and flag anything unclear before work starts.
Database & API design
I design the schema, migrations, and endpoint structure and share it with you for approval before writing code.