You will get a Node.js and MongoDB REST API backend built for your app
Project details
You will get a clean, documented Node.js and MongoDB REST API backend that your web or mobile app can plug straight into.
I am a backend developer with five years of experience running Node.js services in production. I have scaled a backend from 200,000 to over a million users and cut average API response time by around sixty percent by fixing indexes, queries and caching. That is the same approach I bring to your project.
What I build: REST endpoints with Express, MongoDB schemas with Mongoose and proper validation, JWT authentication with roles and refresh tokens, file upload, email, pagination, filtering and search, third-party API integrations, and admin endpoints. On the higher tier I add Redis caching, correct indexing, structured logging, tests, Docker and deployment.
What you receive: full source code, a Postman collection or Swagger docs, environment setup instructions, and a walkthrough so your team can pick it up without me.
Tell me what your app does before ordering and I will tell you which tier fits.
I am a backend developer with five years of experience running Node.js services in production. I have scaled a backend from 200,000 to over a million users and cut average API response time by around sixty percent by fixing indexes, queries and caching. That is the same approach I bring to your project.
What I build: REST endpoints with Express, MongoDB schemas with Mongoose and proper validation, JWT authentication with roles and refresh tokens, file upload, email, pagination, filtering and search, third-party API integrations, and admin endpoints. On the higher tier I add Redis caching, correct indexing, structured logging, tests, Docker and deployment.
What you receive: full source code, a Postman collection or Swagger docs, environment setup instructions, and a walkthrough so your team can pick it up without me.
Tell me what your app does before ordering and I will tell you which tier fits.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$250
|
Standard
$550
|
Advanced
$1,100
|
|---|---|---|---|
| Delivery Time | 5 days | 9 days | 14 days |
Number of Revisions | 0 | 0 | 0 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
About Shahid
Blockchain Backend Developer | Solidity, Node.js
Islamabad, Pakistan - 5:49 pm local time
Two things I do well: I build the smart contracts and backend services behind Web3 products, and I test mobile apps the way someone who has shipped them tests them.
WHAT I HAVE SHIPPED
• DOP — Data Ownership Protocol: backend services for a privacy protocol that raised $185M in its private sale and grew to 300M+ users. Killed API timeouts and high MongoDB CPU with indexing and Redis caching. Removed RPC downtime by integrating 5 providers with randomized selection and automatic failover.
• Tomi: Solidity smart contracts and Node.js services for a Web3 ecosystem with 1M+ users. The TOMI token went from $0.10 to $7 after launch.
• TheCryptoBasic: backend for a crypto news and market-data platform serving 2M+ users.
• Rain: backend contribution to a blockchain project that raised $1M in its private sale.
• CV Maker (Google Play): scaled a Node.js backend from 200K to 1M+ users and cut average API response time by around 60 percent.
• Arrow Maze Pro: my own iOS puzzle game, built in SwiftUI and published on the App Store.
BLOCKCHAIN & BACKEND
• Smart contracts — ERC-20, ERC-721, ERC-1155, staking, vesting, presale and launchpad, NFT minting, token distribution
• Web3 backend — Node.js, Express, MongoDB, Redis, REST APIs, event listeners, indexers, wallet authentication
• dApp integration — ethers.js and web3.js, multi-RPC failover, transaction monitoring and retries
• Performance rescue — slow APIs, database timeouts, high CPU, memory leaks at scale
• Production firefighting — failed payments, dropped transactions, JWT and session bugs, silent errors
MOBILE APP TESTING & QA
• Google Play closed testing — 12 real testers on real devices, continuous 14-day opt-in, genuine in-app activity, plus a written feedback report for your production review submission
• Functional, smoke and regression testing on real Android and iOS devices
• UI and layout testing across screen sizes and OS versions
• Payment, login and session-flow testing — I have fixed those exact bugs in production myself
• API testing with Postman, because most app bugs start below the UI
• Bug reports with steps to reproduce, expected vs actual, screenshots, screen recordings, device and OS details
• Test case documentation and a clear test summary report
I worked as an SQA Engineer for a year and a half before moving into backend development, so testing is not a side gig for me.
TECH
Solidity, Node.js, Express.js, MongoDB, Mongoose, Redis, JavaScript, TypeScript, ethers.js, web3.js, SwiftUI, Postman, Google Play Console, TestFlight, Git.
I reply within a few hours and work 30+ hrs/week. Message me what you are building or what you need tested, and I will tell you honestly if I am the right fit and how long it will take.
Steps for completing your project
After purchasing the project, send requirements so Shahid can start the project.
Delivery time starts when Shahid receives requirements from you.
Shahid works on your project following the steps below.
Revisions may occur after the delivery date.
Build, test and hand over
I agree the endpoints and data model with you, build and test the API, share a Postman collection for your review, then deploy and hand over the code and docs.