Available for freelance

Mahmoud Rahmanbuilds the full stack.

Six years shipping production apps on MongoDB, Express, React and Node — from schema design and streaming APIs to interfaces that stay fast on a bad connection.

View selected work Start a project

6+: Years shipping
40+: Apps delivered
99.9%: Uptime maintained

const dev = {
  stack: "MERN",
  focus: "realtime",
  tz: "UTC+2"
}

MongoDBExpressReactNode.jsTypeScriptNext.jsGraphQLRedisSocket.IODockerAWSPrismaMongoDBExpressReactNode.jsTypeScriptNext.jsGraphQLRedisSocket.IODockerAWSPrisma

01 — About

Backend depth, frontend obsession.

I design and build end-to-end JavaScript products: normalized Mongo collections and aggregation pipelines underneath, expressive Express and Node services in the middle, and React interfaces that feel instant on top.

Most of my work lives in the messy middle — auth flows, background jobs, websocket fan-out, caching layers and the migrations nobody wants to own. I like owning them.

Lately: streaming AI responses through Node, edge-deployed React, and shaving p95 latency below 120ms on read-heavy dashboards.

LocationCairo · Remote worldwide
FocusRealtime & data-heavy apps
Availability2 project slots / quarter
ResponseWithin 24 hours

02 — Stack

Four letters, one continuous runtime.

MongoDB

Schema design, aggregation pipelines, sharding, Atlas search, index tuning.

92% depth

Express

REST + RPC services, middleware pipelines, JWT/OAuth, rate limiting, queues.

95% depth

React

React 19, TanStack Query & Router, suspense data flow, design systems.

97% depth

Node.js

Streams, workers, Socket.IO fan-out, Redis caching, observability.

94% depth

03 — Selected work

Systems that stayed in production.

Nexus Commerce

2026

Headless storefront with a Node order engine, Mongo inventory ledger and sub-second search across 180k SKUs.

+38% conversion

React
Node
MongoDB
Redis

PulseBoard

2025

Realtime analytics console streaming 12k events/minute through Socket.IO with rollup aggregation pipelines.

12k events/min

Socket.IO
Express
TypeScript

Ledgerly

2025

Multi-tenant fintech back office with double-entry accounting, audit trails and role-scoped access.

SOC2-ready

MERN
JWT
Docker

Atlas Chat

2024

Streaming AI assistant over a Node gateway with token-by-token React rendering and message persistence.

p95 120ms

Node
Streams
React

04 — Path

Where the hours went.

2023 — Present
Lead Full-Stack Engineer · Northwind Labs
Owning the MERN platform behind four client products; cut infra cost 34% by replacing polling with websockets.
2021 — 2023
Senior Node Developer · Bitcraft Studio
Built the payments and subscription core, plus an event pipeline handling 9M documents a month.
2020 — 2021
Frontend Engineer · Freelance
Shipped 20+ React interfaces for agencies, standardising a shared component library across projects.

05 — Contact

Got a stack that needs shipping?

Tell me about the product, the deadline and the part that's currently breaking. I reply within a day.

hello@mahmoud.dev GitHub LinkedIn