Available for new projects

Hi, I'm

Amr Mohamed

Senior Backend Engineer

AWS Certified Solutions Architect – Associate (2026)

I studied dentistry for five years, but halfway through I started learning to code as a hobby and couldn't stop. Five years of backend later: ad-tech, fintech, healthcare. The problems I enjoy most are the ones other people avoid.

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Senior Backend Engineer

Cairo, Egypt

Open to work

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Credentials

Certifications & Professional Credentials

Amazon Web Services2026

AWS Certified Solutions Architect – Associate (SAA-C03)

Validates expertise in designing distributed systems, cost-optimized architectures, and resilient applications on AWS infrastructure.

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My Journey

Building Systems That Actually Work

I build backend systems that work in real production - not just in theory.

Over the past 5+ years, I’ve worked across fintech, healthcare, and SaaS, building and improving systems where performance and reliability actually matter.

I mainly work with Node.js and NestJS, focusing on clean architecture, database performance, and designing services that scale without becoming hard to manage. I care about the details that make systems stable in production — proper monitoring, solid CI/CD, and predictable deployments and production-grade deployment strategies.

I also pay close attention to business impact. Whether it’s reducing infrastructure cost, improving performance, or simplifying workflows, I aim to build systems that make a real difference, not just “work”..

Work Experience

Timeline

Thunder

Senior Backend Engineer

Oct 2025 — Present

BookLnk

Backend Engineer

Jan 2025 — Sep 2025

Kashier

Integration Engineer

Jul 2024 — Jan 2025

Outlier

Backend Engineer

Sep 2023 — Jun 2024

UmedMi

Backend Engineer

Mar 2020 — Aug 2023

Tech Stack

Skills

JavaScript

TypeScript

java

Node.js

express.Js

Nest.js

serverless

Amazon Web services (AWS)

MongoDb

MySql

PostgreSql

Docker

Redis

Jest

Git

rabbitmq

Portfolio

Projects

01 / Featured Project

Umedmi

Built a patient management platform from scratch — schema design, API, AWS infrastructure, ICD-10 medical code engine, real-time chat, and payment integration. Three years of real healthcare system engineering.

Built a comprehensive patient management system from the ground up — defined the data model, designed the API layer, and set up the cloud infrastructure for a healthcare platform handling sensitive medical data

Designed and implemented an ICD-10 medical code parsing engine that transformed complex diagnostic codes into searchable, interactive cards. Reduced clinical data lookup time for healthcare providers meaningfully

TypeScriptJavaScriptNode.jsNest.jsAmazon Web services (AWS)MongoDbGitRedis

Case Study

02 / Featured Project

Outlier

Backend performance work on an edtech platform — cut a 3-minute cronjob to 45 seconds, dropped average query time by 40%, and built the student account merge tool nobody wanted to touch.

Optimized a complex cronjob that was running for 3 minutes in production. Profiled it, rewrote the bottleneck, got it to 45 seconds. The kind of fix that feels obvious in hindsight

Executed database query optimizations across several high-traffic endpoints — 40% reduction in average query time, which showed up directly in user-facing response times

Node.jsexpress.JsRedisJavaScriptPostgreSqlGit

Case Study

03 / Featured Project

Kashier

Payment infrastructure work — WooCommerce plugins used by thousands of merchants, a URL shortener that cut SMS costs by 25%, and the documentation that made the whole thing easier to integrate.

Maintained WooCommerce payment plugins serving thousands of active merchants — a lot of careful bug-fixing to keep things working across the block editor and HPOS without breaking existing integrations

Built a URL shortener service that ended up saving ~25% on SMS costs platform-wide. Sounds like a small project, but when SMS volume is high the savings are real

TypeScriptJavaScriptexpress.JsNode.jsMongoDbrabbitmq

Case Study

04 / Featured Project

Booklnk

Multi-tenant appointment booking backend serving barbershops, gyms, and consultants — built from scratch on NestJS + PostgreSQL. I owned the architecture end-to-end.

Built the backend from scratch for a multi-tenant booking platform on NestJS and PostgreSQL — supporting barbershops, gyms, and consultants from a single codebase. Owned the schema design, service architecture, and the full API layer

Integrated Kashier (Egyptian payment gateway) end-to-end: webhook ingestion, idempotent transaction validation, and reconciliation logic. Shipping payments is always messier than the docs make it look

JavaScriptTypeScriptNode.jsNest.jsDockerPostgreSql

Case Study

Writing about backend engineering, system design, and lessons from production.