Available for new projects

Hi, I'm

Amr Mohamed

Senior Backend Engineer
AWS Certified Solutions Architect – Associate (2026)

I build backend systems that handle real production load, reduce costs, and stay reliable at scale. Reduced SMS costs by 25% and optimized high-traffic systems across fintech and SaaS.

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Amr Mohamed

Senior Backend Engineer

Cairo, Egypt

Open to work
Credentials

Certifications & Professional Credentials

AWS Certified Solutions Architect
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.

Verify Credential
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., proper monitoring, 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

Thunder

Back end developer

Oct 2025 — Present

BookLnk

BookLnk

Full stack developer

Jan 2025 — Sep 2025

Kashier

Kashier

Full Stack Developer

Jul 2024 — Jan 2025

Outlier

Outlier

Backend Developer

Sep 2023 — Jun 2024

Upwork

Upwork

Full Stack Developer

Jan 2023 — Jun 2024

More on LinkedIn

Tech Stack

Skills
TypeScript
TypeScript
java
java
JavaScript
JavaScript
serverless
serverless
express.Js
express.Js
Nest.js
Nest.js
Node.js
Node.js
Amazon Web services (AWS)
Amazon Web services (AWS)
Docker
Docker
MongoDb
MongoDb
PostgreSql
PostgreSql
Redis
Redis
MySql
MySql
Jest
Jest
rabbitmq
rabbitmq
Git
Git
Portfolio

Projects

01
Booklnk

01 / 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
02
Kashier

02 / 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
03
Outlier

03 / 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
04
Promptify

04 / Featured Project

Promptify

Led the React → Next.js migration for a prompt management platform. Proper SSR, cleaned up the routing mess, and organic traffic went up 50% after the SEO improvements landed.

Led the full migration from React SPA to Next.js — the old architecture had client-side-only rendering which was killing SEO and making the initial load sluggish

Implemented SSR and SSG where appropriate, keeping client-side hydration only where interactivity required it. The result was faster TTFBs and proper page indexing

TypeScript
Case Study
05
Umedmi

05 / 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
Client Feedback

Client Feedback

Real feedback from verified clients on Upwork. Every review is linked to the actual project and client profile for full transparency.

“Amr is fantastic to work with. He works fast, professionally, and does quality work — exactly as requested in the scope. Delivered custom Ghost theme modifications on time with clean, maintainable code. Awesome job!”
optiontwelve

optiontwelve

Upwork Client

Ghost Theme Customization
“Excellent work on building a PTO React component within our Nx monorepo. Implemented comprehensive Cypress E2E tests and Storybook documentation. Component is production-ready with 100% test coverage.”
Cupola Software

Cupola Software

Software Company

React Component + Testing Suite
“Amr is quick with React components and experienced with Cypress, Storybook, and Jest within a Nx build system. Built multiple reusable components that saved us weeks of development time.”
Cupola Software

Cupola Software

Software Company

Enterprise Component Library
“Fast & high quality work. Delivered a complex React component with pixel-perfect implementation and responsive design. Great communication throughout the project.”
Cupola Software

Cupola Software

Software Company

Frontend Development
For Clients

Consulting & Backend Development Services

Available for high-impact backend and cloud projects.

Backend system architecture
AWS infrastructure design
API development
Performance optimization
Payment system integrations

Available for long-term collaborations and serious projects only.

Get in Touch
Get In Touch

Contact Me

Whether you're hiring a senior backend engineer or building a cloud-based product, I'm open to impactful collaborations.

Contact Information

Location

Cairo, Egypt

Available

Open to new projects and senior backend roles.