Hi, I'm
Amr Mohamed
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.
Senior Backend Engineer
Cairo, Egypt
Certifications & Professional Credentials
AWS Certified Solutions Architect – Associate (SAA-C03)
Validates expertise in designing distributed systems, cost-optimized architectures, and resilient applications on AWS infrastructure.
Verify CredentialBuilding 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
Back end developer
Oct 2025 — Present
BookLnk
Full stack developer
Jan 2025 — Sep 2025
Kashier
Full Stack Developer
Jul 2024 — Jan 2025
Outlier
Backend Developer
Sep 2023 — Jun 2024
Upwork
Full Stack Developer
Jan 2023 — Jun 2024
Tech Stack
Skills
Projects
01 / Featured Project
Booklnk
● Built the backend from scratch for a booking platform that supports multiple business types (barbershops, gyms, consultants). using NestJS and PostgreSQL. I owned the schema design, API layer, and service architecture ● Integrated Kashier for payments - webhook handling, transaction validation, reconciliation. The usual payment headaches, but got it working reliably ● Slot validation and conflict prevention was a surprisingly tricky problem. Ended up using optimistic locking to handle concurrent bookings
02 / Featured Project
Kashier
I worked as a Full Stack Developer at Kashier, where I designed and developed custom WooCommerce plugins, adhering to WordPress standards to ensure compatibility with the WooCommerce blocks feature and High-Performance Order Storage (HPOS). I enhanced technical documentation for APIs and plugins to better support merchant developers and played an active role in assisting them throughout the integration process with Kashier. Additionally, I maintained existing Kashier plugins, resolved bugs, and ensured overall system stability and user satisfaction.
03 / Featured Project
Outlier
Outlier is a dynamic educational platform focused on delivering quality, accessible learning experiences for students of all backgrounds. By combining engaging, interactive courses with real-time progress tracking and expert instruction, Outlier helps learners stay motivated and achieve their academic goals. Whether you’re exploring new subjects or deepening your knowledge, Outlier unlocks your potential and shapes a brighter future.
04 / Featured Project
promptify
I contributed to the frontend development of Promptify, leading the transformation of a React.js-based web application into a scalable and high-performance Next.js application. This migration significantly improved performance, enabled server-side rendering, and enhanced SEO capabilities. By leveraging Next.js’s built-in routing and API handling, I streamlined the development process, reduced technical debt, and delivered a more maintainable and efficient codebase. The result was a faster, more responsive application that provided users with a smoother and more engaging experience.
05 / Featured Project
Umedmi
Patient-Centered Healthcare Information System, presented as integrated medical platform for Clinic appointment reservation, medical record management , it is intended to have ISO 18308 & ISO 9001/2015 certification, being based on the international standardization of health record information architecture semantics
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
Upwork Client
“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
Software Company
“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
Software Company
“Fast & high quality work. Delivered a complex React component with pixel-perfect implementation and responsive design. Great communication throughout the project.”
Cupola Software
Software Company
Featured Blogs
Consulting & Backend Development Services
Available for high-impact backend and cloud projects.
Available for long-term collaborations and serious projects only.
Get in TouchContact Me
Whether you're hiring a senior backend engineer or building a cloud-based product, I'm open to impactful collaborations.
Contact Information
Open to new projects and senior backend roles.