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Hamza Zymawy

@hamzazymawy

Principal Engineer at Barakah App, architecting a food marketplace across 10+ services and building payment routing for multiple providers.

Saudi Arabia

Message

What I'm looking for

I’m seeking senior or principal engineering roles in Australia, particularly in fintech, payments, e-commerce, and platform teams.

At Barakah App, I own the technical stack behind a food-marketplace platform spanning 10+ backend services, a mobile app, and three web portals. I led a zero-downtime migration from a Koa.js monolith to NestJS microservices and engineered payment routing across multiple providers.

Previously, at Salla E-Commerce Platform, I led 12 engineers across order management and catalog systems, shaped the technical roadmap, and built payment-processing integrations. I’m seeking senior or principal engineering roles in Australia, particularly in fintech, payments, e-commerce, and platform teams.

Experience

Work history, roles, and key accomplishments

Current

Principal Engineer

Current

Barakah App

Apr 2025 - Present (1 year 6 months)

Architected a multi-application monorepo across 10+ services, led a zero-downtime migration to microservices, and engineered a payment routing layer with fraud detection and fallback routing.

NestJS Fastify React Native Angular Next.js MongoDB Redis RabbitMQ Clickhouse TigerBeetle AWS Docker CI CD Socket.IO Firebase Sentry Mixpanel Appsflyer ZATCA

Tech Lead

Salla E-Commerce Platform

Jun 2023 - Mar 2025 (1 year 9 months)

Led a team of 12 engineers owning the platform's PHP/Laravel order-management and catalog systems, and built payment-processing integrations.

PHP Laravel Technical Leadership Architecture Testing On Call Incident Response Payment Integration

Acting Team Lead

Salla E-Commerce Platform

Jan 2023 - Jun 2023 (5 months)

Coordinated a squad across Orders and Catalog domains, ran QA practice, and owned releases and deployments.

Sprint Planning Code Review QA Docker AWS CI CD

Software Engineer

Salla E-Commerce Platform

Jun 2021 - Jan 2023 (1 year 7 months)

Built event-driven microservices and platform features in PHP/Laravel, Node.js, NestJS and TypeScript, and wrote tests.

PHP Laravel NodeJS NestJS TypeScript MongoDB Redis RabbitMQ Clickhouse Testing

Backend Developer

Salla E-Commerce Platform

Apr 2020 - Jun 2021 (1 year 2 months)

Built backend services and REST APIs for order-management and catalog features, and integrated third-party payment services.

PHP Laravel NodeJS TypeScript MongoDB Redis RabbitMQ REST APIs

Web Developer

Salla E-Commerce Platform

Apr 2019 - Apr 2020 (1 year)

Built and maintained web application features in PHP/Laravel and JavaScript, and implemented merchant-facing UI components.

PHP Laravel JavaScript REST APIs Unit Testing

Professional Freelancer

Independent

Feb 2015 - Apr 2019 (4 years 2 months)

Delivered web and backend software projects for clients in Saudi Arabia and abroad.

Education

Degrees, certifications, and relevant coursework

University of London

Bachelor of Science (Honours), Computer Science

2020 - 2026

Grade: Second Class Honours, Upper Division (2:1)

Activities and societies: First author, peer-reviewed paper, International Journal of Advanced Computer Science and Applications (IJACSA), 2026, Scopus-indexed.

BSc (Hons) Computer Science, Second Class Honours, Upper Division (2:1), studied part-time alongside full-time employment. First author of a peer-reviewed paper in the International Journal of Advanced Computer Science and Applications (IJACSA), 2026.