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MuhammadHamza
@webdes1gner
Senior Ruby on Rails developer for payments, APIs and SaaS
Pakistan
Anglais, Ourdou
À propos de moi
Senior Ruby on Rails engineer with eight years in production Rails. I build systems that handle money and keep working when the internet doesn't: payment integrations (Stripe with 3D Secure, PayPal, Amazon Pay, Apple Pay, Google Pay), multi-tenant SaaS and API-only backends on PostgreSQL or MySQL. I'm the founder and sole engineer of Hajza, a booking and point-of-sale platform live with paying venues in Pakistan and the UAE, and a Senior Backend Engineer on restaurant reservation software. Every change ships with tests. Message me before ordering and I'll confirm scope, price and delivery.
Compétences
MuhammadHamza
hors ligne •
Voir mes services
API & Intégrations
I will do stripe integration, stripe connect, subscriptions and webhooks
API & Intégrations
I will build a rails backend, rest API or graphql API for your web or mobile app
Portfolio
Expérience professionnelle
Senior Backend Engineer
UMAI Restaurant Software • Freelance
Jul 2024 - Present • 2 yrs 4 mos
Backend engineering on UMAI's restaurant reservation system: the reservation call feature, waitlists and queue management, and the APIs behind them. Also database query optimization, code review and mentoring junior developers. Fully remote.
Senior Software Developer
K&W Media Consulting • Freelance
Oct 2022 - Feb 2025 • 2 yrs 4 mos
Remote contract role, engaged through D3velopers. Supported SaaS clients on a Rails and XSLT codebase: ongoing feature work, XML data processing, MySQL performance tuning, and payment gateway integrations with Stripe, Amazon Pay and PayPal.
Senior Software Engineer
Dubizzle Labs • Temps plein
Jan 2022 - Sep 2022 • 8 mos
Team lead across several product teams: requirements and architecture with the product team, delivery across backend and frontend, and mentoring junior developers.
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