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Nederlands
$
USD
Usama Yaseen
@usamayaseen_
Level 1
Senior React Native Engineer, Team Lead, 20M USD Payroll System
Pakistan
Engels, Urdu
Over mij
Senior React Native Engineer & Team Lead. I led engineering on MoM by AIO, 50+ US restaurants, $20M+ payroll processed. Also: BBC World Service app (1M+ users), WalletX crypto wallet (50K+ downloads), and Karawan, a startup I founded solo.
I build iOS & Android apps: startup MVPs, fintech systems, real-time features, Firebase & AWS backends. AI-accelerated workflow, faster delivery, no corners cut.
Message me with your idea. I scope honestly and respond within hours.
Skills
Usama Yaseen
offline •
Gemiddelde reactietijd: 1 uur
Bekijk mijn diensten
Platformonafhankelijke development
I will build your react native ios and android app with firebase
App design
I will design a mobile app
Portfolio
Werkervaring
Team Lead & Senior Software Engineer
AIO • Fulltime
Feb 2024 - Present • 2 yrs 7 mos
Led engineering on MoM by AIO, a restaurant management platform live on the App Store with 50+ US restaurants. Architected fintech payroll system (NestJS + AWS) processing $20M+ annually — completes payroll for 1000 employees in 30 seconds, 60x faster than competitors. Reduced production incidents by 95% through codebase rebuild and architectural improvements. Built real-time order sync and payment routing for Doordash, Uber Eats & GrubHub integrations. Implemented dual payment processing (Adyen & Stripe) with zero-downtime migration. Rearchitected backend using AWS Lambda/SQS/SNS for async processing and scalability.
13 Reviews
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Always exceeding expectations and understanding the problem while delivering results.
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It was a pleasure working with usama. He quickly grasped the requirements and delivered efficiently. I would definitely recommend him for any future projects.
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Provided thorough understanding of the project and brings insight to implement solutions.
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