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Usama Yaseen
@usamayaseen_
Level 1
Senior React Native Engineer, Team Lead, 20M USD Payroll System
Pakistán
Inglés, Urdu
Sobre mí
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.
Habilidades
Usama Yaseen
desconectado •
Tiempo medio de respuesta: 1 hora
Revisa mis servicios
Desarrollo de multiplataforma
I will build your react native ios and android app with firebase
Diseño de aplicaciones
I will design a mobile app
Porfolio
Experiencia laboral
Team Lead & Senior Software Engineer
AIO • Tiempo completo
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.
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