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Usama Yaseen
@usamayaseen_
Senior React Native Engineer, Team Lead, 20M USD Payroll System
Pakistan
English, Urdu
About me
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 •
See my services
Cross-Platform Development
I will build your react native ios and android app with firebase
App Design
I will design a mobile app
Portfolio
Work experience
Team Lead & Senior Software Engineer
AIO • Full-time
Feb 2024 - Present • 2 yrs 6 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.
12 Reviews
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Rating Breakdown
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- Quality of delivery
- Value of delivery
1-5 out of 12 Reviews
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johanletelie652
Repeat Client
United States
Always exceeding expectations and understanding the problem while delivering results.
Helpful?
devsquads
Pakistan
It was a pleasure working with usama. He quickly grasped the requirements and delivered efficiently. I would definitely recommend him for any future projects.
Helpful?
johanletelie652
Repeat Client
United States
Provided thorough understanding of the project and brings insight to implement solutions.
$50-$100
Price
4 days
Duration
Helpful?
johanletelie652
Repeat Client
United States
Helpful?
johanletelie652
Repeat Client
United States
Very wellspoken and pays attention to detail. Willing to apply logic and understand how to provide solutions for problems.
Helpful?
