Osama

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Osama Tahir

Senior Full-Stack Developer | Backend APIs & Payment Systems | Mobile (Flutter / React Native)

Dubai, UAE dxbsoftwaredeveloper@gmail.com +971507276823 /in/otahir21
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Professional Summary

Senior Full-Stack Developer with 6 years of experience building secure, high-availability backend services and cross-platform applications for fintech and enterprise clients across the UAE and GCC. Delivered 20+ production applications with 500K+ combined downloads; engineered REST APIs handling 10K+ daily requests at 99.9% uptime; integrated $1.2M+ in secure payment processing (Stripe, Apple Pay) with zero security breaches. Scrum Master Certified with hands-on experience mentoring engineers, leading Agile delivery, and owning systems end-to-end.

Core Skills

Backend Engineering
Laravel (PHP), Node.js, REST & GraphQL APIs, microservice and event-driven design, MySQL, Redis
Cloud & DevOps
AWS (EC2, S3, Lambda), Firebase, CI/CD pipelines, containers, performance tuning and caching
Payments & Integrations
Stripe, Apple Pay, PCI-aware payment flows, Google Analytics, secure API integration for fintech
AI & Emerging Tech
LLM API integration (OpenAI, Gemini), in-app chatbot features, AI-assisted development
Mobile & Frontend
Flutter (iOS/Android/Web), React Native, SwiftUI, Kotlin, Java (Android), BLoC, GetX
Leadership & Delivery
Agile/Scrum (SMC certified), code review, mentoring, stakeholder communication, architecture reviews

Professional Experience

Senior Full-Stack Developer (Flutter Web & Mobile)

Jun 2025 – Present

Metatech · Dubai, UAE

  • Architected a Flutter Web CRM with real-time analytics dashboards, cutting client reporting time by 60%.
  • Designed and maintained Laravel REST APIs handling 10K+ daily requests at 99.9% uptime, powering Stripe and Google Analytics integrations.
  • Mentored 3 junior developers through code reviews and Agile training, lifting team productivity by 25%.
  • Reviewed and challenged system designs, driving modular architecture and caching decisions that improved API response times by 40%.

Tech: Flutter Web, Laravel, MySQL, Redis, BLoC, Stripe, Google APIs

Senior Mobile Developer (Flutter/React Native) | Laravel API Specialist

Jul 2023 – Jun 2025

Prism Digital · Dubai, UAE

  • Led development of 6+ high-performance apps (Flutter/React Native) with 200K+ downloads and 4.7/5 average store ratings.
  • Engineered Laravel REST APIs sustaining 5K+ requests/minute; reduced latency by 40% through Redis caching and query optimization.
  • Integrated Stripe and Apple Pay for 3 fintech applications, processing $1.2M+ in transactions with zero security breaches.
  • Mentored 2 junior developers and introduced Agile workflows, cutting project delivery time by 30%.

Tech: Flutter, React Native, Laravel, Firebase, Stripe, GetX, MySQL

Lead Flutter Developer | Cross-Platform Apps & API Integration

Dec 2021 – May 2023

Freelancer.com (Independent Contractor) · Islamabad, Pakistan

  • Delivered 12+ Flutter applications for global clients with 100% on-time delivery and 4.9/5 client satisfaction.
  • Integrated REST APIs (Firebase/Node.js), improving app responsiveness by 35% through optimized data fetching.
  • Designed UI/UX for 8 apps, boosting user engagement by 45%; maintained <1% crash rate via rigorous testing.

Tech: Flutter, Firebase, Node.js, GetX, Stripe, Google Maps API

Mobile App Developer Intern (Android/iOS) | PHP Backend

Jun 2020 – Nov 2021

Soft Code Labs · Islamabad, Pakistan

  • Developed 5+ Android/iOS apps with 50K+ downloads and 4.5/5 ratings.
  • Built Core PHP APIs, reducing data sync time by 30% through query optimization; deployed to Google Play and App Store with full store-guideline compliance.

Tech: Java, Swift, Core PHP, MySQL, Firebase

Key Achievements

  • Processed $1.2M+ in secure payments (Stripe/Apple Pay) for UAE & KSA fintech apps — zero security breaches.
  • Reduced enterprise API response times by 40% and client reporting time by 60% through architecture and caching improvements.
  • Shipped 20+ production applications with 500K+ combined downloads and 4.8/5 average ratings.
  • Improved team productivity by 25% and delivery speed by 30% through mentoring and Agile leadership.

Education & Certifications

B.E. Computer Software Engineering

Foundation University Islamabad (FUI)

2018 – 2022

  • Scrum Master Certified (SMC)
  • Introduction to Android Mobile Application Development
  • Introduction to Containers
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