Senior Mobile Engineer

Hamza Zafar

Senior React Native Developer | Full Stack Mobile Engineer

Building Scalable Apps, One Commit at a Time

Senior React Native Developer & Full Stack Mobile Engineer. 6+ years building iOS and Android apps with React Native, TypeScript, and Node.js. 50+ production apps shipped focused on performance, clean architecture, and on-time delivery.

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Hamza Zafar
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Experience

Experience

Results-driven Full Stack Mobile Engineer with 6+ years of experience building high-performance cross-platform iOS and Android apps using React Native. Delivered 50+ production applications, improving stability by 70%+ and reducing load times by 50%+. Specialized in TypeScript, Redux/Zustand, Firebase/Supabase, and scalable backend systems (Node.js/NestJS, GraphQL). Proven track record of leading teams, maintaining 60 FPS performance, and shipping pixel-perfect, production-ready applications in fast-paced Agile environments.

Acheev

Senior Software Engineer

Acheev

Aug 2024 – Present

Los Angeles, United States

  • Engineered a 3-tier TypeScript ecosystem (React Native iOS/Android, React Coach Web Dashboard, GraphQL API) backed by 70+ domain models and 150+ database migrations.
  • Developed dual-workflow coach programming features (workout builder, scheduling calendars, team/athlete assignment) supporting both individual and team operations.
  • Integrated dual payment rails (Stripe Subscriptions & Apple IAP) alongside Stripe Connect automated payout pipelines.
  • Built an automated video transcoding pipeline (BullMQ, FFmpeg, S3/HLS) featuring automatic retry logic alongside real-time status management for direct, team, and community chat channels.
TechSea

Senior Mobile Engineer

TechSea

Mar 2025 – Sep 2026

Lahore, Pakistan

D12 Solutions

Mobile Tech Lead

D12 Solutions

Feb 2023 – Feb 2025

Rahim Yar Khan, Pakistan

Teknovation

React Native Developer

Teknovation

Jul 2022 – Jan 2023

Islamabad, Pakistan

Capabilities

Skills

Cross-platform mobile development, MERN stack, and end-to-end product delivery from architecture to App Store deployment.

Mobile & Frontend

React NativeExpoTypeScriptReact.jsNext.jsReduxZustandContext APITailwind CSSReact Navigation

Backend & Integrations

Node.jsNestJSExpress.jsGraphQLREST APIsFirebaseSupabaseMongoDBSQLWebSocketsStripeIn-App PurchasesOpenAI / GenAIClarifaiPush NotificationsBluetooth / Smart Devices

Tools & DevOps

AWSVercelNetlifyGitCI/CDJestSentryXcodeAndroid StudioJiraFastlane

Other

Performance OptimizationUnit / E2E TestingApp Store & Play DeploymentAccessibilityAgile / ScrumTechnical LeadershipCode Review & Mentoring

Selected Work

Projects

Production mobile apps and web products built with React Native and a modern full-stack toolchain.

Mobile Apps

Loading live store stats and ranking by downloads and rating.

Aheev Performance

Acheev empowers athletes with cutting-edge performance tracking and personalized training insights, optimizing their journey to peak fitness.

GraphQLReact & React NativeNode JSFirebase

Barcelona Guide

Unlock Barcelona's treasures with our comprehensive travel guide app. Explore attractions, historic sights, and travel details seamlessly in one place.

React & React NativeJavaScriptPHPFirebase

ClearPast: AI Photo Enhancer

Turn blurry, low-quality photos into stunning high-resolution images instantly using powerful AI enhancement.

React & React NativeTypeScriptAI / ML

CRBO Inc.

A taxi App where people can rent thier cars with drivers for short and Long Trips. If Sign Up as a User, people can use this Uber like service

React & React NativeFirebaseJavaScriptStripe

Dialed Resistance

An IoT-powered fitness app that connects with a resistance monitor to bring smart resistance tracking to standard spin bikes.

AndroidJavaOneSignalIn-App Purchases

FMHero

Mobile HVAC documentation tool built by techs — cut paperwork time in half, stay compliant, and keep service records for life.

React & React NativeTypeScriptFirebase

Glowvia: AI Glow Up

AI glow-up coach with a personalized Glow Score, 30-day plans, and tools to optimize skin, face, hair, and style.

React & React NativeTypeScriptAI / ML

Goal'in

100% free sports predictions app with challenges, rankings, and rewards for football fans.

React & React NativeJavaScriptFirebase

ICR - IT Centre RYK

ICR provides a cutting-edge learning environment, offering hands-on experience and skills development for success in the evolving IT industry.

JavaScriptLaravelReact & React NativeOneSignal

Kohinoor Bazar

A digital presence for Kohinoor Bazar, an international grocery store in Budapest offering authentic South Asian, Middle Eastern, and global food products.

React & React NativeTypeScriptFirebaseNode JS

Luxurian KW

Your Gateway to Luxury Bags and Accessories Step into a world of opulence with LUXURIAN, the premier app designed exclusively for those who appreciate luxury.

React & React NativeCodeigniterOneSignal

Mangia Rewards | Dining Offers

Introducing Mangia Rewards: Explore local restaurants and get a free drink, appetizer, or dessert with every entree purchase, 7 days a week.

React & React NativeFirebaseJavaScriptStripe

Social Proof

Testimonials

What clients say about working together.

michaelfisch313

Germany
I am extremely satisfied with the work delivered by Hamza. The app was developed and delivered exactly as per the agreed timeline, and all requested changes were implemented seamlessly. Overall, outstanding work! I look forward to working with them on future projects.

kristopherschae

United States
Hamza one again delivered an excellent product in a close turn around time. I appreciate working with him immensely.

rizzy99

United Kingdom
Hamza Dev did an outstanding job on our mobile app project! The work was professional, well-documented, and bug-free. His proactive communication and dedication to going above and beyond made the collaboration seamless and enjoyable. I look forward to working with him again.

kevin_dv

India
Amazing work, will definitely hire him again. Don't think hire him, you won't regret.

richard2022

Morocco
Third project with Hamza and same quality.

ajfelix1

United States
Never disappoints!

oto2022

Germany
I had a fantastic experience with this developer. Not only did he deliver my project quickly and professionally, but he went above and beyond my expectations. His communication was always clear and friendly, and he really understood what I needed. He effortlessly implemented even complex requirements and suggested creative solutions. I am more than satisfied with the result and will definitely use him again for future projects. An absolute recommendation!

gillinger

Sweden
Hamza Dev truly impressed me with his EXCEEDING expectations in mobile app development. His attention to detail and professionalism were outstanding, making our collaboration smooth and efficient. Working with him was a pleasure, thanks to his prompt delivery and excellent communication skills.

lorie_nelson

United States
I don't know why this developer has 4.9 stars. He should have 5.0 1000%. Fluid in English, fixes bugs instantly, goes above and beyond, understands coding issues very clearly, is very precise when issuing a fix, first developer that impressed me on Fiverr and I've worked with several. He's my new software developer and I already trust his expertise in anything I could throw at him. Will order from him again and again.

Foundation

Education

Academic background and continuous learning.

KFUEIT
Khwaja Fareed University of Engineering and Information Technology

Bachelor of Science in Software Engineering

  • Completed rigorous coursework covering Data Structures & Algorithms, Software Architecture, Database Systems, and Mobile Application Development.
  • Specialized in full-stack mobile development, integrating cross-platform frontends with scalable Node.js microservices and cloud backends.
  • Applied core software engineering principles to build, ship, and deploy production-ready mobile and web applications throughout my degree.

Impact

Highlights

Key metrics and achievements from real production work.

50+

Production apps

70%

Stability improvement

50%

Faster load times

6+

Years experience

60 FPS

Target performance