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Sufyan Sattar

@sufyansattar

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Mobile engineer specializing in Kotlin, Compose, modular architectures, and secure apps.

United States

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What I'm looking for

I seek senior mobile engineering roles focused on Kotlin/Compose, modular architectures, secure payments, and mentoring within collaborative, product-driven teams.

I’m a mobile engineer who enjoys building reliable, scalable Android apps used by real people. My work spans healthcare, fintech, and consumer products, where performance, security, and quality are essential. I primarily work with Kotlin, Jetpack Compose, and modular architectures, with a strong focus on clean code and long-term maintainability.

Alongside mobile development, I work closely with backend systems and cloud services, collaborating on APIs, authentication, and data flows to ensure smooth, production-ready experiences. I’ve contributed to apps used by millions of users and have taken on leadership responsibilities, including architectural decisions, mentoring engineers, and improving app performance and stability.

I’m motivated by building solid, secure products and working with teams that value ownership, communication, and doing things the right way.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Consultant

Current

Systems Limited

Feb 2023 - Present (2 years 11 months)

Led mobile engineering for a multi-module healthcare platform (20+ modules, 100K+ active users), improving maintainability by 45% and team velocity by 35% while delivering telehealth, genomics, and secure payment features supporting 1M+ monthly transactions.

Kotlin Jetpack Compose Azure Communication Services CI CD (Bitrise Codemagic)LibGDX Health SDK Integrations

Senior Software Engineer

Tkxel

Apr 2022 - Jan 2023 (9 months)

Built enterprise mobile apps using MVVM, Room and Retrofit, improving data-load performance by 30% and reducing crash rate to <0.5% through monitoring and CI/CD automation.

Kotlin MVVM ROOM Retrofit Jenkins GitHub Actions

Senior Android Developer

the Entertainer LLC

Jan 2022 - Mar 2022 (2 months)

Delivered features for a multi-module consumer app (1M+ users), improved engagement by 20% through flow optimizations and Maps & Places integrations, and deployed an Android SDK to a Maven repository.

Android SDK Performance Optimization CI CD

Android Developer

AKSA SDS Pvt Ltd

Dec 2020 - Jan 2022 (1 year 1 month)

Rebuilt and redesigned a mobile banking application (5M+ downloads), implementing advanced mobile security (DexGuard, AES/RSA, SSL pinning) and national biometric verification for compliant authentication.

Mobile Security Biometrics Multi Provider Auth

Android Developer

the IT Zon

Jul 2019 - Nov 2020 (1 year 4 months)

Developed 15+ consumer apps with analytics, ads, and notifications; shipped 10+ apps achieving millions of downloads across global Play Store markets and delivered high-performance multimedia and utility features.

Android Development Analytics Ad Monetization Notifications

Android Developer

Metologix Pvt Ltd

Jul 2018 - Jun 2019 (11 months)

Built e-commerce and POS mobile applications, modernized legacy codebases and improved reliability while developing a location-based social app to connect users.

Android Commerce Applications POS Integration Reliability Engineering

Education

Degrees, certifications, and relevant coursework

Meta (Facebook) - Android Developer Professional Certificate

Professional Certificate, Android Development

2023 - 2023

Completed the Meta Android Developer Professional Certificate covering Android fundamentals and app development best practices.

Udemy - Master in Dart Language (Flutter)

Certificate, Dart / Flutter

2021 - 2022

Completed a Udemy course on Dart and Flutter focusing on building cross-platform mobile applications with Flutter.

University of Sargodha

Bachelor of Science, Software Engineering

Grade: 3.8

Activities and societies: Grade: 3.4/4.0Grade: 3.4/4.0 Activities and societies: - Got 2nd position in the batch (Silver Medal) - Active participation in university events - Event Management - Coding competition (1* Winner + 1*Runner-Up)

Completed a Bachelor of Science in Software Engineering focusing on software development principles and engineering practices.