Osama AzmatSenior iOS Engineer

About

Osama Azmat Khan

I am a Senior iOS Engineer with over 7 years of experience architecting high-performance mobile ecosystems across FinTech, IoT, and Mobility. Great mobile apps are not just functional — they are elegantly designed, inclusive, and built to scale.

At PayPay, I lead architectural transitions that define experience for millions: migrating legacy systems to SwiftUI and Combine, modularizing features into Swift Packages, and driving company-wide Accessibility initiatives. I thrive where deep technical problem-solving meets product strategy — improving GMV, reducing onboarding friction with VisionKit, and building AI-driven tooling that accelerates engineering teams.

What I bring

languages

SwiftObjective-CKotlin (tooling)Node.jsC# / .NET Core

frameworks

SwiftUIUIKitCombineRxSwiftCore DataCore BluetoothVisionKitCore Location

architecture

MVVM-CVIPERClean ArchitectureMVVMProtocol-Oriented DesignSPM Modularization

product

Apple PayBiometric AuthDeep LinkingA/B TestingAccessibility (VoiceOver)Performance Optimization

quality

TDDUnit TestingCI/CD StabilityMemory ProfilingCrash Reduction

tools

XcodeGitFirebaseMixpanelREST APIs

Experience

See products →

Dec 2022 – Present

Current

Senior Software Engineer (iOS)

PayPay Corporation · Tokyo, Japan

Leading architectural modernization and high-impact product features for Japan’s largest mobile payment ecosystem.

  • Led Notification Center modularization into a dedicated Swift Package using SwiftUI and @MainActor ViewModels, improving build times and maintainability.
  • Drove organization-wide RxSwift → Combine migration, aligning the codebase with modern Apple standards.
  • Implemented Apple Pay native binding and VisionKit credit card recognition to expand payment options and streamline onboarding.
  • Improved GMV with automatic user-limit handling that reduced payment failures and boosted transaction success.
  • Spearheaded company-wide VoiceOver accessibility guidelines adopted by both iOS and Android teams.

May 2021 – Dec 2022

Executive Manager, Senior Software Engineer (iOS)

Telenor Microfinance Bank · Pakistan

Led the Vertical Integrations & Acquisitions App Squad, shipping platform-scale features for growth and reliability.

  • Built MiniApp Emulator for streamlined third-party service integration.
  • Shipped Digital Onboarding, Customer Support, and Email Security modules.
  • Implemented Face ID / Touch ID biometric authentication for frictionless secure access.

May 2020 – Apr 2021

iOS Developer

Cielo WiGle Inc. · Pakistan

Redeveloped the Cielo Home iOS app for a scalable IoT smart-home ecosystem.

  • Rebuilt the full app with MVVM-C, emphasizing modularity and reusability.
  • Added full BLE support for a new smart-home device.
  • Fixed 20+ UI/UX issues and critical memory leaks via profiling.

May 2019 – Apr 2020

Software Engineer

EzBike (Formerly Roamer) · Pakistan

Owned the complete iOS application for a mobility / fleet product in a fast-paced growth environment.

  • Delivered end-to-end features from requirements through production.
  • Built real-time socket-based driver communication with Node.js.
  • Integrated Mixpanel analytics and Facebook Ads deep linking for acquisition.

Oct 2017 – Feb 2019

Associate Software Engineer

Tarkeeb Technologies · Pakistan

Full-stack contributor across backend, admin, and iOS for production systems.

  • Designed schemas and REST APIs with C# / .NET Core.
  • Built Angular admin panels and contributed to the Swift iOS client.

Hire me

Looking for a Senior iOS or Mobile Engineer?

I help teams modernize large iOS codebases, ship FinTech-grade payment flows, and raise accessibility and performance bars. Based in Tokyo — open to roles worldwide, remote or onsite.

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