Available for work

Muhammad Raza Master

Senior iOS & Full-Stack Engineer/

I build high-performance iOS applications and AI-driven full-stack products. 13+ years of engineering experience, Toptal verified, and based in Berlin.

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Berlin, Germany
01

About

I am a Senior iOS Specialist and Full-Stack Engineer with over a decade of experience taking products from blank canvas to App Store. Ranked in the top 3% of global engineers, I build mobile apps that stay fast and reliable at scale.

I work with a founder's mindset: ship fast, sweat the UX, keep the architecture clean. Lately that means building AI-driven products and folding AI into how I build them. Based in Berlin, I'm open to Senior, Lead, or Founding Engineer roles, remote or hybrid.

Experience
13+ years
Focus
iOS, AI & Full-stack
Based in
Berlin, Germany
02

Skills

Core iOS

  • Swift
  • SwiftUI
  • UIKit
  • Combine
  • iOS SDK
  • Xcode
  • Objective-C

Architecture

  • MVVM
  • VIPER
  • Clean Architecture
  • Dependency Injection
  • SOLID

Frameworks & Libraries

  • RxSwift
  • RealmSwift
  • Alamofire
  • Core Bluetooth
  • AVFoundation
  • XMPPFramework
  • CallKit
  • CocoaPods

AI & APIs

  • Claude API
  • Claude Code
  • OpenClaw
  • Hermes Agent
  • Cursor
  • AI Integration
  • REST
  • GraphQL
  • WebSocket
  • Socket.IO

CI/CD & DevOps

  • Fastlane
  • GitLab CI/CD
  • GitHub Actions
  • TestFlight
  • Bitrise
  • App Store Connect

Backend & Cloud

  • Node.js
  • AWS
  • Firebase
  • Supabase
  • Express.js
  • PostgreSQL
  • MongoDB

Cross-Platform

  • Next.js
  • React
  • TypeScript
  • React Native
  • Flutter
  • Kotlin
  • Python
03

Experience

  1. Jul 2021 - Present

    Senior iOS Engineer · MyPostcard.com

    Berlin, Germany

    • Lead the iOS app end to end, from requirements through App Store release and ongoing release management.
    • Hold a crash-free user rate above 99.84% through code quality work and architectural decisions.
    • Integrated Apple Pay, Stripe, and the Google Maps API to expand the app's payment and location features.
    • Built the CI/CD pipeline and wrote the coding style guidelines the team now follows.
    • Run technical interviews, code reviews, and pairing sessions to keep code quality and team standards high.
    • Shipped Claude API and AI chatbot features using AI-assisted development workflows.
    • Swift
    • SwiftUI
    • UIKit
    • Apple Pay
    • Braintree
    • Claude Code
    • TestFlight
    • Fastlane
  2. Aug 2020 - Jan 2022

    iOS Developer · ASD.ai

    Remote · via Toptal

    • Built Rootines, an iOS app that helps clinicians track daily routines for neurodiverse patients.
    • Designed complex animated UIs in SwiftUI and structured the app with MVVM and dependency injection.
    • Used Combine for reactive data flow and RealmSwift for local persistence.
    • Swift
    • SwiftUI
    • Combine
    • MVVM
    • RealmSwift
    • Binah.ai SDK
  3. Dec 2017 - Jun 2021

    Lead Software Engineer · TelloTalk, Inc.

    Karachi, Pakistan

    • Led development of Pakistan's first all-in-one messaging app from iOS to cross-platform.
    • Architected the iOS and Android apps with MVVM and clean architecture, and moved from Senior to Lead within months.
    • Built TelloCast, a P2P and group messaging SDK that third parties could drop into their own apps.
    • Set up and maintained CI/CD with Fastlane and GitLab Runner, and ran a Node.js push service on AWS.
    • Ran cross-platform code reviews, led technical hiring, and held weekly internal tech talks.
    • Swift
    • UIKit
    • Clean Architecture
    • Fastlane
    • XMPP
    • Socket.IO
    • Node.js
    • AWS
    • Kotlin
  4. May 2018 - Dec 2018

    iOS Developer · CoinBundle

    Remote · Contract

    • Built a fintech iOS app from zero to launch that let non-technical users invest in crypto.
    • Implemented custom UI and animations from Figma specs and integrated Rave for card payments.
    • Used MVVM with RealmSwift for persistence.
    • Swift
    • UIKit
    • MVVM
    • RealmSwift
    • Apple Pay
    • Alamofire
  5. Apr 2017 - Dec 2017

    Software Engineer (iOS) · VentureDive

    Karachi, Pakistan

    • Shipped features, fixes, and performance work across several iOS apps.
    • Wrote unit tests covering edge cases to keep the apps reliable.
    • Led an Objective-C to Swift migration and introduced RxSwift to the team.
    • Swift
    • Objective-C
    • RxSwift
    • MVVM
    • VIPER
    • UIKit
  6. Feb 2016 - Mar 2017

    Software Engineer (iOS) · Invision Custom Solutions

    Karachi, Pakistan

    • First iOS hire. Built and shipped five apps across social, health, video call, and image processing.
    • Integrated OpenTok for video calling and Twilio for communications.
    • Owned the full lifecycle from requirements through deployment and client communication.
    • Swift
    • Objective-C
    • Alamofire
    • OpenTok
    • Twilio
    • AWS
  7. Jun 2014 - Jan 2016

    Software Engineer · Panacloud Pvt. Ltd.

    Karachi, Pakistan

    • Built one of the first Swift apps while Swift was still in beta.
    • Led a team of 10 iOS developers and launched the company's first iOS app.
    • Delivered Swift training sessions at universities across Karachi.
    • Swift
    • Objective-C
    • Firebase
    • Node.js
    • MongoDB
    • Express.js
04

Projects

05

Education

2019 - 2021

M.S. Computer Science

Institute of Business Administration (IBA)

Karachi, Pakistan

2012 - 2016

B.S. Computer Science

University of Karachi

Karachi, Pakistan

06

Certifications

Programming for Everybody (Python)

Coursera · 2020

AI for Everyone

Coursera · 2020

Python 101 for Data Science

Cognitive Class · 2019

Blockchain Essentials

Cognitive Class · 2019

Bioinformatics I

Coursera · 2019

MongoDB for Node.js Developers

MongoDB University · 2014

07

Contact

Let's build something.

I'm open to senior and lead engineering roles, remote or hybrid. Email is the fastest way to reach me, or find me on the platforms below.

mrazam110@gmail.com

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