Senior Android & Kotlin Multiplatform Engineer

Muhammad Usman

Native Android/IOS · Kotlin Multiplatform · Production Mobile Architecture

10+ years of software-development experience specializing in Android engineering, Jetpack Compose, and cross-platform systems with Kotlin Multiplatform. Experienced in architecting scalable mobile applications, BLE device integrations, and production full-stack products.

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Sialkot, Punjab, Pakistan (Remote Worldwide)

Senior Roles & Contract Engagements

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Muhammad Usman — Senior Android & Kotlin Engineer

About & Specialization

Senior engineer building reliable mobile applications, shared architectures, and connected device workflows

I am a senior software engineer with over 10 years of software development experience, including more than 6 years specializing in Android and modern Kotlin development. My focus centers on architecting clean, maintainable, and high-performance applications with Jetpack Compose, Kotlin Coroutines, and modern dependency injection.

Beyond native Android, I actively engineer cross-platform mobile solutions using Kotlin Multiplatform (KMP) and Compose Multiplatform, delivering production-ready experiences across Android and iOS with shared data and domain logic.

My engineering background spans diverse domains: consumer AI products, donor kiosks and payment workflows, BLE hardware firmware configuration, public transportation, and open-source platform utilities. Whether diagnosing complex concurrency bugs, refactoring legacy codebases to Clean Architecture, or integrating specialized hardware peripherals, I emphasize production reliability, clarity, and rigorous engineering practices.

10+

Years Total Engineering

Years Android & Kotlin

Years Kotlin Multiplatform

15+

Production & Published Apps

Android & Jetpack Compose

6+ years deep Android specialization with Kotlin, Jetpack Compose, Coroutines, Flow, Hilt, and Android platform SDKs.

Kotlin Multiplatform (KMP)

Cross-platform mobile architecture sharing business logic and UI with Compose Multiplatform across Android and iOS.

Connected Devices & BLE

Hands-on experience with Bluetooth Low Energy (BLE), beacon/wearable firmware updates, thermal printers, and USB peripherals.

Production Architecture

Clean Architecture, MVI/MVVM, dependency injection, rigorous code reviews, automated testing, and legacy codebase refactoring.

Production Deliveries & Engineering Evidence

Featured Work

Published products, cross-platform mobile systems, and open-source contributions

AI & Cross-Platform

Android · iOS

Tamseel AI: Story Generator

AI-Powered Cross-Platform Illustrated Stories

Problem & Context: Children's screen time is often passive. Tamseel AI turns screen time into learning and growth by generating personalized, illustrated adventures tailored to reading levels with synchronized narration.

Engineering Contribution

Architected the cross-platform mobile app using Kotlin Multiplatform (KMP), integrating OpenAI/generative story APIs, Firebase backend services, and RevenueCat subscription monetization across Android and iOS.

Kotlin Multiplatform

Ktor

Firebase

RevenueCat

Koin

Coil

DataStore

Visit Project Play Store App Store

Compose Multiplatform

Android · iOS

Mentiva

Daily Reflection & Mental Wellness Application

Problem & Context: Most mental wellness apps enforce intrusive paywalls or mandatory accounts. Mentiva offers daily reflections, mood tracking, and mood-matched discovery with no forced sign-up or personal data harvesting.

Engineering Contribution

Engineered cross-platform mobile UI and shared business logic using Kotlin Multiplatform and Compose Multiplatform, multi-network ad mediation (Google Ads, Liftoff, Unity), and local persistence.

Compose Multiplatform

Kotlin Multiplatform

Liftoff Mediation

Google Ads

Unity Ads

Visit Project Play Store App Store

Open-Source Android

Android

Amadz Dialer

Open-Source Android Calling App & Telephony System

Problem & Context: Stock telephony dialers are often proprietary, bloated, or ad-laden. Amadz provides an open, private, lightweight Android calling experience with modern Material You interface.

Engineering Contribution

Sole creator and maintainer. Implemented with Jetpack Compose, Navigation 3, Hilt, Paging 3, and native Android telephony framework APIs (call handling, grouped history, T9 contact search, and call blocking).

Kotlin

Jetpack Compose

Android Telephony APIs

Navigation 3

Hilt

Paging 3

Visit Project

Source

Connected Devices / BLE

Android · iOS

Lopos Alert & Configurator

Industrial BLE Hardware Configuration & Firmware Updates

Problem & Context: Lopos hardware beacons and wearables require reliable field configuration, sensor diagnostics, and over-the-air firmware upgrades in high-interference industrial environments.

Engineering Contribution

Contract engineer maintaining and improving Android and iOS applications: Bluetooth Low Energy scanning, Auth0 enterprise authentication, telemetry pipelines, and Nordic DFU firmware updates.

Jetpack Compose

BLE / Bluetooth

Nordic DFU

Hilt

Auth0

SwiftUI

Combine

Visit Project Play Store App Store

Fintech & Kiosks

Android · Web

GiveTree Ecosystem

Kiosk Donation Mobile App & Admin Web Dashboard

Problem & Context: Charitable organizations require secure, tamper-resistant kiosks for in-person giving alongside centralized administrative dashboards for campaign oversight and compliance.

Engineering Contribution

Collaborated on Android kiosk client using Clean Architecture, payment flows, and ESC/POS thermal printer receipts; contributed to the Next.js/Prisma administrative dashboard and AWS SES transactional emails.

Jetpack Compose

Clean Architecture

ESC/POS Printing

Next.js

Prisma ORM

AWS SES

Visit Project Play Store

Habit Change & Subscriptions

Android

Seed

Gamified Habit-Change & Guided Recovery App

Problem & Context: Behavioral addiction recovery demands high user engagement, frictionless onboarding, and habit reinforcement tools to prevent relapse.

Engineering Contribution

Engineered mobile experience using MVVM architecture, interactive 3D orb progress visualizations with Spline, audio playback, Firebase, Mixpanel analytics, and multi-tier paywalls via RevenueCat & Superwall.

RevenueCat

Superwall

Spline 3D

MVVM

Hilt

Firebase

Mixpanel

Visit Project Play Store

Local Networking & Sockets

Android

PolySpeaker

Direct P2P Group Audio Broadcast System

Problem & Context: Tour groups often struggle with expensive, bulky radio equipment or poor cellular reception in historical and underground locations.

Engineering Contribution

Developed an off-grid audio broadcast solution using Wi-Fi Direct and Netty TCP socket client/server architecture, QR code pairing with Google ML Kit, and MVVM design.

Wi-Fi Direct

TCP Sockets

Netty Client/Server

Google ML Kit

Hilt

Visit Project Play Store

Client Reviews

Feedback from founders, executives, and teams who relied on my product engineering and mobile app delivery.

Review

“I had the pleasure of working with Muhammad Usman on the development of our Android and iOS app, and I cannot recommend him highly enough. His ability to deliver high-quality work on time was impressive, and his smooth communication throughout the project made the entire process seamless. Muhammad isn't afraid to take initiative and proactively address challenges, which made a real difference in keeping the project on track. His expertise in mobile app development and commitment to delivering excellent results make him a valuable asset.”

Jen Rossey

Founder, CTO

Lopos

Review

“I've had the pleasure of working with Muhammad, an outstanding Senior Android Developer. His discipline and commitment are second to none, consistently delivering high-quality work on time. Muhammad's technical skills, problem-solving ability, and proactive approach make him a reliable and valuable team member. I highly recommend him for any project requiring expertise in Android development.”

Abou Nkya

Founder, CEO

HashTech (T) ltd

Review

“Muhammad is an excellent app developer, his commitment and communication skills are excellent. He is polite, patient and goes beyond his way to consult, advise and implement the best practices. I would recommend anyone to hire Muhammad. My job was completed within the shortest time possible. Amazing work ethics and job well done.”

Andrew Beatty

PResident

Singular Inversions.

Review

“Muhammad did a great job with my Firebase functions. I will definitely work with him gain.”

Bekzod Rakhmatov

CEO

ZBEKZ GROUP.

Review

“Muhammad is at this point an expert in android application development. He is spot on I can not insist on how talented he is. No task is beyond his capabilities. Hire this guy and you will thank me later.”

Krish Talluri

Principal & Chief Architect

Talsk Research Inc.

Review

“Great experience. Muhammad is a true Android pro, communication was great, would absolutely hire again”

Brian Einhaus

Founder

Watchmode.

Review

“Muhammad demonstrated an exceptional capability to grasp the needs of our project and achieve an incredibly fast turnaround - this was a fairly complex job, and he had it done in a matter of a few hours from when we first spoke. I will definitely be working with him again on more projects. Highly recommended!”

Meir Itzinger

Asset Manager

UP REALTY LLC.

Review

“I am very happy with the work of Muhammad. He was proactive and the quality and speed was top notch.”

Jen Rossey

CEO

Lopos Inc

Review

“Muhammad did a great job meeting my project requirements and was very easy to work with. I will definitely seek out Muhammad for future projects.”

Stephen

Support Manager

Adhoc Support

Review

“Muhammad is clearly an expert in his field. He communicates efficiently and solves problems fast. After working with Muhammad I would definitely like to hire him again.”

Kaj Caspersen

Founder, CEO

AI Stories

Technical Competencies

Structured engineering skills categorized by specialization depth and production application

Primary Specialization

Android Engineering

Modern Android application engineering, reactive asynchronous architectures, and performance tuning.

Core Expertise

Kotlin

Jetpack Compose

Android SDK

Coroutines & Flow

Clean Architecture

MVVM / MVI

Hilt & Dagger

Room & DataStore

Supporting & Integrated

Java

Android Telephony APIs

Navigation Compose

WorkManager

Paging 3

Macrobenchmark

JUnit & Espresso

Multiplatform Architecture

Cross-Platform & Mobile

Shared mobile architecture and UI frameworks across Android and iOS platforms.

Core Expertise

Kotlin Multiplatform (KMP)

Compose Multiplatform

Shared Business Logic

Ktor HTTP Client

Koin Dependency Injection

Supporting & Integrated

SwiftUI

Combine

Multiplatform Persistence

RevenueCat & StoreKit

AdMob & Liftoff Mediation

Differentiating Capability

Connected Devices & Hardware

Interfacing Android with physical hardware peripherals, sensors, and low-power wireless protocols.

Core Expertise

Bluetooth Low Energy (BLE)

BLE Scanning & GATT Services

Nordic DFU (OTA Firmware)

Thermal Printers (ESC/POS, Sunmi, Zing)

Supporting & Integrated

Wi-Fi Direct Peer-to-Peer

Netty TCP Sockets

NFC Tag Reading

USB Host Devices

Iris & Fingerprint Scanners

Applied AI Integration

AI-Enabled Applications

Integrating verified AI APIs, computer vision, and machine learning models into production mobile apps.

Core Expertise

AI API Integration (OpenAI, Anthropic)

Google ML Kit (Vision, Barcode)

Streaming AI Content Delivery

Supporting & Integrated

Context Prompt Structuring

Audio Narration Integration

Edge Vision & Scanning

Full-Stack Supporting

Web & Backend Systems

Developing administrative portals, API services, and modern responsive web interfaces.

Core Expertise

Next.js

React

TypeScript

Tailwind CSS

RESTful API Integration

Supporting & Integrated

Ktor (Server-side Kotlin)

Prisma ORM

JOOQ & SQL

Zod Validation

PostgreSQL & MySQL

Infrastructure & CI/CD

Cloud & Developer Tooling

Backend-as-a-service, cloud storage, crash monitoring, and automated deployment pipelines.

Core Expertise

Firebase (Auth, Firestore, Storage)

Cloud Functions

Firebase Crashlytics & Analytics

Git & GitHub Actions

Supporting & Integrated

AWS (S3, CloudFront, SES)

GitLab CI

Auth0

Google Play Console & TestFlight

Professional Experience

Detailed chronological record of professional roles, verified responsibilities, and engineering impact

Android Engineer / Software Engineer

Lopos Inc.·Remote Contract · Part-time·Belgium (Remote)

Dec 2023 – Present

Part-time contract role focused on maintenance, bug fixing, and targeted feature improvements for industrial BLE hardware applications (Lopos Alert on Android and Lopos Configurator on iOS).

Key Responsibilities & Work

Maintain BLE scanning, GATT telemetry communication, and Nordic DFU over-the-air firmware update pipelines for industrial beacons and wearables.
Diagnose and resolve production defects; improve error handling and application stability.
Maintain Auth0 enterprise authentication and Retrofit/OkHttp networking across Android and iOS.
Collaborate on both Android (Jetpack Compose, MVVM, Hilt) and iOS (SwiftUI, Combine) device workflows.

Kotlin

Jetpack Compose

BLE / Bluetooth

Nordic DFU

Hilt

Auth0

Retrofit

SwiftUI

Combine

Full-Stack Engineer

Armour Payments·Remote Contract·Canada (Remote)

Nov 2023 – Present

Contribute to the GiveTree donation kiosk Android client and associated administrative web portal ecosystem.

Key Responsibilities & Work

Develop donation collection workflows in Jetpack Compose following Clean Architecture principles.
Integrate ESC/POS thermal receipt printers, local persistence (DataStore), and payment integrations.
Contribute to the administrative web dashboard built with Next.js, TypeScript, and Prisma ORM.
Integrate AWS SES transactional email services and write automated tests with JUnit and Espresso.

Jetpack Compose

Clean Architecture

DataStore

ESC/POS Printers

Next.js

TypeScript

Prisma ORM

AWS SES

JUnit

Android Developer

Borvista LLC·Remote·Texas, United States (Remote)

May 2022 – Apr 2023

Led modernization and architecture refactoring initiatives for enterprise mobile applications in an Agile team environment.

Key Responsibilities & Work

Migrated monolithic architecture toward Clean Architecture (Data, Domain, Presentation) with MVVM.
Refactored legacy RxJava reactive pipelines to Kotlin Coroutines & Flow, and transitioned layouts toward Jetpack Compose.
Implemented strict data privacy safeguards complying with CCPA and GDPR regulations.
Integrated BLE hardware connectivity and specialized cryptographic SDKs.

Kotlin

Jetpack Compose

Clean Architecture

Coroutines & Flow

MVVM

BLE

CCPA/GDPR Compliance

Senior Android Developer

Fleeksoft·Full-time·Sialkot, Pakistan

Oct 2018 – May 2022

Delivered production Android solutions across transportation, education, healthcare, and enterprise mobility.

Key Responsibilities & Work

Architected and delivered scalable Kotlin applications using Clean Architecture, MVVM, and MVP patterns.
Integrated specialized hardware peripherals: iris scanners, fingerprint readers, USB Host devices, and thermal/POS printers.
Diagnosed low-level concurrency bottlenecks, memory leaks, and background process crashes.
Mentored junior engineers and conducted peer code reviews and automated testing with JUnit and Espresso.

Kotlin

Java

Android SDK

Hilt / Dagger

Clean Architecture

USB Host

Biometric Scanners

Thermal Printers

Espresso

Android Developer / Junior Web Developer / Mentor

SUHTECH·Full-time·Sialkot, Pakistan

Mar 2016 – Oct 2018

Engineered native Android applications, IoT hardware prototypes, and web service integrations.

Key Responsibilities & Work

Built and maintained Android applications for courier tracking, student attendance, and warehouse management.
Engineered smart-home and IoT prototypes communicating with ESP8266 microcontrollers.
Implemented NFC tag scanning for attendance and inventory verification systems.
Applied code obfuscation and security hardening using DexGuard.

Android

Java

ESP8266 IoT

NFC

DexGuard

REST APIs

Web Technologies

Certifications & Credentials

Verified industry certifications and formal technical credentials

Meta (Coursera)

Meta Android Developer Professional Certificate

ID: Q9Z4PR7Q38HS

Comprehensive professional credential covering native Android architecture, Jetpack Compose, Kotlin, data persistence, and automated UI testing.

Verify Credential

Amazon Web Services

AWS Certified Cloud Practitioner

ID: LGSHXDK1Z1RQQMWT

Foundational AWS certification covering cloud architecture, security principles, compute/storage services, and deployment models.

Verify Credential

PIAIC

Certified Cloud Native Computing

ID: PIAIC90157

Specialized program in cloud-native technologies, containerization foundations, microservices, and modern deployment pipelines.

Verify Credential

Verified Google Developer Profile with recognized learning milestones:View Google Profile

Education

Academic foundations in computer science, software engineering, and applied information technology

Bachelor of Science in Information Technology (BS IT)

University of Gujrat, Pakistan

August 2011 – May 2015

Comprehensive coursework in Software Quality Assurance, Data Structures and Algorithms, Android and Web Development, Human-Computer Interaction, and Data Warehousing.

Graduated with 3.13 CGPA

Faculty of Science (FSc Pre-Engineering)

Govt Degree College Daska, Pakistan

August 2009 – May 2011

Foundational coursework in Advanced Mathematics, Physics, and Chemistry.

78% Score

Personal Pursuits

Interests and activities beyond day-to-day code delivery

Kotlin & Open Source

Experimenting with Kotlin Multiplatform advancements, Compose internals, and open-source tooling.

Embedded & Hardware

Tinkering with microcontrollers, BLE beacons, IoT integrations, and hardware protocols.

Technical Reading

Studying software architecture, system reliability, and modern mobile engineering literature.

Sports & Fitness

Playing competitive badminton and soccer to maintain balance, agility, and teamwork.

Outdoors & Travel

Exploring natural landscapes and hiking trails to disconnect and recharge.

Documentaries

Deep-diving into documentaries on engineering feats, history, and scientific discoveries.

Direct Communication & Availability

Let's Connect

Available for senior Android/Kotlin roles, cross-platform consulting, and select contract engagements

Direct Channels

Choose the channel most convenient for you. I respond promptly to inquiries.

Direct Email

msusman97@gmail.com

Preferred for direct recruitment & technical inquiries

Upwork Profile

Hire via Upwork

Contract engagements & escrow-backed projects

Connect on LinkedIn

Professional network and employment inquiries

GitHub Profile

github.com/msusman1

Open-source code repositories & implementations

Location & Availability

Sialkot, Punjab, Pakistan

Available for remote collaboration across worldwide timezones

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