Lead Android Developer - Kotlin, MVVM, Clean Architecture

Ali Muhammed

Lead Android Developer

Phone: 469-***-****; Email: ***********@*****.***

Professional Summary

●12+ years' experience in designing and developing Android mobile applications that are enterprise and customer-facing.

●Published apps to Play Store: 6

●Skilled programming and Android development using various Android SDKs and Java and Kotlin in Android Studio and Eclipse.

●Work well in an Agile Scrum environment and provide constructive contributions to Sprint Planning, Grooming, and Backlog meetings.

●Design and implement Android application architectures with MVC, MVP, and MVVM.

●Experience designing new apps and implementing architectural patterns and revision and transitioning existing apps in architectural and design pattern changes.

●Collaborate well with product teams, design teams, and quality testing teams.

● Skilled Kotlin and Java programmer, and RxKotlin and RxJava frameworks.

●Work with back-end teams to ensure effective connections and responsiveness in RESTful web service calls.

●Work with mobile app database frameworks for onboard storage and caching such as Firebase real-time database, MongoDB, and Realm.

●Experience with SQLite, Room DB, and CoreData for Data Persistence and User Preferences.

●Work with Git, GitHub, GitLab, SVN, SourceTree, BitBucket, Gradle in managing code base.

●Use of Jenkins continuous integration server and GitLab for web-based testing.

●Experience with IPC (Inter Process Communication) using Bound Service with AIDL and IBinder objects.

●Experience working with JNI to integrate native C++ code into the Android app.

●Experience in working with Video, Static content, and advertising.

●Expert troubleshooters and debuggers are skilled at profiling Android applications.

●Experience with RESTful web services using JSON and GSON.

●Integration with various APIs (Facebook, Twitter, etc.).

●Well-versed in the most modern Android third-party libraries such as Volley, Retrofit, Picasso, YouTube, Location API, Maps View, Google View, Google Maps, PayPal, Stripe, Android pay, QR Droid, Butterknife, Dagger, Google Wallet payments, Android Annotations.

●Work in Agile environments with strong Scrum and pair programming fundamentals.

●Experience with consuming third-party APIs in Android development projects.

●Experience with continuous integration tools like Jenkins or Travis CI and automated testing frameworks such as Espresso and Mockito.

●Experience with embedded local storage solutions such as SQLite.

● Passionate about best UI/UX best practices implementing fragments, diverse layouts, animations, Material Design, Compound Views, and Custom Views.

●Capable of understanding business objectives and being able to translate business logic into technical design.

●Good experience with Push Notifications, Google Maps, Navigation, and GPS.

●Understanding of mobile encryption algorithms, analytics, and marketing channel integrations.

Education

●Bachelor of Science – University of Lynchburg, Lynchburg, VA

Technical Skills

Architecture and Design Patterns:

MVC, MVP, MVVM, VIPER, Singleton, Dependency Injection, Builder, Factory, Façade, Observer, AIDL

Frameworks:

Android SDK, Fabric, Firebase, Reactive-X (RxAndroid, RxJava), Android JetPack (Room, LiveView, LiveData, Download Manager), Kotlin Coroutines, Kotlin Flow

IDE:

Android Studio, Eclipse, IntelliJ

Testing:

TDD, Unit Testing (Junit), Automated Testing, JIRA, Jenkins, Written Test Cases, Android Testing (Robotium), Espresso, Robolectric, Mockito

Project Management:

Agile/SCRUM, Sprints, Daily Scrums, Sprint Retrospective, Sprint Planning, Backlog, Kanban, JIRA, Slack, Atlassian Stack, BitBucket, Git, GitHub, SVN, Tortoise

Programming Languages:

Java, C#, Kotlin, C++, Visual Basic

Libraries:

KSoap, Java Swing, GWT, Retrolambda, NineOldAnroids, RXJava, RxKotlin, Moshi, Gson

Debugging/Issue Tracking:

JIRA, DDMS tool, ADB, LeakCanary, Firebase Crash Reporting, Fabric Crashlytics, Mockito, Espresso

Database & Data Analysis:

SQLite, Firebase Realtime Database, Room Database, Mongo, FireStore

Web Services:

RESTful APIs, REST, SOAP, JSON, GSON, XML, AJAX

Multimedia:

Picasso, Glide, Fresco

Miscellaneous Technology:

Dagger, Urban AirShip, Volley, Push Notifications, Dependency Injection, GCM (Google Cloud Messaging, Retrofit, Metrowerks PowerPlant, Parse, Remote URLs, AsyncTask, Recycler View, Nougat, WorkManager, Services, Foreground Services, BroadcastReceiver, Fragments, ViewPager, NFC (Near field communication) technology

Professional Experience

Intrusion, Plano, TX Jan 2026 – Present

Lead Android Developer

Project Summary: Contributed to the development of Intrusion Shield Endpoint, a security-focused Android application with integrated VPN capabilities designed to protect devices from malicious domains and unsafe network activity. Led Android feature development using Kotlin and Jetpack Compose, while implementing secure VPN/DNS routing through VpnService and DNS-over-HTTPS. Integrated Zero Trust Network Access (ZTNA) using OpenZiti to enable secure access to private services, and supported MDM and reseller-based deployments with feature-driven user experiences. Focused on performance optimization, battery efficiency, and scalable architecture, while actively troubleshooting complex issues across networking, native SDKs, and backend integrations to ensure stable releases and production readiness.

Responsibilities:

Developed robust Android features using Kotlin, Jetpack Compose, Coroutines, Flow, Room, WorkManager, and other Jetpack components.

Engineered VPN-based traffic routing leveraging Android VpnService, TUN interface handling, packet parsing, DNS routing, and network security enforcement.

Integrated OpenZiti-based ZTNA capabilities to enable secure, seamless access to private services from mobile devices.

Implemented and troubleshot Ziti identity enrollment, service discovery, tunnel lifecycle management, and connection monitoring.

Designed and enhanced DNS-over-HTTPS (DoH) functionality using OkHttp, HTTP/2, mTLS, internal certificate authorities, and EDNS-based authentication.

Optimized DNS caching mechanisms to minimize redundant lookups, improving both performance and battery consumption.

Built and refined Jetpack Compose-based UI modules across Protect, Settings, Profile, legal/support sections, and reseller-specific flows.

Implemented dynamic feature flag systems supporting B2C, Business, Reseller, and MDM-driven application experiences.

Developed reseller-centric features including activation workflows, support visibility, sign-out controls, and local permit configurations.

Designed local permit capabilities allowing users to override blocked domains directly within the application.

Managed structured data using Room database (DNS logs, traffic logs, IP logs, permits, blocks, and polling data).

Improved background processing workflows using WorkManager for log uploads, polling, and backend synchronization.

Resolved complex issues related to certificates, API keys, provisioning, and MDM/reseller onboarding flows.

Implemented Android MDM support using managed configurations and custom debug broadcast receivers for QA validation.

Built debugging and QA utilities using adb, logcat, Python scripts, and custom Android debug tools.

Conducted network-level validation for ZTNA services using device-side diagnostics and adb-based testing.

Analyzed and resolved battery drain issues through batterystats, packet inspection, and DNS behavior optimization.

Supported native SDK integration and builds using CMake, Ninja, Android NDK, and vcpkg across multiple ABIs.

Upgraded and maintained OpenZiti tunnel SDK compatibility across arm64-v8a, armeabi-v7a, x86, and x86_64 architectures.

Troubleshot JNI, native library loading, SDK authentication, and Android memory/page-size compatibility issues.

Collaborated cross-functionally with backend, QA, product, and external teams to ensure smooth releases and issue resolution.

Utilized tools such as Jira, Git, Android Studio, adb, logcat, Teams, and Outlook for development lifecycle management.

Actively contributed to feature delivery, bug resolution, testing cycles, release preparation, and production support.

Toyota US, Plano, TX Aug 2024 – Dec 2025

Lead Android Developer

Link: https://apps.apple.com/us/app/subaru-solterra-connect/id1612881539

Summary: Led the development of Toyota’s next-generation OneApp, driving end-to-end implementation of the Privacy Portal and Vehicle Connectivity modules. Owned the complete feature lifecycle—from Kotlin/Jetpack Compose UI through data and repository layers to backend API contract design—while collaborating closely with design, QA, and platform teams. Partnered with backend engineers to deliver a backend-driven UI architecture, enabling updates without requiring a full app release.

Responsibilities:

Directed complete release management, including development builds, EQ testing, and MMQ testing, followed by App Store submission and certification, ensuring stable rollouts through phased production deployments.

Updated the mobile app UI to enable users to send Points of Interest (POI) directly from the app to their vehicle’s head unit, strengthening app-to-vehicle integration.

Delivered over 100 bug fixes, UI enhancements, and end-to-end feature improvements, driving stability, usability, and adherence to Toyota’s quality standards.

Partnered with backend engineers to co-define API contracts, validate with Postman/Charles traces, triage defects, and align on pagination, status codes, and versioning for reliable client-server communication.

Implemented detailed analytics instrumentation across privacy and connectivity modules, capturing user interaction events to support funnel insights, adoption tracking, and rollout readiness.

Worked within an Agile/Scrum environment, leveraging Jira for sprint planning, performing code reviews, maintaining CI/CD pipelines, and ensuring staged testing (Dev EQ MMQ) delivered high-quality releases.

Implemented UI screens and reusable composable using Jetpack Compose, replacing legacy XML where appropriate.

Improved consent and connectivity UX, enhanced DI clarity with Hilt, reduced duplicate network calls in key flows, and contributed significantly to the release readiness of Toyota’s next-generation OneApp.

Outside Source, Indiana Apr 2024 – Aug 2024

Senior Android Developer

Currently no App

Summary: Developed cross-platform mobile solutions using Kotlin Multiplatform (KMP), enabling shared business logic across Android and iOS for Bluetooth, location, and network services. Implemented platform-specific integrations, reactive state management, and robust permission handling to deliver a consistent user experience.

Responsibilities:

Utilized Kotlin Multiplatform to write shared business logic for Bluetooth, location, and network functionalities.

Leveraged platform-specific APIs to handle these capabilities effectively.

Implemented a service to check if Bluetooth is enabled and to request Bluetooth permissions.

Managed the different authorization statuses and permissions for both platforms.

Developed functionality to check location services status and request location permissions.

Handled location updates and permissions using platform-specific location managers.

Implemented checks for network connectivity status and managed network-related permissions.

Utilized platform-specific network APIs to handle connectivity changes and states.

Used Kotlin Flow for reactive state management of Bluetooth, location, and network statuses.

Integrated Kotlin coroutines to handle asynchronous operations seamlessly across platforms.

Utilized BluetoothManager, LocationManager, and ConnectivityManager to manage Bluetooth, location, and network functionalities.

Used CBCentralManager, CLLocationManager, and network reachability APIs to handle these capabilities.

Ensured robust error handling and state management, providing clear outcomes using custom Outcome classes for success and error states.

Maintained the current state of Bluetooth, location, and network capabilities using MutableStateFlow and state observers.

Handled state updates and emissions in a thread-safe manner appropriate to each platform.

Implemented logic to open the appropriate settings page for Bluetooth, location, and network if permissions are denied, using platform-specific intents and URLs.

Created a ViewModel to manage the device capabilities state, providing a unified interface for the UI layer to interact with.

Ensured that the ViewModel handled lifecycle events and state preservation efficiently.

Utilized lazy initialization patterns to efficiently manage resources, particularly for platform-specific managers like CBCentralManager on iOS.

Ensured thorough testing and debugging across both platforms to handle different states and edge cases for Bluetooth, location, and network services.

Demonstrated expertise in Kotlin Multiplatform development, including interop with platform-specific APIs.

Applied best practices for asynchronous programming, state management, and resource management in a cross-platform environment.

Whirlpool, St. Joseph, Michigan Mar 2023 – Mar 2024

Senior Android Developer

Summary: Enhanced smart appliance applications by optimizing complex data structures and implementing connected device features such as meat probe monitoring, auto diagnostics, and appliance controls. Collaborated with SDK, product, and design teams while mentoring developers and promoting MVVM best practices.

Responsibilities:

Led the optimization of Android applications by efficiently managing hierarchical data structures, particularly multi-dimensional trees sourced from JSON files, significantly enhancing overall performance

Collaborated seamlessly with cross-functional teams, notably the Android SDK and design teams, to design and implement robust solutions

Actively participated in code reviews, offering valuable insights on data structures and MVVM architecture

Provided mentorship of junior developers to ensure adherence to architectural guidelines and coding standards

Implemented comprehensive unit testing strategies, including on the actual oven device, to guarantee the reliability and quality of the user interface and overall functionality

Played a pivotal role in achieving a significant milestone drop, demonstrating the successful integration of features such as the meat probe, cavity light, door interaction, and auto diagnostics

Wayfair, Boston, MA Mar 2022 – Feb 2023

Senior Android Developer

https://play.google.com/store/apps/details?id=com.wayfair.wayfair&hl=en_CA&gl=US

Summary: Developed and enhanced Wayfair's Android e-commerce application using Kotlin, GraphQL, Coroutines, and VIPER architecture. Led the development of the My Orders feature from scratch, collaborating with product, business, and UX teams to deliver a seamless user experience. Improved application performance through optimized RecyclerView implementations, custom UI components, and modern Android development practices. Integrated Firebase Cloud Messaging, analytics, and logging solutions while actively participating in Agile ceremonies, bug fixes, code reviews, and release activities.

Responsibilities:

Assigned to an Agile development team (5 members) that practiced daily Stand-Up meetings, Scrums, bi-weekly Sprint planning meetings, and bi-weekly Retrospectives.

Performed technical work using Android Studio IDE.

Led My Orders page feature creating from scratch and attending multiple BA documentations.

Utilized Coroutines Framework and implemented Coroutines builders like Launch and Async.

Implemented Coroutines Scope and Custom Dispatcher to have better control of memory release performance.

Utilized GraphQL to leverage API calls.

Utilized Layout Inspector to inspect view hierarchy at runtime and debug complex Android layout hierarchies.

Used Android UI best practices to create RecyclerView display data with performance in mind.

Worked on a VIPER architectural base.

Removed deprecated components and replaced them with custom UI components.

Added Chevron Arrows to the MyOrders page.

Led multiple meetings with UI/UX designers to define the Android branding scope and create the different layouts needed.

Applied JIRA for bug tracking and fixed multiple bugs.

Implemented Wayfair performance, analytics, and logging libraries.

Led multiple Stand-Up meetings across the different iterations in the Agile sprint cycle.

Implemented push notifications features with Firebase’s Cloud Messaging Service.

Freddy’s, Wichita, KS Mar 2020 – Feb 2022

Android Architect

https://play.google.com/store/apps/details?id=com.tillster.frd_us_mobile&hl=en_CA&gl=US

Summary: Served as Android Architect for Freddy’s mobile ordering platform, developing scalable Android applications using Kotlin, MVVM, and RESTful services. Designed reusable UI components and custom networking libraries to improve development efficiency, security, and user experience. Leveraged Retrofit, OkHttp, RecyclerView, and modern Android frameworks to build high-performance features, while ensuring code quality through Mockito, Espresso, and Agile development practices. Collaborated across teams using Git, Bitbucket, Jira, and Confluence to deliver reliable and maintainable mobile solutions.

Responsibilities:

Worked on a team utilizing Agile/Scrum methodologies with daily stand-ups and 2-week sprints.

Worked in Android Studio with coding in Kotlin using an MVVM Android app architecture.

Programmed in Kotlin and supported by RESTful services.

Applied Kotlin extension functions to efficiently re-use existing codes and reduce code duplication to its bare minimum.

Created custom UI components for consistent UX across the company's internal Android applications and for reusability making the development process faster and smoother.

Created custom libraries for internal network calls for security purposes.

Used RecyclerViews and populated lists to display the lists from the database using RecyclerView adapters as the most efficient method.

Used Bitbucket as the version control tool to commit and update the project from the server.

Utilized Mockito and Espresso for testing.

Implemented Retrofit and OkHttp Interceptors, created Header in Network Interceptors.

Implemented various user interface components such as Coordinator Layout, Constraint Layout, RecyclerView, ImageView, and TextView to display the data for the application.

Applied Git for code versioning control.

Documented using Confluence.

Goldman Sachs, New York, NY Jan 2019 – Mar 2020

Sr Android Developer

https://play.google.com/store/apps/details?id=com.gs.mobile.gsnow&hl=en_IN&gl=US

Summary: Developed enterprise financial mobile applications using Kotlin and Android Jetpack components. Implemented scalable architectures, integrated secure backend services, enhanced application reliability, and contributed to delivering market intelligence and analytics features.

Responsibilities:

Worked within an Agile/iterative development methodology and Scrum process.

Developed program specifications, wrote code, tested, and implemented program changes and program development

Maintained ongoing direct communication with Team Leads and Project Managers to ensure task scope was clearly defined and understood, and that deliverables met target deadlines.

Implement core Android Jetpack components for efficient app development.

Designed and implemented the app's architecture using Android Architecture Components, ensuring scalability and maintainability.

Integrated Firebase for features like real-time data synchronization, authentication, and cloud messaging.

Utilized VersionedParcelable for efficient Parcelable implementations.

Incorporated annotations for metadata and code generation in Android Jetpack components.

Implemented and customized UI widgets using Android Jetpack Widgets for an enhanced user interface.

Ensured compatibility with older Android versions using AppCompat.

Integrated GCM for push notifications and real-time communication.

Utilized AndroidX Activity for modern activity implementations.

Implemented and managed activity saved state for seamless user experience during configuration changes.

Implemented media-related features using Android Jetpack Media components.

Developed parts of the application using Kotlin programming language for concise and expressive code.

Integrated Sentry for error tracking and debugging.

Developed test plans and tested/debugged all programs before implementation.

Stash Financial, New York City, NY May 2017 – Jan 2019

Mobile Android App Developer

https://play.google.com/store/apps/details?id=com.stash.stashinvest

Summary: Built secure fintech solutions leveraging MVVM, Kotlin, NDK/JNI, and reactive programming. Developed encrypted communication frameworks, integrated payment and analytics platforms, and optimized large-scale data presentation and application performance.

Responsibilities:

Worked in a large codebase with MVVM data binding library to declaratively bind UI elements, notify views of any database changes, and manage UI-related data in a lifecycle-conscious way.

Implemented NDK to embed C or C++ (“native code”), reused existing libraries, and built Java Native Interface (JNI).

Orchestrated composite sequential REST API calls using functional reactive programming and avoided ‘callback hell’ issues.

Created API request to generate the token request from client app and send encrypted user data with RSA/ESA asymmetric algorithm to the backend.

Integrated Apptimize SDK to target a feature or customized UX to a certain segment of users, A/B testing, and Release Management.

Included web push, email, and in-app messages using OneSignal SDK.

Included Stripe payment mechanism to transfer funds to stock portfolio and buy additional products.

Defined the programming interface that both the client and service agreed upon to communicate with each other using inter-process communication (IPC).

Performed integration testing using Robolectric and automated UI testing using the UI Automator library.

Loaded a list of stocks and significant amounts of financial news and articles on demand from data sources into RecyclerView with Paging library.

Implemented support for multiple DEX files using the MultiDex library.

FCA US LLC, Auburn Hills, MI Feb 2016 – May 2017

Android App Developer

https://play.google.com/store/apps/details?id=com.fca.myconnect.chrysler.nafta&hl=en&gl=US

Summary: Developed connected vehicle mobile applications enabling remote vehicle management, navigation, and real-time notifications. Utilized Android Jetpack, Firebase, Google Maps, and local persistence frameworks to deliver secure and reliable automotive experiences.

Responsibilities:

Used Agile methodology and Scrum practices for project management and development.

Developed the application in Android Studio using MVP architecture pattern.

Implemented SQLite database for persistent data storage and fast data retrieval.

Utilized Android Jetpack Core components for fundamental building blocks of the application.

Employed features like LiveData and ViewModel to manage UI-related data.

Design and implement the app's architecture using Android Architecture Components.

Utilized Room for local database persistence.

Employed annotations for metadata and code generation in Android Jetpack components.

Implemented and customized UI widgets using Android Jetpack Widgets.

Ensured compatibility with older Android versions using AppCompat.

Implemented media-related features using Android Jetpack Media components.

Leveraged IntelliJ IDEA for efficient development.

Integrated Google Maps SDK for mapping functionalities.

Utilized ExifInterface for reading and writing Exif data in image files.

Integrated Firebase for features like real-time database, authentication, and cloud messaging.

Used VersionedParcelable for efficient Parcelable implementations in Jetpack.

Used JIRA for new requirements, issues, bug tracking, and project planning.

United Airlines, Chicago, IL Jan 2014 – Feb 2016

Android Developer

https://play.google.com/store/apps/details?id=com.united.mobile.android

Summary: Developed and enhanced airline mobile applications supporting booking, check-in, boarding passes, and travel management features. Improved application performance, integrated backend services, implemented push notifications, and collaborated closely with product and design teams.

Responsibilities:

Worked in an Agile development environment with peer engineers daily to scope, develop, and deliver a software experience that realizes the product strategy.

Gathered and documented client requirements and managed client expectations.

Planned and conducted code reviews and refactoring activities following best practices.

Worked closely with the back-end team to redesign RESTful web services.

Created a Push Notification Server using NodeJS and implemented MongoDB and MSSQL databases to store unique device keys.

Designed application workflow and wireframe for new modules.

Improved the performance of the UI by implementing Fragments and RecyclerView.

Improved the user experience by including Android wear compatibility

Worked closely with designers to create the look and feel of the application meeting Google's design standards while following the company's corporate identity guidelines.

Integrated Facebook and Twitter for social networking.

Designed and implemented a module for users to review their historic travel information.

Utilized Git version control tool as the source control management system.

Followed Test-Driven-Development (TDD) and used Mockito PowerMock and Espresso for our default testing frameworks.

Utilized Jenkins for continuous integration.

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