Abidullah Bin Junaid
Abidullah Bin Junaid

Senior Android Engineer

Actively looking · Member since 12 Sep 2025
Message
Location
United States
Desired salary
from 65 USD/hourly
Work preference
Full Time
Experience level
Not set

About

Professional summary

I am an experienced Android Developer with over 10 years of expertise in building and deploying both enterprise and consumer applications. My proficiency lies in Kotlin, Java, Jetpack Compose, RESTful APIs, and integrating third-party services such as Twitter, Facebook, and Google Maps. I have a strong background in SQL/SQLite databases, debugging, and testing methodologies including TDD, unit, and integration testing, covering the full software development lifecycle.

Throughout my career, I have worked extensively with build tools like Gradle and Maven, Python scripting, and have experience publishing apps on Google Play. I am known for my problem-solving skills, performance tuning capabilities, and my ability to thrive in both fast-paced team environments and independent roles.

I have held senior engineering roles at major companies such as Meta, FedEx, Cigna, HEB, and Marriott, where I contributed to enhancing large-scale Android codebases, building automated refactoring tools, designing optimized databases, and ensuring code quality through rigorous reviews and testing. I am also experienced in backend development using Java Spring Boot and have collaborated cross-functionally with product, design, QA, and clients to deliver high-quality digital experiences.

My technical expertise extends to Android tools and IDEs including Android Studio, Eclipse, and XCode, as well as version control systems like Git, SVN, and Mercurial. I am well-versed in architectural patterns such as MVVM and MVP, and have supported CI/CD pipelines using Jenkins. I am committed to maintaining high standards of code quality, security, scalability, and performance in all projects I undertake.

I hold an MBA in Computer Science from the University of the Cumberlands and a Master of Science in Computer Science from Kent State University. I continuously seek to provide strategic engineering guidance and improve technology standards and processes within teams and organizations.

Skills

16 capabilities

Experience

Career history

Sr. Android Engineer Meta, TX

Enhanced large-scale Android codebases using Kotlin, Java, and Jetpack Compose, ensuring performance, scalability, and maintainability. Built automated code refactoring tools with Buck, JStype, and Meta’s internal frameworks. Designed and optimized databases and integrated APIs/back-end services. Ensured code quality with rigorous reviews, unit/integration testing, and UI automation in CI pipelines. Resolved production issues with Meta observability tools and collaborated cross-functionally.

Sr. Android Developer / Full Stack FedEx, TX

Developed and maintained Android apps using Kotlin, Java, Jetpack Compose, RxJava, and Google Maps APIs. Built and optimized backend services with Java Spring Boot, Maven, and J2EE. Ensured code quality through unit testing, code reviews, and adherence to coding standards. Supported CI/CD pipelines with Jenkins and API validation via Insomnia/Postman. Collaborated with Product, Design, QA, and clients. Scoped, architected, and implemented new features independently.

Software Engineering Senior Advisor Cigna, TX

Built native Android apps with Kotlin, Java, MVVM/MVP, Jetpack Compose, and Shared Flows. Integrated APIs, Okta authentication, and third-party libraries. Ensured code quality through code reviews and architectural recommendations. Supported CI/CD pipelines and deployed apps efficiently. Provided strategic engineering guidance on process improvements and technical documentation.

Sr. Android Engineer HEB, TX

Developed native Android apps with Kotlin, Java, MVVM, Navigation components, coroutines, and GraphQL API integrations. Engineered robust View Models with unit testing. Led code reviews and enforced coding standards. Maintained CI/CD pipelines and resolved production issues. Provided technical guidance through reports on tech stacks and processes.

Sr. Android Engineer Marriott, FL

Developed customer-facing Android apps using Java & Kotlin with MVVM, data binding, and dependency injection. Integrated RESTful APIs, mobile SDKs, push notifications, biometric authentication, and in-app messaging. Implemented transaction management, caching, and multi-OS/device support. Followed Agile methodology with TDD. Leveraged external data sources and UI frameworks to optimize usability.

Android Developer AT&T Dallas, TX

Android Developer Samsung, NJ

Android/Java Developer Verizon, FL

Built Android applications with Kotlin/Java; integrated REST/SOAP APIs, SQLite/Cassandra, and third-party libraries. Conducted unit tests, debugging, and app deployment.

Android & Python Developer Freelance / Earlier Roles

Delivered multiple Android apps using Kotlin/Java; integrated REST APIs and location services. Used Agile and TDD practices to ensure quality and timely delivery.

Education

Learning history

University of the Cumberlands, KY

MBA in Computer Science

GPA 3.8

Kent State University, OH

MS in Computer Science

GPA 3.6

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