Android Developer

Accountable for executing and driving mid-size feature application design and development efforts to completion, serving as a development lead on medium-scale projects and supporting the execution of larger efforts.

Proficient at operating with considerable autonomy and discretion as you will significantly influence the way an application is designed and developed by providing subject specific expertise and an advanced level of understanding of application programming principles.

Sought after due to ability to analyze and troubleshoot coding, application performance and design challenges.

Capable of research in root cause of development and performance concerns as well as the resolution of defects.

Have a deep understanding of the technical requirements for the solutions being built.

Understand engineering needs including those required to build, maintain, and operate the system through all phases of its life.

Proficient in information modeling, data structures and algorithms.

Understand maintenance characteristics, runtime properties and dependencies that exist in support of your system s software. These dependencies will include but not limited to: hardware, platform, operating system, performance and load requirements, as well as contingencies with upstream and downstream systems.

Demonstrate an advanced understanding of supported main system flows and possess a comprehensive understanding of how the system and others (i.e. architecture or infrastructure) collectively integrate to contribute towards achieving business objectives. Using this expertise, assist with the development of standards for coding, testing, debugging and implementation. This will ensure application design adheres to the overall architecture blueprint.

Participate in design discussions as a Development Lead and as such will play the part of a key decision maker in driving design decisions. This is evidenced by your knowledge of the application code details and your experience with the technology and teams engaged.

Work with limited guidance, seeking guidance only as needed as the development and delivery strategy is defined; the design is not.

Exhibit the ability to turn complex application design into a well written application.

Partner with industry vendors that provide technology or user experience design components that support our Digital architecture and work with vendors on our implementation plans and roadmaps identifying partnership opportunities to increase our development velocity and our learnings.

Participates in the full development life cycle, identify dependencies between agile and waterfall delivery, working within broadly defined parameters, including test plan execution and software quality needs

Directly impact the business by influencing strategic functional decisions through advice, counsel or provided services. This will require persuading and influencing others through strong and comprehensive communication and diplomacy skills.

Communicate progress, anticipate bottlenecks, provide escalation management, identify, assess, track and mitigate issues/risks at multiple levels.

Recognize discordant views and take part in constructive dialog to resolve them.

Work across teams to optimize processes.

Regularly review metrics and proactively seek out new and improved mechanisms for visibility ensuring your program stays aligned with organization objectives.

Continuously assess development processes, test plans, and operations.

Work with teams to improve concurrent project delivery.

Streamline and / or eliminate excess process in any area of architecture, build, delivery, production operations environment, or business area where the same efforts (or issues) are repeated year-over-year.

Share knowledge with the team in various forums (brown bags, engineering forums etc.) and demonstrate a higher level of knowledge through industry certifications

Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency.

5+ years of professional experience in native mobile application development

5+ years of hands-on experience with Kotlin (strong preference for Kotlin-first development; Java familiarity a plus)

5+ years of experience building and shipping enterprise-grade native Android applications at scale

Deep understanding of the Android SDK, platform lifecycle, and Google ecosystem (Jetpack, Android Runtime, etc.)

Strong understanding of Android internals memory management, process lifecycle, activity/fragment back stack, and app lifecycle at a low level

Experience with networking layers, Retrofit, OkHttp, and custom network stack implementations

Proficiency with data persistence strategies (Room, SQLite, DataStore, SharedPreferences, EncryptedSharedPreferences)

Solid understanding of security best practices at the OS level (certificate pinning, Android Keystore, data encryption, ProGuard/R8 obfuscation)

Familiarity with performance profiling and optimization using Android Studio Profiler (memory leaks, CPU usage, rendering bottlenecks, battery impact)

Solid hands-on experience with multi-threading and concurrency Kotlin Coroutines, coroutine scopes, dispatchers, and channels

Proficiency with Kotlin Coroutines & Flow (structured concurrency, StateFlow, SharedFlow, cold vs. hot streams)

Experience with WorkManager for background task scheduling and constraint-based execution

Ability to identify and resolve concurrency-related issues such as race conditions, deadlocks, and thread contention

Experience writing thread-safe code using synchronization primitives (Mutex, Semaphore, atomic references)

Proven experience with core structural/architectural design patterns such as MVC, MVP, MVVM, or MVI (Model-View-Intent)

Experience designing and implementing modular, scalable app architectures suitable for large enterprise codebases

Strong understanding of dependency injection using Hilt or Dagger, and SOLID principles in Kotlin

Demonstrated ability to decompose complex screens into reusable, composable UI components (not just building screens end-to-end)

Experience building and maintaining shared UI component libraries or design systems within an Android codebase

Proficiency with Jetpack Compose and/or traditional XML-based Views, including interoperability between the two

Experience with ConstraintLayout, dynamic theming, accessibility (a11y), and adaptive layouts for various screen sizes and densities

Experience writing and maintaining unit and UI test cases using JUnit, Espresso, and/or Compose UI Testing

Familiarity with test-driven development (TDD) or behavior-driven development (BDD) practices

Experience with mocking and stubbing using Mockito or MockK, and structuring code for testability

Ability to integrate tests into CI/CD pipelines (e.g., GitHub Actions, Bitrise, Jenkins, Gradle)

2+ years of experience leveraging AI coding tools (e.g., GitHub Copilot, Cursor, ChatGPT, Android Studio AI features) to accelerate development workflows

Demonstrated ability to write effective prompts to generate, refactor, debug, or document Kotlin/Android code using AI tools

Ability to critically evaluate and validate AI-generated code for correctness, security, and performance before integration