Senior Android Developer - W2 Only

About the Role

The Senior Android Developer will design, build, and ship production-grade Android capabilities for an enterprise-scale consumer banking app. This hands-on, delivery-oriented role focuses on modern modular Android architecture, Kotlin, Jetpack Compose, Coroutines/Flow, performance optimization, automated testing, CI/CD, and production support in a regulated mobile environment.

Responsibilities

• Design and build feature modules in Kotlin using clean architecture patterns such as MVVM and MVI, with clear boundaries, testable units, and independent delivery.
• Build declarative user interfaces in Jetpack Compose, including state hoisting, recomposition performance, custom layouts, and interoperability with legacy Views.
• Manage asynchronous and reactive state with Coroutines and Flow, including structured concurrency, backpressure, and lifecycle-aware collection.
• Integrate mobile experiences with backend services through REST, GraphQL, or gRPC, including offline caching and secure local storage.
• Own app performance across cold start, jank/frame time, memory, and APK or bundle size against measurable targets.
• Build and maintain automated test suites, including unit tests, UI/Espresso tests, Compose UI tests, screenshot tests, and regression coverage.
• Deploy through CI/CD pipelines with staged rollouts, feature flags, and crash/ANR monitoring.
• Instrument the app for observability through analytics, tracing, crash reporting, dashboards, alerts, and operational runbooks.
• Participate in design and architecture reviews where technical decisions affect downstream feature teams.
• Debug complex Android issues, including lifecycle edge cases, memory leaks, threading/concurrency defects, and device fragmentation problems.
• Own the vertical from design decision to shipped artifact and leave the codebase cleaner, more documented, and easier for the permanent team to operate.

Requirements

• 5+ years of software engineering experience shipping production mobile applications.
• Deep, demonstrated Kotlin and Android SDK expertise.
• Production experience with Jetpack Compose, including state management, recomposition performance, and legacy View interoperability.
• Strong grasp of Coroutines, Flow, structured concurrency, and modern Android architecture.
• Experience with Android architecture components such as ViewModel, Navigation, Room, WorkManager, and DataStore.
• Experience with automated testing and CI/CD for Android.
• Experience shipping apps to the Google Play Store at meaningful scale.
• Ability to write code, design systems, debug production issues, and support software that real customers depend on.

Preferred Qualifications

• Experience with modularized Gradle builds and multi-team Android codebases.
• Kotlin Multiplatform experience or practical exposure to shared business logic approaches.
• Performance optimization experience using Baseline Profiles, Macrobenchmark, Android Studio Profiler, and Perfetto.
• Dependency injection experience with Hilt or Dagger.
• Experience with networking stacks such as Retrofit and OkHttp, serialization, and API contract design.
• Experience with offline-first patterns, caching, local persistence, secure storage, auth/token handling, and mobile security fundamentals.
• Experience in regulated industries such as financial services, healthcare, or insurance, where compliance and auditability are engineering constraints.
• Contributions to internal tooling, shared libraries, or design systems adopted by other teams.

Operating Environment

• Work within a large-institution environment with compliance requirements, audit trails, and change management processes.
• Partner with product owners, mobile architects, and adjacent feature teams to take experiences from design mock to production.
• Operate with engineering autonomy on the how, while product teams own the what.
• Move quickly inside established guardrails and support code that can be defended, maintained, and operated after the engagement ends.
• Treat the one-year contractor engagement as a shipped-outcomes role, measured by delivered code, documented patterns, and systems the permanent team can operate.

Screening Criteria

• Can walk through production Android applications they personally helped ship at scale.
• Can explain Compose state-management decisions, recomposition performance issues, and legacy View interop tradeoffs.
• Can describe real examples of cold-start, frame-time, memory, ANR, or crash-rate improvements.
• Has hands-on Kotlin, Coroutines, Flow, and Android architecture experience beyond sample apps or prototypes.
• Can demonstrate automated testing discipline and experience using CI/CD, feature flags, staged rollouts, and production monitoring.
• Can work effectively in a regulated production environment with compliance, auditability, and change-management constraints.