Top Senior Android Developer Jobs in Philadelphia, PA

Develop scalable enterprise Android applications using Kotlin, Java, Android SDK, Jetpack, and modern architecture patterns. Build accessible interfaces, integrate backend services, implement asynchronous processing and data persistence, and develop commerce features such as search, checkout, payments, and order processing. Write automated tests, troubleshoot production issues, support releases and CI/CD, conduct code reviews, and collaborate with product, design, backend, and QA teams. Travel and relocation across unanticipated U.S. locations are required.

Develop and enhance Android SDKs, tools, and applications supporting payment transactions and kiosk-mode devices. Design, implement, debug, and optimize complex software using Kotlin, Jetpack Compose, Coroutines, Flow, dependency injection, and large multi-module architectures. Integrate REST services, payment hardware, peripheral devices, and vendor SDKs while contributing to code reviews, technical planning, testing, and architectural decisions. The role also supports secure, PCI/EMV-compliant commerce applications.

Develop and modify Android system services, privileged APIs, and OS-level AI integrations. Build interfaces for AI agents to interact with Android functionality while managing permissions, IPC, application lifecycles, background execution, performance, and resource consumption. Collaborate with agent engineers and debug Android Framework or AOSP components. Preferred experience includes custom ROMs, AOSP contributions, C++, System UI, background services, and power management.

Build and deliver Android features for rewards discovery, shoppable content, partner integrations, and purchase attribution. Develop within a large modular Kotlin and Jetpack Compose codebase, collaborate with product, design, backend, data, and marketing technology teams, and improve performance, reliability, engagement, and rewards redemption through testing, profiling, and scalable architecture.

Develop and release Android features for rewards discovery, shoppable content, partner integrations, and purchase attribution. Build within a large modular architecture using Kotlin, Jetpack Compose, MVVM, Hilt, Room, and modern Android tooling. Collaborate with product, design, backend, data, and marketing technology teams while improving performance, reliability, engagement, and rewards redemption across Fetch’s mobile platform.

Build and scale customer-facing Android marketplace applications using Kotlin, Compose, and modern Android architecture. Own complex features end to end, lead technical direction, improve testing and CI/CD, support releases and observability, and modernize legacy codebases. Use AI tools for coding, testing, debugging, documentation, and operational efficiency while mentoring engineers and collaborating with product, design, backend, platform, QA, and iOS teams.

Design, build, and maintain high-quality Android applications using Kotlin/Java. Collaborate with product, design, backend, and QA teams to implement features, fix bugs, optimize performance, and ensure code quality through testing, code reviews, and CI/CD workflows.

Lead the architecture, development, testing, deployment, and maintenance of Android applications supporting Philadelphia City services. Build Kotlin-based applications with modern Android frameworks, integrate APIs and backend services, ensure accessibility, security, and performance, and support Google Play submissions. Collaborate with product, design, engineering, and City stakeholders; conduct code reviews, mentor developers, troubleshoot mobile issues, and contribute to CI/CD, monitoring, and agile delivery practices.

Own Android features end to end, from identifying user needs through development, launch, and performance evaluation. Build idiomatic, well-tested Kotlin and Jetpack Compose applications, shape product direction, and collaborate with design, leadership, and engineers across Android, iOS, web, and backend. Drive decisions in ambiguous situations, improve mobile engineering standards, and contribute to product strategy while working remotely with distributed teams.

Develop and lead frontend platform engineering for native and hybrid mobile applications. Build reusable, well-tested Android and iOS SDK components, contribute to architecture and system design, collaborate with product and engineering teams, own customer-facing deliverables, and identify product improvements while maintaining strong engineering standards.

Build and own Android growth and monetization experiments across subscriptions, pricing, advertising, purchases, and upgrade flows. Partner with product, design, data science, and analytics to instrument experiments, manage staged rollouts, monitor performance, and act on results. Use AI tools throughout development, contribute to Android architecture and engineering practices, participate in on-call support, mentor engineers, and help scale reliable mobile experiences to tens of millions of users.

Build and improve scalable, accessible Android applications for Wikipedia and Wikimedia users worldwide. Responsibilities include leading technical discovery and system design, implementing Kotlin and Jetpack Compose features, optimizing performance, developing testing and observability practices, managing delivery risks and scope, and collaborating with product, design, analytics, and engineering teams.

Build and maintain iOS features for Comcast's Home Security IoT products. Collaborate with product, backend, and device teams to deliver end-to-end solutions, contribute to app architecture, implement Spec-Driven Development UIs, integrate REST APIs, improve performance and reliability, and debug complex production/connectivity issues.

Develop and maintain Android features for Comcast's Home Protection mobile experiences, collaborating with product, backend, and device teams. Contribute to app architecture, implement Spec-Driven Development UI frameworks, integrate REST APIs, improve performance and reliability, debug production connectivity issues, and participate in code reviews to support scalable, maintainable Kotlin codebases.

Develop and maintain scalable native Android applications using Kotlin, focusing on performance, usability, architecture, testing, and code quality. Collaborate with product, design, and backend teams; troubleshoot complex issues; maintain CI/CD workflows; document systems; lead technical initiatives; mentor junior engineers; and contribute to feature planning and estimation.

Lead hands-on development of user-facing Android and iOS applications, taking ownership from design through production release. Build maintainable, well-tested features, optimize performance, debug unfamiliar systems, and manage app-store publishing. Collaborate with product, design, backend, and users in an agile, remote environment. Use AI coding agents responsibly to accelerate implementation, testing, reviews, infrastructure work, and incident investigation.

Build, test, release, and maintain native Android and iOS applications across a portfolio of consumer mobile products. Use Kotlin, Swift, modern mobile frameworks, automated testing, analytics, experimentation, and AI coding agents to deliver high-quality software. Collaborate with product, design, marketing, operations, and engineering teams, measure user impact, manage app-store releases, and adapt across codebases and product pods.

Own Android and iOS mobile development for a large consumer VPN product. Inherit and modernize existing codebases, integrate native VPN networking libraries, improve security, testing, CI/CD, release management, and app-store compliance. Collaborate with product, design, backend, DevOps, and marketing teams to deliver reliable user-facing features. Diagnose networking issues across mobile and Go components, optimize connection performance, and use AI coding agents responsibly.

As a Staff Software Engineer, you will define technical strategy for Drive-Thru solutions, standardize Android practices, and ensure seamless integration between mobile clients and backend services while mentoring peers.

The role involves architecting and developing mobile healthcare applications, ensuring security and usability, and managing multiple development teams.

Build and ship robust Android features for ClassPass in a large modular codebase. Collaborate with product and design, mentor junior engineers, conduct code reviews, write technical documentation, solve complex problems, improve systems, and contribute to architectural decisions using Kotlin and Jetpack Compose.

Design, develop, and maintain scalable Android applications using Kotlin/Java and Jetpack components. Integrate REST APIs, optimize performance and security, participate in architecture and deployment activities, troubleshoot and resolve issues, and collaborate with cross-functional teams in an Agile environment while supporting CI/CD and release management.

Design and implement Kotlin/Java Android apps, frameworks, and SDKs for vehicle infotainment (AOSP/AAOS). Use test-driven development, collaborate with UX, product, cluster, and mobile teams, contribute to architecture and code reviews, and deliver high-quality embedded HMI features for EVs.