Top Senior Android Engineer Jobs in Chicago, IL

Leads Android feature delivery for enterprise payment and point-of-sale applications. Designs and develops production Android solutions using Java and Kotlin, ensures architecture and coding standards, guides implementation and backlog execution, mentors engineers, and promotes quality, testing, CI/CD automation, and agile engineering practices.

Design and deliver Android system applications for Toast POS devices, including device policy enforcement, setup, firmware and app updates, background services, and fleet deployment. Lead technical design, cross-functional planning, Android and hardware upgrades, automated testing, production issue investigations, and staged rollouts. Mentor engineers and collaborate with product, hardware, QA, and software teams to build secure, reliable device-management systems.

Build and scale customer-facing Android marketplace features using Kotlin, Jetpack Compose, and modern Android technologies. Develop tested, production-ready software, use AI tools for coding and debugging, maintain reliability, and collaborate with Product, Design, backend, iOS, QA, and senior Android engineers. Contribute to platform concerns including authentication, analytics, feature flags, and CI while growing end-to-end feature ownership.

Build and ship native Android features for onboarding, accounts, cards, payments, transfers, rewards and AI-assisted journeys. Turn complex financial flows into simple mobile experiences, own app quality (performance, crashes, loading states), integrate APIs and secure authentication, and iterate using production feedback and analytics while collaborating with product, design, backend and AI engineers.

Develop and maintain high-quality Android applications across their full lifecycle. Responsibilities include writing reusable code, creating unit and UI tests, debugging and optimizing performance, monitoring stability with Crashlytics and ANR reports, implementing analytics tracking, supporting feature rollouts and A/B testing, maintaining legacy apps, and collaborating with Product, QA, Backend, and Design teams.

Leads architecture, development, testing, performance optimization, and technical ownership of mission-critical Android applications. Builds modern Jetpack Compose interfaces, establishes automated testing strategies, mentors engineers, conducts code reviews, drives technical standards, and delivers concurrent initiatives. Requires deep Android, Kotlin, Java, native C/C++, debugging, profiling, and CI/CD expertise while collaborating with product and platform teams.

Develops and designs Android application features, collaborates with product, design, and engineering teams, reviews code, writes unit tests, supports Agile/Scrum practices, monitors performance, documents technical work, and assists with deployment and continuous improvements.

Develop Android mobile applications for public safety customers across requirements gathering, architecture, design, development, testing, deployment, maintenance, and enhancement. Preferred experience includes Kotlin, Android Framework components, Android security, RESTful APIs, Git, object-oriented development, Agile methodologies, Android Studio, and mobile application development.

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.

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.

Design, train, deploy, monitor, and optimize speech and NLP models for a voice-agent platform. Build MLOps pipelines, APIs, and inference services while developing Android and iOS applications that integrate AI, voice, real-time communication, and backend services. Create frontend prototypes and dashboards, conduct model experiments, evaluate vendors, optimize performance, document systems, and maintain engineering quality across collaborative teams.

Design, build, and ship native Android features in Kotlin for BJAK's AI Neobank app. Integrate backend APIs, improve performance, reduce crashes, collaborate with product/design, use analytics to iterate, and add on-device AI where it improves UX.

Designs, develops, and maintains automated test frameworks and suites for native Android applications. Integrates mobile testing into CI/CD pipelines, executes tests across emulators and physical devices, investigates failures, improves application testability, and validates behavior across Android versions and device configurations. Collaborates with Android Engineering, QA, and Product teams while contributing to automation architecture, tooling standards, and testing best practices.

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.

Seeking an experienced Android Developer with 5+ years of mobile application development, expertise in Xamarin and .NET technologies, and strong project management skills.

Design, develop, test, operate, and maintain iOS applications and mobile SDKs. Write production-ready, testable code, ensure scalability, reliability, and security. Troubleshoot issues across mobile and backend, perform code reviews, and work within agile and DevOps practices to support high-scale production systems.

Build and ship features for a large-scale Android app using Kotlin and modern Android technologies. Responsibilities include writing tested code, collaborating with product and design teams, improving performance and stability, partnering on APIs and data flows, and participating in code reviews. The role is a full-time, long-term remote contract within the U.S.

Build and architect scalable Android client code, UI frameworks, tooling, and server-driven UI architecture using Kotlin, Compose, GraphQL, and related technologies. Establish engineering best practices, automated testing, and modernization strategies; collaborate across client and server teams; influence architecture roadmaps; mentor engineers; and deliver forward-looking technical solutions with minimal supervision. The role supports Netflix experiences across millions of users and thousands of devices.

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.

Build and maintain mobile applications using React Native and native iOS/Android technologies. Write performant, maintainable code, participate in product and platform design discussions, support prototyping and internal testing, and test/debug apps across many devices. Ship production-quality mobile apps; published apps preferred.

Lead feature design and delivery for Android applications within a large payments program. Provide technical direction, ensure architecture and coding standards, collaborate with Product Owner, mentor engineers, guide planning and execution, and ensure solutions meet acceptance criteria with minimal technical debt. Work with CI/CD, REST APIs, and payment/point-of-sale integrations.

Build and own a clinical Android tablet app for a TMS medical device: implement USB/serial hardware integration, native bridges, binary protocols, robust safety/error handling, reliable medical data sync to cloud, and mentor engineers while ensuring polished UX and clinical-grade reliability.

Integrate secure identity and authentication capabilities into native iOS and Android applications supporting a Federal DoD ICAM platform. Responsibilities include implementing Okta SDKs, OAuth/OIDC, PKCE, FIDO2/WebAuthn, passkeys, CAC/PIV credentials, biometric authentication, secure token storage, enrollment and recovery workflows, and mobile security controls. The role also supports NIST compliance, Zero Trust principles, CI/CD, troubleshooting, and collaboration with Federal cybersecurity and mobile engineering teams.