Senior Android Developer

About StravaStrava is the ultimate app for active individuals, boasting a community of over 180 million athletes across more than 185 countries. It transcends simple workout tracking; it's a platform where athletes progress together, fostering new habits and achieving personal bests. Regardless of your sport or tracking method, Strava is your go-to companion. Connect with your community, achieve your goals, and make every effort count. Start your journey with Strava today.Our mission is clear: to inspire individuals to lead their best active lives. We believe in the transformative power of movement to unite and propel people forward.About This RoleWe are looking for a Senior Android Engineer to join the Subscriptions Team, focused on enhancing Strava’s subscription and checkout experiences. You will develop the Android interfaces that facilitate our transition from free to paid options, including paywalls, purchasing flows, and Google Play Store integrations, impacting millions of athletes worldwide. This role is vital to Strava’s growth and provides significant ownership over highly visible product features.In this position, you will collaborate closely with product, design, analytics, and marketing teams, while also engaging with Strava’s extensive Android community through architecture reviews, code reviews, pair programming, and our active Android guild. Join the team behind the leading fitness app and the 2025 Apple Watch App of the Year as we continue to set standards for Android excellence.We follow a flexible hybrid model, requiring you to be on-site in our San Francisco office for three days a week.What You’ll Do:Lead the Android initiatives on the Subscriptions team, establishing the technical vision and delivering features that impact millions.Drive Strava’s subscription growth through lifecycle experimentation including upsells and checkout enhancements.Maintain and improve our Google Play Billing integration, ensuring critical business processes are stable and reliable.Collaborate closely with product and design teams to deliver polished features in small, focused increments.Mentor fellow engineers through code reviews and pair programming, setting the standard for Android quality across the organization.Leverage the latest AI tools to identify efficient and innovative software development methods.

Waymo is a pioneering company in autonomous driving technology, dedicated to becoming the world's most trusted driver. Originating as the Google Self-Driving Car Project in 2009, Waymo has remained focused on developing the Waymo Driver—The World's Most Experienced Driver™—to enhance mobility access while significantly reducing traffic-related fatalities. The Waymo Driver is the backbone of Waymo's fully autonomous ride-hail service and is adaptable across various vehicle platforms and applications. Having completed over ten million rider-only trips, it has amassed experience through more than 100 million miles driven autonomously on public roads and tens of billions of miles simulated across 15+ U.S. states.Waymo's commercial operations currently span five cities, with a robust infrastructure in the early stages of development, necessitating further investment to scale into a world-class service.We are assembling a talented team of engineers to elevate our Android Platform team. This team is responsible for crafting the user interfaces that allow customers to engage with our autonomous vehicles, providing entertainment and information during their rides. As a full-stack team, we oversee the setup and ongoing maintenance of a complete automotive-grade Android system.In this hybrid role, you will report directly to an Engineering Manager.

Join Reddit's Test Engineering team as a Senior Software Engineer, where you will play a pivotal role in ensuring the highest quality of software features. Collaborate with cross-functional teams to design and implement robust test automation frameworks and tools, while fostering a culture of quality across all engineering initiatives. Your expertise will help identify testing gaps and drive systemic improvements, enhancing our testing processes and infrastructure stability.

At Lyft, we are driven by our mission to connect communities and enhance mobility. We focus on fostering an open, inclusive, and diverse culture that empowers our teams. As part of our Mobile Foundations team, you will play a pivotal role in developing robust software solutions that tackle large-scale challenges, ensuring our mobile applications are not only stable but also scalable and efficient.In your role as a Senior Android Engineer, you will be responsible for creating and maintaining the core systems that serve as the backbone for all Lyft mobile engineers. Your contributions will enable teams across the organization to deliver exceptional experiences that seamlessly connect people and places. You will be instrumental in building scalable infrastructure that accelerates innovation while prioritizing an outstanding developer experience. Your efforts will directly enhance the stability of Lyft as a whole.Our mobile applications are utilized by millions, and we take pride in maintaining high development standards. We follow best practices in code architecture and embrace rapid release cycles. Our codebase is primarily written in Kotlin, leveraging modern design patterns and coding practices. We also actively engage with the developer community, contributing to open-source projects, including the Kotlin language itself.

At Nestmed, we are revolutionizing healthcare documentation with our innovative AI platform, empowering clinicians to focus on what matters most - patient care.In just one year, we've expanded our reach to support tens of thousands of healthcare professionals across over a million patient visits. We proudly serve as a trusted partner for more than 60 home health agencies, including seven of the top ten enterprises in the United States.Our founding team, comprised of experts from Stanford, Y Combinator, Google, and Meta, is backed by the visionary founders of PayPal and Plaid. Together, we aim to establish the vital infrastructure for the future of the $500 billion home healthcare industry.Join Us!We are looking for a Senior Android Engineer to take the reins of our mobile application, the critical interface for clinicians documenting care in patients' homes. Your work will involve real-time voice capture, background processing, and ensuring seamless synchronization even in challenging network conditions. Collaborating closely with our CEO and CTO, you will tackle complex technical challenges and help shape our mobile platform as we continue to scale.

About UsAt XOXO AI, we are a cutting-edge research lab dedicated to creating intelligent interfaces that enhance everyday life. Our stealth team comprises passionate engineers, designers, and researchers who are committed to solving innovative challenges that extend beyond the workplace.Following a recent breakthrough in infrastructure, architecture, and model layers, we are eager to welcome talented builders to craft the interface and application layer that will realize our ambitious vision.About the RoleWe are seeking an experienced Android engineer to lead the development of XOXO's consumer app, featuring a revolutionary interface for intelligence. This position is ideal for a highly skilled engineer who can take ownership of the entire mobile experience, focusing on architecture, performance, refinement, and a visually engaging design system that ensures intentionality in every interaction.Your background is less important than your drive: you should possess a strong sense of ownership, be able to work swiftly without compromising quality, and be eager to create a mobile product that redefines excellence in both craft and performance.What You’ll DoDesign and launch the initial versions of our React Native app, guiding it from prototype to production.Convert a highly visual design system into reusable components, motion, and interaction patterns with seamless performance.Develop new product surfaces that integrate modern AI/ML capabilities in a user-friendly manner on mobile.Enhance the app's performance across various dimensions: rendering, startup time, memory usage, battery efficiency, networking, and perceived speed.Establish high standards for mobile engineering quality (testing, instrumentation, release discipline) and collaborate closely across the tech stack to deliver comprehensive solutions.

About UsTransforming Language LearningAt Speak, we are on a mission to revolutionize language learning by making it accessible and effective for everyone. With language learning being a gateway to new cultures and career opportunities, we've developed an AI-powered tutor that offers a unique conversation-first experience. Learners get to speak, receive instant feedback, and progress through meticulously crafted lessons, ensuring a seamless journey from beginner to fluent speaker.Since our inception in South Korea in 2019, Speak has rapidly grown to become the leading language learning app, catering to learners in over 15 languages and various markets. With backing from prominent investors such as OpenAI and Accel, we pride ourselves on being a top player in the AI technology sector, with a diverse team spread across major cities including San Francisco, Seoul, and Tokyo.About This RoleWe are seeking a talented Senior Android Engineer to join our dynamic engineering team. In this role, you will contribute to enhancing our content delivery, executing A/B tests for monetization features, and facilitating the launch of new markets and languages. Your collaboration with backend engineers and cross-functional partners in Product and Design will be crucial as you deliver impactful product features to millions of users.Key ResponsibilitiesDevelop and optimize growth loops including referrals and in-app shareable content.Enhance user acquisition strategies and boost user retention rates.Contribute to pricing strategies and packaging solutions.Support the launch of new markets and language offerings.Refine our text-to-speech capabilities.Improve audio and video streaming systems for a better user experience.Qualifications5+ years of experience as a Mobile Engineer, ideally within a fast-paced startup environment.Strong proficiency in Kotlin, with a deep understanding of mobile architectures like MVC and MVVM.Bonus: Experience with Jetpack Compose and mobile streaming technologies.

About Abby CareAt Abby Care, we are dedicated to revolutionizing family caregiving in America. Our mission tackles one of the most pressing challenges faced by over 50 million unpaid family caregivers: providing them with the training and employment they deserve for the vital care they offer at home.We are creating a powerful, tech-driven family care platform that enhances the caregiving experience, improves health outcomes, and delivers exceptional support nationwide.As we expand our mission, we are seeking passionate individuals to join our team. Our partnerships with leading healthcare providers, insurance plans, and community organizations, along with the backing of top-tier, mission-focused venture capitalists, empower families across the country. You will become part of a talented team with expertise from renowned companies such as Uber, Scale AI, DoorDash, Dropbox, and Meta.The RoleWe are in search of a motivated and skilled Senior Software Engineer, Mobile (iOS & Android) to join our team. You will report directly to the VP, Head of Engineering. This is a full-time role based in San Francisco, CA (4 days in-person).In this position, you will be at the forefront of transforming family caregiving through innovative, AI-driven mobile solutions. You will lead the development of our mobile applications, ensuring they are user-friendly, intuitive, and robust for family caregivers. Recognizing that our users may not be tech-savvy and may utilize the app in various environments with inconsistent connectivity, you will create solutions that function seamlessly in real-world conditions, establish a comprehensive testing framework, and implement reliable updates that families can depend on daily.Key Responsibilities:Oversee the entire mobile app development lifecycle. You will take ownership from initial concept through to delivery, including technical design, core feature implementation, performance optimization, and oversight of release cycles for both iOS and Android platforms.Create an intuitive and resilient caregiver-focused experience. You will develop user flows that are straightforward, guided, and forgiving, tailored for non-technical users, ensuring the app remains functional in low-connectivity situations.

Join our innovative team at StemXpert1 as an Android Engineer, where you will be at the forefront of mobile application development. You will collaborate with cross-functional teams to design, implement, and maintain high-quality Android applications that deliver exceptional user experiences.

Join Substack as an Android Engineer and help us build a vibrant community for writers and readers. In this role, you will develop and enhance our Android application, ensuring that it provides the best possible experience for our users. You will collaborate closely with product managers, designers, and other engineers to deliver high-quality features and improvements.

Join Our Innovative TeamThe ChatGPT team at OpenAI is at the forefront of our mission to innovate across core domains, including Growth, Personalization, and Search Infrastructure. We are expanding our talented teams to create cutting-edge experiences, tools, and systems that enhance ChatGPT's functionality across all user platforms.Your Role as an Android EngineerWe are seeking a skilled Android Software Engineer to take the lead in developing exciting new features for the ChatGPT Android application.Key Responsibilities:Craft and implement innovative features and functionalities for the ChatGPT Android app.Set and uphold rigorous engineering standards focusing on performance, reliability, and code quality.Collaborate with cross-functional teams to design user-centric experiences.Influence technical decisions and establish a robust long-term architecture for mobile platforms.Provide mentorship and guidance to peers through code reviews and shared ownership.Ideal Candidate Attributes:Proficient in Android development using Kotlin/Java, modern architectural patterns, and Jetpack.A passion for enhancing mobile UX and optimizing system performance.Thrives in dynamic, collaborative environments.We are open to candidates in San Francisco, New York, and Seattle.About OpenAIOpenAI is a pioneering AI research and deployment organization dedicated to ensuring that general-purpose artificial intelligence serves the interests of humanity. We actively push the boundaries of AI capabilities while prioritizing safety and human-centric design in all our products. Our commitment to inclusivity drives our mission to incorporate diverse perspectives, experiences, and voices, reflecting the full spectrum of humanity.We are proud to be an equal opportunity employer, embracing diversity and ensuring that all individuals are treated fairly, regardless of race, religion, gender, or any other protected characteristic.

About the TeamAt OpenAI, our Applications Engineering organization is at the forefront of transforming groundbreaking research into user-friendly products that reach millions globally. The Applied Foundations team is pivotal, managing the essential product and platform layers that enable seamless user experiences—from identity and access management to safety, payments, and commerce across all our applications. Our diverse teams collaborate across product engineering, infrastructure, and safety, ensuring that we deliver technology that is not only reliable but also secure and trusted on a global scale.About the RoleAs a Senior Android Engineer on the Applied Foundations team, you will play a critical role in developing the core mobile experiences that facilitate user sign-up, account management, family features, service payments, and secure interactions with OpenAI’s suite of products. This position emphasizes the creation of high-quality products and reusable Android foundations that empower product teams across various OpenAI apps to expedite their delivery while adhering to the highest standards of security, reliability, and user trust. You will manage intricate client-side systems encompassing UI, networking, local state, payment integrations, and Apple platform integrations, collaborating closely with backend, product, and safety partners to architect a robust mobile ecosystem for OpenAI on a global scale.You may be an ideal candidate if you:Possess 4+ years of professional software engineering experience.Have a strong portfolio demonstrating high-quality Android applications in production.Are proficient in Kotlin (and/or Java) and are well-versed in Android development tools and architecture components.Prioritize performance, security, and user experience in your mobile development process.Enjoy cross-functional collaboration to bring innovative product ideas to fruition.Are passionate about enhancing performance, security, and overall user experience.

Join Our Innovative TeamAt OpenAI, we are on a mission to revolutionize mobile technology. Our team is responsible for developing a robust Kotlin-based platform that powers ChatGPT, Sora, and other rapidly advancing Android applications. Android is a crucial platform for ChatGPT, and we are dedicated to enabling teams to iterate swiftly while maintaining exceptional performance and reliability.About This PositionWe are seeking experienced Staff+ Android Engineers with diverse backgrounds in the Android ecosystem, particularly those specializing in performance optimization, continuous integration (CI), and enhancing AI developer productivity. Whether your expertise lies in UI frameworks, automated testing, or other areas, your contributions will lead to reduced friction, lower complexity, fewer regressions, and enhanced performance.If you are passionate about transforming Android development in the age of advanced AI tools, we want to hear from you.We are hiring in San Francisco, New York, and Seattle, with consideration for remote candidates.Your Responsibilities:Develop and enhance core Kotlin frameworks utilized across various applications and platforms (including caching, state management, observability, navigation, and component systems).Optimize application performance (startup time, responsiveness, memory usage, battery life) through profiling, monitoring, and architectural enhancements.Boost reliability by minimizing crashes, refining error handling, and improving the release process.Work closely with product engineering teams to understand and address pain points and emerging infrastructure requirements.Create internal tools and automation (CI, testing frameworks, Codex agent skills, etc.) to enhance engineering efficiency.Simplify real-world constraints into user-friendly abstractions: intuitive APIs, enforceable contracts, and safe defaults.You Will Excel If You:Possess strong expertise in Android development (Kotlin, modern architectural patterns, Jetpack).Thrive on tackling platform challenges: frameworks, architecture, performance, or developing tools that empower fellow engineers.Take initiative by identifying risks and opportunities, driving projects to completion, and adapting swiftly to changes.Value measurement: implement instrumentation, define metrics, conduct experiments, and iterate based on data.

Join Reddit's dynamic Brand Ad Formats team as an Android Software Engineer, where you'll be instrumental in shaping innovative ad experiences for millions of users. Your role will involve developing impactful ad formats, enhancing the performance of Reddit’s Android app, and collaborating with cross-functional teams to tackle complex challenges. We are seeking a product-focused engineer who is eager to push the boundaries of advertising technology and elevate user engagement through creativity and technical expertise.

Join our innovative team at Twitter Inc. as a Staff Android Engineer and be at the forefront of mobile technology development. In this dynamic role, you will leverage your expertise in Android development to create exceptional user experiences. We are looking for passionate individuals who thrive in a fast-paced environment and are ready to take on exciting challenges.

About UsAt XOXO AI, we are at the forefront of innovation, creating intelligent interfaces that enhance everyday life. Our team, comprised of dedicated engineers, designers, and researchers, is committed to solving unique challenges that extend beyond the workplace.With recent advancements in infrastructure, architecture, and machine learning models, we are expanding our team to include skilled builders who will help bring our vision to fruition through the development of our application layer.About the RoleWe are seeking a highly skilled Android engineer to spearhead the development of XOXO's consumer application, which features a revolutionary interface for intelligence. This position is tailored for a proactive engineer who will manage the entire mobile ecosystem, focusing on architecture, performance, refinement, and a visually captivating design system that ensures intentional user interactions.Your background is less important than your passion and drive: a commitment to high ownership, an ability to work swiftly without compromising quality, and a desire to create a mobile product that redefines excellence in craftsmanship and performance.What You’ll DoDesign and launch initial versions of our React Native application, advancing it from prototype to production.Convert a sophisticated visual design system into reusable components, animations, and interaction patterns, ensuring seamless performance.Develop new product interfaces that integrate cutting-edge AI/ML capabilities in a manner that feels intuitive on mobile devices.Enhance application performance across various dimensions: rendering, start-up speed, memory usage, battery consumption, networking, and user-perceived speed.Establish high standards for mobile engineering quality, including testing, instrumentation, and release management, collaborating closely across the tech stack to deliver end-to-end solutions.

Be Part of the E-Commerce Revolution with Whatnot!Whatnot is the premier live shopping platform in North America and Europe, dedicated to enabling users to buy, sell, and explore their passions. We’re transforming the landscape of e-commerce by merging community engagement with shopping and entertainment in a tailored environment. Our remote, co-located teams are driven by innovation and guided by our core values. With operational hubs across the US, UK, Germany, Ireland, and Poland, we are collectively shaping the future of online marketplaces.From fashion, beauty, electronics to collectible items like trading cards and comic books, our live auctions cater to a diverse audience.And we’re just beginning! As one of the fastest-growing marketplaces, we seek innovative, proactive problem solvers across all departments. Stay updated on our journey via our news and engineering blogs, and help us empower individuals to transform their passions into thriving businesses while fostering community through commerce. Your RoleWe are excited to welcome Android Engineers to our Growth teams, focusing on both Seller and Buyer Growth at Whatnot.The Seller Growth Engineering team is dedicated to helping sellers convert their hobbies into successful enterprises by building intuitive tools and systems for onboarding and scaling their businesses on the platform.Buyer Growth is essential for Whatnot’s top-of-funnel success, emphasizing user acquisition, activation, retention, and re-engagement. This team collaborates closely with Product, Data, Design, and Marketing to seamlessly integrate new users into our ecosystem and foster loyalty.As an Android Engineer on the Growth team, you will create and enhance mobile experiences that are foundational to both seller and buyer engagement, focusing on scalability and trust. Your contributions will directly influence how thousands of new users find, start, and thrive on Whatnot every week.Build high-quality Android features using Kotlin and Jetpack Compose that enhance seller onboarding, verification, and incentive processes.Work collaboratively with product, design, and backend teams to establish goals, define project scopes, and navigate technical challenges.Collaborate with data science teams to design and analyze experiments that inform product decisions.

Join our dynamic team at 360IT Professionals as a Senior Android Developer and play a crucial role in designing and developing cutting-edge mobile applications. We are looking for an innovative and experienced professional who is passionate about technology and eager to contribute to exciting projects that impact our clients and users.

Join Mindlance as a Senior IT Consultant and Android Developer, where you will leverage your expertise in mobile application development and IT solutions to drive innovation and excellence. You will be responsible for designing and implementing high-quality Android applications that meet the needs of our diverse clientele.Your role will involve collaborating with cross-functional teams, ensuring project milestones are met, and providing technical guidance to junior developers. If you are passionate about technology and eager to make a significant impact, we want to hear from you!