Android Software Engineer, Ad Formats

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.

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 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.

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.

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.

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.

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 Resolve AIAt Resolve AI, we are pioneering solutions that alleviate the burdens of software maintenance and production troubleshooting, allowing engineers to focus on innovation. Our mission is to develop a cutting-edge, fully autonomous AI Production Engineer capable of diagnosing and resolving intricate system issues from start to finish.Founded by industry leaders Spiros Xanthos and Mayank Agarwal, who were instrumental in creating OpenTelemetry and have led initiatives at Splunk Observability, our team has successfully exited to major players like Splunk and VMware.With over $150 million raised from prominent investors such as Lightspeed, Greylock, and Unusual Ventures, alongside renowned backers like Jeff Dean (Chief Scientist, Google DeepMind) and Fei-Fei Li (Professor, Stanford), we are well-positioned for growth and innovation.Your RoleYou will take complete ownership of our marketing website, ensuring excellence in code quality, performance, reliability, and user experience.Your expertise will be pivotal in converting UI/UX designs into responsive, accessible, and high-performing web pages.Collaborate closely with our marketing and design teams to create compelling landing pages and insightful content.Develop tailored web experiences for Account-Based Marketing (ABM) campaigns.Drive significant growth through the optimization of pages for conversion, SEO, and overall performance.Implement and manage analytics tools (e.g., Segment, Google Analytics) to monitor and analyze user behavior effectively.Conduct A/B testing to validate hypotheses and enhance website experiences iteratively.Oversee CI/CD pipelines, deployment environments, and site reliability using platforms like Vercel or Netlify.Proactively monitor site traffic and engagement metrics, providing insights and recommendations for improvements.Ensure adherence to best practices in SEO, mobile responsiveness, accessibility, and security.QualificationsA minimum of 5 years of experience in managing and scaling modern marketing websites.Proficient in HTML5, CSS3, JavaScript/TypeScript, with a strong command of Next.js.Hands-on experience in analytics instrumentation and leveraging tools like Segment and Google Analytics.Adept at managing CI/CD processes and deployment environments.Strong problem-solving skills and the ability to work collaboratively in a fast-paced environment.

At Composio, we are pioneering the infrastructure that enables seamless communication between agents and the essential tools you rely on for work, such as GitHub, Gmail, Notion, and Salesforce. As a compact team of dedicated engineers, we tackle challenges ranging from context to search, striving to create the most effective bridge between your agents and your tools.We recently secured a $25 million Series A funding from Lightspeed, backed by notable angels like Guillermo Rauch (CEO of Vercel), Dharmesh Shah (CTO of HubSpot), and Gokul Rajaram. Earlier this year, we tripled our ARR, with clients spanning from your friends in the YC batch to Wabi, Glean, Zoom, and many others.What You'll Do- Develop sharp, focused products and experiments aimed at boosting awareness, activation, and adoption — often within a single day.- Optimize opportunities: define aggressively, deliver swiftly, and let actual usage data inform further investment decisions.- Implement comprehensive tracking, analyze data, and allow insights (rather than intuition) to direct future developments.- Take full ownership of growth initiatives from conception to design, frontend development, deployment, and performance measurement.

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.

Reddit hosts a massive community platform, bringing together over 100,000 active communities and reaching about 121 million unique daily visitors. The company’s Android Platform team leads the technical direction for Reddit’s Android app, shaping its architecture and ensuring a reliable experience for millions of users. Role overview This Staff Android Engineer (Client Platform) position centers on technical leadership within Reddit’s Android organization. The work focuses on client health (crashes, ANRs, performance), developer experience, and app architecture. The role supports both the core app and the frameworks and tools that enable other teams to build and ship features efficiently. What you will do Design and architect the future of Reddit’s Android app, supporting over 100 million daily active users. Build tools, workflows, and CI integrations to improve the Android developer experience and streamline deployment. Establish and enforce guardrails, such as lint/static analysis, tests, and AI-assisted code reviews, to catch issues early. Develop frameworks for client health and observability, including events, traces, and dashboards. Integrate AI strategies into engineering workflows to increase productivity. Mentor and support Android engineers through design reviews, documentation, and sharing platform knowledge. Requirements Minimum 8 years of professional software engineering experience, with a strong background in Android development. Location San Francisco, CA Learn more about Reddit at www.redditinc.com.

Why Join Flux?At Flux, we are pioneering the future of hardware with our groundbreaking AI Hardware Engineer. Our mission is to make cutting-edge hardware accessible to everyone and transform the way electronics are conceived and constructed globally.Your RoleThis is a unique chance for a technical innovator eager to take charge of growth from start to finish. You will collaborate closely with product, design, and marketing teams, focusing on designing and implementing experiments that boost user acquisition, activation, and retention. Imagine creating new onboarding processes, refining user funnels, assembling quick solutions, or conducting experiments that yield significant results in weeks rather than months.Key ResponsibilitiesDesign & Launch Growth Experiments: Develop and implement tools, landing pages, onboarding processes, and conversion strategies.Analyze User Challenges: Leverage data, user insights, and intuition to pinpoint where technical users disengage and devise strategies to enhance their experience.Enhance Onboarding & Activation: Revamp initial user interactions so they reach their “aha” moments more swiftly — all while minimizing the need for manual support.Engage in Cross-Functional Collaboration: Work alongside marketing for campaigns, product teams for user flows, and engineering on integrations or growth functionalities.Measure Outcomes: Set up tracking mechanisms, evaluate experiment success, and prioritize tasks based on data and potential impact.Stay Resourceful: Employ any necessary tools, frameworks, or hacks to accomplish tasks quickly — from coding to automating processes to adjusting website structures.What You Bring to the TableSolid technical skills: proficient in coding, prototyping, and tool integration (a background in front-end or full-stack is a plus).Demonstrated success in executing growth experiments that deliver measurable outcomes.Empathy towards technical users (engineers, designers, etc.). Ability to deeply grasp their workflows and motivations.Analytical mindset: passion for data, funnel analysis, and experimentation methodologies.Entrepreneurial spirit: proactive, capable of hustling, iterating, and solving problems rapidly.Strong communication skills to articulate ideas clearly.

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.

athena-hq is looking for a Growth Engineer to join the team in San Francisco. This position is in-person and focuses on building and improving solutions that drive user growth and enhance the product. What you will do Develop and launch technical projects that contribute to company growth Use data analytics to spot opportunities and track the results of your work Collaborate with product and engineering teams to make the user experience better Test new tools and methods to refine growth strategies Location This role is based in San Francisco and requires working onsite.

AllTrails brings together millions of outdoor enthusiasts, offering an extensive library of trails and resources to support outdoor adventures. The platform aims to make nature accessible to everyone and encourages responsible enjoyment of the outdoors. Role overview The Android Engineer position at AllTrails is fully remote within the United States. While applicants from across the country are welcome, there is a preference for those based near San Francisco CA, Portland OR, Seattle WA, Denver CO, or New York NY. Living near these cities can make it easier to participate in Trail Days, collaborative meetings, and community events, though remote work remains the standard. Employees located in San Francisco are invited to visit the office once a week for in-person collaboration. This role combines the flexibility of remote work with opportunities to connect with colleagues and the broader AllTrails community.

Join Our Dynamic Growth TeamAt Exa, we are on a mission to revolutionize the search engine landscape. Our growth team is pivotal in driving user engagement and revenue across our innovative consumer and enterprise API products. Following our successful Series B funding round with Benchmark, we are rapidly expanding our capabilities and are looking for a passionate Growth Engineer to help elevate our brand visibility and user adoption.Your RoleAs a Growth Engineer, you will leverage your extensive knowledge in performance marketing strategies and analytical tools to collaborate with cross-functional teams including leadership, engineering, and marketing. Your goal will be to create and implement impactful marketing campaigns that drive measurable results across diverse channels.Key ResponsibilitiesCreate and manage paid user acquisition campaigns through various scalable channels such as search engines, social media, email, and influencer partnerships to enhance user growth.Conduct experiments and A/B testing, utilizing data analysis to extract insights and identify opportunities for conversion rate optimization.Develop and implement AI-driven workflows to enhance outreach to potential users and engage our existing user base more effectively.Oversee the management and creative direction of partnerships with content creators to broaden our marketing reach.Ideal Candidate ProfileA minimum of 3 years’ experience in growth or performance marketing within fast-paced tech environments.Demonstrated success in launching, scaling, and optimizing various paid marketing channels.Familiarity with AI-driven marketing tools, creative operations engineering, and automation platforms such as N8N, Gumloop, and Zapier.We pride ourselves on providing our employees with comprehensive healthcare benefits, including medical, dental, and vision coverage, along with fertility benefits and a monthly wellness stipend.

About UsOur mission is to revolutionize language learning.Learning a new language can be transformative, unlocking opportunities to explore diverse cultures, career paths, and communities. With two billion people worldwide striving to learn a language, the most effective method—personalized one-on-one tutoring—remains difficult to access at scale and has seen little innovation for decades. Speak is pioneering an AI-driven tutor that fits in your pocket, offering a conversation-first approach that enables learners to engage in dialogue, receive immediate feedback, and progress through thoughtfully crafted lessons. This leads to a comprehensive journey from novice to confident speaker across numerous languages.Since our launch in South Korea in 2019, Speak has emerged as the leading language learning app, expanding our reach to learners across various markets and 15+ languages. As one of the foremost AI companies globally, we have secured over $150 million in venture funding from prominent investors including OpenAI, Accel, Founders Fund, and Khosla Ventures, with a diverse team distributed across San Francisco, Seoul, Tokyo, Taipei, and Ljubljana.About This RoleAs an Android Engineer on Speak’s engineering team, you will play a pivotal role in enhancing our content delivery, conducting A/B tests on monetization strategies, and supporting the launch of new markets and languages. You will collaborate closely with backend engineers and our Product and Design partners, delivering product features to millions of users.Your ResponsibilitiesDevelop growth mechanisms, including referral systems and in-app sharing features.Enhance new user acquisition and retention strategies.Work on pricing and packaging strategies.Assist in launching new markets and languages.Refine our text-to-speech capabilities.Improve our audio and video streaming systems.QualificationsA minimum of 3 years of industry experience as a Mobile Engineer, ideally in a dynamic startup environment.Bonus: Experience working on an app that has reached 1 million users.Strong proficiency in Kotlin, with an in-depth understanding of mobile architectures such as MVC/MVVM.Bonus: Experience with Jetpack Compose.Bonus: Familiarity with mobile streaming technologies.