We design Spotify’s consumer experience—end to end, moment to moment, across every screen, platform, and partner integration. Our mission is to make listening feel effortless, personal, and joyful for billions of users around the world. That means turning complexity into clarity across hundreds of touchpoints—from our mobile and desktop apps to the smart speakers, TVs, cars, and integrations where Spotify shows up every day. If it touches a consumer, we shape it. We bring deep insight into human behavior, design, and technology to craft experiences that feel intuitive, expressive, and unmistakably Spotify. Formats & Foundations is part of Spotify’s Core Experience Studio, focused on helping users connect more deeply with creators and their content. The team owns and evolves some of Spotify’s most highly trafficked experiences, including Artist, Album, Podcast, Episode, and Audiobook surfaces. Beyond building user-facing experiences, the team develops foundational mobile capabilities, reusable components, and platform infrastructure that enable teams across Spotify to deliver high-quality, consistent experiences at scale. We work at the intersection of product experience and platform engineering, balancing innovation, performance, and usability across the Spotify app. We’re looking for a Senior Client Engineer who is passionate about mobile craftsmanship, scalable architecture, and building tools and foundations that empower product teams. You’ll help shape technical direction, mentor engineers, and contribute to experiences used by millions of listeners every day. WHAT YOU’LL DO * Design, build, and evolve mobile experiences across some of Spotify’s most visible consumer surfaces. * Contribute to the architecture and development of reusable mobile foundations, frameworks, and platform capabilities. * Lead technical initiatives that improve scalability, performance, reliability, and developer experience across the Spotify app. * Collaborate closely with engineers, product managers, designers, and platform teams to shape product direction and technical strategy. * Drive engineering quality through thoughtful code reviews, testing practices, observability, and operational excellence. * Mentor engineers and contribute to a collaborative, inclusive, and growth-oriented engineering culture. * Help teams across Spotify move faster by improving tooling, workflows, documentation, and shared engineering standards. * Participate in experimentation and prototyping efforts tied to future-facing content and listening experiences. * Explore modern engineering workflows, including AI-assisted development tools and emerging mobile technologies. * Balance short-term product needs with long-term platform sustainability and technical health. WHO YOU ARE You have strong experience building mobile applications using Swift and Kotlin. You have experience contributing to large-scale consumer-facing applications with high performance and reliability expectations. You know how to design scalable, maintainable mobile systems and reusable platform components. You care deeply about user experience, accessibility, performance, and engineering craftsmanship. You are experienced collaborating across disciplines and influencing technical decisions in cross-functional environments. You communicate technical ideas clearly and thoughtfully with both technical and non-technical audiences. You enjoy mentoring and supporting engineers through collaboration, feedback, and knowledge sharing. You are comfortable navigating ambiguity and making thoughtful technical trade-offs. You are curious about emerging technologies and evolving development practices, including AI-assisted engineering workflows. You bring a growth mindset and continuously look for opportunities to improve systems, products, and team practices. WHERE YOU’LL BE * This role is based in Stockholm or London. * We offer you the flexibility to work where you work best! There will be some in person meetings, but still allows for flexibility to work from home. Spotify is an equal opportunity employer. You are welcome at Spotify for who you are, no matter where you come from, what you look like, or what’s playing in your headphones. Our platform is for everyone, and so is our workplace. The more voices we have represented and amplified in our business, the more we will all thrive, contribute, and be forward-thinking! So bring us your personal experience, your perspectives, and your background. It’s in our differences that we will find the power to keep revolutionizing the way the world listens.   At Spotify, we are passionate about inclusivity and making sure our entire recruitment process is accessible to everyone. We have ways to request reasonable accommodations during the interview process and help assist in what you need. If you need accommodations at any stage of the application or interview process, please let us know - we’re here to support you in any way we can.