Senior Engineer II, Activities Platform

ABOUT STRAVA Strava is the app for active people. With over 180 million athletes in more than 185 countries, it’s more than tracking workouts—it’s where people make progress together, from new habits to new personal bests. No matter your sport or how you track it, Strava’s got you covered. Find your crew, crush your goals, and make every effort count. Start your journey https://www.strava.com/subscription with Strava today. Our mission is simple: to motivate people to live their best active lives. We believe in the power of movement to connect and drive people forward. About This Role Strava is hiring a Senior Engineer to join the Activities Platform team within Core Services. This team is responsible for the underlying services that power activity uploads, data processing, media, and activity storage; they own the foundational data layer that nearly every feature at Strava is built on. The team partners closely with product development teams, enabling and discovering the capabilities that will be on the roadmap: either immediately or long into the future. We apply a product-forward mindset to complicated platform and infrastructure work. Together we create the most reliable and performant ways for athletes to interact with their data — then inform what comes next. We follow a flexible hybrid model that translates to more than half of your time on-site in our San Francisco office — three days per week. WHAT YOU’LL DO: - Own and evolve the systems that power activity data at Strava — from upload ingestion through processing, storage, and serving - Design and build backend services that handle millions of activity uploads and the data pipelines that flow from them - Operate and improve critical production infrastructure, including participation in a 24/7 on-call rotation - Partner with product teams across Strava to scope and deliver platform capabilities that unblock their roadmaps - Contribute to technical design reviews, write and review design docs, and help set technical direction for the team - Split your time roughly 50/50 between proactive platform investment and direct product-team support, adapting as priorities shift WHAT YOU’LL BRING TO THE TEAM: - You have 4+ years of professional software development experience or equivalent wisdom - A track record of writing software that runs well in production. You think about monitoring, rollout strategy, and operational health as part of your development process, not an afterthought - Significant backend/server engineering experience: you've built and operated services in production, not just designed them - Experience with distributed systems and the trade-offs involved in scaling them - Hands-on experience with data stores such as SQL or column stores. You understand what to use for data storage and why - Proficiency in at least one of Strava's backend languages (Ruby, Scala, Go, Java) with comfort picking up others. - Experience with distributed systems technologies like Kafka, Kubernetes, Docker, and cloud infrastructure (AWS). - Ability to break down ambiguous problems, drive projects through to delivery, and communicate clearly with engineers and cross-functional partners WHY JOIN US? Movement brings us together. At Strava, we’re building the world’s largest community of active people, helping them stay motivated and achieve their goals. Our global team is passionate about making movement fun, meaningful, and accessible to everyone. Whether you’re shaping the technology, growing our community, or driving innovation, your work at Strava makes an impact. When you join Strava, you’re not just joining a company—you’re joining a movement. If you’re ready to bring your energy, ideas, and drive, let’s build something incredible together. Strava builds software that makes the best part of our athletes’ days even better. Just as we’re deeply committed to unlocking their potential, we’re dedicated to providing a world-class, inclusive workplace where our employees can grow and thr