Senior Mobile Engineer - Core Infrastructure - Connectivity

Mission Statement The Platform team creates the technology that enables Spotify to learn quickly and scale easily, enabling rapid growth in our users and our business around the globe. Spanning many disciplines, we work to make the business work; creating the infrastructure, tooling, frameworks, and capabilities needed to welcome a billion customers. About the Team You’ll join the Connectivity squad within Spotify’s Core Infrastructure studio.

This team owns the client networking stack end-to-end, from HTTP requests to real-time messaging and connection state management. Working at the intersection of mobile platforms and backend systems, the squad plays a critical role in ensuring seamless connectivity for hundreds of millions of users globally. This is an opportunity to join early in the squad’s formation, working alongside a small group of senior engineers with high ownership and direct influence on technical direction.

You’ll collaborate closely with backend teams to shape client-server communication, protocols, and reliability at scale. What You'll Do Build and evolve the core systems that power client networking across Spotify’s mobile platforms Refactor and modularize existing components across C++, Android, and iOS, improving structure, ownership, and long-term scalability Improve integration layers to reduce coupling and simplify adoption across client applications Design and implement observability solutions, including metrics and telemetry, to support end-to-end debugging Lead migrations away from legacy networking systems, ensuring stability and minimizing risk during transitions Balance forward-looking development with maintaining reliability for hundreds of millions of active users Collaborate closely with engineers, product managers, and partner teams to align on priorities and delivery Contribute to long-term architectural decisions and help define best practices for mobile and client infrastructure Who You Are You have 5+ years of experience in mobile or infrastructure engineering, with strong expertise in C++ You are experienced working across Android and/or iOS environments and navigating large, multi-platform codebases You have built and shipped production-grade SDKs or mobile infrastructure components You have a deep understanding of networking fundamentals such as HTTP/2+, WebSockets, caching, retries, and resilience patterns You are familiar with real-time messaging systems such as PubSub or WebSocket-based architectures You are confident debugging, profiling, and optimizing performance across native and platform layers You have experience with CI/CD systems, build tooling, and modularization at scale You are comfortable working in a forming team environment with evolving scope and structure You communicate clearly and collaborate effectively across mobile, backend, and infrastructure teams Where You'll Be This role is based in 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.