Senior Mobile Engineer - Core Infrastructure - Connectivity

Requirements

• 5+ years of experience in mobile or infrastructure engineering, with strong expertise in C++
• Experienced working across Android and/or iOS environments and navigating large, multi-platform codebases
• Built and shipped production-grade SDKs or mobile infrastructure components
• Deep understanding of networking fundamentals such as HTTP/2+, WebSockets, caching, retries, and resilience patterns
• Familiarity with real-time messaging systems such as PubSub or WebSocket-based architectures
• Confident in debugging, profiling, and optimizing performance across native and platform layers
• Experience with CI/CD systems, build tooling, and modularization at scale
• Comfortable working in a forming team environment with evolving scope and structure
• Effective communication and collaboration skills across mobile, backend, and infrastructure teams

What You'll Be Doing

• 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

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