Spotify
From Spotify's careers page
Status: listed on the employer's own careers page when we last checked (daily). Confirm on their site before applying.
We’re looking for a Senior C++/iOS Engineer to join the Baldur squad within User Platform (UP).
We’re looking for a Senior C++/iOS Engineer to join the Baldur squad within User Platform (UP). Baldur owns Spotify’s Session Management and Delegated Authorization domains—the systems that enable applications to securely obtain, use, and manage access tokens for hundreds of millions of users. In this role, you’ll help shape the technology that powers secure access across every Spotify client and third-party integration. Your work will support engineers across Spotify building mobile and desktop experiences, platform teams, and third-party developers integrating with Spotify’s authorization platform. You’ll collaborate across disciplines to build secure, reliable, and scalable authentication experiences that have a direct impact on millions of people every day.
Collaborate with a highly autonomous and supportive engineering squad responsible for Spotify’s delegated authorization and session management platforms.
Design, build, and evolve critical infrastructure powering Spotify applications and partner integrations using shared C++ libraries and native Swift on iOS.
Develop secure, reliable, and performant delegated authorization flows, including token issuance, refresh, revocation, and session lifecycle management across multiple platforms.
Partner with client and backend engineers to integrate with core authorization services, token issuance, client registration, and token revocation.
Improve how credentials and access tokens are securely stored and managed on-device while balancing security, reliability, and application performance.
Contribute to the evolution of Spotify’s authorization frameworks, Spotify-specific implementations, enabling new platforms and product experiences.
You have experience designing, building, or maintaining security-sensitive systems such as authorization, authentication, token management, credential storage, or related platforms.
You bring a systems-thinking mindset and enjoy solving complex engineering challenges that span client and backend technologies.
You have a solid understanding of software architecture, secure system design, and modern authorization protocols such as OAuth 2.0.
You approach problems thoughtfully, with strong attention to detail and a focus on building secure, reliable, and maintainable solutions.
You communicate clearly and enjoy collaborating with engineers across multiple teams and technical disciplines.
You have experience working with shared cross-platform codebases and understand how native platform layers interact with common C++ libraries.
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.
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