Senior C++/iOS Engineer – Secure Auth Platform

Spotify AB; Stockholms kommun; Hybrid; SEK 1,164,596 - 1,940,994; Full time

Job summary

Spotify AB is seeking a Senior C++/iOS Engineer to join the Baldur squad within User Platform (UP). You’ll help shape secure, scalable authentication and session management across iOS and cross‑platform clients, collaborating with partner teams to enable trusted access for hundreds of millions of users.

Based in London or Stockholm, this role offers hybrid work with occasional in‑person sessions. You’ll influence architecture, drive security best practices, and mentor engineers while delivering

Qualifications

• Proficient in C++ with experience in building native iOS apps using Swift.
• Experience designing and maintaining security‑sensitive systems such as authorization and token management.
• Strong systems thinking and ability to work across client and backend boundaries.

Responsibilities

• Collaborate with autonomous squads owning delegated authorization and session management platforms.
• Design, build, and evolve infrastructure powering applications and partner integrations using shared C++ and Swift on iOS.
• Develop secure, reliable delegated authorization flows including token issuance, refresh, revocation, and session lifecycle management.

Skills

C++

Swift (iOS)

Security/Authorization

OAuth 2.0

Distributed systems

Cross-functional collaboration

Job description

Spotify AB is seeking a Senior C++/iOS Engineer to join the Baldur squad within User Platform (UP). You’ll help shape secure, scalable authentication and session management across iOS and cross‑platform clients, collaborating with partner teams to enable trusted access for hundreds of millions of users.

Based in London or Stockholm, this role offers hybrid work with occasional in‑person sessions. You’ll influence architecture, drive security best practices, and mentor engineers while delivering