{"id":118092,"url":"https://alion.io/job/spotify-senior-cios-engineer-user-platform","title":"Senior C++/iOS Engineer - User Platform","company":{"id":57,"name":"Spotify","domain":"spotify.com","url":"https://alion.io/company/spotify","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":86,"open_postings":14,"ghost_share":0,"stale_share":0.5,"repost_share":0.071,"time_to_fill_p50_days":51,"computed_at":"2026-10-28T05:59:10Z"}},"role":"Mobile","role_family":"Mobile","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Stockholm, Sweden","London, United Kingdom"],"countries":["SE","GB"],"hiring_countries":["SE"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"Swift","optional":false}],"status":"live","first_seen_at":"2026-07-06T11:59:02Z","employer_posted_date":"2026-07-06","last_verified_at":"2026-10-28T16:06:04Z","board_verified":true,"closed_at":null,"days_open":114,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":114},"description":"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.\nYour 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.\nWhat You'll Do\nCollaborate with a highly autonomous and supportive engineering squad responsible for Spotify’s delegated authorization and session management platforms.\nDesign, build, and evolve critical infrastructure powering Spotify applications and partner integrations using shared C++ libraries and native Swift on iOS.\nDevelop secure, reliable, and performant delegated authorization flows, including token issuance, refresh, revocation, and session lifecycle management across multiple platforms.\nPartner with client and backend engineers to integrate with core authorization services, token issuance, client registration, and token revocation.\nImprove how credentials and access tokens are securely stored and managed on-device while balancing security, reliability, and application performance.\nContribute to the evolution of Spotify’s authorization frameworks, Spotify-specific implementations, enabling new platforms and product experiences.\nDrive technical improvements, share knowledge with teammates, and help shape the long-term technical direction of delegated authorization and session management.\nWho You Are\nYou have strong proficiency in C++, along with experience building native iOS applications in Swift, or you're excited to develop your expertise in Swift while applying your C++ skills.\nYou have experience designing, building, or maintaining security-sensitive systems such as authorization, authentication, token management, credential storage, or related platforms.\nYou bring a systems-thinking mindset and enjoy solving complex engineering challenges that span client and backend technologies.\nYou have a solid understanding of software architecture, secure system design, and modern authorization protocols such as OAuth 2.0.\nYou approach problems thoughtfully, with strong attention to detail and a focus on building secure, reliable, and maintainable solutions.\nYou communicate clearly and enjoy collaborating with engineers across multiple teams and technical disciplines.\nYou have experience working with shared cross-platform codebases and understand how native platform layers interact with common C++ libraries.\nYou enjoy working on large-scale distributed systems where your contributions improve experiences for hundreds of millions of Spotify users.\nWhere You'll Be\nThis role is based in London or Stockholm.\nWe 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.","description_format":"text","description_chars":3271,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"Sweden","iso":"SE","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Advertising","Music Industry","Podcasting","Streaming & OTT Platforms"],"lifecycle":[{"event":"open","at":"2026-07-06T11:59:02Z"}],"visa":[],"liveness":{"score":11,"band":"cold","label":"Long shot","p_open":1,"p_active":0.396,"p_room":0.28,"age_days":113,"expected_fill_days":51,"reasons":["conf:3","stale_co","velocity","win:tail","crowd:"],"computed_at":"2026-10-28T05:59:10Z"},"pay":null,"html_url":"https://alion.io/job/spotify-senior-cios-engineer-user-platform","json_url":"https://alion.io/job/spotify-senior-cios-engineer-user-platform.json","meta":{"generated_at":"2026-10-28T17:39:35Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":24074,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-29T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":57},"rest":"https://alion.io/mcp/rest/get_company?id=57"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fspotify-senior-cios-engineer-user-platform"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fspotify-senior-cios-engineer-user-platform"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fspotify-senior-cios-engineer-user-platform"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/spotify-senior-cios-engineer-user-platform\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fspotify-senior-cios-engineer-user-platform"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":118092}},{"tool":"search_jobs","arguments":{"company":"spotify.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":118092},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}