{"id":1977,"url":"https://alion.io/job/xai-mobile-ios-engineer","title":"Mobile iOS Engineer","company":{"id":28,"name":"xAI","domain":"x.ai","url":"https://alion.io/company/xai","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":88,"open_postings":100,"ghost_share":0,"stale_share":0.47,"repost_share":0,"time_to_fill_p50_days":59,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Mobile","role_family":"Mobile","seniority":null,"employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":262000,"max":null,"currency":"GBP","period":"year","gross":null,"usd_annual":346277},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Combine","optional":false},{"name":"gRPC","optional":false},{"name":"Reactive Programming","optional":false},{"name":"Rest API","optional":false},{"name":"Swift","optional":false},{"name":"SwiftUI","optional":false},{"name":"UIKit","optional":false},{"name":"AVFoundation","optional":true},{"name":"Rust","optional":true}],"status":"live","first_seen_at":"2026-02-19T18:27:59Z","employer_posted_date":"2026-09-30","last_verified_at":"2026-10-16T19:57:20Z","board_verified":true,"closed_at":null,"days_open":239,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":238},"description":"SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today, SpaceX is actively developing the technologies to make this possible, with the ultimate goal of making life multiplanetary and expanding consciousness to the stars. \nSpaceXSI is building Super Intelligence to understand the universe and help expand humanity’s knowledge and capabilities. We work across the full Super Intelligence stack: compute (Colossus supercomputers), models (Grok), and applications (Grok Bot, Grok Build, Grok Imagine, Grok Voice, and X). We're creating a powerful flywheel where more compute trains better models, better models power more useful products, and what we learn from people using those products shapes what we build next.\nABOUT THE ROLE:\nWe’re seeking an exceptional iOS engineer to join a small, high-impact team dedicated to creating the world’s most valuable AI application, judged by the impact it delivers to users. You’ll shape cutting-edge mobile experiences, blending technical mastery with product brilliance. \nRESPONSIBILITIES:\nDream up and craft delightful, intuitive user experiences that redefine how people interact with AI on mobile.\nObsess over every pixel, animation, and interaction, ensuring the experience feels magical and seamless.\nBuild blazing-fast, highly performant systems where every millisecond counts.\nDrive technical and product decisions, collaborating with AI researchers and engineers to deploy state-of-the-art models globally.\nBASIC QUALIFICATIONS:\nExpert in Swift, with deep knowledge of SwiftUI and UIKit.\nProficient in performance optimization-memory, CPU, GPU-using low-level tools to deliver blazing-fast systems.\nExperienced in designing and shipping intuitive, pixel-perfect mobile UIs that redefine how users interact with AI.\nSkilled in concurrency and reactive programming (Combine) for responsive, real-time apps.\nBuilt high-throughput integrations with APIs (REST, gRPC) or AI model outputs, ensuring seamless data flow.\nCapable of owning complex features end-to-end, from architecture to App Store deployment, with a focus on speed and scalability.\nPREFERRED SKILLS AND EXPERIENCE:\nDeep expertise in the Apple ecosystem and related development tools.\nRust for working with our backend components.\nAVFoundation for real-time audio processing.\nTrack record of shipping standout apps or standout features within apps.\nDeep expertise in iOS development, particularly with Swift. We seek individuals who operate at the highest levels of their craft.\nExcel at delivering results swiftly, often in a fraction of the time others require. Speed is a core value at SpaceXAI-we must act decisively to succeed.\nSharp product sense, with an ability to empathize with users, anticipate their needs, and translate that into features that delight and deliver value.\nCOMPENSATION AND BENEFITS:\n£107,000 - £262,000 GBP\nBase salary is just one part of our total rewards package at SpaceXAI, which also includes equity, comprehensive healthcare and dental coverage, cash plan, income protection, life insurance, and various other discounts and perks.\nSpaceXAI is an equal opportunity employer. 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