{"id":3961293,"url":"https://alion.io/job/supercell-senior-ai-engineer-engine-reliability","title":"Senior AI Engineer, Engine Reliability","company":{"id":52311,"name":"Supercell","domain":"supercell.com","url":"https://alion.io/company/supercell","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":91,"open_postings":7,"ghost_share":0,"stale_share":0.143,"repost_share":0,"time_to_fill_p50_days":95,"computed_at":"2026-11-09T06:03:00Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Helsinki, Finland","London, United Kingdom"],"countries":["FI","GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Function Calling","optional":false},{"name":"LLM","optional":false},{"name":"LLM Guardrails","optional":false},{"name":"C++","optional":true},{"name":"Fine-tuning","optional":true},{"name":"Google Test","optional":true},{"name":"Knowledge Distillation","optional":true},{"name":"Model Distillation","optional":true},{"name":"Sentry","optional":true},{"name":"Windows","optional":true}],"status":"live","first_seen_at":"2026-11-09T07:11:20Z","employer_posted_date":"2026-11-09","last_verified_at":"2026-11-09T11:53:56Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Our engine, Titan, powers some of the highest-grossing games in mobile - titles that have generated billions in revenue and reach hundreds of millions of players.\nWe are investing heavily in the future of Titan, and as part of that investment, we're building a brand-new Reliability team: an autonomous, high-skill group that will work closely with our engine and game teams, empowering them to work safer, faster, and easier through better infrastructure, AI-driven engineering capabilities, and feedback loops.\nAI is fundamentally changing how software is built, and we believe it will transform how games are made at Supercell. As AI agents take on more of the development process, the challenge isn't simply moving faster - it's building the confidence to do so. We're creating an AI-native Reliability team to help make that future possible, rethinking how we develop, validate, debug, and understand the impact of changes across real games. Our ambition goes far beyond better testing and automation: we're building the foundations for a world where engineers and AI agents can experiment, develop, and ship with a level of speed and confidence that simply isn't possible today.\nA big part of how we work is through deep partnerships with our game teams. We don't want to build technology in isolation and hand it over for others to adopt. We work alongside the teams building and operating our games, understanding their challenges firsthand, experimenting together, and developing solutions that genuinely change how they work. We want to build capabilities that scale across Supercell while giving individual game teams the freedom to adapt and extend them to their own needs.\nThis role sits at the intersection of applied AI, game development, and engine programming. The challenge is the distance between a demo and a system that engineers trust: the evals that tell you it's actually working, the cost and latency that make it viable, and the failure modes you find before anyone else does. We're not looking for someone who wants to train a frontier model. We're looking for someone who gets unreasonable results out of the ones that exist, and knows how to turn emerging AI capabilities into real engineering value.\nDid you know we have our own game engine?This article explains why you've probably never heard of Titan, whilethis more technical article is about making Brawl Stars toilet break-friendly.\nWhat You'll Be Doing\nDesign, build, and ship AI-native engineering capabilities that change how our engine and game teams develop, integrate, validate, and deliver software.\n\nWork directly with game teams, sometimes embedding with them, to understand their workflows, identify opportunities, prototype solutions, and take them all the way into real-world use.\n\nBuild agentic systems that can take on increasingly complex engineering work, from understanding code changes and investigating failures to generating solutions, validating their behaviour, and providing actionable feedback.\n\nOwn evaluation as a first-class engineering discipline. Build the evals and feedback loops that tell us whether our AI-driven systems are actually delivering reliable, useful results.\n\nMake autonomous agents reliable enough to trust with real work, with the right guardrails, human checkpoints, and observability.\n\nBuild and evolve the underlying reliability infrastructure that makes AI-driven development possible, including integration validation, automated testing, and realistic environments across real devices and services.\n\nThink beyond individual tools. Help shape reusable capabilities that work across games while allowing teams to build and adapt their own solutions.\n\nUse judgment on where AI adds leverage, where deterministic approaches win, and where emerging technologies could fundamentally change how we work.\n\nHelp set the practices of a new team as it grows, and raise the technical bar through code review, pairing, and design discussion.\n\nWhat You Have\nA track record of shipping LLM or agentic applications that real users used in production, not just prototypes.\n\nStrong, current command of modern generative methods at the applied level: you know what today's models are good at, where they break, and how to build reliably on top of them.\n\nHands-on experience building agent workflows and tool use, and making them dependable through evals, guardrails, and observability.\n\nReal software engineering depth. You write code others can maintain, and you own things in production.\n\nStrong product and engineering instincts, with the ability to understand a team's problems, challenge assumptions, and turn emerging technology into practical solutions.\n\nExperience with build systems, CI pipelines, scripting, and developer tooling.\n\nStrong collaboration skills and comfort working closely with other engineering teams, navigating ambiguity, and driving work from early exploration through to adoption without adding unnecessary process overhead.\n\nWould Be Nice if You Also Have\nGames industry experience, and a real appreciation for mobile.\n\nGame engine or runtime development experience, and credibility with engine engineers.\n\nProfessional experience with C++, enough to read and debug engine and runtime code.\n\nExperience with fine-tuning, model adaptation, or distillation, and the judgment to know when not to reach for it.\n\nExperience debugging cross-platform issues on iOS, Android, macOS, or Windows.\n\nExperience with device automation, device farms, or test frameworks such as Catch2 or gTest.\n\nExperience with observability tools such as Sentry, logs, metrics, or tracing, including applying AI to crash and log analysis.\n\nExperience improving testability or reliability in shared engine or platform code.\n\nWhere You'll Be\nYou can be based either in Helsinki or London.\n---\nThat's it about the role! Below, we've gathered some things we feel are important for you to know. Totally optional, but a highly recommended read. \nOnce you're ready to apply, just send us your application through the form on the bottom of the page. \n---\nAbout Supercell\nSupercell is a games company from Helsinki, Finland, with offices also in San Francisco, Seoul, Shanghai, and London. You might know us as the makers of Hay Day, Clash of Clans, Boom Beach, Clash Royale, and Brawl Stars. Our mission is to create great games that as many people as possible play for years and that are remembered forever.\nSo, how do we make great games? By putting together the best teams and giving them the freedom and independence to succeed. And by taking risks, failing, sharing learnings, and killing lots of projects.\nHey, You Might Love It Here!\nIndependent cells and trust are at the core of our culture. But it takes more than that to make great games. We take good care of our people, providing them with the compensation, work environment, and resources they need to succeed while having fun along the way.\nYou Are Not Your Job Title ™\nHere, you won’t need to focus on chasing titles or climbing ladders. Internally, our job titles don’t include prefixes like Senior, Junior, Principal, or Director. Recognition isn’t tied to your title, as it doesn't define the impact you can have around here.\nBenefits and Compensation\nLuring you in with glitter, glamour, and gems isn't what we're about. We want you to enjoy your time here fully, so we structure our compensation and benefits with that in mind. It starts with perceiving you as a human being, not a resource.\nRelocation? Yes!\nNo matter where you’re moving from, our dedicated mobility team and partners will support you throughout your move. We’ll ensure the process is as smooth as possible for you and anyone joining you - whether they’re family members of the human or animal kind!\nNot Sure if You Should Apply?\nMany candidates with great skills and experience second-guess themselves. The bar is high, but if this role excites you, apply! We’re here to help you succeed. Also, we're happy to learn about any specific accommodations you may need to fully engage in our recruitment process.\nWishing you all the best,\nThe Supercell Recruitment team","description_format":"text","description_chars":8116,"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":[],"hiring_excludes":[],"relocation_offered":true,"industries":["Mobile Games","Game Development"],"lifecycle":[{"event":"open","at":"2026-11-09T11:53:56Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":95,"reasons":["conf:1","win:early"],"computed_at":"2026-11-09T13:22:14Z"},"pay":null,"html_url":"https://alion.io/job/supercell-senior-ai-engineer-engine-reliability","json_url":"https://alion.io/job/supercell-senior-ai-engineer-engine-reliability.json","meta":{"generated_at":"2026-11-09T13:22:14Z","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":17474,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-10T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":52311},"rest":"https://alion.io/mcp/rest/get_company?id=52311"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsupercell-senior-ai-engineer-engine-reliability"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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%2Fsupercell-senior-ai-engineer-engine-reliability"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fsupercell-senior-ai-engineer-engine-reliability"},{"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/supercell-senior-ai-engineer-engine-reliability\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsupercell-senior-ai-engineer-engine-reliability"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3961293}},{"tool":"search_jobs","arguments":{"company":"supercell.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3961293},"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. 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