{"id":887772,"url":"https://alion.io/job/mubit-founding-engineer","title":"Founding Engineer","company":{"id":684066,"name":"Mubit","domain":"mubit.ai","url":"https://alion.io/company/mubit","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":null},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"hybrid","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":null,"salary_estimate":{"min_usd":78000,"max_usd":187000,"period":"year","method":"role_country_seniority_unknown","sample_n":270},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"AutoGen","optional":false},{"name":"CrewAI","optional":false},{"name":"LangGraph","optional":false},{"name":"LangChain","optional":true}],"status":"live","first_seen_at":"2026-04-01T15:55:03Z","employer_posted_date":"2026-04-01","last_verified_at":"2026-09-29T15:20:21Z","board_verified":true,"closed_at":null,"days_open":181,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":180},"description":"Who's Mubit?\nAI agents are being deployed into production faster than the infrastructure can support them. The result: engineers spending 5+ hours a week manually compensating for agents that have no memory of what they've done, what failed, or why.\nMubit is the operational memory and state management layer for production AI agents. We give agents persistent execution history, shared state, and ACL-gated memory - so they get more reliable over time without constant human intervention.\nWe're well funded and building the founding team. This is your chance to get in at the beginning of something real.\nWhat this role is\nYou'll be the first engineering hire and co-own the architecture of Mubit's core infrastructure.\nMubit sits in the hot path of production AI agents - sub-80ms retrieval, ACL-gated shared state, pub/sub event triggers, execution history across agent fleets. The systems you build are why agents get more reliable over time instead of requiring constant human intervention.\nThis isn't a spec-execution role. You'll identify the problems, own the trade-offs, and ship the solutions.\nOur office is in Canary Wharf (WeWork - 30 Churchill Place).\nWhat success looks like at 12 months\nRetrieval latency is consistently under 80ms at real customer scale\n\nThe SDK is something engineers recommend to each other - not something they tolerate\n\nYou've made architecture calls we're still building on at 10x current load\n\nEarly customers have integrated Mubit into production agent stacks without hand-holding\n\nYour first 90 days\nGet deep into the core storage and retrieval architecture - understand every trade-off already made and form opinions on what to change\n\nWork directly with early customers integrating Mubit into their agent stack (LangGraph, CrewAI, AutoGen, etc.)\n\nProfile latency, find the bottlenecks, fix them\n\nContribute to the SDK engineers use to connect their agents to Mubit\n\nMake infrastructure decisions that will still be the right ones at 100x scale\n\nYou're a fit if\nYou've built and run production systems - not just prototyped them\n\nYou understand distributed systems, storage trade-offs, and what it means to serve memory inside a hot execution loop\n\nYou can go from a vague problem statement to a working system with minimal direction\n\nYou have strong opinions about how infrastructure should be built - and you're willing to defend them\n\nYou care about the developer experience of the SDK you're building - you've been the frustrated user before\n\nYou're based in London and want to work on-site with the founding team, every day\n\nYou're not a fit if\nYou need a well-defined spec before you can start\n\nYou've only ever built greenfield systems at scale - you've never had to make something work from nothing\n\nYou want to prototype forever and have someone else own production\n\nWhat we offer\nMeaningful early-stage equity - priced to reflect that you're joining at the beginning\nCompetitive salary - we'll talk numbers early, no games\nBrand new MacBook + hardware of your choice\nPrivate health insurance\nCanary Wharf office - flexibility to work from home when needed\nDeliveroo dinners when you're working late\nUber home if you're in the office late - no one takes the night bus on our watch","description_format":"text","description_chars":3231,"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":["Apple Macbook","Equity","Health insurance"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","AI Agents"],"lifecycle":[{"event":"open","at":"2026-09-14T04:44:22Z"}],"liveness":{"score":5,"band":"cold","label":"Long shot","p_open":1,"p_active":0.177,"p_room":0.28,"age_days":180,"expected_fill_days":21,"reasons":["conf:3","win:tail","crowd:"],"computed_at":"2026-09-29T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/mubit-founding-engineer","json_url":"https://alion.io/job/mubit-founding-engineer.json","meta":{"generated_at":"2026-09-30T02:34:15Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":1784,"day_limit":5000,"remaining_today":3216,"minute_limit":60,"resets_at":"2026-10-01T00:00:00Z"}}}