{"id":770611,"url":"https://alion.io/job/fin-mobile-engineer","title":"Mobile Engineer","company":{"id":7591,"name":"Fin","domain":"fin.tech","url":"https://alion.io/company/fin","size_band":"1-10","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"C","score":58,"open_postings":10,"ghost_share":0.7,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":53,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Mobile","role_family":"Mobile","seniority":"middle","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["New York, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":125000,"max":250000,"currency":"USD","period":"year","gross":null,"usd_annual":250000},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Expo","optional":false},{"name":"React Native","optional":false},{"name":"AWS","optional":true},{"name":"GCP","optional":true},{"name":"JavaScript","optional":true},{"name":"React.js","optional":true},{"name":"Smart Contracts","optional":true},{"name":"Solana","optional":true},{"name":"Threat Modeling","optional":true}],"status":"live","first_seen_at":"2025-12-03T14:51:29Z","employer_posted_date":"2025-12-03","last_verified_at":"2026-10-16T11:55:00Z","board_verified":true,"closed_at":null,"days_open":316,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":316},"description":"About Fin\nFin is a next-generation payments platform built for high-value, global, and instant transactions. We are a Series A-stage company backed by Sequoia, Circle, and other notable investors. Powered by stablecoins, Fin enables users and businesses to move millions of dollars in seconds - whether to other Fin users, directly into bank accounts, or across crypto rails. By combining the speed of crypto with the reliability and trust of traditional finance, Fin reimagines how money moves worldwide. If banks and payment products were reinvented today, they would look like Fin.\nAbout the Role\nWe are looking for a Mobile Engineer to own our mobile experience across iOS and Android using React Native. This will be the first time many users interact with Fin, so your work will define how our product feels in the real world. You will turn messy real world payment flows into simple, intuitive interfaces, and help hide the complexity of crypto, wallets, and cross border settlement behind a smooth mobile experience.\nYou will work closely with the founders and the rest of the engineering team, make foundational decisions about architecture and design, and ship features from idea to production. If you care about building delightful consumer products on top of serious infrastructure, this is for you.\nWe value your time: our process focuses on practical system design and architectural discussions, not LeetCode grinding or unpaid take-home assignments.\nResponsibilities\nOwn the Fin mobile app across iOS and Android using React Native, from architecture to implementation and polish.\n\nDesign and implement flows that make sending, receiving, and managing money feel simple and trustworthy for everyday users.\n\nHelp design secure account and custody patterns that can scale to handle meaningful balances and real world usage.\n\nCollaborate with design and product to prototype, refine, and ship new features quickly.\n\nMaintain a high bar for code quality through thoughtful architecture, code review, and testing.\n\nWork with backend and infra engineers to integrate APIs, payments, and identity or security features into the mobile app.\n\nQualifications\n3+ years of experience building and shipping mobile apps in React Native. Deep familiarity with the Expo ecosystem and modern mobile build pipelines (EAS) is required.\n\nStrong product sense and attention to detail in UI and UX, especially for consumer facing apps.\n\nSolid understanding of mobile app architecture, performance, and offline or edge cases.\n\nAbility to work independently, set priorities, and drive projects from idea to shipped.\n\nStrong communication skills and comfort collaborating with design, product, and backend teams.\n\nInterest in payments, fintech, or crypto. You do not need to be a chain maximalist, but curiosity about the space helps.\n\nBonus Points\nYou have shipped an app from concept to production in a small team or as the primary developer.\n\nExperience in EITHER traditional consumer fintech apps (neobanks, peer-to-peer payments) OR mobile crypto wallets (Solana, non-custodial, etc).\n\nExperience with cloud platforms such as GCP or AWS.\n\nExperience deploying smart contracts on Solana or integrating with blockchain based systems.\n\nBackground in security, threat modeling, or penetration testing, especially for consumer finance products.","description_format":"text","description_chars":3333,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"Polish","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Smart Contracts & Security","Payment Processing & Gateways","Stablecoins"],"lifecycle":[{"event":"open","at":"2026-09-11T21:27:04Z"}],"visa":[],"liveness":{"score":5,"band":"cold","label":"Long shot","p_open":1,"p_active":0.163,"p_room":0.28,"age_days":316,"expected_fill_days":53,"reasons":["conf:3","stale_co","ghost","win:tail","crowd:"],"computed_at":"2026-10-16T05:45:00Z"},"pay":{"stated_usd_annual":250000,"is_top_pay":true},"html_url":"https://alion.io/job/fin-mobile-engineer","json_url":"https://alion.io/job/fin-mobile-engineer.json","meta":{"generated_at":"2026-10-16T12:27:13Z","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":11664,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-17T00:00:00Z"}},"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":7591},"rest":"https://alion.io/mcp/rest/get_company?id=7591"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ffin-mobile-engineer"},{"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%2Ffin-mobile-engineer"},{"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%2Ffin-mobile-engineer"},{"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/fin-mobile-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ffin-mobile-engineer"}]}