{"id":2545505,"url":"https://alion.io/job/fun-protocol-engineer","title":"Protocol Engineer","company":{"id":1839272,"name":"Fun","domain":"fun.xyz","url":"https://alion.io/company/fun-xyz","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"C","score":66,"open_postings":14,"ghost_share":0.571,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Web3","role_family":"Web3","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":["New York, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":178000,"max_usd":380000,"period":"year","method":"role_country_seniority_unknown","sample_n":35},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Core Blockchain","optional":false},{"name":"DeFi","optional":false},{"name":"Move","optional":false},{"name":"Rust","optional":false},{"name":"Smart Contracts","optional":false},{"name":"Solidity","optional":false},{"name":"Ethereum","optional":true},{"name":"Solana","optional":true}],"status":"live","first_seen_at":"2025-09-22T01:33:52Z","employer_posted_date":"2025-09-22","last_verified_at":"2026-10-17T03:32:38Z","board_verified":true,"closed_at":null,"days_open":390,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":389},"description":"Capital markets are undergoing a fundamental shift. Assets that live in fragmented systems and manual workflows are moving onto blockchains -systems designed to move and store value more transparently and efficiently.\nWhile this unlocks more open and programmable financial systems, it also introduces significant complexity. For most users, interacting with this new infrastructure is still too difficult.\nFun builds the infrastructure that powers consumer-facing fintech applications - handling onboarding, account access, and money movement so users can interact with blockchain-based systems as seamlessly as they do with traditional finance.\nFor fintech builders, Fun provides a best-in-class onboarding and deposit stack that drives conversion and unlocks user growth. We operate at the intersection of financial infrastructure, complex engineering, and product experience.\nRole Overview\nWe're looking for a Protocol Engineer to join our core blockchain team and help build the foundation of Web3 payments infrastructure. This high-impact role offers the opportunity to work on challenging technical problems at the intersection of smart contracts, cross-chain protocols, and decentralized finance.\nYou will design and implement secure, efficient smart contract systems and blockchain integrations that power millions of transactions across multiple chains. This role is perfect for a technically strong engineer who thrives in fast-paced environments and wants to shape the future of decentralized finance.\nResponsibilities\nDesign, develop, and deploy secure smart contracts and protocol implementations across multiple blockchain platforms\nCollaborate with backend and product teams to architect blockchain solutions that meet business requirements\nWrite highly efficient, well-tested code and participate in security audits to ensure protocol safety\nResearch and evaluate new blockchain technologies, protocols, and DeFi primitives for integration opportunities\nContribute to incident response and debugging on-chain issues to ensure protocol reliability\nRequirements\nStrong experience building and deploying production smart contracts on major blockchain platforms\nDeep understanding of blockchain architecture, consensus mechanisms, and cryptographic principles\nHands-on experience with smart contract development languages (Solidity, Rust, Move, etc.)\nSolid grasp of DeFi protocols, token standards, and cross-chain communication patterns\nStrong security mindset with knowledge of common smart contract vulnerabilities and best practices\nClear communicator who can explain complex blockchain concepts to cross-functional teams\nNice to Have\nProduction experience with multiple blockchain ecosystems (Ethereum, Solana, L2s, etc.)\nPreviously worked at crypto startup or Web3 infrastructure company\nExperience with cross-chain bridges, oracles, or interoperability protocols\nBackground with high-volume DeFi protocols or DEX infrastructure\nContributions to blockchain open source projects or protocol research\nExperience with formal verification or advanced smart contract testing frameworks","description_format":"text","description_chars":3099,"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":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Smart Contracts & Security","DeFi","Financial Software & Embedded Finance"],"lifecycle":[{"event":"open","at":"2026-10-14T16:37:52Z"}],"visa":[],"liveness":{"score":5,"band":"cold","label":"Long shot","p_open":1,"p_active":0.168,"p_room":0.28,"age_days":389,"expected_fill_days":63,"reasons":["conf:0","stale_co","ghost","win:tail","crowd:"],"computed_at":"2026-10-16T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/fun-protocol-engineer","json_url":"https://alion.io/job/fun-protocol-engineer.json","meta":{"generated_at":"2026-10-17T04:12:33Z","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":5455,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"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":1839272},"rest":"https://alion.io/mcp/rest/get_company?id=1839272"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ffun-protocol-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%2Ffun-protocol-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%2Ffun-protocol-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/fun-protocol-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ffun-protocol-engineer"}]}