{"id":133544,"url":"https://alion.io/job/fireblocks-full-stack-engineer-blockchain","title":"Full Stack Engineer, Blockchain","company":{"id":47481,"name":"Fireblocks","domain":"fireblocks.com","url":"https://alion.io/company/fireblocks","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":95,"open_postings":5,"ghost_share":0,"stale_share":0.2,"repost_share":0,"time_to_fill_p50_days":56,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Web3","role_family":"Web3","seniority":"senior","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":null,"salary_estimate":{"min_usd":125000,"max_usd":211000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":27},"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Arbitrum","optional":false},{"name":"CI/CD","optional":false},{"name":"DeFi","optional":false},{"name":"Ethereum","optional":false},{"name":"Ethers.js","optional":false},{"name":"Node JS","optional":false},{"name":"Platform Engineering","optional":false},{"name":"Polygon","optional":false},{"name":"React.js","optional":false},{"name":"Smart Contracts","optional":false},{"name":"Solana","optional":false},{"name":"solana-web3.js","optional":false},{"name":"Stripe","optional":false},{"name":"TON","optional":false},{"name":"Tron","optional":false},{"name":"TypeScript","optional":false},{"name":"Web3.js","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-07-09T12:35:04Z","employer_posted_date":"2026-10-01","last_verified_at":"2026-10-17T14:52:18Z","board_verified":true,"closed_at":null,"days_open":100,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":100},"description":"Fireblocks is the company bringing global finance onchain. Backed by over $1 billion in capital, we are the premier digital asset infrastructure provider trusted by thousands of industry-defining financial institutions, including banks, payment providers, fintechs, and global corporates such as BNY Mellon, BNP Paribas, ANZ Bank, Western Union, Stripe, and Revolut. Built for institutional scale and security, our enterprise-grade platform and network have powered over $14 trillion in digital asset transfers worldwide.\nAbout Fireblocks\nFireblocks is on a mission to enable every business to easily and securely access digital assets and cryptocurrencies. As a leading provider in the digital asset space, we are committed to fostering a diverse and inclusive workforce that mirrors the global clientele we serve.\nAbout the Team\nThe FinApps Access team at Fireblocks builds the backbone of on-chain access for some of the world's largest financial institutions and crypto-native organizations. We operate at the intersection of blockchain protocol engineering and enterprise-grade reliability - designing systems that route, protect, and optimize transactions across dozens of chains at scale.\nYou'll work on mission-critical infrastructure powering DeFi connectivity, multi-chain integrations, transaction execution pipelines, and on-chain data access - with direct impact on how billions of dollars flow through decentralized networks every day.\nWhat You'll Do\nDesign and build robust, scalable backend services supporting high-volume on-chain transaction flows across multiple blockchain networks - both EVM and non-EVM.\nOwn end-to-end development of backend components and APIs - from architecture decisions to production deployment.\nLead integrations with DeFi protocols, on-chain data sources, and blockchain nodes across a wide range of chains and ecosystems.\nResearch and evaluate emerging blockchain technologies, protocols, and standards to keep Fireblocks at the cutting edge.\nOptimize existing production systems for performance, reliability, and security - reducing latency and increasing throughput.\nCollaborate closely with product, protocol research, and platform engineering teams to deliver high-quality solutions on time.\nDrive features from inception through to delivery at scale, taking full ownership of the product lifecycle.\nWhat You'll Bring\n7+ years of experience as a Backend or Full Stack Engineer.\nBachelor of Science (B.Sc.) or equivalent degree/experience.\nBlockchain and Web3 experience are a must - including deep understanding of transaction lifecycles, consensus mechanisms, smart contract interactions, and on-chain data.\nProven experience working across multiple blockchain ecosystems - EVM-compatible chains (Ethereum, Polygon, Arbitrum, Base, etc.) as well as non-EVM chains such as Solana, TON, Tron, or similar.\nProficiency in Node.js and TypeScript.\nExperience designing and operating microservices in production CI/CD environments.\nStrong understanding of security principles, cryptography, and best practices in a blockchain context.\nFamiliarity with DeFi protocols - AMMs, lending markets, bridging infrastructure, or on-chain routing - is a strong advantage.\nExperience with Web3 tooling and libraries (ethers.js, viem, web3.js, Solana web3.js, etc.).\nDemonstrated experience taking products from inception to delivery at scale.\nFull stack experience (React, frontend development) - a nice to have.\nAbout You\nYou think in systems and care deeply about correctness, reliability, and scale.\nYou're comfortable navigating ambiguity and can drive technical decisions with limited oversight.\nYou have a natural curiosity for how blockchain protocols work under the hood - and you actually read the specs.\nYou thrive in fast-moving environments and can balance shipping velocity with long-term code quality.\nYou communicate clearly and collaborate effectively across engineering, product, and research.\nWhy Fireblocks\nWork at the frontier of blockchain infrastructure, with real impact on how DeFi scales for institutional and retail users.\nTackle genuinely hard engineering problems - multi-chain routing, on-chain data indexing, protocol integrations, and more.\nCollaborate with world-class engineers, protocol researchers, and product minds in a fast-growing global company.\nCompetitive compensation, meaningful equity, and a culture that rewards ownership and initiative.\nFireblocks' mission is to enable every business to easily and securely access digital assets and cryptocurrencies. In order to do that, we strongly believe our workforce should be as diverse as our clients, and this is why we embrace diversity and inclusion in all its forms. \n Please see our candidate privacy policy here.","description_format":"text","description_chars":4741,"description_truncated":false,"requirements":{"experience_years_min":7,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Web3 & dApps","Blockchain Infrastructure","Crypto Wallets"],"lifecycle":[{"event":"open","at":"2026-07-09T12:35:04Z"}],"visa":[],"liveness":{"score":25,"band":"fade","label":"Fading","p_open":1,"p_active":0.702,"p_room":0.36,"age_days":99,"expected_fill_days":56,"reasons":["conf:0","win:tail","crowd:"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/fireblocks-full-stack-engineer-blockchain","json_url":"https://alion.io/job/fireblocks-full-stack-engineer-blockchain.json","meta":{"generated_at":"2026-10-17T15:50:43Z","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":21445,"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":47481},"rest":"https://alion.io/mcp/rest/get_company?id=47481"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ffireblocks-full-stack-engineer-blockchain"},{"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%2Ffireblocks-full-stack-engineer-blockchain"},{"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%2Ffireblocks-full-stack-engineer-blockchain"},{"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/fireblocks-full-stack-engineer-blockchain\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ffireblocks-full-stack-engineer-blockchain"}]}