{"id":109441,"url":"https://alion.io/job/swift-blockchain-developer","title":"Blockchain Developer","company":{"id":35426,"name":"Swift","domain":"swift.com","url":"https://alion.io/company/swift-com","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":90,"open_postings":13,"ghost_share":0,"stale_share":0.385,"repost_share":0,"time_to_fill_p50_days":54,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Web3","role_family":"Web3","seniority":"staff","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Manassas, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":121564,"max":225762,"currency":"USD","period":"year","gross":null,"usd_annual":225762},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"CI/CD","optional":false},{"name":"DeFi","optional":false},{"name":"Ethereum","optional":false},{"name":"Foundry","optional":false},{"name":"Hardhat","optional":false},{"name":"JavaScript","optional":false},{"name":"Python","optional":false},{"name":"Rust","optional":false},{"name":"Smart Contracts","optional":false},{"name":"Solana","optional":false},{"name":"Solidity","optional":false},{"name":"Token Standards","optional":false},{"name":"Truffle","optional":false},{"name":"TypeScript","optional":false}],"status":"live","first_seen_at":"2026-05-21T00:00:00Z","employer_posted_date":"2026-05-21","last_verified_at":"2026-10-15T19:16:11Z","board_verified":true,"closed_at":null,"days_open":149,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":148},"description":"ABOUT US\nWe’re the world’s leading provider of secure financial messaging services, headquartered in Belgium. We are the way the world moves value - across borders, through cities and overseas. No other organisation can address the scale, precision, pace and trust that this demands, and we’re proud to support the global economy.\nWe’re unique too. We were established to find a better way for the global financial community to move value - a reliable, safe and secure approach that the community can trust, completely. We’re always striving to be better and are constantly evolving in an ever-changing landscape, without undermining that trust. Five decades on, our vibrant community reflects the complexity and diversity of the financial ecosystem. We innovate diligently, test exhaustively, then implement fast. In a connected and exciting era, our mission has never been more relevant. Swift now has a presence in 200+ countries and legal territories to serve a community of more than 12,000 banks and financial institutions.\nEducation\nUniversity degree in computer science or related field. Or equivalent work experience.\nExperience\n10 to 12 years' experience in systems development.\nKey Responsibilities\nDesign and develop blockchain-based applications and smart contracts\n\nBuild and maintain decentralized systems using platforms such as Ethereum, Solana, or Hyperledger Besu\n\nWrite secure, efficient smart contracts using languages like Solidity or Rust\n\nConduct code reviews, testing, debugging, and security audits\n\nOptimize blockchain performance, scalability, and transaction efficiency\n\nIntegrate blockchain solutions with APIs, databases, and cloud services\n\nMentor junior developers and contribute to technical leadership\n\nStay updated on emerging blockchain technologies, protocols, and best practices\n\nRequired Skills & Qualifications\nStrong experience in blockchain development and distributed systems\n\nProficiency in Solidity, Rust, JavaScript/TypeScript, Go, or Python\n\nDeep understanding of smart contracts, cryptography, consensus mechanisms, and Web3 technologies\n\nExperience with frameworks/tools such as Hardhat, Truffle, and Foundry\n\nFamiliarity with DeFi, NFTs, wallets, and token standards (ERC-20, ERC-721)\n\nKnowledge of security best practices and vulnerability mitigation\n\nExperience with CI/CD pipelines, cloud platforms, and agile development\n\nPreferred Qualifications\nBachelor’s or Master’s degree in Computer Science or related field\n\nContributions to open-source blockchain projects\n\nRelevant blockchain certifications or published projects\n\nTypical Outcomes\nDeliver secure and scalable blockchain products\n\nImprove transaction efficiency and platform reliability\n\nSupport innovation in decentralized finance, digital assets, and enterprise blockchain solutions\n\nThe estimated salary range for a new hire into this position in Virginia is $121,564 USD Annual to $225,762 Annual USD. Salary may vary depending on job-related factors which may include knowledge, skills, experience, and location. Our compensation packages include a competitive base salary and bonus opportunity for all employees contingent on personal and company performance. Our generous benefits program includes medical, dental, vision and life insurance with no premium costs for our employees and their families, and retirement plan plus matching 401k.\nWhat we offer\nWe give you the freedom to be yourself. We are creating an environment of unique individuals - like you - with different perspectives on the financial industry and the world. A diverse and inclusive environment in which everyone’s voice counts and where you can reach your full potential.\nWe are committed to an inclusive and accessible recruitment process. If you require a reasonable accommodation related to accessibility during your application or interview, please contact  or indicate this in your application.\nPlease note that this mailbox is not monitored for general recruitment enquiries and should only be used for accessibility or accommodation-related requests (for example related to vision, hearing or neurodiversity).\nAll requests are confidential and will not affect your candidacy.\nDon’t meet every single requirement? At Swift, we are dedicated to building a workplace where people can bring their full selves and ideas to the team, so if you are excited about this role, we encourage you to apply even if you do not meet every single qualification.","description_format":"text","description_chars":4475,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["401k plan","Life insurance","Retirement plans"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Cryptocurrencies","Financial Software & Embedded Finance","Stock Exchanges & Market Infrastructure"],"lifecycle":[{"event":"open","at":"2026-05-21T00:00:00Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 23 · green card filings: 23","filings_12m":23,"filings_prev_12m":27,"green_card_filings_12m":23,"median_offered_wage_usd":162500,"route":null,"cap_exempt":false,"checked_at":"2026-10-15T11:24:14+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)","US Department of Labor: PERM disclosure data (green cards)"],"filings_for_role_12m":18}],"liveness":{"score":17,"band":"cold","label":"Long shot","p_open":1,"p_active":0.622,"p_room":0.28,"age_days":148,"expected_fill_days":54,"reasons":["conf:10","velocity","win:tail","crowd:"],"computed_at":"2026-10-16T05:45:00Z"},"pay":{"stated_usd_annual":225762,"is_top_pay":true},"html_url":"https://alion.io/job/swift-blockchain-developer","json_url":"https://alion.io/job/swift-blockchain-developer.json","meta":{"generated_at":"2026-10-17T03:40:44Z","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":4822,"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":35426},"rest":"https://alion.io/mcp/rest/get_company?id=35426"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fswift-blockchain-developer"},{"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%2Fswift-blockchain-developer"},{"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%2Fswift-blockchain-developer"},{"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/swift-blockchain-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fswift-blockchain-developer"}]}