{"id":986143,"url":"https://alion.io/job/mastercard-software-engineer-ii-blockchain","title":"Software Engineer II - Blockchain","company":{"id":252,"name":"Mastercard","domain":"mastercard.com","url":"https://alion.io/company/mastercard","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":86,"open_postings":177,"ghost_share":0.017,"stale_share":0.492,"repost_share":0.079,"time_to_fill_p50_days":27,"computed_at":"2026-11-06T05:58:05Z"}},"role":"Web3","role_family":"Web3","seniority":"middle","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Arlington, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":106000,"max":169000,"currency":"USD","period":"year","gross":null,"usd_annual":169000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"AI Agents","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"Ethereum","optional":false},{"name":"Ethers.js","optional":false},{"name":"Foundry","optional":false},{"name":"Git","optional":false},{"name":"Hardhat","optional":false},{"name":"JavaScript","optional":false},{"name":"Smart Contracts","optional":false},{"name":"Solidity","optional":false},{"name":"TypeScript","optional":false},{"name":"Web3.js","optional":false},{"name":"Angular","optional":true},{"name":"Arbitrum","optional":true},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"GCP","optional":true},{"name":"Java","optional":true},{"name":"Layer 2","optional":true},{"name":"LLM","optional":true},{"name":"Optimism","optional":true},{"name":"Polygon","optional":true},{"name":"React.js","optional":true},{"name":"Solana","optional":true},{"name":"Spring Boot","optional":true}],"status":"live","first_seen_at":"2026-09-16T23:40:30Z","employer_posted_date":"2026-09-16","last_verified_at":"2026-11-06T06:57:07Z","board_verified":true,"closed_at":null,"days_open":50,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":50},"description":"Our Purpose\nMastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.\nTitle and Summary\nSoftware Engineer II - BlockchainOverview:Mastercard is looking for a talented Software Engineer II - Blockchain to join the Mastercard Blockchain and Digital Assets Engineering team. In this role, you will be part of a highly collaborative Agile team building innovative, scalable products leveraging blockchain technologies and components for global markets.\nYou will work alongside experienced engineers to design, develop, test, and support Ethereum/EVM and Web3 solutions, contributing to enterprise-grade applications with a focus on scalability, security, reliability, and performance.\nOur team is built on a foundation of research and development, innovation mentality, thinking through new product lines using Blockchain / Distributed ledger technology, managing new products from inception to market validation and engaging strategically with start-ups to shape the future of commerce within the digital assets space with and for our customers. At Mastercard you will help architect and lead the future of commerce globally.\nThis team will have a major focus on adopting Blockchain technology to bring innovative payment solutions to market. Engineers on this team will also have the opportunity to work alongside cutting-edge AI tools and agentic systems as part of our broader innovation agenda.\nThis is a hybrid role based in Arlington, VA, requiring three days per week onsite.\nRole:\nDevelop, test, deploy, and maintain blockchain applications, smart contracts, and Web3 integrations within the Ethereum/EVM ecosystem.\nCollaborate with senior engineers, architects, and product teams to deliver secure, scalable, and reliable solutions.\nParticipate in technical design discussions and contribute ideas to address business and technical challenges.\nTranslate business requirements into high-quality code aligned with engineering standards and best practices.\nParticipate in code reviews, testing activities, and development processes to ensure software quality and maintainability.\nWork closely with product, compliance, security, and engineering teams throughout the software development lifecycle.\nTroubleshoot and resolve issues in development, test, and production environments.\nContribute to improving engineering processes, automation, tooling, and development practices.\nDevelop and support applications running in cloud-native, containerized environments.\nFollow secure coding practices and operational excellence standards throughout development and delivery.\nAll About You:\nExperience as a Software Engineer, Software Developer, or similar engineering role.\nExperience developing applications using Ethereum/EVM and Web3 technologies such as ethers.js, web3.js, or similar frameworks.\nWorking knowledge of Solidity and experience developing or maintaining smart contracts.\nUnderstanding of blockchain fundamentals, including transactions, wallets, gas concepts, and common security considerations.\nFamiliarity with smart contract development frameworks such as Hardhat, Foundry, or similar toolchains.\nKnowledge of software engineering principles, object-oriented programming, and modern development practices.\nExperience with programming languages such as Java, TypeScript, JavaScript, or similar technologies.\nFamiliarity with source control systems such as Git and collaborative software development practices.\nExperience building or maintaining automated unit and integration tests.\nExposure to containerization technologies such as Docker and cloud-native development concepts.\nFamiliarity with CI/CD pipelines and automation tools.\nAbility to learn new technologies quickly and contribute effectively in a fast-paced Agile environment.\nStrong problem-solving, communication, and collaboration skills.\nCommitment to code quality, maintainability, security, and continuous improvement.\nBachelor's degree in Computer Science, Engineering, Information Systems, or equivalent practical experience.\nPreferred Qualifications:\nExperience with enterprise blockchain platforms such as Hyperledger Besu, Quorum, or Canton.\nFamiliarity with Layer 2 scaling technologies, including Polygon, Arbitrum, or Optimism.\nKnowledge of smart contract security practices and common vulnerability patterns.\nFamiliarity with non-EVM blockchain ecosystems such as Solana.\nExperience with Java and frameworks such as Spring or Spring Boot.\nFamiliarity with TypeScript and frontend frameworks such as React or Angular.\nExposure to AI-powered developer tools, LLM integrations, or agentic development frameworks.\nExperience developing applications in cloud environments such as AWS, Azure, or Google Cloud.\nThis role is not eligible for Mastercard’s work authorization sponsorship. As such, candidates must be eligible to work in the United States, now as well as in the future, without employer sponsorship.Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. We hire the most qualified candidate for the role. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact  and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.\nCorporate Security Responsibility\nAll activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:\nAbide by Mastercard’s security policies and practices;\n\nEnsure the confidentiality and integrity of the information being accessed;\n\nReport any suspected information security violation or breach, and\n\nComplete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.\n\nIn line with Mastercard’s total compensation philosophy and assuming that the job will be performed in the US, the successful candidate will be offered a competitive base salary and may be eligible for an annual bonus or commissions depending on the role. The base salary offered may vary depending on multiple factors, including but not limited to location, job-related knowledge, skills, and experience. Mastercard benefits for full time (and certain part time) employees generally include: insurance (including medical, prescription drug, dental, vision, disability, life insurance); flexible spending account and health savings account; paid leaves (including 16 weeks of new parent leave and up to 20 days of bereavement leave); 80 hours of Paid Sick and Safe Time, 25 days of vacation time and 5 personal days, pro-rated based on date of hire; 10 annual paid U.S. observed holidays; 401k with a best-in-class company match; deferred compensation for eligible roles; fitness reimbursement or on-site fitness facilities; eligibility for tuition reimbursement; and many more. Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty leave; and on-site fitness facilities in some locations.Pay Ranges\nArlington, Virginia: $106,000 - $169,000 USD","description_format":"text","description_chars":7926,"description_truncated":false,"requirements":{"experience_years_min":null,"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"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Cards & Card Issuing","Cryptocurrencies","Payment Processing & Gateways"],"lifecycle":[{"event":"open","at":"2026-09-16T23:40:30Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 110 · green card filings: 139","filings_12m":110,"filings_prev_12m":161,"green_card_filings_12m":139,"median_offered_wage_usd":137520,"route":null,"cap_exempt":false,"checked_at":"2026-10-29T16:27:21+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":36}],"liveness":{"score":17,"band":"cold","label":"Long shot","p_open":1,"p_active":0.469,"p_room":0.36,"age_days":50,"expected_fill_days":27,"reasons":["conf:4","stale_co","velocity","win:tail","crowd:brand"],"computed_at":"2026-11-06T05:58:05Z"},"pay":{"stated_usd_annual":169000,"is_top_pay":false},"html_url":"https://alion.io/job/mastercard-software-engineer-ii-blockchain","json_url":"https://alion.io/job/mastercard-software-engineer-ii-blockchain.json","meta":{"generated_at":"2026-11-06T09:04:57Z","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":16421,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-07T00:00:00Z"}},"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":252},"rest":"https://alion.io/mcp/rest/get_company?id=252"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmastercard-software-engineer-ii-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%2Fmastercard-software-engineer-ii-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%2Fmastercard-software-engineer-ii-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/mastercard-software-engineer-ii-blockchain\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmastercard-software-engineer-ii-blockchain"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":986143}},{"tool":"search_jobs","arguments":{"company":"mastercard.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":986143},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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