{"id":40706,"url":"https://alion.io/job/mastercard-senior-software-development-engineer","title":"Senior Software Engineer","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":94,"open_postings":254,"ghost_share":0.016,"stale_share":0.358,"repost_share":0.094,"time_to_fill_p50_days":21,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["O'Fallon, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":115000,"max":184000,"currency":"USD","period":"year","gross":null,"usd_annual":184000},"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Angular","optional":false},{"name":"Apache Kafka","optional":false},{"name":"Checkmarx","optional":false},{"name":"CI/CD","optional":false},{"name":"JavaScript","optional":false},{"name":"Jenkins","optional":false},{"name":"JUnit","optional":false},{"name":"Mockito","optional":false},{"name":"Rest API","optional":false},{"name":"Scrum","optional":false},{"name":"Spring Data JPA","optional":false},{"name":"SQL","optional":false},{"name":"Dynatrace","optional":true},{"name":"Java","optional":true},{"name":"Kotlin","optional":true},{"name":"Splunk","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-08-04T00:00:00Z","employer_posted_date":"2026-09-28","last_verified_at":"2026-10-17T03:51:18Z","board_verified":true,"closed_at":null,"days_open":74,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":74},"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\nSenior Software EngineerOverviewAt Mastercard Commercial Solutions, we empower businesses to succeed through innovative, trusted payment solutions that deliver seamless, digital-first experiences around the world.\nWe are building a global business-to-business (B2B) technology platform that helps businesses of all sizes streamline how they manage payments when buying or selling products and services.\nThe Mastercard Commercial Solutions team is looking for a Senior Software Engineer to advance our customer experience strategy through innovation and problem-solving. The ideal candidate is passionate about the customer journey and is highly motivated, intellectually curious, and analytical.\nRole\nYou will work at our Mastercard technology location in O’Fallon, which provides a collaborative, state-of-the-art environment where technology teams can thrive within our Agile engineering culture. You will play a key role in transforming the B2B space by helping standardize, automate, and optimize digital payment efficiency for buyers and sellers.\nOwn software delivery activities at the application or software-component level, including design, development, testing, deployment, support, documentation, and configuration.\nDevelop full-stack solutions, including front-end applications, REST APIs, and backend services.\nTranslate business and technical requirements into scalable, secure, and maintainable software designs, defining appropriate components and system interactions.\nParticipate in Scrum ceremonies and contribute to continuous improvement using Agile methodologies.\nDrive code, design, and process trade-off discussions within the team.\nPromote the adoption of engineering principles, technology standards, and best practices.\nReview code, testing, and automation produced by team members to ensure quality, security, standards compliance, and maintainability.\nDevelop a strong understanding of end-to-end technical architecture and system dependencies.\nEvaluate application architecture and design decisions with consideration for scalability, performance, reliability, and long-term maintainability.\nMentor and guide new and less-experienced team members.\nDevelop and maintain unit, integration, functional, and regression tests.\nAnalyze and optimize application performance through testing, measurement, troubleshooting, and tuning.\nDesign and maintain applications for operational readiness by incorporating reliability, observability, monitoring, and effective production-support practices.\nTroubleshoot production incidents and implement corrective and preventive actions.\nShare and seek knowledge within the Guild and program to promote the reuse of patterns, libraries, and engineering practices.\nAll About You\nRequired Experience\nExperience developing secure full-stack applications using backend and front-end technologies such as Java, JavaScript, Angular, and SQL.\nStrong knowledge of Spring, Spring Data JPA, REST APIs, Kafka, and related frameworks.\nExperience designing, implementing, and maintaining unit, service, integration, functional, and regression tests using tools such as JUnit, Mockito, and Jasmine.\nKnowledge of application and design patterns used to implement APIs, event-driven services, batch services, and user-interface applications.\nStrong understanding of data structures and their application in building efficient, reliable, and maintainable software.\nExperience applying secure coding standards and vulnerability-management practices throughout the software development lifecycle.\nExperience implementing API standards and cataloging practices to support service adoption, reuse, and commercialization.\nExperience using tools such as Sonar, CxOne, Checkmarx, Black Duck, and Zally to evaluate code quality, security vulnerabilities, and anti-patterns.\nExperience orchestrating release workflows and implementing standardized continuous integration and continuous delivery pipelines using tools such as Jenkins and XL Release.\nExperience evaluating and improving application performance, scalability, and reliability using appropriate testing and tuning techniques.\nStrong problem-solving and creative troubleshooting skills, with the ability to diagnose and resolve issues across applications and integrated systems.\nStrong organizational skills and the ability to manage multiple priorities within business timelines.\nSelf-motivated and proactive, with a commitment to continuous improvement and delivering results.\nAbility to thrive in a fast-paced, rapidly changing, and customer-focused environment.\nAbility to promote full-stack engineering practices and end-to-end service ownership across teams.\nStrong written and verbal communication skills.\nBachelor’s degree in Computer Science, Software Engineering, or a related field.\nEight or more years of relevant software engineering or information technology experience.\nDesirable Skills\n• Experience with monitoring and observability tools such as Splunk or Dynatrace.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.\n\nTHIS POSTING RELECTS ONE OR MORE CURRENT VACANCIES ON OUR TEAM, AND MASTERCARD INTENDS TO FILL THIS POSITION BY 12/27/2026.\n\nPay Ranges\nO'Fallon, Missouri: $115,000 - $184,000 USD","description_format":"text","description_chars":8223,"description_truncated":false,"requirements":{"experience_years_min":8,"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":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Cards & Card Issuing","Payment Processing & Gateways"],"lifecycle":[{"event":"open","at":"2026-08-04T00:00:00Z"}],"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":"2026-10-15T11:24:14+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":36}],"liveness":{"score":12,"band":"cold","label":"Long shot","p_open":1,"p_active":0.411,"p_room":0.28,"age_days":74,"expected_fill_days":21,"reasons":["conf:1","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-17T05:46:00Z"},"pay":{"stated_usd_annual":184000,"is_top_pay":true},"html_url":"https://alion.io/job/mastercard-senior-software-development-engineer","json_url":"https://alion.io/job/mastercard-senior-software-development-engineer.json","meta":{"generated_at":"2026-10-17T07:34:35Z","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":10236,"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":252},"rest":"https://alion.io/mcp/rest/get_company?id=252"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmastercard-senior-software-development-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%2Fmastercard-senior-software-development-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%2Fmastercard-senior-software-development-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/mastercard-senior-software-development-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmastercard-senior-software-development-engineer"}]}