{"id":179283,"url":"https://alion.io/job/mastercard-senior-software-engineer-integrations-api-connectivity-2","title":"Senior Software Engineer – Integrations & API Connectivity","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":87,"open_postings":189,"ghost_share":0.016,"stale_share":0.423,"repost_share":0.079,"time_to_fill_p50_days":27,"computed_at":"2026-10-31T05:58:55Z"}},"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":["Navi Mumbai, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":16500,"max_usd":39000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":168},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Copilot","optional":false},{"name":".NET","optional":true},{"name":"Amazon S3","optional":true},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"C#","optional":true},{"name":"CI/CD","optional":true},{"name":"Java","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Redis","optional":true},{"name":"Spring Boot","optional":true}],"status":"live","first_seen_at":"2026-08-31T11:45:28Z","employer_posted_date":"2026-10-01","last_verified_at":"2026-10-31T09:14:25Z","board_verified":true,"closed_at":null,"days_open":60,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":60},"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 Engineer - Integrations & API ConnectivityOverviewMastercard is a global technology company powering an inclusive, digital economy, enabling secure and seamless transactions across 210+ countries.\nThis role sits within Mastercard’s Open Finance Europe - Connectivity team, responsible for building and operating scalable API integrations with financial institutions across Europe.\nAs a Senior Software Engineer, you will be a key hands-on contributor responsible for designing, building, and operating secure, reliable backend services. You will work on complex engineering problems, contribute to system design decisions, and deliver high-quality solutions that operate at scale in production environments.\nRole-What You’ll Do\nDesign, develop, test, and support scalable APIs and backend services\nContribute to system design decisions with a focus on scalability, resilience, and performance\nDeliver high-quality, production-ready code across the full software development lifecycle\nTroubleshoot and resolve production issues, ensuring system stability and reliability\nParticipate in code reviews and uphold engineering best practices and standards\nImplement effective testing strategies (unit, integration, end-to-end)\nCollaborate with cross-functional teams including Product, Architecture, Security, and SRE\nImprove observability, automation, and operational efficiency across services\nTechnology Stack\nBackend: C#, .NET, Web APIs\nCloud: Azure (App Services, KeyVault, Blob Storage), AWS (S3, Redis, Microservices)\nData: PostgreSQL, Flyway\nPractices: CI/CD pipelines, observability, secure development\nPlus: Java / Spring Boot, AI-assisted tools (e.g., GitHub Copilot)\nAll about you-What You Bring - Required\n3-5 years of professional software engineering experience\nStrong hands-on experience building cloud-based, distributed backend systems\nSolid expertise in API development, scalability, and production support\nAbility to solve complex technical problems with a structured, pragmatic approach\nStrong understanding of SDLC, testing practices, and secure coding principles\nProven ability to own and deliver components/services independently\nStrong collaboration and communication skills\nPreferred\nExperience in payments, banking, or Open Banking (PSD2) environments\nExperience working with microservices architectures\nFamiliarity with observability, monitoring, and incident response practices\n• Exposure to AI-assisted development tools (e.g., GitHub Copilot)\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.","description_format":"text","description_chars":3607,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Cards & Card Issuing","Payment Processing & 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