Develop, test, and support scalable APIs and backend services for financial institution integrations. Build reliable software, implement automated tests, troubleshoot production issues, participate in code reviews, and collaborate with Product, Architecture, Security, and SRE teams. Improve observability, automation, security, and operational efficiency while applying modern cloud, distributed-systems, and software engineering practices.
Our Purpose
Mastercard 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.
Title and Summary
Software Engineer II - Integrations & API Connectivity
Overview
Mastercard is a global technology company powering an inclusive, digital economy, enabling secure and seamless transactions across 210+ countries.
This role sits within Mastercard's Open Finance Europe - Connectivity team, responsible for building and operating scalable API integrations with financial institutions across Europe.
As a Software Engineer II, you will be a hands-on engineer responsible for building, testing, and supporting secure, reliable backend services. You will contribute to the development of scalable solutions, collaborate with experienced engineers on system design and implementation, and help deliver high-quality software that operates in production environments.
What You'll Do• Develop, test, and support scalable APIs and backend services• Contribute to the design and implementation of reliable, maintainable software solutions• Deliver high-quality code throughout the software development lifecycle• Troubleshoot and resolve application and production issues under guidance from senior team members• Participate in code reviews and follow established engineering best practices and standards• Implement and maintain unit, integration, and end-to-end tests• Collaborate with cross-functional teams including Product, Architecture, Security, and SRE• Support efforts to improve observability, automation, and operational efficiency across services• Continuously learn and apply new technologies, tools, and engineering practices
Technology Stack• Backend: C#, .NET, Web APIs• Cloud: Azure (App Services, KeyVault, Blob Storage), AWS (S3, Redis, Microservices)• Data: PostgreSQL, Flyway• Practices: CI/CD pipelines, observability, secure development• Plus: Java / Spring Boot, AI-assisted tools (e.g., GitHub Copilot)
What You Bring - Required• 2-4 years of professional software engineering experience• Experience developing backend applications and APIs using modern programming frameworks• Familiarity with cloud platforms and distributed systems concepts• Understanding of software development lifecycle (SDLC), testing practices, and secure coding principles• Ability to analyze and solve technical problems with guidance from senior engineers when needed• Experience delivering software components and features in a collaborative team environment• Strong communication and teamwork skills• Commitment to learning, continuous improvement, and engineering excellence
Preferred• Experience in payments, banking, or Open Banking (PSD2) environments• Exposure to microservices-based architectures• Familiarity with monitoring, observability, and production support practices• Experience using AI-assisted development tools (e.g., GitHub Copilot)
Corporate Security Responsibility
All 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:
Mastercard 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.
Title and Summary
Software Engineer II - Integrations & API Connectivity
Overview
Mastercard is a global technology company powering an inclusive, digital economy, enabling secure and seamless transactions across 210+ countries.
This role sits within Mastercard's Open Finance Europe - Connectivity team, responsible for building and operating scalable API integrations with financial institutions across Europe.
As a Software Engineer II, you will be a hands-on engineer responsible for building, testing, and supporting secure, reliable backend services. You will contribute to the development of scalable solutions, collaborate with experienced engineers on system design and implementation, and help deliver high-quality software that operates in production environments.
What You'll Do• Develop, test, and support scalable APIs and backend services• Contribute to the design and implementation of reliable, maintainable software solutions• Deliver high-quality code throughout the software development lifecycle• Troubleshoot and resolve application and production issues under guidance from senior team members• Participate in code reviews and follow established engineering best practices and standards• Implement and maintain unit, integration, and end-to-end tests• Collaborate with cross-functional teams including Product, Architecture, Security, and SRE• Support efforts to improve observability, automation, and operational efficiency across services• Continuously learn and apply new technologies, tools, and engineering practices
Technology Stack• Backend: C#, .NET, Web APIs• Cloud: Azure (App Services, KeyVault, Blob Storage), AWS (S3, Redis, Microservices)• Data: PostgreSQL, Flyway• Practices: CI/CD pipelines, observability, secure development• Plus: Java / Spring Boot, AI-assisted tools (e.g., GitHub Copilot)
What You Bring - Required• 2-4 years of professional software engineering experience• Experience developing backend applications and APIs using modern programming frameworks• Familiarity with cloud platforms and distributed systems concepts• Understanding of software development lifecycle (SDLC), testing practices, and secure coding principles• Ability to analyze and solve technical problems with guidance from senior engineers when needed• Experience delivering software components and features in a collaborative team environment• Strong communication and teamwork skills• Commitment to learning, continuous improvement, and engineering excellence
Preferred• Experience in payments, banking, or Open Banking (PSD2) environments• Exposure to microservices-based architectures• Familiarity with monitoring, observability, and production support practices• Experience using AI-assisted development tools (e.g., GitHub Copilot)
Corporate Security Responsibility
All 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:
- Abide by Mastercard's security policies and practices;
- Ensure the confidentiality and integrity of the information being accessed;
- Report any suspected information security violation or breach, and
- Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.
Similar Jobs at Mastercard
Blockchain • Fintech • Payments • Consulting • Cryptocurrency • Cybersecurity • Quantum Computing
Principal Data Engineer responsible for setting enterprise data-platform strategy and architecture across multiple teams. Defines standards for Databricks, Spark, dbt, DataOps, CI/CD, and observability; leads platform architecture, technology evaluations, migration, scalability, deployment, and cost strategy. Resolves complex cross-cutting data challenges, mentors senior engineers, influences architecture decisions, and partners with leadership on long-term roadmaps.
Top Skills:
SparkCi/CdDatabricksDataopsDbtDelta LakeDistributed SystemsUnity Catalog
Blockchain • Fintech • Payments • Consulting • Cryptocurrency • Cybersecurity • Quantum Computing
Lead the strategy, architecture, and evolution of enterprise data platforms supporting secure data exchange, discovery, governance, integration, and self-service consumption. Establish scalable patterns for data quality, lineage, observability, privacy, and security while reducing bespoke workflows through automation. Provide technical leadership across engineering organizations, influence architecture decisions, mentor technical teams, and translate complex business needs into reusable cloud and on-premises data solutions.
Top Skills:
Aws GlueAzure Data FactoryBigQueryClouderaDatabricksFlinkHadoopKafkaNifiOraclePythonSnowflakeSparkSQL
Blockchain • Fintech • Payments • Consulting • Cryptocurrency • Cybersecurity • Quantum Computing
As a Software Engineer II, you'll design, develop, and maintain software solutions while collaborating with project teams and enhancing code quality and processes.
Top Skills:
Software Engineering Concepts
What you need to know about the Chennai Tech Scene
To locals, it's no secret that South India is leading the charge in big data infrastructure. While the environmental impact of data centers has long been a concern, emerging hubs like Chennai are favored by companies seeking ready access to renewable energy resources, which provide more sustainable and cost-effective solutions. As a result, Chennai, along with neighboring Bengaluru and Hyderabad, is poised for significant growth, with a projected 65 percent increase in data center capacity over the next decade.
