Senior Software Engineer

We are looking for a Senior Software Engineer who is excited to engage deeply with the core technologies we use, design and implement robust and secure "common code", and create a great development experience for other engineers through libraries, APIs, and tooling. As a member of our team, you would apply your skills to provide reusable solutions for all development teams in domains like authentication, caching, serving static assets, logging, error handling, build tooling, unit and integration testing, and scheduling asynchronous work.

Engineers work in small, flexible teams. Every team member contributes to designing, building, and testing features. There are no rigid organizational structures, and each team uses processes that work the best for that team members and projects

Who is Mastercard?

Mastercard is the global technology company behind the world's fastest payments processing network. We are a vehicle for commerce, a connection to financial systems for the previously excluded, and a technology innovation lab. We ensure every employee has the opportunity to be a part of something bigger and to change lives. We believe as our company grows, so should you.

The Role
You will be responsible for programming, testing, implementation, documentation, maintenance and support of systems application software in adherence with MasterCard standards, processes and best practices.

Responsibilities include the following:

• Collaborate with engineers to develop and maintain high-volume, high-performance .NET applications.
• Work with technical leads and product managers to define features and write user stories that align with project requirements.
• Lead day-to-day system development and maintenance efforts, ensuring alignment with SLAs.
• Seek opportunities to enhance standards and streamline processes, improving team efficiency.
• Actively contribute to agile discussions and retrospectives to drive continuous improvement.
• Troubleshoot and resolve complex technical issues in both the development and production environments.
• Contribute to the entire software development lifecycle, including planning, coding, testing, deploying, and supporting applications.
• Apply best practices in software engineering, ensuring clean, efficient, and maintainable code using object-oriented programming (OOP) principles and modern frameworks.
• Mentor junior engineers and contribute to team knowledge-sharing, fostering a culture of continuous improvement.

All About You:

• Proven full-stack development experience with expertise in back-end development.
• Proven expertise in .NET development using frameworks such as EF etc.
• Strong background in RESTful APIs and JSON/SOAP-based APIs.
• Familiarity with Agile development practices.
• Excellent knowledge of software engineering concepts and methodologies.
• Experience building global-scale, high-quality solutions.
• Strong verbal and written communication skills, with the ability to convey complex information to both technical and non-technical stakeholders.
• Proactive problem-solver with a focus on identifying solutions and driving them to implementation.
• Experience having worked with and designed "common code" and/or developer tools
• Experience having worked on system design problems

• Manage builds and artifacts delivery/release using standard tools. Ability to understand/automate software upgrades, patches, and releases via CI/CD pipelines. Familiarity with application/system metrics collection, observability, and monitoring.
• Bachelor's degree in Information Technology, Computer Science, Software Engineering, or a related field. Equivalent practical experience will be considered.

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.