9/12/2025 A Sr. Principal Software Engineer

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

Sr Principal Software Engineer

Overview:
Architecture & Technology (A&T) is a team of specialists and senior engineers who reach across Programs and teams across Mastercard. We extend our reach by sponsoring and supporting the Software Engineering Guild. Our focus is reviewing, teaching, making rules when necessary, and leaning in to help teams solve hard problems. We are skilled in security, design for operability and customer experience, privacy, and regulatory compliance and experts on our Technology Policies. We maintain several libraries of code that help our engineering teams move faster, avoid re-inventing wheels, and eliminate undifferentiated heavy lifting.

The Role:
As an A&T Sr Principal Software Engineer you will participate in numerous engagements with Mastercard engineering teams, as well as A&T deliverables such as patterns, frameworks, proof-of-concepts, incubated solutions, policy and standards updates, and shared libraries. You will be spearheading the delivery personally or providing technical leadership to a group of contributors, performing advisory, mentoring roles, and reviewing code.

Responsibilities:

1. Work on complex enterprise-wide initiatives spanning multiple services/programs and drive resolution.
2. Work with business/product owners to architect and deliver on new services to introduce new products and bundles.
3. Contribute and lead Guild initiatives to improve the craftsmanship of Software Engineering.
4. Drive the architectural design, including dependent services, service interactions, and policies.
5. Take ownership to improve the customer experience of an entire set of services/applications sold as products or bundled services.
6. Simplify and improve the cost/benefit of a function/service/architecture strategy.
7. Apply judgment and experience to balance trade-offs between competing interests.
8. Venture beyond comfort zone to take on assignments across different areas of Software Engineering.
9. Take on organization-wide public speaking engagements and publish white papers and blogs on relevant and emerging technical topics.
10. Consult across teams and program lines to identify synergies and reuse opportunities.
11. Write recommendations for job promotions based on an unbiased view of one's accomplishments.
12. Conduct technical interviews for hiring engineering staff and raising the performance bar.
13. Identify and raise awareness of siloed behaviors amongst teams within the program.
14. Mentor and guide software engineers and leads in the team to improve engineering productivity, quality, and technology policy compliance.
15. Engage with external technical communities to extend our reach and benefit from discovery outside of Mastercard and our industry.
16. Run Principal review architecture meetings and drive resolutions to enterprise-wide challenges and regulatory needs.
17. Mentor and coach Principal Engineers across the enterprise.
18. Proactively participate in setting Guild agenda and facilitate Principal community meetings across Mastercard tech hubs.

Skills and Experiences:

1. Experienced in leading the initiation and formation of large global projects including architecting, estimating, planning, implementing and operating.
2. IT experience with demonstrated thought-leadership and cross-functional influence.
3. Proven design and development experiences in multiple languages, secure coding standards, and vulnerability management.
4. Understands internals of operating systems (Windows, Linux, Mainframe) to write interoperable and performant code.
5. Has skills to develop and evangelize on reference architecture and run principles.
6. Understands use cases for advanced design patterns to implement efficient code.
7. Understands and implements API standards and cataloging.
8. Promotes and coaches teams on full stack development.
9. Has experience in leading and coaching teams in software planning and estimation.
10. Drives trade-off discussions to set right development capacity.
11. Experience in design and execution of automation across multiple business areas.
12. Expert understanding of DevOps best practices.
13. Performance engineering experience.
14. Skills to evaluate practices, metrics, and roles to optimize SDLC methodologies.
15. Experience in architecture and cost analysis for cloud environments.
16. Skills to articulate architecture patterns of complex systems to stakeholders.
17. Experience in setting up test environments simulating production setups.

Corporate Security Responsibility

All activities involving access to Mastercard assets, information, and networks come with an inherent risk to the organization. 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.

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