MastercardSenior Software Engineer
Mastercard is hiring a Senior Software Engineer. Level rates it ; you can apply on Mastercard.
Level's read on this job
- Little AI ●○○○ is how Level rates this software engineer role: aI is not part of the work.
- Tools and skills the posting cites include full stack development, api and automated testing.
- Level classifies it as a senior role.
- Level lists 1,000+ other open roles at Mastercard.
AI in this role
Senior Full Stack Software Engineer to design, develop, and test payment platforms and foreign exchange rate-setting services.
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
Senior Software EngineerOverviewMastercard's Core Payments engineering teams build and support the platforms responsible for secure, reliable, and scalable payment capabilities around the world. This Senior Full Stack Software Engineer will contribute to mission-critical solutions that support Foreign Exchange rate setting across Mastercard, including external APIs clients use to access exchange rates and internal services that help power high-impact payment operations.
Working closely with product managers, business stakeholders, and engineering teams, you will design and deliver new features, strengthen automated testing practices, and improve the efficiency, quality, and stability of systems operating at global scale. This role is well suited for a software engineer who can move across front-end, back-end, APIs, and automated integration testing while staying curious, collaborative, and quick to respond when something breaks during development.
Role
•Design, develop, and enhance full stack applications, APIs, and services that support Mastercard's Core Payments and Foreign Exchange rate-setting capabilities.
•Deliver new features from design sessions and team planning through implementation, automated testing, release support, and ongoing enhancement.
•Build and maintain automated unit, functional, integration, and regression tests that improve release speed and help the team quickly identify issues during development.
•Support work that is approximately 10% design sessions and team meetings, 60% software implementation, and 30% automated integration testing and development.
•Build business and product knowledge over time, becoming a trusted resource within the team while helping newer engineers learn, ask questions, and grow.
•Translate business and product requirements into scalable, maintainable solutions that meet functional and non-functional requirements.
•Define acceptance criteria, testing strategies, and quality standards that promote stable and predictable releases.
•Participate in requirements reviews, sprint planning, and technical discussions to deliver incremental value throughout the development lifecycle.
•Create and maintain technical designs, user stories, and test cases using Jira.
•Contribute to architecture discussions, helping shape solutions that prioritize performance, resiliency, maintainability, and security.
•Review code, provide constructive feedback, and promote engineering practices that improve software quality and reduce technical debt.
•Analyze system behavior, troubleshoot production issues, perform root-cause analysis, and implement long-term corrective actions.
•Enhance operational readiness through monitoring, observability, recoverability, and supportability improvements.
•Identify opportunities to optimize application performance and scalability while supporting service-level objectives.
All About You
•Strong proficiency in Java, Spring Boot, Jakarta Persistence API/JPA, and REST-based services using JSON and XML.
•Proven ability to build automated unit, functional, integration, and regression testing solutions, with a clear understanding of why automation matters for mission-critical systems.
•Ability to work across APIs, web applications, and full stack development, with Angular or a similar front-end framework strongly preferred; React is also relevant.
•Curious, humble, and open to new ideas, with the confidence to ask questions, learn quickly, and support a collaborative team environment.
•Ability to design scalable software solutions that balance performance, maintainability, security, and operational reliability.
•Familiarity with distributed systems, service-oriented architectures, and modern software design patterns.
•Strong understanding of software quality principles, test strategy development, and automation frameworks such as JUnit.
•Knowledge of CI/CD practices and automated delivery pipelines.
•Ability to evaluate code quality, identify improvement opportunities, and contribute to a culture of continuous improvement.
•Strong troubleshooting and analytical skills with the ability to diagnose and resolve complex technical issues.
•Understanding of performance engineering concepts, including scalability, throughput, and optimization techniques.
•Commitment to secure coding practices and development standards that support highly available enterprise applications.
•Solid understanding of data structures and algorithms and their application to real-world engineering challenges.
•Effective communication skills with the ability to collaborate across engineering, product, program management, and business teams.
•Comfortable balancing multiple priorities while delivering high-quality solutions in a fast-paced Agile environment.
•Familiarity with Agile methodologies and tools such as Jira.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 reasonable_accommodation@mastercard.com 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.
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.
Pay Ranges
O'Fallon, Missouri: $115,000 - $184,000 USDHow we rate this
Senior Software Engineer at Mastercard rates 0 out of 100 for how much of the daily work is AI. That makes it Little AI (AI Level 1 of 4). The level is about AI in the job, not seniority.
Little AI. AI is not part of the work.
- ●●●● Builds AI80 to 100
- ●●●○ Works on AI60 to 79
- ●●○○ Uses AI40 to 59
- ●○○○ Little AI0 to 39
Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.
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Skills and AI tools this role asks for
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Pay
- Typical software engineer job
- $168k
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Questions you could be asked
- Tell me about a project where full stack development was part of your work. What did you do?
- Tell me about a project where api was part of your work. What did you do?
- Tell me about a project where automated testing was part of your work. What did you do?
- Tell me about a project where java was part of your work. What did you do?
Adapt your resume
- List these exact terms on your resume: Full Stack Development, API, Automated Testing, and Java. An applicant tracking system matches the wording, not the idea.
- Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.
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