MastercardSenior Integration Engineer
Mastercard is hiring a Senior Integration Engineer. Level rates it ; you can apply on Level.
AI in this role
Design and maintain robust automated test frameworks across API, UI, and performance layers for scalable billing platforms.
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 Integration EngineerOverviewAt Mastercard, our technology and innovation are driven by a clear purpose: to build a sustainable, inclusive global economy. Our commitment to being a force for good is embedded in The Mastercard Way—the principles and behaviors that define who we are and how we deliver value to our customers, partners, and communities.
We foster a highly collaborative and inclusive environment where employees are empowered to bring their full, authentic selves to work. By leveraging the diverse strengths, perspectives, and experiences of our global workforce, we continue to drive innovation at scale.
Role Summary
The Pricing & Billing Resource Center (PBRC) team develops and operates business-critical, API-driven platforms built on Java and Spring technologies. These platforms power highly scalable and reliable billing and pricing services across Mastercard.
Quality engineering is central to ensuring functional correctness, API integrity, UI reliability, and performance at scale.
This role is an automation-first Senior SDET position, responsible for designing, building, and maintaining robust automated test frameworks across API, UI, and performance layers. You will work closely with engineering teams to embed quality throughout the SDLC, ensuring speed, stability, and confidence in every release.
Key Responsibilities
1. Automation Ownership (API & UI)
• Design and maintain scalable, maintainable test automation frameworks using:
o Java + Selenium (UI automation)
o REST Assured (API automation)
o Cucumber (BDD) for executable specifications
o Cypress for modern UI testing where applicable
• Ensure automation suites are reliable, efficient, and aligned with engineering standards
2. API Quality Engineering
• Validate REST APIs built on Spring / Spring Boot for:
o Functional correctness
o Contract/schema adherence
o Error handling and edge cases
• Utilize Postman and Insomnia for exploratory testing and debugging, converting findings into automated coverage
3. Performance & Non-Functional Testing
• Design and execute performance, load, and stress tests using tools such as JMeter and BlazeMeter
• Define and track performance baselines across:
o Throughput
o Latency
o Resource utilization
• Partner with engineering teams to diagnose bottlenecks and optimize performance
4. CI/CD Integration
• Integrate automation suites into CI/CD pipelines to provide rapid feedback and enforce quality gates
• Enable parallel execution and efficient test runs across shared environments
5. Test Strategy & Quality Leadership
• Contribute to test strategy, coverage planning, and risk assessment
• Create high-quality defect reports with clear diagnostics and reproducibility
• Lead improvements in test frameworks, processes, and engineering standards
• Provide technical leadership and mentorship across QA and delivery teams
Required Qualifications
• 6+ years of experience in automation-focused QA / SDET roles
• Strong hands-on expertise in Java-based automation frameworks
• Deep experience with:
o Selenium (UI automation)
o REST Assured (API testing)
o Cucumber (BDD frameworks)
o Cypress (modern UI automation)
• Strong understanding of Spring / Spring Boot microservices architectures
• Experience testing RESTful APIs in distributed systems environments
• Hands-on experience with performance testing tools (JMeter, BlazeMeter)
• Solid understanding of CI/CD pipelines and automated test execution
• Strong analytical, debugging, and problem-solving skills
Preferred Qualifications
• Experience designing or evolving automation frameworks (beyond test case development)
• Familiarity with test design patterns (Page Object Model, abstraction layers, BDD best practices)
• Experience supporting high-scale, mission-critical systems with strict SLAs
• Experience in Agile/Scrum delivery models
• Exposure to containerized or cloud-based testing environments
• Familiarity with test management tools (e.g., Jira, ALM)
• Domain experience in billing, financial systems, payments, or card services
• Experience testing data pipelines, ETL processes, or streaming systemsMastercard 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: $96,000 - $163,000 USDHow we rate this
Senior Integration 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. Open the description and count.
Prepare for this job
A free preview built only from this posting: what it asks for, what you could be asked in an interview, and how to adjust your resume.
Skills and AI tools this role asks for
Questions you could be asked
- Tell me about a project where test automation was part of your work. What did you do?
- Tell me about a project where api testing was part of your work. What did you do?
- Tell me about a project where ui testing was part of your work. What did you do?
- Tell me about a project where performance testing was part of your work. What did you do?
- Tell me about a project where sdlc was part of your work. What did you do?
Adapt your resume
- List these exact terms on your resume: Test Automation, API Testing, UI Testing, Performance Testing, and Sdlc. 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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