# Senior Integration Engineer at Mastercard

Mastercard is hiring a Senior Integration Engineer. Level rates it Little AI ●○○○; you can [apply on Level](https://jobsbylevel.com/go/4b607ef2-16c5-4c68-b474-8625f1c5fc75).

AI Level 1, AI centrality 0 out of 100. O'Fallon, Missouri.

## Details

- Company: [Mastercard](https://jobsbylevel.com/companies/mastercard)
- AI level: AI Level 1 (score 0 out of 100)
- Location: O'Fallon, Missouri
- Posted: September 30, 2026
- Apply: https://jobsbylevel.com/go/4b607ef2-16c5-4c68-b474-8625f1c5fc75

## Description

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 Engineer Overview At 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,

The description is cut here. Read the full offer: https://jobsbylevel.com/jobs/senior-integration-engineer-at-mastercard-2f4a84

Source: https://jobsbylevel.com/jobs/senior-integration-engineer-at-mastercard-2f4a84

## Cite this page

Level. https://jobsbylevel.com/jobs/senior-integration-engineer-at-mastercard-2f4a84.

Get job alerts: https://jobsbylevel.com/newsletter