Senior Technical Quality Assurance Engineer

Overview About Business Unit: Platform Services specializes in the implementation, management and evolution of Custom and PeopleCloud solutions, offering end-to-end support for clients. Our team of experts handles platform setup, ongoing management, and strategic enhancements, ensuring that our solutions adapt to changing business needs. From loyalty programs to digital activation, our platforms empower clients to implement campaigns, generate insights, and streamline business activities, all with a focus on seamless integration and continuous improvement. By collaborating with client partners and strategy teams, we create impactful campaigns tailored to each client’s unique objectives. Click here to view how Epsilon transforms marketing with 1 View, 1 Vision, 1 Voice. Responsibilities Performance Testing & Optimization Design, develop, and maintain performance test scripts using Apache JMeter for APIs, backend systems, and integrations. Set up and manage JMeter distributed testing environments (Master–Slave configuration) to simulate large-scale load tests. Analyze performance metrics (throughput, response time, latency, error rate) and identify performance bottlenecks in APIs or services. Collaborate with DevOps to integrate performance tests into CI/CD pipelines for continuous performance validation. Work with developers and architects to optimize system performance, scalability, and reliability. Generate and present detailed performance reports, providing insights and recommendations for improvement. Implement best practices for load, stress, endurance, and spike testing to ensure production readiness. Test Automation & Development Design and maintain automation for functional and regression testing across APIs and web systems. Utilize Python/Java and frameworks like TestNG/JUnit to enhance automation frameworks. Integrate automation with GIT, Jenkins, and Azure DevOps (VSTS) for seamless test execution. Write optimized SQL queries for backend data validation during performance testing. Leadership & Management Lead and mentor a performance and automation QA team, ensuring high standards of test delivery. Drive improvements in testing processes, tools, and performance benchmarking methods. Collaborate with cross-functional teams to ensure performance goals align with product requirements. Quality Assurance & Process Improvement Define performance SLAs and KPIs, and track them across environments. Advocate for performance-driven development by engaging early in design and architecture discussions. Continuously evaluate new tools and technologies for performance monitoring and scalability. Collaboration & Communication Communicate performance testing results and insights to stakeholders and leadership. Work with product and engineering teams to identify performance risks early in the release cycle. Provide regular updates on system stability and readiness before production rollout. Qualifications Technical Skills Strong hands-on experience in Performance Testing using Apache JMeter (API, backend, microservices). Proficiency in JMeter distributed (Master–Slave) setup, parameterization, correlation, and report analysis. Deep understanding of HTTP, REST, JSON, and API performance metrics. Experience integrating JMeter tests with CI/CD pipelines (Jenkins, Azure DevOps). Ability to interpret graphs and logs (CPU, memory, GC, thread dumps) for root cause analysis , load balancing solutions and performance tuning solutions. Familiarity with monitoring tools (Grafana, InfluxDB, Dynatrace, New Relic, etc.). Strong SQL knowledge for backend validation and performance database analysis. Working knowledge of automation frameworks (Selenium, TestNG, JUnit) is a plus. Management Skills Proven experience leading a Performance/QA team with measurable outcomes. Strong organizational, analytical, and reporting skills. Ability to guide engineers in test strategy, scripting, and results interpretation. Preferred Experience with cloud-based load testing (AWS, Azure, BlazeMeter, LoadRunner Cloud). Knowledge of API Gateway performance, caching, and scalability testing. Exposure to AI-driven performance monitoring tools. Additional Information Epsilon is a global data, technology and services company that powers the marketing and advertising ecosystem. For decades, we’ve provided marketers from the world’s leading brands the data, technology and services they need to engage consumers with 1 View, 1 Vision and 1 Voice. 1 View of their universe of potential buyers. 1 Vision for engaging each individual. And 1 Voice to harmonize engagement across paid, owned and earned channels. Epsilon’s comprehensive portfolio of capabilities across our suite of digital media, messaging and loyalty solutions bridge the divide between marketing and advertising technology. We process 400+ billion consumer actions each day using advanced AI and hold many patents of proprietary technology, including real-time modeling languages and consumer privacy advancements. Thanks to the work of every employee, Epsilon has been consistently recognized as industry-leading by Forrester, Adweek and the MRC. Epsilon is a global company with more than 9,000 employees around the world. Our pillars aren't just words. They're how we show up every day. People centricity: We focus on employee well-being in an environment where colleagues truly care about each other. Collaboration: We work together, support one another, and collectively achieve goals. Growth: There are endless opportunities for growth through learning, development and career advancement. Innovation: We drive progress through cutting-edge solutions and forward-thinking approaches. Flexibility: We’ve created a balance between work and personal life, and we encourage adaptability to solve problems creatively. Our values guide us to create value for our clients, our people and consumers. Act with integrity Work together to win together Innovate with purpose Respect all voices Empower with accountability These pillars and values are our foundation—shaping our culture, guiding our decisions, and uniting us in common purpose. Epsilon is an Equal Opportunity Employer. Epsilon is committed to promoting diversity, inclusion, and equal employment opportunities by using reasonable efforts to attract, recruit, engage and retain qualified individuals of all ethnicities and backgrounds, including, but not limited to, women, people of color, LGBTQ individuals, people with disabilities and any other underrepresented groups, traits or characteristics.