More in details, UST is a multinational company based in North America, certified as a Top Employer and Great Place to Work company with over ** employees all over the world and presence in more than 35 countries. We are leaders on digital technology services, and we provide large-scale technologic solutions to big companies.
We are looking for a Senior Performance Test Engineer to join our Performance Test Services team. In this role, you will act as a technical expert and trusted advisor, helping internal teams ensure that applications and services meet the highest standards of performance, scalability, stability, and availability.
Hybrid position in Madrid (3 days at client ?s office, Sol area, next to the underground)

Key Responsibilities
Design, develop, and execute performance and load testing strategies for business-critical applications.
Build and maintain synthetic monitoring solutions to proactively measure application availability and user experience.
Analyze test results and produce clear, actionable reports, including optimization recommendations.
Review and assess performance testing and monitoring code written in Java, JavaScript, and TypeScript.
Identify performance bottlenecks across applications, APIs, infrastructure, and integrations.
Act as a trusted advisor, supporting stakeholders in defining and implementing testing and monitoring strategies.
Contribute to the continuous improvement of testing frameworks, automation capabilities, methodologies, and best practices.
Ensure high-quality, scalable, and maintainable test solutions throughout the software delivery lifecycle.




Mandatory RequirementsPerformance TestingPerformance EngineeringTest AutomationSoftware EngineeringProven experience designing and executing performance and load testing within complex enterprise environments.
Strong analytical and troubleshooting skills with a structured approach to root-cause analysis.
Experience Developing Performance And Synthetic Monitoring Solutions UsingPlaywrightGrafana k6Experience working with CI/CD pipelines and automated test execution using:JenkinsGitLabBitbucketSimilar platformsStrong Understanding OfSystem architecturesAPIsNetworking conceptsCloud-native applicationsPerformance engineering principlesExperience communicating technical findings and translating them into business-relevant insights.
English C1Technical SkillsPlaywright (Java, TypeScript)Grafana k6 (JavaScript)CI/CD Pipelines (Bitbucket, Jenkins, GitLab)GrafanaPrometheusDynatracePerformance Testing & Monitoring MethodologiesObservability ConceptsOpenTelemetryDistributed TracingEnd-to-End Performance AnalysisCloud & Container PlatformsAzureKubernetesNice to HaveExperience with Exense StepExperience within Banking or Financial Services environmentsWhat can

we offer
? Program: (Meals, Kinder Garden, Transport, online English lessons, Heath Care Plan...)Free access to several training platformsProfessional stability and career plansUST also, compensates referrals from which you could benefit when you refer professionals.
Real Work Life Balance measures (flexibility, WFH or remote work policy, compacted hours during summertime...)Skillsk6, Performance Testing, Playwright, Performance Engineering, Observability, TypeScript, Prometheus, Dynatrace, CI/CD, Grafana, GitLab#J-*-Ljbffr

📌 Senior Test Engineer (Madrid)
🏢 Epam Systems
📍 Madrid