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 35.000 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.

Working closely with developers, architects, product owners, and operations teams, you will design, implement, execute, and analyze performance tests and synthetic monitoring solutions that contribute to software quality and system resilience across critical business platforms.

Hybrid position in Madrid (3 days at client´s office, Sol area, next to the underground).

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.

Performance Testing
Performance Engineering
Test Automation
Software Engineering

Proven 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 using:

Grafana k6

Experience working with CI/CD pipelines and automated test execution using:
Jenkins
GitLab
Bitbucket
Networking concepts
Cloud-native applications
Performance engineering principles
English C1

Playwright (Java, TypeScript)
Grafana k6 (JavaScript)
CI/CD Pipelines (Bitbucket, Jenkins, GitLab)
Grafana, Prometheus, Dynatrace
Performance Testing & Monitoring Methodologies

End-to-End Performance Analysis

Cloud & Container Platforms:
Azure
Kubernetes

Retribución Versátil´ Program: (Meals, Kinder Garden, Transport, online English lessons, Heath Care Plan…)
- Free access to several training platforms
- Real Work Life Balance measures (flexibility, WFH or remote work policy, compacted hours during summertime…)
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📌 Senior Performance Test Engineer - Hybrid Madrid
🏢 UST España & Latam
📍 Madrid