Are you ready to ensure the performance of a large‐scale laboratory platform through modern testing strategies and automation? Join our expert team to work on a laboratory platform ecosystem, contributing to the development of scalable performance testing capabilities for complex systems. You will apply your knowledge of k6, JavaScript/TypeScript, Docker, GitHub Actions and observability tools to validate production‐scale workloads while improving testing automation and reliability.
At ERNI, you are never just a number. Even if you work on an external project, you will feel part of the team and always supported.
How do we make this happen?
We provide supportive mentorship through a manager, a godparent to help with practical and administrative aspects during your first six months, and a mentor who will guide your onboarding and career progression. Regular one‐on‐ones and a development plan help you set short‐, medium‐ and long‐term goals.
What You Will Bring
5+ years of experience in performance and load testing using k6, JMeter, Gatling or similar tools.




Strong programming skills with JavaScript/TypeScript and experience with Python, Java, SQL, Docker and TestContainers.
Experience building CI/CD pipelines with GitHub Actions and working with Git‐based pull request workflows.
Hands‐on experience with Grafana, Prometheus, Loki, Tempo or equivalent observability platforms to analyze system behavior.
Ability to define testing strategies, mentor other engineers and work autonomously in complex environments.
Professional working proficiency in English required.
You will be responsible for designing and implementing realistic performance testing scenarios while building reusable tooling and containerized testing environments. You will automate execution through CI/CD pipelines, analyze metrics and bottlenecks using observability platforms, contribute to testing strategy, mentor another engineer and continuously improve the performance testing ecosystem.
What if the proje

📌 Senior Performance Testing Engineer – k6 (Barcelona)
🏢 Erni
📍 Barcelona