April 12, 2026

Senior Load Test Engineer

Senior • Remote

4,000 - 5,900 EUR

Warsaw, MZ, Poland

Please note: Remote mode but later hybrid in Warsaw

Position Overview

We are looking for a Senior Load Test Engineer who is passionate about performance testing. You understand how systems work when many users use them at the same time. You know how to find problems before real users experience them. You can clearly explain what is wrong and why it needs to be fixed. You work independently, manage your testing process from start to finish, and care about keeping our platform fast and stable as it grows.

Key Responsibilities

  • Plan and run load, stress, spike, and long-running tests on important parts of our platform.

  • Study the results and find exactly where and why performance becomes worse.

  • Work closely with backend engineers to understand the system and identify the real bottlenecks.

  • Create and maintain performance test scripts that can be reused, stored in version control, and easily updated when the product changes.

  • Add performance tests to CI/CD pipelines so problems can be detected early.

  • Set performance goals and limits together with engineering and product teams.

  • Watch how the platform behaves under load using monitoring tools and connect metrics with test results.

  • Write clear reports and give practical recommendations to engineering teams.

Qualifications

  • 5+ years of practical experience with performance and load testing for large production systems.

  • Strong experience with tools such as k6, Gatling, JMeter, or Locust, including creating complex scripts from the beginning.

  • Good understanding of backend systems, databases, and how infrastructure behaves under heavy load.

  • Ability to read and understand metrics from tools like Grafana, Datadog, New Relic, or similar.

  • Good knowledge of HTTP, WebSockets, and real-time communication protocols.

  • Experience testing APIs under load, including authentication flows, many users at the same time, and stateful scenarios.

  • Familiar with CI/CD pipelines and adding performance tests to automated build processes.

  • Comfortable using Git and working in agile engineering teams.

Soft Skills

  • Naturally curious — you like to understand why a system behaves in a certain way under pressure.

  • Strong analytical thinking — you can review many metrics and quickly find the most important problem.

  • Good communication — you can explain complex performance issues clearly to both developers and product managers.

  • Self-motivated — you do not wait for someone to tell you there is a problem; you actively look for it.

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Warsaw, Poland

20,160 - 21,840 PLN

🏢 Summary: Senior Test Automation Engineer role focused on designing and maintaining scalable automated testing frameworks for UI and API, integrating them into CI/CD pipelines, and ensuring high software quality. The position combines hands-on automation development with collaboration in Scrum teams and active contribution to quality standards. On-site work in Warsaw. 🗂️ Requirements: 5+ years experience in QA or Test Automation, Strong Java programming skills, Experience with Playwright or Selenium or RestAssured or Postman or Newman, Experience with CI/CD tools, Ability to design test cases and use Jira with Xray or Zephyr, Understanding of ISTQB Foundation principles, Proficiency with Git, Fluent Polish, Fluent English, Legal right to work in EU 📃 Skills: Java, Playwright, Selenium, RestAssured, Postman, Newman, GitLabCI, GitHubActions, AzureDevOps, Jenkins, Jira, Xray, Zephyr, ISTQB, Git, Docker, Kubernetes, AWS, Azure, GCP, Cucumber, Python, CSharp, JavaScript, TypeScript, Scrum, CI, CD 🏢 Description: Empower quality at the forefront — lead the charge in advanced test automation! Warszawa-based opportunity with on-site work model. As a Senior Test Automation Engineer , you will be working for our client, a leader in software development dedicated to delivering high-quality solutions. You will play a pivotal role in designing and maintaining robust automated testing frameworks, ensuring the delivery of reliable, defect-free software. This is your chance to drive innovation in quality assurance and elevate your career in a dynamic, collaborative environment. Your main responsibilities: Design, implement, and maintain automated tests for UI, API, regression, and integration, boosting testing efficiency and coverage. Develop and optimize automation frameworks in accordance with best practices, ensuring scalability and reliability. Integrate automated tests into CI/CD pipelines to support continuous delivery and monitor stability. Analyze automated test results, report defects, and collaborate with development and DevOps teams for prompt resolution. Create and execute manual, functional, and exploratory tests to validate new features and changes each sprint. Participate actively in Scrum ceremonies, contributing to sprint planning, reviews, and retrospectives to promote quality from inception through delivery. Collaborate with the team to define quality standards, risk mitigation strategies, and ensure adherence to Definition of Done and Ready criteria. You're ideal for this role if you have: At least 5 years of experience as a QA or Test Automation Engineer. Hands-on experience with Java programming language. Proven experience with automation frameworks such as Playwright, Selenium, RestAssured, or Postman/Newman. Familiarity with CI/CD tools like GitLab CI, GitHub Actions, Azure DevOps, or Jenkins. Ability to design test cases and work with test management tools like Jira combined with Xray or Zephyr. Solid understanding of testing techniques aligned with ISTQB Foundation principles. Good command of Git. It is a strong plus if you have: (optional) Knowledge of additional programming languages: Python, C#, JavaScript/TypeScript. Experience in performance testing. Familiarity with Docker/Kubernetes and test environment containerization. Knowledge of cloud testing platforms (Azure, AWS, GCP). Experience with shift-left testing strategies, contract testing, or BDD (e.g., Cucumber). Language Required for the role: Fluent in Polish and English. Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.