Software Developer Engineer in Test (SDET)

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Mr Who?

MrQ is an award‑winning online casino launched in 2018. We're big on tech, big on performance, and most of all – big on fun. Over the years, we have experienced explosive growth, which means we need more rock stars to join our quest for total world domination.

What You Will Do

  • Develop and maintain scalable end‑to‑end automated test frameworks for our website and mobile applications.
  • Contribute to a platform‑wide automated testing strategy, focusing on reliability, reusability, and test coverage.
  • Mentor team members and help foster a strong quality engineering culture across the organisation.
  • Collaborate with engineers and product teams to ensure high‑quality releases and shared ownership of quality gates.
  • Perform manual exploratory testing for complex workflows and edge cases.

What We're Looking For

  • 4+ years of hands‑on experience in software testing and automation.
  • Proficiency with tools such as Playwright, Cypress, or similar, using JavaScript/TypeScript.
  • Experience with CI/CD systems like Jenkins, TeamCity, or GitHub Actions.
  • Strong understanding of test strategy, versioning, and test data management.
  • A team player with excellent communication skills and a continuous improvement mindset.
  • Solid experience in manual testing, identifying UX/UI flaws, and debugging issues using Postman, browser developer tools, and network inspectors.

Nice to Have

  • Familiarity with cloud‑based cross‑platform testing services such as BrowserStack or Sauce Labs.
  • Experience writing BDD‑style tests using Cucumber or similar frameworks.
  • Exposure to mobile testing and device compatibility workflows.
  • Knowledge of performance testing tools such as k6.
  • Familiarity with WebSockets, visual regression testing tools such as Percy, and AI‑assisted exploratory testing.
  • Experience with unit and integration test automation in microservices or distributed systems.
  • Background in Agile/Scrum environments with cross‑functional team collaboration.

What We Offer

We offer a competitive salary package, additional leave days, birthday leave, a four‑week parental leave, international health and life insurance, wellness incentives, a growth allowance, and a flexible working environment. Join our friendly and multinational team where collaboration and camaraderie flourish.

We are committed to fostering a workplace that values and celebrates diversity. We welcome individuals of all backgrounds and experiences, and we believe that a diverse and inclusive environment leads to innovation and success. We actively promote equal opportunities for all employees and strive to create a space where everyone's voices are heard and respected.

#J-18808-Ljbffr”, “datePosted”: “2026-05-15”, “hiringOrganization”: { “@type”: “Organization”, “name”: “MrQ”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__432633687__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=192” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “St Albans” } } }
Company: MrQ
Apply for the Software Developer Engineer in Test (SDET)
Location: St Albans
Job Description:

Mr Who?

MrQ is an award‑winning online casino launched in 2018. We’re big on tech, big on performance, and most of all – big on fun. Over the years, we have experienced explosive growth, which means we need more rock stars to join our quest for total world domination.

What You Will Do

  • Develop and maintain scalable end‑to‑end automated test frameworks for our website and mobile applications.
  • Contribute to a platform‑wide automated testing strategy, focusing on reliability, reusability, and test coverage.
  • Mentor team members and help foster a strong quality engineering culture across the organisation.
  • Collaborate with engineers and product teams to ensure high‑quality releases and shared ownership of quality gates.
  • Perform manual exploratory testing for complex workflows and edge cases.

What We’re Looking For

  • 4+ years of hands‑on experience in software testing and automation.
  • Proficiency with tools such as Playwright, Cypress, or similar, using JavaScript/TypeScript.
  • Experience with CI/CD systems like Jenkins, TeamCity, or GitHub Actions.
  • Strong understanding of test strategy, versioning, and test data management.
  • A team player with excellent communication skills and a continuous improvement mindset.
  • Solid experience in manual testing, identifying UX/UI flaws, and debugging issues using Postman, browser developer tools, and network inspectors.

Nice to Have

  • Familiarity with cloud‑based cross‑platform testing services such as BrowserStack or Sauce Labs.
  • Experience writing BDD‑style tests using Cucumber or similar frameworks.
  • Exposure to mobile testing and device compatibility workflows.
  • Knowledge of performance testing tools such as k6.
  • Familiarity with WebSockets, visual regression testing tools such as Percy, and AI‑assisted exploratory testing.
  • Experience with unit and integration test automation in microservices or distributed systems.
  • Background in Agile/Scrum environments with cross‑functional team collaboration.

What We Offer

We offer a competitive salary package, additional leave days, birthday leave, a four‑week parental leave, international health and life insurance, wellness incentives, a growth allowance, and a flexible working environment. Join our friendly and multinational team where collaboration and camaraderie flourish.

We are committed to fostering a workplace that values and celebrates diversity. We welcome individuals of all backgrounds and experiences, and we believe that a diverse and inclusive environment leads to innovation and success. We actively promote equal opportunities for all employees and strive to create a space where everyone’s voices are heard and respected.

#J-18808-Ljbffr…

Posted: May 15th, 2026