> Markdown version of [/jobs/ext/2699152-software-engineer-professional-test](https://www.wearedevelopers.com/jobs/ext/2699152-software-engineer-professional-test). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer Professional-test - **Company:** METTLER TOLEDO - **Location:** Tiel, Netherlands - **Contract:** Permanent contract - **Skills:** Clean Code Principles, JavaScript (Programming Language), Agile Methodology, Automation of Tests, Software Bug Management, Object-Oriented Software Development, Regression Testing, Selenium, TypeScript, Playwright, Api Management - **Published:** September 4, 2026 - **Apply:** https://www.werk.nl/nl/vacatures/71159402 ## About the Role Familiarity with BDD/TDD practices. Experience working in agile environments. - Strong test automation background. - Proficiency in JavaScript / TypeScript. - Strong understanding of object-oriented programming, and clean code principles. - Experience with Playwright and/or Selenium. - Hands-on experience in API testing. - Proven track record of requirement analysis, test design and defect management. - Ability to create clean, reusable, and maintainable automation code. - Strong communication and collaboration skills. - Ability to work effectively in a cross-functional team environment. Nice to have skills - Knowledge of Laboratory domain / Automated Chemistry systems. - Knowledge of testing in connected systems. - Exposure to or experience in contract ... ## Description Analyse functional and technical requirements and translate them into effective test scenarios and automation coverage. - Develop and maintain reusable, scalable, and reliable automated test scripts. - Perform UI and API automation using modern tools and frameworks. - Contribute to contract testing activities to validate service interactions and integrations. - Identify technical issues, dependencies, and risks, and communicate them clearly to project stakeholders. - Participate in defect triage, regression testing, and root cause analysis. - Maintain test documentation, execution evidence, and related quality records. - Review test cases, automation code, and associated test artifacts to ensure quality and adherence to standards. - Work collaboratively with cross-functional teams to support timely and high-quality software delivery. - Continuously improve automation practices by adopting standards, best practices, and maintainable design approaches. ## Related Videos - [Proactive monitoring and smoke testing in your production environment](https://www.wearedevelopers.com/videos/139-proactive-monitoring-and-smoke-testing-in-your-production-environment) - [Yes, You Need to Unit Test your JavaScript. Here's How.](https://www.wearedevelopers.com/videos/439-yes-you-need-to-unit-test-your-javascript-here-s-how) - [Boost Productivity with AI: Figma & Playwright MCP Workflows - Aris Markogiannakis](https://www.wearedevelopers.com/videos/1768-boost-productivity-with-ai-figma-playwright-mcp-workflows-aris-markogiannakis) - [Do TypeScript without TypeScript](https://www.wearedevelopers.com/videos/327-do-typescript-without-typescript) - [Are Classical Automation Frameworks Dead? How AI Agents Are Transforming QA](https://www.wearedevelopers.com/videos/100243-are-classical-automation-frameworks-dead-how-ai-agents-are-transforming-qa) - [How not to test ](https://www.wearedevelopers.com/videos/175-how-not-to-test) ## Related Articles - [The 8 Best Code Testing Tools](https://www.wearedevelopers.com/magazine/402-the-8-best-code-testing-tools) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Should senior developers refuse interview coding challenges?](https://www.wearedevelopers.com/magazine/29-should-senior-developers-refuse-interview-coding-challenges) - [Software Developer Salary in The Netherlands [2023]](https://www.wearedevelopers.com/magazine/217-software-developer-salary-in-the-netherlands-2023) - [Exploring TypeScript: Benefits for Large-Scale JavaScript Projects](https://www.wearedevelopers.com/magazine/554-exploring-typescript-benefits-for-large-scale-javascript-projects) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)