Develop and execute comprehensive test plans, test cases, automated test sequences and test scripts for control systems Perform functional and performance testing on control system software Collaborate with software engineers (internal/external) and project managers Conduct root cause analysis of identified issues and work with development teams to ensure timely resolution Participate in code reviews and provide feedback from a testing perspective Take ownership for test projects in terms of time and cost planning Provide clear and concise test reports and documentation Bachelor's degree in Computer Science, Software Engineering, or a related field Proven experience as a Software Tester, Quality Assurance Engineer, or similar role Strong understanding of software testing methodologies, tools, and processes in all project phases from requirements analysis to go-live Experience with automated testing tools ISTQB-Certificate min. Foundation Level required Proficiency in programming languages like C++, C#, ASP.NET, Vue.js as well as in scripting languages such as Python, JavaScript, or similar Familiarity with control systems and embedded systems is highly desirable Excellent problem-solving skills and attention to detail Strong communication and collaboration skills Ability to work independently and as part of a team Knowledge of refrigeration systems or HVAC industry is a plus Fluent English language (C1/2), German language (B2) What we offer: Flexible working hours Tariff pay Mobile working possible (not fully remote) 30 annual leave JobRad Public Transport Ticket (Deutschlandticket) subsidized Company canteen Individual further training opportunities A motivated and international team What happens after your application has been submitted? You will receive an email once your application has been processed. One of our Talent Acquisition Specialists will review your application and ensure that you meet the qualification criteria. Once your application has been successfully reviewed, you will be invited to an initial interview, either virtually or in person, depending on the position. We usually make a decision after the first or second round of interviews.