Software Test Engineer

We are looking for a hands-on Software Test Engineer to ensure the quality and reliability of software solutions used in real-world sensing and data processing systems. Optics11 is a deep-tech company developing advanced fiber-optic sensing technologies for challenging environments and applications in energy and underwater security. Our systems enable high-performance sensing and monitoring through advanced photonics, signal processing, and data-driven intelligence. We are expanding our R&D team with a Software Test Engineer who is passionate about quality, structured validation, and delivering robust software in complex engineering environments. As a Software Test Engineer, you will be responsible for defining and executing practical software tests to validate software components (including algorithms, cloud back-end, and user interfaces) that process sensor signals generated by fiber-optic sensing systems. You will work closely with data scientists, signal processing specialists, back-end developers, and software architects to ensure that products meet functional and non-functional requirements. This role requires a hands-on professional with a proactive mindset, a structured approach to software testing, strong attention to detail, and the ability to understand complex technical systems and translate requirements into effective test strategies. Key Responsibilities - Perform functional, integration, regression, system, and end-to-end testing across edge devices, cloud services, APIs, databases, and graphical user interfaces. - Define test strategies, test plans, test cases, acceptance criteria, and automated test scripts for an edge and cloud software platforms. - Identify, document, and track software defects, ensuring clear reproduction steps and proper follow-up. - Collaborate with product owners, developers and engineers to understand system requirements and ensure test coverage. - Contribute to the development and maintenance of automated test frameworks and pipelines. - Test edge–cloud behaviour under interrupted connectivity, delayed or duplicated messages, device restarts, software updates, and synchronization failures. - Validate software performance, reliability, and stability under different operating conditions. - Support testing of software running on edge hardware, including hardware–software integration in laboratory and field environments. - Analyse test results and provide clear, actionable feedback to development teams. - Ensure traceability between requirements, test cases, and test results. - Integrate automated tests into GitLab CI/CD pipelines and help define appropriate quality gates. - Contribute to continuous improvement of testing processes, tools, and quality standards. - Participate in release readiness reviews and ensure software meets quality benchmarks before deployment. - Join one of Europe’s most promising deep-tech scale-ups. - Shape the future of a rapidly growing multidisciplinary R&D organization. - Competitive salary and benefits package. - Enjoy regular team activities and company events. - Fresh team lunches provided 3 times/week.