Test Development Engineer

As a Test Development Engineer, you will lead projects focused on the electro-optical characterization of semiconductor lasers and photodiodes, driving test solutions from concept and laboratory prototypes through to production release. You will develop hardware and software solutions while collaborating closely with R&D, production engineering, and manufacturing teams., * Design and implement electro-optical test solutions (hardware and software) for semiconductor laser diode characterization and beyond

• Develop scalable test concepts from early R&D evaluation to automated production test systems
• Integrate and specify measurement equipment (e.g., SMUs, current sources, spectrometers, photodiodes, thermal control)
• Develop and maintain test software in LabVIEW, Python and/or C/C++ programming
• Perform device characterization (e.g., LIV, spectral, thermal, reliability testing), data analysis and interpretation
• Transfer test methods into stable production environments and support yield/root cause analysis
• Collaborate cross-functionally with R&D, process engineering, manufacturing and external partners

B.Sc. or M.Sc. in Mechanical, Electrical Engineering, Physics, Photonics, or related field.

Previous experience in semiconductor and/or electro-optical device characterization is beneficial.

Skills & Other Requirements

• Strong understanding of electronics, measurement systems and automated test equipment
• Experience in CAD (Solidworks) and/or PCB design (Altium)
• Programming skills in LabVIEW, Python and/or C/C++ programming
• Structured, analytical mindset with strong problem-solving abilities
• Excellent verbal and written communication skills in English and German

Coherent Corp. is the global leader in photonics, designing and manufacturing advanced laser, optical, and material technologies used by customers worldwide across industrial, communications, electronics, and instrumentation markets. With a broad global footprint and deep engineering capability, we combine advanced manufacturing, applied innovation, and customer collaboration to deliver high-performance solutions that enable critical technologies and solve complex, real-world challenges. About Coherent in Switzerland Coherent Corp. Zurich is a key research and production hub specializing in advanced photonics, engineered materials, and high-power semiconductor laser technologies. Our teams develop and manufacture opto-electronic components and laser diodes for industrial, optical data transmission, life science, and high-precision applications, combining strong in-house R&D with state-of-the-art semiconductor manufacturing in an engineering-led culture.