Job Description

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.

Location Zurich, Switzerland (Onsite) | Employment Type: Permanent, 80-100%

As an Advanced Mask Design Engineer, you will develop and maintain photomask layouts for VCSEL, Edge Emitter, and Photodiode products from initial concept through to production.

Working within our Process Integration team, you will collaborate closely with R&D, Process Engineering, Lithography, and Production teams to develop advanced mask designs, establish layout standards, and support the introduction of new photonic products. You will also use programming and scripting to improve the efficiency, accuracy, and scalability of the mask design process.

Key Responsibilities

• Develop and maintain photomask layouts for VCSEL, Edge Emitter, and Photodiode products from concept through to production

• Establish mask layout strategies and design methodologies for advanced lithographic processes, high-density 2D arrays, sub-100 nm patterns, and 2.5D features such as tapers and lenses

• Define, maintain, and improve design rules, layout standards, and verification methods

• Plan and perform lithographic simulations and process verifications in close collaboration with R&D, Process Engineering, and Lithography teams

• Support new product introductions through mask design reviews, design approvals, layout corrections, and technical consultation

• Develop scripts and programming solutions to improve the efficiency and consistency of mask design activities

• Manage mask-related documentation, manufacturing execution system (MES) activities, mask ordering, and engineering change processes

Qualifications

Master’s degree or PhD in Electrical Engineering, Physics, Photonics, Microsystems Engineering, or a related technical field

Experience in photomask design and layout development for semiconductor or photonic devices, gained through professional experience, a thesis, research, or academic projects

Additional Skills & Requirements

• Experience with advanced lithography concepts such as grayscale lithography, optical proximity effects, optical proximity correction, or submicron patterning is advantageous

• Knowledge of stepper systems or deep ultraviolet lithography technology is advantageous

• Proficiency in Python programming, Git, and engineering data management tools

• Excellent communication skills, a proactive approach, and the ability to collaborate effectively across multidisciplinary teams

• Fluent written and spoken English. German language skills are advantageous

Application Process

All candidates who wish to apply should submit a CV and cover letter outlining their interest in the position and how their skills and experience align with the requirements of the role.

Applications for this role close end of day on Monday, 17 August 2026.

If you require any adjustments or accommodations during the application process, please reach out to allegra.mousaw@coherent.com. We are committed to creating an inclusive and accessible recruitment experience and encourage applications from individuals of all backgrounds.

Coherent is a global leader in lasers, engineered materials and networking components. We are a vertically integrated manufacturing company that develops innovative products for diversified applications in the industrial, optical communications, military, life sciences, semiconductor equipment, and consumer markets. Coherent provides a comprehensive career development platform within an environment that challenges employees to perform at their best, while rewarding excellence and hard-work through a competitive compensation program. It's an exciting opportunity to work for a company that offers stability, longevity and growth. Come Join Us!

Note to recruiters and employment agencies: We will not pay for unsolicited resumes from recruiters and employment agencies unless we have a signed agreement and have required assistance, in writing, for a specific opening.