Optical Coating Engineer (f/m/d)

Optical Coating Engineer (f/m/d)

Shape the future of optical coating for Photonic Semiconductor devices

Location: Dortmund, Germany
Employment Type: Full-time (40 hours/week) | Permanent

At Innolume, we develop innovative optoelectronic semiconductor technologies for next-generation communication, sensing and photonic applications. Our expertise ranges from advanced quantum-dot and quantum-well technologies to customized photonic devices tailored to our customers' requirements.

To strengthen our engineering team, we are looking for an experienced optical coating engineer (f/m/d) who is passionate about optical thin-film technologies and turning advanced coating concepts into robust, production-ready processes.

In this role, you will take technical ownership of facet coating equipment and processes—from thin-film design and process development to characterization, troubleshooting and transfer into stable production. You will work hands-on with coating and measurement systems and collaborate closely with production, R&D, quality, and other engineering teams.

If you enjoy combining optics, materials science and process engineering and want to see your solutions make a tangible impact in photonic semiconductor manufacturing, we would love to meet you.

• Develop and optimize optical thin-film and facet coating processes for optoelectronic semiconductor devices
• Take technical ownership of facet coating equipment, including maintenance coordination, measurement processes and failure analysis
• Design and simulate thin-film stacks based on anti-reflection (AR) requirements and the optical properties of coating materials
• Measure and characterize thin films using ellipsometry, SEM, profilometry and related metrology methods
• Develop specialized passivation and thin-film coating concepts for different laser diode facets
• Apply structured experimentation and statistical process control (SPC) to improve process capability, quality and yield
• Improve coating and stacking processes, including related hardware and software
• Transfer new coating processes and technologies from development into stable production
• Analyze technical failures, troubleshoot complex process and equipment issues and implement sustainable solutions
• Collaborate closely with Production, R&D, Quality, IT and other engineering teams
• Prepare technical and process documentation, including development plans, engineering reports, SOPs and work instructions
• Train and support production teams on assigned equipment and processes
• Support engineering changes, deviation processes, quality assurance and continuous improvement initiatives
• Ensure compliance with applicable EHS requirements and company standards

Required

• Bachelor's or master's degree in optics, physics, materials science, optical engineering, or a related technical field
• Professional hands-on experience in optical thin-film coating and related process engineering
• Strong knowledge of optical coating design, thin-film stacks and anti-reflection coating concepts
• Experience with coating equipment, vacuum systems and thin-film measurement or characterization tools
• Hands-on experience with ellipsometry and other relevant metrology methods
• Strong analytical, troubleshooting and problem-solving skills
• Ability to independently manage technical projects while collaborating effectively with multidisciplinary teams
• Willingness to work closely with production teams and provide hands-on on-site support
• Fluent English language skills, both written and spoken

Nice to have

• Experience with thin-film design and simulation software, preferably Macleod
• Experience with facet coating or passivation processes for laser diodes or other optoelectronic devices
• Knowledge of SPC, Design of Experiments (DoE) and statistical data analysis
• Experience with SEM, profilometry and advanced thin-film characterization
• Experience improving or automating coating and stacking equipment, including related hardware and software
• Experience transferring engineering processes into volume production
• German language skills are an advantage

• A permanent position in an innovative and international high-tech environment
• The opportunity to work at the forefront of photonics and semiconductor technology
• Hands-on responsibility for coating technologies and processes from development through industrialization
• Challenging projects with a high degree of technical ownership and room to contribute your own ideas
• Close collaboration with experienced colleagues across R&D, engineering, quality, and production
• Individual internal and external training and professional development opportunities
• Flexible working hours in a collaborative working environment
• 30 days of annual leave
• Attractive additional benefits, including company parking, company events, free beverages and fruit
• Gift vouchers for special occasions such as birthdays
• Additional benefits after successful completion of the probationary period, including commuting allowance, mobility support, meal subsidies and other attractive perks

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