Photonic Simulation & Design Engineer - (m/f/d)

Linq Photonics develops high-performance photonic integrated circuits based on thin-film lithium niobate (TFLN) and silicon nitride (SiN). Our focus is on electro-optic modulation for demanding applications in quantum technologies, optical communications, and advanced sensing. A core challenge we tackle is the co-design of photonic and RF structures for bandwidths beyond 25 GHz.

Role Description & Responsibilities

• Design and simulate high-speed electro-optic components (e.g. traveling-wave modulators)
• Perform detailed electromagnetic simulations and verification using Lumerical and/or Tidy3D for optical design
• Model RF behaviour (impedance matching, velocity matching, S-parameters)
• Develop parametric layouts using gdsfactory and characterize devices in the lab (EO-Response)
• Translate simulation results into fabrication-ready layouts and support tape-outs​
• Contribute to the strategic roadmap of our technology
• Participate in building the team, by attracting and selecting world-class quantum engineers to work with you.

Key Qualifications

• Master's or PhD in Photonics, RF Engineering, Electrical Engineering, or a related technical field
• Proven Experience in integrated photonics and high-frequency electronics design
• Proficiency in photonic simulation tools (Lumerical, Comsol and/or Tidy3D)
• Solid understanding of RF concepts (RF-loss, impedance matching)
• Experience with high-speed electro-optic devices and PIC layout design (ideally with gdsfactory or similar tools)
• Strong Python skills
• Fluency in English, German is a bonus

Preferred Qualifications

• Practical experience with high-speed measurement setups (VNA, RF probes, high-speed photodiodes)
• Experience with TFLN platforms, electro-optic modulation and packaging for high-speed devices
• Familiarity with RF simulation tools (HFSS, ADS, CST)

Who you are

• You are a builder. You are hands-on, enjoy discomfort and are not afraid to do things from scratch
• You deliver results with meticulous attention to details and a systematic approach to problem-solving
• You are autonomous, ambitious, organized, and enjoy driving a project
• You value transparency and open communication, collaborating and earning trust. 
• You are eager to learn and grow. You thrive in an environment of high expectations, pushing boundaries to achieve breakthroughs.

What we offer

• Experience with state-of-the-art high-speed photonic hardware
• Direct ownership of device concepts from simulation to measurement
• Fast iteration cycles between design, fabrication, and lab validation
• Highly technical startup environment with real impact
• Opportunity to shape core technology at Linq Photonics
• Welcoming and inclusive team environment in a fast paced start-up