We are looking for a Photonic Simulation & Design Engineer with a strong understanding of high-speed electro-optic devices. You will work on the full development cycle of high-bandwidth modulators and related components, from electromagnetic simulation to layout and experimental validation.

Firmenname

Linq Photonics
Tiergartenstraße 15
69121 Heidelberg
Corporate Website

Arbeitsort

Heidelberg

Veröffentlicht

05. Mai 2026

Bewerbungsschluss

06. August 2026

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

CV and cover letter are optional.