About the Company

Do you dream of designing the photonic engines at the heart of tomorrow’s communication and quantum systems? At Lightium, we’re developing cutting-edge photonic integrated circuits (PICs) based on thin-film lithium niobate (TFLN) — and now we are expanding our platform with integrated III-V active devices.

About the Role

We are looking for a PIC Design Engineer with deep expertise in modeling and designing active photonic components to join us on this next milestone. We seek a PIC Designer with a strong focus on III-V-based active components, including lasers, semiconductor optical amplifiers (SOAs), and photodetectors. You will lead the simulation, design, and optimization of these devices, develop compact models for our process design kit (PDK), and support the integration of these elements into complete photonic circuits. Your work will directly shape the active device layer of our hybrid TFLN platform.

Responsibilities

What Our Ideal Candidate Brings

• Education & Experience: A PhD in III-V design or 3+ years of III-V work experience, including simulation softwares in the areas of photonics simulation (COMSOL or Lumerical) and band gap simulation (Silvaco, Photon Design, Ansys Semiconductor, etc.). Work experience in the PIC industry would be very positive.
• Additional Knowledge: Advanced experience with RF high speed (UTC detectors) and RF simulation tools (HFSS, CST, etc.). Experience with micro-transfer printing and coupon or tether design, photonic characterization and microfabrication.

What We Offer

A unique opportunity to lead a cutting-edge manufacturing initiative in the rapidly growing field of photonics. A collaborative and innovative work environment where your contributions will shape the future of telecommunications, datacom, and beyond. Competitive compensation and benefits package, including an employee stock option plan (ESOP) which reflects your experience and expertise. Home office possibility, generous vacation, full salary insurance under the Pillar 2 pension, and support of fair/conference attendance and continuing education. Become a key player in an early-phase startup and join a young, motivated, and energetic team. You will have the unique opportunity to create, grow, and develop your professional skills at a fast pace.

Equal Opportunity

We celebrate diversity and are committed to creating an inclusive environment for all employees. We'd love to hear from you if you're passionate about building new tech from the ground up and thrive in a collaborative and result-driven environment.