Silicon photonics characterisation and design engineer (ep-ese-be-2026-109-grap)

Silicon Photonics Characterisation and Design Engineer (EP-ESE-BE-2026-109-GRAP)

Join CERN's detector R&D program for future high-energy physics experiments, working on advanced optical communication technologies for next-generation particle detectors. In this role, you will contribute to the development of radiation-tolerant Silicon Photonics components for high-speed data transmission in challenging environments. Your work will include hands‑on laboratory characterisation of Silicon Photonics circuits and the design of innovative photonic devices. This position offers the opportunity to work at the intersection of photonics, electronics, and particle detection technologies.

• Contribute to the electro-optical characterisation of custom-designed photonic integrated circuits (PICs).
• Validate the PIC measurement results against optical simulations.
• Support the integration and evaluation of PICs with particle readout chips (ROCs).
• Prototype and demonstrate coarse wavelength-division multiplexing (CWDM) data-transmission systems.
• Characterise and benchmark different data-link architectures.
• Simulate and design a new generation of test PICs based on measurement results from existing PICs.
• Present the progress to project meetings and conferences.
• Document measurement and simulation results and methods.

• Proven experience in design and simulation of photonic components and integrated photonic circuits.
• Experience in laboratory characterisation of optical and photonic components using OSAs, tunable lasers, and power meters.
• Proven experience in high‑speed electro‑optical measurements utilising pattern generators, oscilloscopes, error detectors, VNAs, and spectrum analysers.
• Hands‑on experience in automation of measurement setups for opto-electronic devices.
• Extended experience in analysis and interpretation of experimental and measurement data.

• Expert user of photonic simulation tools (e.g., Ansys Lumerical, Synopsys RSoft).
• Proficient user of electronic and optical laboratory instrumentation, including high‑speed measurement techniques.
• Expert user of C-based programming languages or Python.
• Expert in data analysis and visualisation using Python, MATLAB, or equivalent.
• Familiar with Linux-based development environments.
• Spoken and written English, with a commitment to learn French.
• You have a professional background in Electronic Engineering or Physics (or a related field) and have either:
  • a Master's degree with 2 to 6 years of post-graduation professional experience;
  • or a PhD with no more than 3 years of post-graduation professional experience.
• You have never had a CERN fellow or graduate contract before.

Contract duration: 24 months, with a possible extension up to 36 months maximum.

Working hours: 40 hours per week

Job flexibility: Fully Onsite

This position involves:

• Work during nights, Sundays and official holidays.
• Work in Radiation Areas.

Job reference: EP-ESE-BE-2026-109-GRAP

Field of work: Electrical or Electronics Engineering

Benchmark job: 200050 - Electronics Engineer

• A monthly stipend between 6372-7004 Swiss Francs per month (tax free) depending on your degree.
• 30 days of paid leave per year plus 2 weeks annual closure.
• Coverage by CERN’s comprehensive health insurance scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
• Family, child and infant monthly allowances depending on your individual circumstances.
• A relocation package (installation grant and travel expenses) depending on your individual circumstances.
• Possibility to extend your contract up to 36 months.
• On-the-job and formal training including language classes.