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Digital/mixed signal design engineer (SY-RF-FBM-2023-148-LD)

Geneva, Switzerland
Posting live until
12 Dec 2023

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Job Details

Company Description

At CERN, the European Organization for Nuclear Research, physicists and engineers are probing the fundamental structure of the universe. Using the world's largest and most complex scientific instruments, they study the basic constituents of matter - fundamental particles that are made to collide together at close to the speed of light. The process gives physicists clues about how particles interact, and provides insights into the fundamental laws of nature. Find out more on

Job Description


Are you an engineer in digital mixed signal ready to lead activities focusing on verifying and testing digital and mixed-signal designs? Do you love creating solutions to highly complex challenges? Do you intrinsically see the importance in every detail? CERN, take part!

You will join the Accelerator Systems Department  which is responsible for the beam-related technical systems of the CERN accelerators. The SY teams design, build and operate equipment systems in all CERN accelerators, and are engaged in ambitious forward-looking R&D programmes.

You will join the group responsible for the design and operation of the low-level radio-frequency (LLRF) systems for the whole accelerator chain – from the smallest linacs to the Large Hadron Collider.


As a member of the team, you will design, produce, install, commission and daily operate the LLRF systems in the existing accelerators and participate in developments for the future systems and machines. These mixed signal systems include high performance programmable logic devices (FPGA) and RF system on chip devices (RF SoC), signal conversion (ADCs and DACs up to Gsps), digital signal processing of radio-frequency signals and sophisticated feedback loops, high speed digital communication links, radio-frequency front ends (amplifiers, filters, mixers, up to 1 GHz) and more.  

Important proportion of our duties represents assuring smooth and reliable, 24/7 operation for these systems (existing and future) and their continuous performance improvements.

In addition, you will:

  • Participate in the design and specification of radio-frequency systems and sub-systems for particle accelerators;
  • Design mixed signal electronic modules/systems containing a high performance SoC and RF SoC devices (Xilinx), large digital processing part, RF front-end interface and signal distribution;
  • Develop firmware to implement the required functionality and signal processing in FPGAs;
  • Steer the development of software scripts with Python or Matlab for hardware tests and setting up;
  • Develop and implement techniques to test the systems and evaluate their RF performance on the test bed and when installed in the accelerators (e.g. jitter, noise, stability, drifts);
  • Coordinate the procurement of parts and production of modules, either with industry, or using the in-house services;
  • Produce and manage the associated technical documentation;
  • As an equipment specialist, follow-up the daily operation, recommissioning of the systems after technical stops, define and follow-up the required maintenance and upgrades, provide support on beam tests and measurements;
  • Participate in the stand-by duty and interventions on LLRF systems;
  • Provide supervision to students/graduates.


Master's degree or equivalent relevant experience in the field of electronics engineering, electrical engineering or a related field.


Required experience:

  • Demonstrated experience in the design and development of electronic modules with focus on digital and mixed signal systems based on programmable logic devices;
  • Demonstrated experience in design and development using System on Chip, or RF System on Chip devices;
  • Experience in interfacing programmable logic devices with peripherals using high speed digital links;
  • Experience in production of electronic modules by industry;
  • Experience with scripting languages such as Python or Matlab.

Desired experience:

  • Existing experience with Xilinx devices and toolchain (including System generator, HLS);
  • Design and simulation of digital control loops and feedback systems;
  • Experience in the field of analogue and high-frequency electronics and designs;
  • Testing and measurement of electronic circuits, modules and systems;
  • Use of modern test instruments (high-end digital oscilloscopes, signal and protocol analysers, RF instrumentation).

Technical competencies:

  • Design and simulation of FPGA-based electronics;
  • Knowledge and application of high-level description languages and tools: (VHDL);
  • Testing and measurement of digital electronic circuits;
  • Testing and measurement of analog electronic circuits;
  • Assembly of electronic components: and modules;
  • Contract management.

Behavioural competencies:

  • Solving problems: identifying, defining and assessing problems, taking action to address them; producing workable and timely solutions that meet requirements;
  • Working in teams: working well in groups and readily fitting into a team; participating fully and taking an active role in team activities; building and maintaining constructive and effective work relationships;
  • Managing self: working well autonomously; taking on activities and tasks without prompting; remaining objective, focused and productive in a stressful environment; focusing on solutions rather than problems;
  • Achieving results: following through on new ideas and innovations; planning and implementing application; having a structured and organised approach towards work; being able to set priorities and plan tasks with results in mind;
  • Communicating effectively: ensuring that information, procedures and decisions are appropriately documented; expressing opinions, ideas and suggestions with conviction and in a logical/structured manner; keeping to the point.

Language skills:

Spoken and written English or French: ability to understand and speak the other language in professional contexts. Ability to draw-up technical specifications and/or scientific reports and to make oral presentations in at least one of the two languages.

Additional Information

Eligibility and closing date:

Diversity  has been an integral part of CERN's mission since its foundation and is an established value of the Organization. Employing a diverse workforce is central to our success. We welcome applications from all Member States 

This vacancy will be filled as soon as possible, and applications should normally reach us no later than 12.12.2023 midday.

Employment Conditions

Contract type: Limited duration contract (5 years). Subject to certain conditions, holders of limited-duration contracts may apply for an indefinite position.

These functions require:

  • Participation in a regular stand-by duty, including nights, Sundays and official holidays;
  • Work in Radiation Areas;
  • Interventions in underground installations;
  • A valid driving licence;
  • Shift work, when required by the needs of the Organization.

Job grade: 6-7

Job reference: SY-RF-FBM-2023-148-LD

Benchmark Job Title: Electronics Engineer


CERN profileAt CERN, physicists and engineers use the world’s largest and most complex scientific instruments to study the basic constituents of matter – the fundamental particles – to probe the underlying structure of the universe.

Working at CERN
CERN is a truly unique organization. A genuine collaboration between countries, universities and scientists, driven not by profit margins, but by a commitment to create and share knowledge. At CERN, students, recent graduates and experienced professionals work together to push for immense scientific discoveries, answering some of life’s most complex questions and advancing the boundaries of human knowledge.

People are free to work creatively and to trust in, and rely on, their colleagues across the organization. History is being made at CERN – and the excitement is tangible, inspiring, overwhelming at times. It is the only place in the world that you can do this work in this way.

Why work for us
Today, CERN employs more than 2500 people, and if you visit us you will find more than 2500 different reasons why CERN is such a great place to work. Six key reasons that we believe will make you love working here are: challenge; purpose; imagination; integrity; collaboration; and quality of life.

Student and graduate schemes
CERN technical and administrative internships and graduate schemes offer international students and recent graduates the opportunity to work with world-class scientists and engineers on cutting-edge research in particle physics, computational science, life sciences, engineering, international relations, and more. Whichever route you take, it will be an extraordinary experience.

What we are looking for
To conduct experiments of this scale and importance, CERN needs people from various career levels and with a wide range of abilities, skills and competencies. We have job opportunities for students, graduates and experienced professionals, from apprenticeships to PhDs (and beyond). Whatever your background, field of interest or diploma level, CERN could be the place for you.

Geneva, Switzerland

Number of employees
2500+ staff members; several hundred on graduate and student programmes

Positions recently recruited for
Computing engineer, radiofrequency engineer, process operator in cryogenics, web developer, mechanical engineer, administrative assistant, system administrator, power electronics engineer, scientific writer, applied physicist and many more

Desired degree disciplines/class
From apprenticeship to PhD in a wide variety of domains

How to apply
Apply online at

Closing date
All year round

Tel +41 22 76 63 786

Company info
+41 22 76 63 786
Esplanade des Particules 1
PO Box 1211
Geneva 23

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