Computing Fellowship/Software Engineer


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

Diversity has been an integral part of CERN's mission since its foundation and is an established value of the organisation.


Job Description

The successful candidate will join the CERN OpenStack Team which operates the private cloud infrastructure provided by CERN IT to the experiments, users, and the administration of the organisation.

IP based Load Balancing as a Service (LBaaS) is the most recent offering of the cloud service and is the first feature to move to production from the ongoing work on Software Defined Networking (SDN). It offers a significant improvement over the DNS based load balancing previously available, and usage has grown quickly to a few hundred production instances, including some dependencies for critical services such as Cryo or Vaccuum.

This position will mainly involve:

  • Focusing on providing additional SDN functionality, which is currently in prototyping phase;
  • Offering private networks for improved isolation between workloads, security groups on all instances for improved access control, and IP mobility across OP services for improved user flexibility.

The project will be in close collaboration with the upstream communities we rely on, and as a shared effort between the cloud infrastructure and networking team.



Eligibility criteria

  • You are a national of a CERN Member or Associate Member State;
  • You have a Bachelor or Master’s degree in Computer Science, Engineering or other related field;
  • You have no more than 4 years’ experience after completing your highest diploma.

Essential skills and experience:

  • Experience of system administration under Linux;
  • Experience developing with Python.

Desired Skills and Experience:

  • Experience using of CI/CD tools, test automation and deployment;
  • Virtualisation, configuration and container technologies (Openstack, Puppet, Docker, Kubernetes);
  • Knowledge of networking technologies.


Additional Information

CERN would very much like to benefit from your expertise, commitment and passion. 

In return, CERN will provide you with:

  • An employment contract for between 6 months (minimum) up to 24 months, with a possible extension up to 36 months.
  • A stipend ranging from 5,321 to 6,606 Swiss Francs per month (net of tax).
  • Coverage by CERN’s comprehensive health scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
  • Depending on your individual circumstances: an installation grant, family, child and infant allowances as well as travel expenses to and from Geneva.
  • 2.5 days of paid leave per month.

Your Life @CERN

Get a glimpse of what it’s like to work at CERN: and

How to Apply:

You will need the following documents to complete your application:

  • A CV
  • A scanned PDF of your most recent relevant qualification

Optionally, we recommend that you add two recent letters of recommendation, giving an overview of your academic and/or professional achievements. You can upload these letters at the time of application if you have them to hand. You will also be provided with a link as soon as you have submitted your application to forward to your referees to upload their letters confidentially. Please note this must be done before the closing date.

All applications should reach us no later than 19 July 2022.