Computing Fellowship: Frontend Web Developer

  • Geneva, Switzerland
  • Full-time

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 Organization.

CERN’s computing fellowships are designed for recent graduates offering career development in a unique, international environment.

Job Description

Are you talented in designing intuitive web interfaces? Do you feel confident in writing efficient, well-documented, and modular JavaScript code? Do you keep yourself up to date with new technologies in your field? Then join CERN’s Electrical Power Converters Group! We are seeking a frontend developer to work on web applications used by power converter experts, to work with a large distributed control system consisting of more than five thousand power converter controllers. These are used to precisely control the current delivered to the magnets in CERN’s accelerator complex in order to guide and focus particle beams.

You will join the Converter Controls Software Section and enjoy creating and extending the user interfaces of the group’s expert tools in close collaboration with users and other team members.

As part of an agile team, you will collaborate closely with four developers who are working on the full stack of the group’s expert tools.

You will contribute to the design, development, deployment, maintenance, and support of existing and new web applications and services.

You will become the main responsible for a selected subset of existing web applications such as the signal visualisation and inspection tool PowerSpy. This role mainly comes with frontend related tasks but it will also require you to become familiar with and work on the Python backends.

On the frontend, we use mostly:

  • JavaScript (ES6+)
  • Vue.js
  • Bootstrap 5

On the backend, we use:

  • Python
  • FastAPI, Django and REST APIs
  • PostgreSQL and Oracle

Section wide, we use:

  • Git for version control
  • Gitlab CI/CD for continuous integration
  • Jira and Gitlab for issue tracking
  • Confluence for wiki articles

Additionally, you will be part of a support team that is responsible for tasks such as helping power converter experts to insert definition and configuration data into our system. Approximately every three months, you will be on stand-by duty for one week including nights, weekends and public holidays.


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 fields;
  • You have no more than 4 years’ experience after completing your highest diploma.

Essential skills and experience

  • Experience in developing responsive single page applications using: JavaScript (ES6+), HTML5, and CSS (CSS3, SCSS);
  • Experience in building and deploying web applications with: The Node toolchain (Node.js, npm, webpack and babel);
  • Experience in working with WebSockets;
  • Knowledge of the Python programming language.

Desired skills and experience

  • Experience in developing with frontend frameworks such as Vue.js and Bootstrap;
  • Experience in developing and working with REST APIs (including CORS knowledge);
  • Knowledge of JSDoc;
  • Knowledge of frontend testing tools such as Puppeteer and Mocha;
  • Knowledge of Python web frameworks such as FastAPI or Django.

Please note that CERN Staff members are not eligible to apply for a Fellowship.

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

We recommend to 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.

All applications should reach us no later than 31 March 2022 at noon.

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