Research

Backend Software Developer (Java/Python) - European Organization for Nuclear Research (Geneva)

European Organization for Nuclear Research CERN Geneva, Switzerland
Contract Type Other

Position details

Reference
BE-CSS-DSP-2026-151-GRAE
Last Verified
19 June 2026

Position overview

This is the official EU Careers listing for Backend Software Developer (Java/Python) at CERN based in Geneva (Other). The vacancy reference is BE-CSS-DSP-2026-151-GRAE. The role falls under the Research domain.

Full responsibilities, eligibility criteria, language requirements, and the selection procedure are set out in the official vacancy notice.

  • Contract type: Other
  • Duty station: Geneva
  • Domain: Research
  • Vacancy reference: BE-CSS-DSP-2026-151-GRAE

Application timeline

This vacancy was first listed on 28 May 2026, 26 days ago.

No closing date is published in the source feed for this position. EU vacancies typically remain open for four to eight weeks; check the official vacancy notice for the cut-off date and time.

Last verified against the EU Careers feed on 19 June 2026 (5 days ago).

Where to learn more

For headcount, mission, and other open vacancies at CERN see the CERN institution page; for the cost of living, correction coefficient, and other postings in Geneva see our Geneva location page; for related vacancies in the Research field browse our Research domain page.

New to EU careers? Our beginner's guide walks through entry routes, EPSO competitions, and what to prepare. For application logistics see application tips and EPSO competitions.

Career trajectory

Career progression for this grade staff is governed by Articles 44 to 46 of the Staff Regulations (consolidated text on EUR-Lex) and Annex IB on the promotion procedure. Step increases are automatic every two years (Art. 44); grade promotion is competitive, based on the appraisal exercise (Art. 45) and the Career Development Review. For roles at CERN, progression to the next grade typically takes three to five years on merit, with two-yearly step increases in between. Article 46 governs the classification at recruitment, which sets the starting step within the grade (usually step 1 for external recruits without prior EU service, step 2 or 3 where relevant professional experience is recognised).
Mobility within the institutions is encouraged via the inter-institutional and intra-institutional vacancy publication system: temporary agents who pass the probation period and reservists from EPSO laureate lists can typically apply to internal vacancies after one year of service. Lateral moves between Directorates-General reset the seniority clock for promotion only if the new post carries a different grade.

Language profile

Beyond the formal language requirements stated in the vacancy notice, the day-to-day working languages at this employer are English and French in roughly equal measure, with German appearing in some technical files. Internal meetings and most policy drafting in Brussels run in English; French remains the preferred internal language in Luxembourg-based services and parts of DG TRADE.

Application cadence

CERN has not advertised another comparable role with the same grade and Research signature in the past twenty-four months. This opening has rarely been seen on the EU Careers feed and may be the first such posting in our two-year window. Applicants who pass the eligibility checks should not assume the same profile will reopen on a predictable cadence.

Visit the official European Organization for Nuclear Research website

Apply on EU Careers

Source: This job listing was sourced from the official EU Careers portal (EPSO). First published: .

From the EU Jobs Alert guide How to land a job at the EU institutions A walkthrough of EPSO competitions, agency calls, and contract roles, written by our editor. Read the guide →

Similar Opportunities

Non-Member State Postdoc Fellowship Programme (Theoretical Physics)

CERN

Geneva

Short Term Internship 2026

CERN

Geneva

Early Career Professionals - Technical Field – Spontaneous Applications

CERN

Geneva
More jobs at CERN More jobs in Geneva
Remove ads and unlock all features Go Premium