Software Engineer (Python) (OSI-SIS-TS-2026-185-LD)

CERN; Deutschland; Hybrid; EUR 117.000 - 159.000; Vollzeit

Benefits dieser Stelle

30 days paid leave plus 2 weeks annual

Health insurance

CERN Pension Fund

Family allowances

Zusammenfassung

CERN's Scientific Information Service invites a Computing Engineer to design, develop, and operate backend applications, APIs, and data processing workflows using Python and Django. You will contribute to INSPIRE, SCOAP³, CERN Analysis Preservation and HEPData, collaborating with information specialists and software engineers.

You will help bring machine learning capabilities to production systems, exploring Model Context Protocol and LLM-based applications, while maintaining code quality

Qualifikationen

• Master's degree in Computer Science or related field or equivalent experience.
• Strong experience with Python and backend engineering (Django or similar).
• Experience with data-intensive applications and API design.
• Familiarity with ML/AI techniques and production integration.
• Knowledge of relational databases and modern development practices.

Aufgaben

• Develop, maintain, and operate backend applications, APIs, and data workflows.
• Integrate ML/AI capabilities into production systems.
• Evaluate emerging AI technologies and apply to use cases.
• Ensure software quality with automated testing, code reviews, and CI/CD.
• Collaborate with engineers, product owners, and information specialists.

Kenntnisse

Python

Django

API design

Relational databases

CI/CD

Airflow

React

TypeScript

OpenSearch/ Elasticsearch

LLM technologies

Model Context Protocol

Ausbildung

Master's degree in Computer Science

Tools

Apache Airflow

React

TypeScript

OpenSearch

Elasticsearch

LLM tool integration

Jobbeschreibung

Introduction

Join CERN's Scientific Information Service, as part of the OSI Department ,and contribute to the development of platforms such as INSPIRE, SCOAP³, CERN Analysis Preservation and HEPData, used by researchers and scientific communities worldwide. You will design, develop, and operate backend applications, APIs, integrations, and data processing workflows, working primarily with Python and Django.

You will also help bring machine learning and emerging AI capabilities to these platforms, including information extraction, classification, matching, recommendation, semantic search, RAG, and LLM-based applications. You will explore new ways of connecting scientific information platforms, including technologies such as the Model Context Protocol, with a focus on production systems rather than fundamental ML research.

Functions

• Develop, maintain, and operate scientific information applications using Python and Django, including APIs, data models, integrations, and data processing workflows.
• Integrate machine learning and AI capabilities into production systems, using technologies such as Large Language Models, retrieval-augmented generation, semantic search, and the Model Context Protocol.
• Evaluate emerging AI technologies and apply them to concrete scientific information use cases.
• Ensure software quality through automated testing, code review, monitoring, and continuous integration.
• Collaborate with software engineers, product owners, and information specialists on technical solutions and architecture.

Master's degree or equivalent relevant experience in the field of Computer Science or a related field.

Experience:

• Strong professional experience in Python and software engineering, including backend development with Django or a comparable Python framework, API design, relational databases, and maintainable production software.
• Experience with data-intensive applications or data processing workflows.
• Good understanding of modern Large Language Model technologies and their integration into software systems.
• Experience with Apache Airflow, React and TypeScript, OpenSearch or Elasticsearch would be an asset.
• Experience with LLM applications, retrieval-augmented generation, embeddings, semantic search, Model Context Protocol, tool calling, or AI agent integrations would also be an asset.

Technical competencies:

• Development of application software,design, development and maintenance of production software applications, APIs and data processing workflows using Python and Django.
• Knowledge of programming techniques and languages,strong knowledge of Python, software engineering principles, API development, relational databases and modern development practices.
• Architecture and design of ICT systems,designing maintainable and scalable software architectures, integrations and data intensive applications.
• Testing, diagnosing and optimisation of software,applying automated testing, monitoring, debugging, performance analysis, and continuous integration to ensure software quality and reliability.

Behavioural competencies:

• Achieving Results: delivering high quality work on time and fulfilling expectations.
• Solving Problems: identifying, defining and assessing problems, taking action to address them.
• Learning and Sharing Knowledge: keeping up-to-date with developments in own field of expertise and readily absorbing new information.
• Working in Teams: supporting and acting in accordance with team decisions; accepting joint responsibility for team successes and shortcomings.
• Communicating Effectively: demonstrating a pro-active approach to resolving differences; addressing issues of conflict constructively.

Language skills:

Spoken and written English, with a commitment to learn French.

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 and Associate Member States .

This vacancy will be filled as soon as possible, and applications should normally reach us no later than 28.09.2026 at 23:59 CEST .

Employment Conditions

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

Working Hours: 40 hours per week

Job Flexibility: Hybrid

Job grade: 6-7

Job reference: OSI-SIS-TS-2026-185-LD

Field of work: Information Technologies

Benchmark Job Title: Computing Engineer

Global Benefits

• A competitive salary (tax free), increasing in line with your years of relevant experience.
• 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