Python Software Engineer

As a Python Software Engineer at CERN, you will develop and maintain Python APIs and PyQt6-based desktop applications integral to the accelerator control system. The role involves designing robust client-oriented APIs, building reusable components, and collaborating across teams to support CERN's accelerator operations and engineering.

Responsibilities

• Design and maintain Python bindings to the accelerator control system, using technologies such as REST, gRPC, event-driven messaging (e.g. ZMQ), and bindings to existing C++ and Java libraries.
• Build reusable components, widgets, and libraries supporting control application development at CERN.
• Develop and maintain PyQt-based control applications used in the CERN Control Centre.
• Contribute to the selection and configuration of a coherent DevOps toolchain for Python, covering dependency management, packaging, testing, CI/CD, and deployment monitoring.
• Collaborate with user communities to establish and document best practices for developing Python-based control applications.
• Contribute relevant developments back to the open source community.
• Take ownership of key systems or tools, driving their evolution through active engagement with stakeholders and structured follow-through.
• Mentor junior engineers, sharing knowledge and supporting their growth.

Requirements

• Master's Degree or equivalent relevant experience in the field of Computer Science or a related field.
• Extensive experience with Python, including typed Python and asynchronous programming patterns.
• Advanced knowledge of API and application design, with proven experience designing and evolving client-oriented APIs and SDKs.
• Solid grasp of platform engineering principles and modern software engineering practices, including quality assurance and DevOps.
• Knowledge of Qt and its Python bindings (PyQt or PySide) is a plus; willingness to learn is equally valued.
• Experience in UI design with a strong focus on usability and developer experience is desirable.
• Comfortable working across a broad and evolving technology landscape, with the curiosity and initiative to develop new expertise as the role demands.

Skills

• Python Programming
• Typed Python
• Asynchronous Programming
• API Architecture
• SDK Development
• Platform Engineering
• Software Engineering Practices
• Quality Assurance
• DevOps Automation
• Qt
• PyQt
• PySide
• UI Design
• Usability Engineering
• Developer Experience

Languages

English, French