Python Software Engineer – API & PyQt6 Development

About the role

CERN is seeking a Python Software Engineer with a strong interest in API development and desktop application engineering using PyQt6. You will work on critical tools that support the accelerator complex, serving operations, engineering, and physics teams daily.

Key responsibilities

• Design and maintain Python bindings to the accelerator control system using REST, gRPC, ZeroMQ, and existing C++/Java libraries.
• Develop reusable PyQt6 widgets and libraries for control applications used in the CERN Control Centre.
• Define and configure a coherent DevOps toolchain for Python, covering dependency management, packaging, testing, CI/CD, and deployment monitoring.
• Collaborate with user communities to document best practices for Python‑based control applications.
• Contribute relevant developments back to the open‑source community.
• Mentor junior engineers and take ownership of key systems or tools.

Required profile

• Master's degree or equivalent experience in Computer Science or a related field.
• Extensive experience with Python, including type‑hinted code and asynchronous programming patterns.
• Proven ability to design client‑oriented APIs and SDKs.
• Solid understanding of platform engineering principles.

Required skills

• Python (typed, async)
• PyQt6
• REST
• gRPC
• ZeroMQ (ZMQ)
• C++ and Java interoperability
• DevOps tooling (dependency management, packaging, testing, CI/CD, deployment monitoring)