CVAT (Computer Vision Annotation Tool) is the leading open-source data annotation platform, trusted by 250k+ teams and researchers worldwide. We’re looking for a Senior Python Developer to own the design, development, and documentation of our Python SDK and APIs. This role sits at the intersection of backend engineering, SDK/library design, and developer experience. In addition to shaping the high-level SDK and writing tutorials that make CVAT straightforward to extend and integrate, you’ll ensure our APIs are consistent, versioned, easy to use, and well-documented.

What You’ll Be Doing

• Maintain and evolve the server HTTP API, ensuring stability, backward compatibility, and versioning.
• Maintain and extend the existing Python SDK, including a Python package and a command-line tool.
• Support automatically generated low-level SDKs.
• Design and develop high-level SDK abstractions to cover common workflows (xe.g., task creation, automated quality assurance, progress tracking).
• Write clear developer documentation across all three levels: HTTP API, Python SDK, CLI.
• Create runnable tutorials, integration examples, and automation scripts.
• Improve the server API and SDK to enhance user experience and enable more efficient workflows.
• Support and improve CI/CD pipelines for SDK releases (testing, packaging, publishing to PyPI).
• Ensure the SDK behaves correctly on all supported platforms, including Linux, MacOS, and Windows.
• Engage with the open-source community by triaging issues, reviewing PRs, and collecting feedback.

What We Expect from You

• Proven experience developing Python SDKs/libraries (with public repositories or PyPI packages).
• Strong understanding of HTTP APIs, OpenAPI/Swagger, auth flows, and versioning strategies.
• Experience with Python packaging and tooling system (PyPI, setuptools, pip, poetry, pip-tools, virtual environments)