Senior Python Developer

Location: Remote Worldwide or Cyprus

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.
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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)

• Ability to design libraries (ideally with public usage/adoption).

• Experience writing developer documentation and tutorials (docs-as-code, Sphinx/Markdown).

• Strong Git/GitHub workflow experience (PR reviews, CI/CD).

• Experience with major platforms (Windows, Linux, MacOS)

• English proficiency (written & spoken, minimum B2).
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Nice to have

• Experience with JavaScript SDKs.

• Contributions to open-source SDKs.

• Familiarity with computer vision / machine learning developer tooling (e.g., DVC, FiftyOne, Datumaro).

• Experience with unit testing (unittest, pytest).

• Experience with debugging tools.

• Passion for using AI to accelerate your work.
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Why Join

• Be part of a team passionate about computer vision and open-source

• Career development opportunities

• Flexible work schedule with the freedom to work remotely from any location

• A healthy work-life balance supported by generous vacation and sick leave policies

• Medical insurance and benefits

• Engage with a global developer community on impactful projects