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Senior Python Core Engineer (Client SDK) at ClearML. About the company. At ClearML, our mission is to make infrastructure management effortless across every phase of. the AI lifecycle -- from building and training AI models to large-scale production. Trusted by. more than 2,000 organizations, AI builders and IT teams use our AI infrastructure platform to. power everything from early-stage R&D to mission-critical public sector and enterprise-grade AI. pipelines.. We’re growing quickly and looking for curious, self-driven individuals who are excited to shape. the future of AI and the infrastructure that powers it. Our customers are tackling some of the. world’s most important challenges -- revolutionizing healthcare, discovering new medicines,. securing global finance, protecting national security, and preserving our planet’s ecosystems.. About the Role. At ClearML, our SDK is the bridge between data scientists and our infrastructure. We are. seeking a Senior Python Engineer to work on the client-side clearml open-source library. This. is not a standard backend role; you won't be tuning databases. Instead, you will be building the. "magic" that allows ClearML to automatically track experiments, creating wheels for PyPI, and. ensuring our code runs smoothly in diverse user environments.. You will dive deep into Python internals and build integrations with the latest AI frameworks. (PyTorch, TensorFlow, vLLM, etc.). If you love metaprogramming, understanding how imports. work under the hood, and packaging libraries for thousands of users, this role is for you.. Responsibilities. ● Core SDK Development: Design and maintain the client-side Python SDK, ensuring. high performance and backward compatibility across Python versions.. ● Automatic Instrumentation: Develop logic to automatically capture code execution,. parameters, and metrics using advanced Python techniques (monkey patching,. decorators, introspection).. ● ML Framework Integration: Build and maintain deep integrations with leading AI. libraries (PyTorch, TensorFlow, Keras, Hugging Face, vLLM, scikit-learn).. ● Packaging & Distribution: Manage the build lifecycle, creating and optimizing Python. wheels and Eggs, and managing releases to PyPI and Conda.. ● Cross-Platform Reliability: Ensure the SDK functions seamlessly across Linux,. macOS, and Windows environments.. ● Debug User Environments: Troubleshoot complex client-side issues related to. multiprocessing, serialization (pickle/dill), and memory management.. Requirements. ● 8+ years of professional software development experience.. ● Deep Python Expertise: You understand metaclasses, descriptors, and how Python. handles imports and memory.. ● Packaging Experience: Proven experience building and packaging Python libraries. (setup.py, poetry, building wheels) and publishing to public repositories (PyPI).. ● Runtime Modification: Strong familiarity with monkey patching, AST manipulation, or. writing custom import hooks.. ● AI Ecosystem Knowledge: Familiarity with the internals of frameworks like PyTorch,. TensorFlow, or vLLM, llama.cpp.. ● Collaboration: Experience working in a remote, distributed team and contributing to. code reviews.. ● Excellent communication skills and ability to work independently or as part of a team.. Company Location: Spain.