Python Packaging Engineer — Dependency Upgrades & CI

MSRcosmos LLC; New Jersey; On-site; USD 110,000 - 150,000; Full time

Job summary

MSRcosmos LLC is seeking a Python Developer to onsite at multiple U.S. locations including Edison NJ, Frisco TX, Hartford CT and Bellevue WA.

You will upgrade and integrate third‑party Python packages, resolve packaging compatibility, and fix automated test failures. Responsibilities include updating metadata, build configurations, and diagnosing CI presubmit issues, while maintaining thorough documentation.

Qualifications

• Strong Python development and debugging.
• pip, PyPI wheels, virtual environments and Python packaging.
• pytest or equivalent testing frameworks.
• Dependency resolution and version compatibility experience.
• Git, Linux scripting, CI/CD and log analysis.
• Experience maintaining or integrating opensource packages.
• Preferred setuptools, Poetry, native C extension builds, Bazel, Copybara, monorepos, security remediation.

Responsibilities

• Upgrade Python packages across supported runtime versions.
• Resolve dependency API import packaging and test failures.
• Update package metadata and internal build configuration.
• Reconcile local patches and diagnose CI presubmit failures.
• Validate upgrades and maintain technical documentation.

Skills

Python development

Python packaging

pytest

Dependency management

Git

CI/CD

Open-source packages

Log analysis

Scripting

Security remediation

Tools

pip

PyPI wheels

virtual environments

setuptools

Poetry

Bazel

Copybara

Job description

MSRcosmos LLC is seeking a Python Developer to onsite at multiple U.S. locations including Edison NJ, Frisco TX, Hartford CT and Bellevue WA.

You will upgrade and integrate third‑party Python packages, resolve packaging compatibility, and fix automated test failures. Responsibilities include updating metadata, build configurations, and diagnosing CI presubmit issues, while maintaining thorough documentation.