Lead Python Developer (Fintech)

We're looking to add a Lead Python Developer (Fintech) to our team—someone with solid technical expertise in building applications and managing deployment pipelines, particularly for large-scale systems and trading databases. Please note that work hours extend to 8–9 PM. Responsibilities Build data processing workflows leveraging Python while managing virtual environments Craft and fine-tune SQL queries designed for trading databases Work collaboratively through Git, covering branching, Pull Request creation, and code review processes Engage in CI/CD pipeline tasks, encompassing builds, testing, deployments, and rollbacks as necessary Examine large and intricate datasets, including loan-level tapes and model outputs Cross-check results originating from multiple sources and probe into any discrepancies found Document and clarify variances identified throughout data reconciliation work Requirements A minimum of 7 years working as a Python Developer Strong command of Python, Pandas, and NumPy Adaptability in using conda, poetry, and uv for managing packages and virtual environments Expertise in crafting and refining SQL queries Experience handling large, unstructured datasets such as loan-level tapes and model outputs Ability to reconcile two sets of results and articulate the reasoning behind differences Hands-on experience with Git, including branching, Pull Requests, and code review practices English proficiency at a B2+ level or higher Nice to have Familiarity with SQL Server/T-SQL Comfort working with Linux command line, SSH, and hybrid Windows/Linux file shares (SMB/NFS) Knowledge of how CI/CD pipelines operate, including builds, testing, deployment, and rollback procedures Foundational understanding of fixed income concepts: price/yield relationships, duration and convexity, spread types (OAS, Z spread), the distinction between coupon and yield, and accrued interest