Lead Python Developer (Fintech)

Quick Facts

• Role: Lead Python Developer (Fintech)

Description

You will lead Python-based data processing workflows and support deployment pipelines for large-scale trading and reconciliation datasets. The role combines Python and advanced SQL work with Git-based collaboration, CI/CD build/test/deploy/rollback tasks, and detailed data reconciliation across multiple sources. Work hours extend to 8–9 PM.

Responsibilities

• Build data processing workflows in Python while managing virtual environments

• Craft and fine-tune SQL queries for trading databases

• Collaborate using Git (branching, Pull Requests, code review)

• Support CI/CD pipeline tasks including builds, testing, deployments, and rollbacks

• Analyze large and complex datasets (e.g., loan-level tapes and model outputs)

• Reconcile results from multiple sources and investigate discrepancies

• Document and clarify variances found during reconciliation

Requirements

• 7+ years of Python Developer experience

• Strong Python, Pandas, and NumPy

• Experience with conda, poetry, and uv for package and virtual environment management

• Expertise in writing and refining SQL queries

• Experience with large unstructured datasets (loan-level tapes, model outputs)

• Ability to reconcile two result sets and explain the reasoning behind differences

• Hands-on Git experience with branching, Pull Requests, and code review

• English proficiency at B2+ level or higher

Benefits

• Hybrid-by-design mode with opportunity to work remotely within Poland

• Chance to work abroad up to 60 days annually and business-driven relocation opportunities

• Career development programs, mentoring, and soft skills/well-being programs

• Certifications (Anthropic, Gemini, GCP, Azure, AWS) and English classes

• Stable pay and participation in an Employee Stock Purchase Plan with a 15% discount

• Health insurance, multisport, shopping vouchers

• Referral bonuses up to $2,000

• Social and well-being events; office areas with entertainment and relaxation

• Benefits available to employees only; B2B contractor terms are agreed individually