Lead Python Developer (Fintech)

Quick Facts

• Role focuses on large-scale data processing and trading databases
• Work hours extend to 8–9 PM

Description

Build Python data processing workflows and SQL optimized for trading databases. Manage environments, reconcile discrepancies across multiple data sources, and support CI/CD pipeline tasks for builds, testing, deployments, and rollbacks. Collaborate via Git with branching, Pull Requests, and code reviews.

Responsibilities

• Build data processing workflows in Python while managing virtual environments
• Craft and fine-tune SQL queries for trading databases
• Use Git for branching, Pull Requests, and code reviews
• Execute CI/CD pipeline activities including builds, testing, deployments, and rollbacks
• Analyze large, complex datasets such as loan-level tapes and model outputs
• Cross-check results from multiple sources and investigate discrepancies
• Document and clarify variances found during data reconciliation

Requirements

• 7+ years working as a Python Developer
• Strong Python, Pandas, and NumPy
• Experience with conda, poetry, and uv for packages and virtual environments
• Expertise in writing and refining SQL queries
• Experience with large unstructured datasets (loan-level tapes, model outputs)
• Ability to reconcile two sets of results and explain differences
• Hands-on Git experience (branching, Pull Requests, code review)
• English proficiency at B2+ level

Benefits

• Hybrid work within Poland; remote opportunity by design
• Chance to work abroad up to 60 days per year
• Career development programs, mentoring, and soft skills/well-being programs
• Certification options (Anthropic, Gemini, GCP, Azure, AWS)
• English classes
• Stable pay and Employee Stock Purchase Plan (15% discount)
• Benefits package (health insurance, multisport, shopping vouchers)
• Referral bonuses up to $2,000