Senior Python Developer (Fintech)

Quick Facts

• Role: Senior Python Developer (Fintech)
• Focus: large-scale data processing, trading databases, and data reconciliation

Description

Build and optimize data processing workflows in Python and support end-to-end deployment through CI/CD. Work with trading databases and analyze large, complex datasets to reconcile results across sources and document discrepancies. Collaborate with the team via Git, including code reviews and Pull Requests.

Responsibilities

• Develop data processing workflows using Python and manage virtual environments
• Write and optimize SQL queries for trading databases
• Collaborate via Git: branching, Pull Requests, and code reviews
• Operate CI/CD pipelines: build, test, deploy, and roll back changes
• Analyze large datasets such as loan-level tapes and model outputs
• Reconcile results from different sources and investigate discrepancies
• Explain and document differences found during reconciliation

Requirements

• 5+ years of experience as a Python Developer
• Proficiency in Python, Pandas, and NumPy
• Flexibility to use conda, poetry, and uv for packaging and virtual environment management
• Skills in writing and optimizing SQL queries
• Background in analyzing large, messy datasets such as loan-level tapes and model outputs
• Ability to reconcile results and explain differences
• Experience with Git, including branching, Pull Requests, and code reviews
• English proficiency at B2+ level

Benefits

• Hybrid by design mode with opportunity to work remotely within Poland
• Chance to work abroad for up to 60 days annually
• Business-driven relocation opportunities
• Career development programs
• Thought leadership, mentoring, soft skills and well-being programs
• Certifications (Anthropic, Gemini, GCP, Azure, AWS)
• English classes
• Stable pay
• Employee Stock Purchase Plan with a 15% discount
• Benefits package (health insurance, multisport, shopping vouchers)
• Referral bonuses up to $2,000
• Office amenities (entertainment and relaxation zones, table tennis and football, free snacks and coffee)
• Corporate, social and well-being events
• Note: Benefits are for employees only; contractors can be engaged via individually agreed B2B terms.