Lead Python Developer (Fintech)

Quick Facts

• Role: Lead Python Developer (Fintech)
• Focus: trading databases, data processing workflows, CI/CD pipelines
• Working hours: extends to 8–9 PM

Description

Lead Python Developer role focused on building Python-based data processing workflows and fine-tuning SQL for trading databases. You will manage virtual environments, work with large datasets, reconcile results across sources, and support CI/CD tasks including builds, testing, deployments, and rollbacks.

Role Description & Responsibilities

• Build data processing workflows using Python while managing virtual environments
• Craft and fine-tune SQL queries designed for trading databases
• Collaborate via Git (branching, Pull Request creation, and code review)
• Handle CI/CD pipeline tasks: builds, testing, deployments, and rollbacks when needed
• Examine large and complex datasets, including loan-level tapes and model outputs
• Cross-check results from multiple sources and investigate discrepancies
• Document and clarify variances found during data reconciliation

Requirements

• Minimum 7 years working as a Python Developer
• Strong command of Python, Pandas, and NumPy
• Ability to use conda, poetry, and uv for package and virtual environment management
• Expertise in crafting and refining SQL queries
• Experience handling large, unstructured datasets (loan-level tapes, model outputs)
• Ability to reconcile two sets of results and articulate the reasoning behind differences
• Hands-on Git experience, including branching, Pull Requests, and code review practices
• English proficiency at B2+ level or higher

Benefits

• Hybrid work model with the option to work remotely within Poland
• Opportunity to work abroad up to 60 days annually; 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 Employee Stock Purchase Plan (15% discount)
• Benefits package (health insurance, multisport, shopping vouchers)
• Referral bonuses up to $2,000
• Office amenities and corporate/social/well-being events