Senior Python Developer (Fintech)

Quick Facts

• Role: Senior Python Developer (Fintech)

• Focus: Large-scale data processing, trading databases, and CI/CD operations

Description

You will develop Python-based data processing workflows for fintech use cases involving trading data and loan-level tapes. The role includes writing and optimizing SQL queries, reconciling results across data sources, and investigating and documenting discrepancies. You’ll also participate in Git collaboration and CI/CD pipeline operations for building, testing, deploying, and rolling back changes.

Responsibilities

• Develop data processing workflows using Python and manage virtual environments

• Write and optimize SQL queries for trading databases

• Collaborate with Git (branching, Pull Requests, code reviews)

• Support CI/CD pipeline operations (build, test, deploy, rollback)

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

• Reconcile results from different sources and investigate discrepancies

• Explain and document differences found during data 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 (branching, Pull Requests, code reviews)

• English proficiency at B2+ level

Benefits

• Hybrid work model by design; remote work possible within Poland

• Opportunity to work abroad up to 60 days annually and relocation support

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

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

• Corporate and social events, plus well-being activities and office perks (snacks, coffee, entertainment zones)