Senior Python Developer (FinTech)

Quick Facts

• Role: Senior Python Developer (FinTech)

• Focus: data processing workflows, SQL optimization for trading databases, and data reconciliation

• Working hours: until 8–9 PM

Description

Senior Python Developer (FinTech) to build and maintain large-scale data workflows and trading database queries. You will collaborate via Git, operate CI/CD pipelines (build/test/deploy/rollback), and analyze and reconcile discrepancies across datasets and model outputs.

Responsibilities

• Develop data processing workflows using Python and manage virtual environments

• Write and optimize SQL queries for trading databases

• Collaborate using Git: branching, Pull Requests, and code reviews

• Support CI/CD pipeline operations: 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 two results and explain the difference

• Experience with Git: 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 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)

• English classes

• Stable pay; Employee Stock Purchase Plan with 15% discount

• Benefits package (health insurance, multisport, shopping vouchers)

• Referral bonuses up to $2,000

• Office amenities and social/well-being events

• Contractors possible (B2B terms agreed individually)