Senior Python Developer (Fintech)

We are hiring a Senior Python Developer (Fintech) to join us, with a strong technical background in application development and deployment pipelines, focusing on large-scale systems and trading databases.

Working hours run until 8–9 PM.

Responsibilities

• Develop data processing workflows using Python and manage virtual environments
• Write and optimize SQL queries for trading databases
• Collaborate via Git, including branching, creating Pull Requests, and conducting code reviews
• Participate in CI/CD pipeline operations, including building, testing, deploying, and rolling back changes when needed
• Analyze large, complex datasets such as loan-level tapes and model outputs
• Reconcile results from different sources and investigate underlying discrepancies
• Explain and document differences found during data reconciliation processes

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
• Capability to reconcile two results and explain the difference
• Experience with Git, including branching, Pull Requests, and code reviews
• Proficiency in English at a B2+ level

Nice to have

• Knowledge of SQL Server/T-SQL
• Familiarity with Linux command line, SSH, and mixed Windows/Linux file shares (SMB/NFS)
• Understanding of CI/CD pipeline functions, including building, testing, deploying, and rolling back changes
• Background in fixed income basics: price/yield, duration and convexity, spreads (OAS, Z spread), coupon vs yield, and accrued interest

Benefits

We gather like-minded people:

• Top tech minds driving innovation in AI, cloud and digital platform modernization
• Supportive team and agile, startup-like culture
• Hybrid by design mode and opportunity to work remotely within Poland
• Chance to work abroad for up to 60 days annually
• Business-driven relocation opportunities

We provide growth opportunities:

• Career development programs
• Thought leadership, mentoring, soft skills and well-being programs
• Certification (Anthropic, Gemini, GCP, Azure, AWS)
• English classes

We cover it all:

• Stable pay
• Participation in the Employee Stock Purchase Plan with a 15% discount
• Benefits package (health insurance, multisport, shopping vouchers)
• Referral bonuses up to $2,000
• Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more
• Corporate, social and well-being events

Please, note:

• Benefits listed above are available to employees only
• We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually
• We will reach out to selected candidates exclusively