Senior Python Developer (Fintech)

TL;DR

Senior Python Developer (Fintech): Take ownership of the full delivery lifecycle of Python financial models and automation tools with an accent on design, build, testing, packaging, release, and ongoing support. Focus on developing performant financial models optimized for large datasets and user-friendly UIs.

Location: Hybrid in Leeds, Halifax, Bristol, Cardiff, or Newport, United Kingdom, requiring at least two days per week in office.

Salary: £65,385 – £72,650

Company

hirify.global is transforming its financial services to shape the future of finance for millions of people.

What you will do

• Own the full delivery lifecycle of Python financial models and automation tools.
• Collaborate closely with Business Analysts and domain experts to translate business needs into technical solutions.
• Develop performant financial models and user-friendly UIs optimized for large datasets.
• Package and distribute models as deployable artifacts, ensuring reproducibility and dependency management.
• Ensure code quality and maintainability with thorough unit, integration, and system tests.
• Provide mentorship and line management for a Junior Python developer.

Requirements

• Proven track record of Python model development and implementation.
• Strong understanding of core software development principles.
• Ability to develop complex financial models, optimize for performance, and handle large datasets efficiently.
• Experience with common Python tooling and best practices, including virtual environments, package management (uv, pip, poetry), Git/GitHub, CI/CD pipelines, and testing frameworks (pytest, unittest).
• Excellent communication and presentation skills.
• Passion for learning and staying ahead of the curve.
• Work style is hybrid, requiring at least two days per week at office sites in Leeds, Halifax, Bristol, Cardiff, or Newport, United Kingdom.

Nice to have

• Experience with front-end technologies such as React.
• Experience with data processing and validation libraries (Polars, Pandera), numerical computing (NumPy, Numba), and API frameworks (FastAPI).

Culture & Benefits

• Commitment to diversity, equity, and inclusion, with reasonable workplace adjustments.
• Generous pension contribution of up to 15%.
• Annual performance-related bonus and share schemes, including free shares.
• 30 days’ holiday, plus bank holidays.
• A range of wellbeing initiatives and generous parental leave policies.
• Disability Confident Leader status, guaranteeing interviews for eligible applicants.