fastapi developer

9fin is an AI platform that centralizes proprietary credit data, deep analysis, and high-value workflows for global debt markets. The platform replaces fragmented data and manual processes with a single infrastructure, serving blue-chip institutions including global banks, asset managers, and private equity firms.

• Lead projects by defining and designing systems, building proof of concepts, and delivering new service functionality including APIs, data processing, and automation;
• Develop and engineer backend services and web application tools for the platform;
• Act as a senior individual contributor by running code reviews and mentoring other developers;
• Conduct early research and experimentation with new technologies to provide input for new features and products;
• Improve the codebase through automation, refactoring, and documentation;
• Collaborate with cross-functional teams including financial, legal, and editorial colleagues;
• Explain and break down complex projects to non-technical audiences.

• Experience operating as a Senior IC Engineer, leading systems design and infrastructure discussions, and scoping work within cross-functional product teams;
• Ability to plan and reason about software while communicating its purpose and business impact;
• Hands-on experience designing data flow from persistent storage to API endpoints;
• Experience with Python and web frameworks like FastAPI, Pydantic, and strong typing;
• Strong experience delivering APIs and Service Oriented Architecture;
• Strong working knowledge of SQL;
• Commitment to writing testable, maintainable code and engaging in code reviews;
• Nice to have: Experience in data modelling and with a pipeline orchestrator.

• Competitive salary benchmarked at the top end of the market;
• Equity options;
• Pension scheme with company matching up to 7%;
• Private Medical Insurance;
• Income Protection for long periods of illness;
• Group Life Assurance;
• Season Ticket Loan and Cycle to Work schemes;
• 25 Days of holiday per year plus local public holidays;
• Ability to work abroad for up to 3 months a year;
• 1 Month paid sabbatical after 5 years of service;
• Enhanced parental leave and flexible working arrangements;
• Professional learning and development budget;
• Quarterly team socials and seasonal company events.