Senior Backend Engineer

9fin delivers fast and comprehensive financial, credit, legal & ESG analysis for debt capital markets using proprietary technology.
Backend
Senior Software Engineer
Hybrid
Finance · Enterprise SaaS

Description For Senior Backend Engineer

9fin is revolutionizing the debt capital markets through innovative technology. As the world's largest asset class, debt currently operates with outdated practices and scattered information. 9fin's mission is to modernize this space by providing cutting-edge solutions for financial, credit, legal & ESG analysis.

As a Senior Backend Engineer at 9fin, you'll join a dynamic environment working with Python, Flask, FastAPI, and PostgreSQL on AWS infrastructure. You'll lead critical projects, designing and implementing systems that handle complex financial data modeling, access control, and ML/AI integration. The role offers significant technical challenges while working with a modern stack including serverless architecture and containerized deployments.

The position combines technical leadership with hands-on development, requiring both strong engineering skills and the ability to mentor team members. You'll work in cross-functional teams, collaborating with domain experts from financial, legal, and editorial backgrounds. The company's developer experience is optimized with automated preview environments and feature flags, enabling rapid iteration and feedback.

9fin offers an attractive compensation package including equity, comprehensive healthcare, and flexible working arrangements. The company's commitment to professional development is evident through learning budgets and regular team events. With clients including top Investment Banks, Asset Managers, and Law Firms, you'll be working on solutions that directly impact major financial institutions.

This role is perfect for a senior engineer who wants to make a significant impact in financial technology while working with modern tools and practices. The company's focus on work-life balance, professional growth, and inclusive culture makes it an ideal environment for long-term career development.

Last updated 7 hours ago

Responsibilities For Senior Backend Engineer

  • Lead projects by defining and designing systems
  • Build proof of concepts and deliver new service functionality
  • Development on backend services and web application hosted tools
  • Run code reviews and mentor other developers
  • Provide input for new features and products
  • Improve codebase through automation, refactoring and documentation
  • Collaborate in cross-functional teams

Requirements For Senior Backend Engineer

Python
PostgreSQL
TypeScript
  • Experience operating as a Senior IC Engineer, leading systems design and infrastructure discussions
  • Ability to plan and reason about software effectively
  • Hands-on experience designing data flow through software
  • Experience with Python and its web frameworks (FastAPI with strong typing & Pydantic)
  • Strong experience delivering APIs, Service Oriented Architecture
  • Good working knowledge of SQL statements
  • Strong collaboration and communication skills

Benefits For Senior Backend Engineer

Medical Insurance
Dental Insurance
Vision Insurance
Equity
Parental Leave
Education Budget
401k
Commuter Benefits
  • Competitive Salary
  • Equity options
  • Pension with company matching up to 7%
  • Private Medical Insurance
  • Income Protection
  • Group Life Assurance
  • Season Ticket Loan & Cycle to Work schemes
  • 25 holiday days per year
  • Work abroad for up to 3 months a year
  • 1 month paid sabbatical after 5 years
  • Enhanced parental leave
  • Professional learning budget of £1250
  • Quarterly team socials
  • Summer and Winter company events

Interested in this job?

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