9fin

Senior AI Platform Engineer

London. Posted 4 months ago

The role

You will design and build the core platform for Generative AI, Agentic AI, and ML. This includes building agent runtimes, orchestration, model serving, and shared components to deliver AI as a service to internal teams.

What you will do

  • Build the platform behind agents including agent runtime, orchestration, model serving, sandboxing, and tracing and evals
  • Create shared components such as prompt management, AI gateways and evaluation services
  • Ship APIs, SDKs and tooling
  • Design secure, scalable deployment pipelines for models and applications
  • Build observability including tracing, evaluation, cost and quality in production
  • Set standards for testing, governance, Responsible AI and operations

Required qualifications

  • 5+ years of software engineering experience
  • 2+ years building AI/ML platforms, Generative AI applications or production machine learning systems
  • Experience designing and deploying enterprise AI applications to production
  • Hands-on experience building applications powered by Large Language Models
  • Experience building Model Context Protocol (MCP) and Retrieval-Augmented Generation (RAG) solutions
  • Experience building or contributing to agentic AI systems, intelligent workflows or orchestration frameworks
  • Strong backend engineering with production experience in Python and/or TypeScript
  • Experience designing scalable backend services and REST APIs
  • Experience building reusable platform capabilities, internal developer tooling, SDKs or shared engineering services
  • Strong experience building cloud-native applications
  • Comfortable with Docker, Kubernetes, CI/CD pipelines and containerised deployments
  • Experience with solutions such as AWS Bedrock and AgentCore

Nice to have

  • AI gateways and model routing
  • Prompt management platforms
  • AI evaluation frameworks
  • LangGraph, LangChain, LlamaIndex, DSPy, CrewAI or similar orchestration frameworks
  • Vector databases and semantic retrieval
  • Knowledge graphs or document understanding systems
  • Building internal AI platforms used by multiple engineering teams

Benefits

  • Competitive Salary
  • Equity
  • Pension (minimum contributions are 4% with 9fin matching up to 7%)
  • Private Medical Insurance
  • Paid sick leave with Income Protection for long periods of illness
  • Group Life Assurance
  • Season Ticket Loan & Cycle to Work schemes
  • 25 holiday days per year
  • Local public holidays (with the ability to exchange them for alternative days)
  • Work abroad for up to 3 months a year
  • 1 month paid sabbatical after 5 years of service
  • Enhanced parental leave & flexible working arrangements available

About the company

9fin is the AI platform powering global debt markets. The business is scaling at exceptional speed, with rapid expansion in the US.