Quantitative Developer - Fixed Income RAD

Millennium; Greater London; On-site; GBP 100,000 - 140,000; Full time

Job summary

Millennium seeks a senior engineer to prototype and deliver production-grade analytics applications with a focus on AI/LLM capabilities in Fixed Income. You will collaborate with PMs, traders, and risk teams to design data pipelines and interfaces that surface insights and streamline workflows.

You will work across Python data science stacks and a modern front-end stack (React/TypeScript) while leveraging Kubernetes and ArgoCD in a fast-paced, collaborative environment.

Qualifications

• Bachelor's degree in Computer Science or related field.
• 5+ years of development experience in production environments, preferably Python with data science stack.
• Experience in financial markets using math, modeling, or statistics.
• Experience with AI/LLM tools for development and AI solutions.
• Full stack experience with React+TypeScript/Deno and cloud tech (Kubernetes EKS/ArgoCD).
• Strong communication and ability to work independently in a fast-paced setting.
• High attention to detail and ownership.

Responsibilities

• Work directly with portfolio managers, traders, desks, and risk teams to prototype and deliver production-grade applications.
• Build and maintain data pipelines combining internal and market data into analytics formats (dashboards, APIs, Excel/notebook tools).
• Design and build data visualizations and web UIs (React/TypeScript) to surface trends and streamline workflows.
• Develop AI/LLM-powered capabilities into team applications (RAG, chat-data ingestion, MCP servers/tools).
• Partner with FI Management, Execution, and Risk to capture requirements and manage delivery.
• Maintain and improve deployed capabilities as new requirements arise.
• Integrate into FI-RAD's fast-moving culture with timely, production-grade solutions.

Skills

Python

Data pipelines

React

TypeScript

Deno

Kubernetes

ArgoCD

AI/LLM tools

Communication

Ownership

Education

Bachelor's degree in Computer Science

Tools

ArgoCD

Claude/Codex/Cursor

Job description

About Millennium

Millennium is a global, diversified alternative investment firm, founded in 1989. Defined by evolution, innovation and focus, Millennium’s mission is to deliver results for our investors.

Our people are empowered with both independence and support: the autonomy to pursue ideas with conviction and the backing of a global network committed to collaboration, disciplined risk management and continuous learning. With opportunities to deepen expertise and accelerate development, talent at Millennium is equipped to adapt, evolve and build lasting impact over time. Discover how transformative growth accelerates impact.

Meet the Team

The Information Technology department is core to the health and growth of Millennium’s business. The firm’s active, multi-manager model demands flexible, scalable technology and advanced proprietary systems, including the development of the next generation of analytical and trading capabilities. The Fixed Income Rapid Application Development (RAD) team is a specialized group of engineers, quants, and data scientists that delivers tactical, production-grade application and AI solutions for Fixed Income portfolio managers, traders, risk, and operations teams. Working closely with investment, execution, risk, and compliance partners, the team rapidly prototypes and industrializes custom applications, including solutions that increasingly incorporate AI and LLM-driven capabilities.

What You’ll Do

• Work directly with portfolio managers, traders, execution desks, and risk teams to rapidly prototype and deliver tactical, production-grade applications.
• Build and maintain data pipelines that combine internal and market data sources into custom analytics and delivery formats (dashboards, APIs, Excel/notebook tools).
• Design and build data visualizations and web UIs (React/TypeScript) that surface data trends and streamline PM/trading/risk workflows.
• Develop and integrate AI/LLM-powered capabilities into team applications, e.g., Retrieval-Augmented Generation (RAG), chat-data ingestion pipelines, MCP (Model Context Protocol) servers/tools, building and using AI coding agent automation (Claude Code/Codex/Cursor).
• Partner with Fixed Income Management, Execution, and Risk teams to capture requirements, monitor delivery, and manage expectations for both traditional analytics tools and newer AI-driven applications.
• Maintain, support, and continuously improve deployed capabilities as new requirements arise
• Fit into FI-RAD's fast-moving culture, judged on the ability to deliver timely, production-quality solutions directly to PMs and risk/trading desks.

What You Bring

• Bachelor’s degree in Computer Science or a related field
• 5+ years of development experience in a production environment, ideally with Python using data science stack libraries
• Experience in financial markets, including areas such as rates, FX, credit, or commodities using mathematics, modeling, and/or statistics
• Experience with AI/LLM tools for development and/or AI solutions such as Agent Tools, Skills, MCPs
• Full stack experience with React+Typescript/Deno and cloud technologies (Kubernetes EKS/ArgoCD)
• Strong communication skills and the ability to work independently in a fast-paced setting
• High attention to detail, strong organization, and a clear sense of ownership and accountability for your work