Hiring: Senior Quantitative Developer
Company: Millennium Management
Location: London, England, United Kingdom / On-Site
Employment Type: Full-time
Seniority Level: Senior level (10+ years experience)
Estimated Salary: £200,000 - £350,000 per annum (plus performance-based bonus & hedge fund compensation structure)
Industry: Investment Management / Quantitative Trading & Hedge Funds
Company Overview
Millennium Management is a global, multi-manager alternative investment firm founded in 1989. Operating with a technology-driven, disciplined approach to risk management,
Millennium relies on its advanced Information Technology and Quantitative Trading teams to support central trading desks and portfolio managers across global markets.
The firm develops proprietary, ultra-low latency execution infrastructure, high-throughput market data engines, and algorithmic strategy containers.
Millennium provides an autonomous, performance-focused environment where top-tier engineering talent builds transformative systems with global market impact.
Key Responsibilities
Architect, engineer, and maintain low-latency C++ execution algorithms, Order Management Systems (OMS), strategy containers, direct market access (DMA) connectivity, and messaging protocols.
Partner directly with central quantitative trading teams to optimize execution performance and market impact across equities and futures.
Minimize end-to-end system latency using advanced Linux kernel tuning, custom networking sockets, memory management, and cache-optimization techniques.
Engineer high-throughput interfaces and tools for historical market data processing, backtesting, and trading simulations to accelerate quantitative research workflows.
Build automated testing suites, micro-benchmarking frameworks, and internal telemetry tools to validate performance under high-volatility market conditions.
Leverage modern AI/LLM-assisted development tools to enhance code quality, refactoring, and overall engineering velocity.
Experience & Qualifications
Minimum 10+ years of professional software development experience, including at least 5 years directly in a front-office financial services environment (Hedge Fund, Prop Trading Firm, or Investment Bank).
Bachelor’s degree in Computer Science, Computer Engineering, Software Engineering, or a quantitative discipline.
Proven track record building real-time, low-latency execution systems, order routers, or market data feeds for equities, futures, or options.
Deep understanding of financial market mechanics, exchange protocols (FIX, ITCH/OUCH), order book dynamics, and execution algorithms.
Strong collaborative mindset with the ability to gather requirements and deliver mission-critical tools directly to quantitative traders under fast-paced market conditions.
Technical Skills Required
Core Programming: Mastery of C++17 and C++20, modern object-oriented design, template metaprogramming, and lock-free data structures.
Systems & Concurrency: Deep understanding of Linux OS internals, multithreading, async architecture, low-latency network programming (TCP/UDP, kernel bypass), and memory-mapped IO.
Data & Scripting: Proficiency in Python for quantitative analysis, execution algorithm performance attribution, and data processing.
AI & Engineering Tooling: Active usage of modern LLM-based coding tools to accelerate software engineering lifecycle, plus continuous benchmarking tools.
Apply Now
To build next-generation trading systems with one of the world's leading alternative investment managers, submit your CV and technical portfolio through Millennium's career portal.
Millennium offers industry-leading compensation packages, generous performance bonuses, comprehensive health benefits, and continuous technical growth within global financial markets.