Our client, a leading trading firm, is seeking a Quantitative Developer (Python) to join one of their top-performing desks in London. This role offers the opportunity to work closely with quantitative researchers, making strong experience across the full software development lifecycle essential. Candidates from FAANG or financial services backgrounds will be considered. This position is 80% project-focused, allowing you to take ownership of initiatives and see them through to completion. A strong mathematical foundation combined with Python expertise will be highly advantageous. Key Responsibilities Collaborate with on-site quantitative researchers to enhance trading strategies and improve P&L outcomes. Optimize and maintain the existing simulation/backtesting framework. Monitor and maintain quantitative research jobs. Develop Python-based tools to support trading strategy research. Requirements 2 years of professional experience in Python within FAANG or finance. Degree in Mathematics or Computer Science. Proven experience working alongside researchers is a plus. Knowledge of C++ is desirable but not essential.