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Market Microstructure Engineer - High-Frequency Trading Systems Location: London Our client is a renowned hedge fund operating across major liquid asset classes. They are seeking a Market Microstructure Engineer to join their high-performance trading technology group. In this role, you will analyse network and exchange protocols, automate performance metrics, and lead experiments to optimise trading behaviour on latency-sensitive exchanges. This position places you at the core of high-frequency trading, where microseconds matter and technical insight directly impacts trading performance Your background will ideally include a degree in Computer Science, Engineering, or a related field, alongside 5+ years of experience in data analysis, low-level systems engineering, or network engineering. You will bring strong skills in Python, time-series analysis, and network protocols, paired with familiarity with market microstructure and low-latency trading environments. Experience with exchange connectivity, high-performance Linux systems, and real-time monitoring tools will support success in this role. Key Responsibilities Analyse network and exchange protocol captures to identify inefficiencies and enhance communication performance Research exchange behaviours and features, engage with exchange representatives, and gather insights from technical sessions Reverse-engineer trading systems and run experiments to optimise execution and improve fill rates Collaborate closely with trading and research teams to apply findings and deliver direct PnL impact Work with large, complex datasets to diagnose inefficiencies in internal execution systems and exchange interactions Key Requirements Degree in Computer Science, Engineering, or a related field 5+ years of experience in data analysis, low-level systems,