Senior Software Engineer

G MASS are currently looking for an experienced Software Engineer to join a leading Investment Manager client. This role sits within a core engineering team at the centre of a highly quantitative investment environment, supporting the technology and data platforms that underpin systematic trading strategies and advanced research. You will be working in a fast-paced, data-driven environment where engineering plays a critical role in enabling investment teams to access, process and utilise large volumes of market and research data. Responsibilities - Design, develop and enhance large-scale data and infrastructure platforms supporting trading and research. - Build and maintain systems capable of processing large volumes of data from numerous global sources. - Work closely with researchers, traders and engineers to ensure platforms effectively support investment workflows. - Contribute to improving the scalability, performance and reliability of distributed systems. - Develop and maintain services primarily using Java and Python. - Work across modern data and messaging technologies including Kafka, ArcticDB and MongoDB. Requirements - Degree in a quantitative/technical field (e.g. Computer Science, Mathematics, Engineering or Physics) - 5+ years’ software engineering experience using Java or Python - Strong Linux and Git knowledge - Experience with modern databases (e.g. Postgres, MongoDB or similar) - Strong problem-solving skills and attention to detail - Able to work independently and collaborate with stakeholders Nice to have - Exposure to distributed systems - Open-source contributions - Familiarity with LLMs / AI tooling Benefits Salary: up to £100k Permanent contract.