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. 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 Salary: up to £100k Permanent contract.