Senior Software Engineer

G MASS
London

G MASS are currently looking for an experienced Software Engineer to join a leading Investment Manager client on an initial 6-month engagement. 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

Length: initial 6 months, with a view to being made permanent with the client

Posted 2026-03-12

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