Senior Software Engineer

G MASS Consulting; Greater London; On-site; GBP 90,000 - 110,000; Full time

Job summary

G MASS Consulting is seeking an experienced Software Engineer to join a leading Investment Manager in Greater London. The role involves working in a dynamic, data-driven environment, enhancing infrastructure platforms that support trading and research workflows.

The ideal candidate has over 5 years of experience in Java or Python and is familiar with Linux and modern databases. Responsibilities include developing systems for large-scale data processing and improving platform scalability and performance.

Qualifications

• 5+ years' software engineering experience using Java or Python.
• Strong knowledge of Linux and Git.
• Experience with modern databases such as Postgres, MongoDB.

Responsibilities

• Design, develop and enhance large-scale data and infrastructure platforms.
• Build and maintain systems for processing large volumes of data.
• Work closely with researchers, traders and engineers.

Skills

Java

Python

Linux

Git

Problem-solving

Education

Degree in a quantitative/technical field

Tools

Postgres

MongoDB

Kafka

ArcticDB

Job description

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.