G MASS

Senior Software Engineer

Backend EngineeringConfirmed live in the last 24 hours

Full-timeLondon, UK£100kHybrid

About the Job

Requirements

A degree in a quantitative or technical field, such as Computer Science, Mathematics, Engineering, or Physics.
At least 5 years of software engineering experience using Java or Python.
Strong knowledge of Linux and Git.
Experience with modern databases such as Postgres or MongoDB, or similar systems.
Strong problem-solving skills and attention to detail.
Ability to work independently and collaborate with stakeholders.

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.

Desired Qualifications

Exposure to distributed systems.
Open-source contributions.
Familiarity with large language models and artificial intelligence tooling.

Senior Software Engineer

G MASS · London, United Kingdom (Hybrid) · Full-time · Posted 2026-06-05

Salary: Up to GBP 100,000

Workplace: hybrid

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.

Apply

Apply at G MASS

About the Company

G MASS

Company size: Not listed
Company stage: Not listed
Total funding: Not listed
Headquarters: Not listed
Founded: Not listed

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