# Senior Software Engineer

> G MASS · London, United Kingdom (Hybrid) · Contract · Posted 2026-03-12

**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 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

## Apply

[Apply at G MASS](https://apply.workable.com/g-mass/j/7AB2F6BA0F/apply)

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