On-Site C++/C# Software Engineer — 4‑Day Week Contract

Advantage Resourcing UK Ltd; Bolton; On-site; GBP 83,000 - 96,000; Full time

Job summary

World Class Defence Organisation in Bolton is seeking a skilled C# / C++ Software Engineer for a 12-month subcontractor contract. The role is onsite with a compressed 4-day week option, 37 hours per week, with overtime paid at time and a quarter.

The position operates Inside IR35 (Umbrella) and is a 12-month initial contract. You will work on data capture, analysis, and training systems, developing in Windows environments, collaborating with subsystem teams, and contributing to design,

Qualifications

• Extensive experience in C++ / C# development in a Windows environment.
• Proficiency in C# for tooling, tests, or Windows components as needed.
• Demonstrable skills in multi-threaded and concurrent programming.
• Experience with version control systems (e.g., Git) and CI/CD pipelines.
• Experience of working with technical documentation to inform the software engineering process around system software requirements.
• Familiarity with unit testing frameworks, automated test rigs, or hardware-in-the-loop (HWIL) setups.
• Experience of software engineering tools including GitLab, SonarQube, JIRA, Confluence.
• Experience of IBM DOORS software for managing requirements and test evidence.

Responsibilities

• Design and develop the system interface computer software that captures the performance data.
• Support setting to work of new software to perform target testing on Windows hardware.
• Architect and implement robust, scalable, and maintainable multi-threaded applications.
• Lead and contribute to system integration, verification, and testing at both component and system levels.
• Conduct performance analysis, debugging, and optimisation of real-time systems.
• Document architecture, interface definitions, and test procedures to support handover and formal test activities.

Skills

C++ / C#

C# development

Multi-threading

Memory management

Git / CI & CD

Technical documentation

Tools

GitLab

SonarQube

JIRA

Confluence

IBM DOORS

Job description

World Class Defence Organisation in Bolton is seeking a skilled C# / C++ Software Engineer for a 12-month subcontractor contract. The role is onsite with a compressed 4-day week option, 37 hours per week, with overtime paid at time and a quarter.

The position operates Inside IR35 (Umbrella) and is a 12-month initial contract. You will work on data capture, analysis, and training systems, developing in Windows environments, collaborating with subsystem teams, and contributing to design,