Integration Software Engineer

Software Tester - Manual - Derby, East Midlands

Ref: 120Thursday 16 July 2026

Competitive Salary

Competitive Salary | Exceptional benefits - listed below | Derby - 5 days Onsite | Permanent 

Please note: Applicants must hold SC Clearance. There may also be a requirement to obtain DV Clearance in the future, so candidates must be willing to undergo the necessary vetting process.

 

We're recruiting for a Integration Software Engineer to join a growing and ambitious team at a pivotal stage in its journey.

Want to be part of a business that is disrupting the national security market? Our client is a fast-growing UK sovereign technology company delivering innovative encryption and secure communications solutions to some of the country's most demanding customers. Combining deep technical expertise with an agile, customer-focused approach, they are challenging the status quo and proving that world-class capability can come from a dynamic and ambitious SME.

As an Integration Software Engineer, you will develop, maintain, and integrate internal business applications and automation tools. You'll work with open-source ERP systems, .NET applications, scripting languages, and SQL-based data integrations, collaborating closely with Software, QA, and Production teams to deliver reliable and efficient business solutions.

Skills and experience required 

  • NET development — Development of C#/.NET applications and services.

  • Knowledge of designing, deploying and maintaining SQL databases.

  • Experience of writing complex SQL queries.

  • Experience of .NET coding in a professional environment.

  • Experience debugging complex systems.

  • Source control using Git, SVN or CVS.

  • An appreciation of scripting languages.

  • Understanding of best practices in developing maintainable code, documentation and test.

What's on offer

  • A friendly, highly technical team that values collaboration and personal growth.

  • 25 days holiday (with buy/sell up to 5 days coming this year).

  • Up to 10% bonus scheme.

  • 4% company pension contribution.

  • Free on‑site EV charging (fair‑use policy applies).

  • Flexible working culture within an office‑based role.

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