About this role
Salary: £? - ? per year
Requirements: Experience testing Windows desktop applications, particularly Microsoft .NET-based applicationsExperience with functional, system, regression and integration testingAbility to create test cases and test procedures and carry out requirements-based testingExperience with UI and usability testing, defect investigation and management, technical documentation and test reportingKnowledge of networking technologies and protocols, including TCP/IP, routing, switching, VLANs, DHCP, DNS and VPNsExperience with SNMP, network device management, and Wireshark or similar packet/network analysis toolsExperience testing applications that interact directly with networking, communications or security hardware is particularly usefulCurrent SC/DV clearance is preferred; candidates whose clearance has been on hold within the last 12 months may be considered, subject to eligibility for transfer or reactivationAbility to meet relevant nationality and security eligibility requirementsAdvantageous experience includes Python scripting, test automation, REST API testing, Linux, Azure DevOps or Jira, and Network+, CCNA or similar networking knowledge or qualificationsPrevious experience in Defence, Government, Cyber Security, communications or another high-integrity engineering environment is advantageous Responsibilities: Create and execute test cases and test proceduresPerform functional, regression, system and integration testingTest Windows/.NET desktop applications, including application workflows, usability and UI functionalityTest communications between software applications and network-connected devicesInvestigate, reproduce and document software defectsAnalyse network traffic using Wireshark or similar toolsTest networking and device-management functionality, including SNMPSupport requirements validation and traceability, and produce clear test documentation and reportsWork with software developers and systems engineers to troubleshoot issuesContribute to test automation where appropriate Technologies: APIAzureDevOpsHardwareSupportJIRALinuxNetworkPythonRESTSecurityTCP/IPWindowsUX UI DesignASP.NETCloud More:
We are supporting a specialist technology and engineering business with the appointment of an experienced Applications Test Engineer. The role involves hands-on testing of Windows-based applications in complex networking and communications environments, working alongside an established team of software and systems engineers to help ensure reliable performance before release. This is an initial 6–12-month contract, fully onsite in Derbyshire, with a negotiable day rate depending on experience and outside IR35.
last updated 40 week of 2026