Applications Test Engineer
CV-LibraryDerby, DerbyshirecontractPosted: 5 October 2026
Apply NowApplications Test Engineer
Salary: Competitive Salary| Derby - Onsite | Contract - 6 months initially | Flexible Working
Security Clearance: Minimum SC clearance required and have it cleared already; DV highly desirable
We're recruiting for a Applcations Test 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.
What We're Looking For:
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5+ years’ commercial experience in software or applications testing.
*
Strong experience testing Windows desktop applications, ideally within a .NET environment.
*
A solid understanding of functional, system, regression and integration testing.
*
Experience writing and executing structured test cases and test procedures.
*
Strong skills in defect investigation, troubleshooting and root cause analysis.
*
Experience testing UI/UX, user workflows and application functionality.
*
Good networking knowledge across TCP/IP, routing, switching, VLANs, DHCP, DNS and VPNs.
*
Practical understanding of SNMP and network device management.
*
Experience using Wireshark or similar packet-analysis tools.
*
Strong written and verbal communication skills, with the ability to produce clear technical documentation and test reports.
*
A methodical, analytical approach and excellent attention to detail.
*
The ability to work independently while collaborating effectively with software developers and engineering teams.
Key Responsibilities:
*
Create, review and maintain test plans, test procedures and test cases for Windows desktop applications.
*
Plan and execute functional, system, regression and integration testing.
*
Test applications used to configure, monitor and manage secure networking devices.
*
Validate software requirements and ensure requirements traceability throughout the development lifecycle.
*
Assess UI, UX and end-to-end user workflows to ensure applications are intuitive, reliable and fit for purpose.
*
Identify, reproduce, investigate and document software defects and technical issues.
*
Perform troubleshooting and root cause analysis, working closely with developers and engineers to resolve issues.
*
Validate communications between software applications and network-connected hardware.
*
Test SNMP functionality and network device management features.
*
Analyse network traffic and communications using Wireshark and similar tools.
*
Record test results, observations and defects accurately and maintain clear technical documentation.
*
Support software releases, acceptance testing and customer-facing validation activities.
*
Contribute to improving testing processes, methodologies and quality standards.
*
Support the development of automated testing and contribute scripting or automation ideas where appropriate.
*
Work collaboratively with software developers, systems engineers and product stakeholders to ensure high-quality software delivery.
What's on offer:
-25 days annual leave
-Company pension
-4x Death in service
-EV car scheme
-Benefit platform with high street discounts
If you have the experience we are looking for and you think you will succeed within this industry and role, apply today
Salary: Competitive Salary| Derby - Onsite | Contract - 6 months initially | Flexible Working
Security Clearance: Minimum SC clearance required and have it cleared already; DV highly desirable
We're recruiting for a Applcations Test 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.
What We're Looking For:
*
5+ years’ commercial experience in software or applications testing.
*
Strong experience testing Windows desktop applications, ideally within a .NET environment.
*
A solid understanding of functional, system, regression and integration testing.
*
Experience writing and executing structured test cases and test procedures.
*
Strong skills in defect investigation, troubleshooting and root cause analysis.
*
Experience testing UI/UX, user workflows and application functionality.
*
Good networking knowledge across TCP/IP, routing, switching, VLANs, DHCP, DNS and VPNs.
*
Practical understanding of SNMP and network device management.
*
Experience using Wireshark or similar packet-analysis tools.
*
Strong written and verbal communication skills, with the ability to produce clear technical documentation and test reports.
*
A methodical, analytical approach and excellent attention to detail.
*
The ability to work independently while collaborating effectively with software developers and engineering teams.
Key Responsibilities:
*
Create, review and maintain test plans, test procedures and test cases for Windows desktop applications.
*
Plan and execute functional, system, regression and integration testing.
*
Test applications used to configure, monitor and manage secure networking devices.
*
Validate software requirements and ensure requirements traceability throughout the development lifecycle.
*
Assess UI, UX and end-to-end user workflows to ensure applications are intuitive, reliable and fit for purpose.
*
Identify, reproduce, investigate and document software defects and technical issues.
*
Perform troubleshooting and root cause analysis, working closely with developers and engineers to resolve issues.
*
Validate communications between software applications and network-connected hardware.
*
Test SNMP functionality and network device management features.
*
Analyse network traffic and communications using Wireshark and similar tools.
*
Record test results, observations and defects accurately and maintain clear technical documentation.
*
Support software releases, acceptance testing and customer-facing validation activities.
*
Contribute to improving testing processes, methodologies and quality standards.
*
Support the development of automated testing and contribute scripting or automation ideas where appropriate.
*
Work collaboratively with software developers, systems engineers and product stakeholders to ensure high-quality software delivery.
What's on offer:
-25 days annual leave
-Company pension
-4x Death in service
-EV car scheme
-Benefit platform with high street discounts
If you have the experience we are looking for and you think you will succeed within this industry and role, apply today