Applications Test Engineer
Listed on 2026-09-30
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IT/Tech
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
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