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Applications Test Engineer

Job in Belper CP, Belper, Derbyshire, DE56, England, UK
Listing for: Precept Recruit
Full Time position
Listed on 2026-09-30
Job specializations:
  • IT/Tech
Salary/Wage Range or Industry Benchmark: 45000 - 65000 GBP Yearly GBP 45000.00 65000.00 YEAR
Job Description & How to Apply Below

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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