Telecoms Test Engineer

Test Engineer (x2) - Mobile Core Networks (Voice/HLR/HSS)

Location: Slough Lab & Reading Office (Lab-Based)
Rate: £375 per day (Inside IR35)
Contract: Initial 3-month contract

We are currently seeking two experienced Test Engineers to join a leading telecommunications programme supporting the testing and validation of mobile core network services.

This is a lab-based role, split between the Slough testing lab and the Reading office, working on critical mobile network infrastructure with a focus on voice and subscriber management technologies.

Key Responsibilities

• Execute functional and integration testing across mobile core network environments.
• Test and validate mobile voice and messaging services.
• Support testing activities involving HLR (Home Location Register) and HSS (Home Subscriber Server) platforms.
• Identify, investigate, and document defects, working closely with engineering and development teams to resolve issues.
• Produce clear test documentation, including test plans, test cases, and test reports.
• Ensure testing is completed to agreed quality standards and project timescales.

Essential Skills & Experience

• Proven experience as a Telecommunications Test Engineer or Network Test Engineer.
• Strong background in mobile voice and messaging technologies.
• Hands-on experience with HLR (Home Location Register) and HSS (Home Subscriber Server).
• Experience testing within 2G, 3G and/or 4G LTE mobile core network environments.
• Excellent troubleshooting and analytical skills.
• Ability to work effectively within a fast-paced technical team.

Contract Details

• Role: Test Engineer (x2)
• Location: Slough Lab & Reading Office (Lab-Based)
• Rate: £375 per day
• IR35 Status: Inside IR35
• Duration: Initial 3-month contract