We’re looking for a SS7 Tester to join the technical team in our London office.

The successful candidate will play a key role in our dynamic and award-winning technical team. You’ll be responsible for testing mission-critical systems that are delivered for mobile network operators, law enforcement and emergency service organisations worldwide.

Main Job Responsibilities:

  • Ensure products and releases reach a high level of quality before they are delivered to the client
  • Perform manual, automated and performance testing
  • Write test plans and reports including UAT test plans
  • Assist with UAT events

Expected experience:

  • Educated to 2:1 degree standard. (Maths or highly numerate subject qualifications would be advantageous)
  • Experience commensurate with ~3 years working for large telecom organisations, having followed structured testing methodologies
  • Good understanding of GSM/UMTS/LTE network and 3GPP standards.
  • Experience of SS7 / Sigtran (MAP and SCCP) signalling testing.
  • Experience of OMA MLP
  • Practical knowledge of automatic testing tool such as JMeter.
  • Experience of Protocol Analyzer tools like tcpdump, snoop etc.
  • Experience of writing test scripts (Bash, etc.) and writing simple SQL queries.
  • Experience of exploratory testing.

The following knowledge and experience is desirable:

  • Experience of Core / Radio Network interface testing
  • Experience of telecoms infrastructure with respect to that involved in location calculations e.g. GMLC, SMLC.
  • Experience of performance testing
  • Good command of Linux.
  • Experience of testing Diameter (LTE) protocols
  • Experience of assisting with User Acceptance Testing (UAT) for external clients
  • Experience of writing telecom test frameworks using CPPUnit/Google C++/TCLTk
  • Very good skills documenting and organising the UAT deliverables
  • Experience of (math) algorithm testing.