E2E Network Performance Engineer

Salt Mobile SA

Berne, Fribourg, Rive droite, Rive gauche, Ville de Genève, Jura, Neuchâtel, La Côte, Nord vaudois,.
  • Publication date:

    25 September 2022
  • Workload:

  • Contract:

    Permanent position
  • Homeoffice:

  • Place of work:

    Berne, Fribourg, Rive droite, Rive gauche, Ville de Genève, Jura, Neuchâtel, La Côte, Nord vaudois,.

Workplace: Renens / Crissier

Workload: 100%


Well, we're looking for talented people who share our interests and values. Do you focus on the essential and do what you say? Do you try to make things simple and dare to be original in what you say and do? And most of all, do you excel in providing exceptional service every day?

We are looking for an



E2E Network Performance Engineer


not afraid of complex E2E issues needing detailed investigation and cooperation with the rest of the engineering teams in order to fix them.


Your duties

  • Troubleshoot and fix complex multivendor E2E network issues
  • Process and analyse UE, radio and core network traces
  • Manage the resolution of the customer complaints.
  • Focus on B2B customer complaint investigation, troubleshooting and resolution, especially voice related issues.
  • Synthetize and prepare presentations to share the outcome of the technical investigations with the B2B division.
  • Occasionally, represent Salt as technical expert in meetings with the customer.
  • Contribute to improve Salt results in Connect yearly benchmarks

What you bring

  • Degree in telecommunications or equivalent
  • Expert in mobile core network with at least five years’ experience
  • In depth knowledge of E2E voice callflows (CS & IMS & Radio)
  • In depth knowledge of 3GPP protocols: Core network CS, PS and IMS domains e.g. SS7, MAP, GTP, Diameter, SIP/RTP/RTCP etc.
  • Very good knowledge on voice E2E issues leading to drops or network accessibility degradation
  • Very good knowledge in voice quality troubleshooting – mute calls
  • Mastery of Wireshark, network probes (Anritsu is a plus), core network and radio internal network element traces
  • You have intuition to direct the investigation towards the root cause of the problem rather than investigating side effects
  • Good knowledge of standard internet protocol suite (TCP/IP)
  • Knowledge and experience in E2E PS performance troubleshooting is a plus
  • Knowledge and experience in radio issue troubleshooting is a plus
  • Experience with Nokia core network products is a plus
  • Good analytical and abstract thinking skills: Able to find innovative solutions to complex problems. Team worker. Willing to make a contribution and to make a difference. Does not give up until the issue is fixed.
  • Self-learner, Self-driven, Self-motivated.
  • Very good presentation & communication.
  • Easily approachable, friendly, & proactive in identifying areas for improvement
  • Required languages : English. German or French are a plus


What we offer

  • Friendly and dynamic environment
  • Competitive salary and benefit system
  • Possibility to enlarge competences and experience due to fast moving and complex telco environment


Always dreamed of having a job in a diverse and refreshing environment? Then we really need to meet. Please apply online (we only accept online applications).



  • Salt Mobile SA

No recruitment agencies please