Core Network Engineer

A vacancy for the post of Core Network Engineer is open at Renrui Lanka Services (Pvt) Ltd (Colombo). This is a full-time position.

What the job involves:
- Perform end-to-end troubleshooting and root cause analysis of mobile Core Network
- issues, including call trace analysis using Wireshark or similar tools
- Provide Level 2 and Level 3 technical support for Core Network technologies, including
- CS, PS, IMS, and VoLTE environments
- Execute firmware upgrades, hardware updates, configuration changes, and maintenance
- activities for network elements, controllers, and routers

Tip from JobPortal: For technical posts, mention your NVQ, diploma or degree and the machines, tools or projects you have worked with. For IT jobs, a short list of your projects or a GitHub/portfolio link helps your application stand out.

- Bachelor's degree in Telecommunications, Electrical Engineering, Computer Science, or a
- related engineering discipline
- Experience in mobile Core Network engineering, operations, and troubleshooting, with
- hands-on knowledge of CS, PS, IMS, and VoLTE environments
- Strong understanding of 3GPP standards and protocols, with experience working on core
- network elements such as MME, SGW, PGW, AMF, SMF, UPF, and DNS
- Proficiency in network monitoring, packet analysis (e.g., Wireshark), and basic automation
- using Python or Bash scripting