Reliance Jio posted a Graduate Engineer Trainee role in Mumbai on 5 November 2026 (job ID 87566562). It is open to freshers with a B.E. or B.Tech, and the work sits in the telecom core network, the part of the system that handles subscribers, calls and data sessions behind the towers.
Role Overview
The posting lists experience as "Fresher" and the education requirement as B.E./B.Tech. It does not state whether this is a fixed-term traineeship or leads to a permanent role, and it does not list salary.
Responsibilities
- Support the design of the core network architecture.
- Coordinate with device and product teams on 4G, 3G and roaming requirements.
- Support day to day operation of 2G, 3G and 4G core networks.
- Monitor core network KPIs.
- Handle subscriber provisioning.
- Validate authentication and charging systems.
- Run interconnect and roaming tests.
- Analyse call flow and signalling issues.
- Troubleshoot core alarms and outages.
- Document configurations.
- Work with RAN and transport teams.
- Support upgrades and rollout of new nodes.
Requirements
- B.E./B.Tech degree, fresher level.
- Basic knowledge of 2G, 3G and 4G networks.
- Basics of signalling protocols.
- Analytical and troubleshooting skills, and the ability to read network KPIs.
- Basic IP networking and familiarity with telecom standards.
- Good communication and teamwork.
What the role involves
Most of this job is watching and fixing a live network. You would likely spend time reading dashboards, tracing why a call failed by following signalling messages, and helping senior engineers during upgrades. Expect some of it to be repetitive monitoring and some of it to be urgent when an alarm fires. Documentation is part of the list, so tidy notes matter.
Who it suits
It suits ECE, EEE and CS students who liked computer networks or telecom subjects and are happy working with protocols rather than writing apps. If you want a pure software developer role, this is not it.
How to stand out
- Brush up on how a call or data session is set up across the core, and be able to explain it simply. Interviewers will likely ask about signalling and the difference between 2G, 3G and 4G cores.
- Revise IP networking basics: addressing, routing and common protocols.
- Mention any lab, mini project or certification on networking or telecom, even a small one.
- Show you can reason through a fault step by step, since troubleshooting is central to the role.
Check before you apply
- No salary or perks are listed.
- No closing date is shown, so apply soon.
- The page asks you to update your profile and upload a resume on the Jio careers portal before applying.
- Location is Mumbai. Confirm whether relocation support exists before accepting.
- Clarify the contract type and trainee duration if you get an offer.
