4G/5G Core Test Engineer | Fubeus | Bengaluru

Fubeus; Bengaluru; On-site; INR 2,500,000 - 4,000,000; Full time

Job summary

Fubeus in Bengaluru is seeking a highly skilled 4G/5G Core Test Engineer to lead end-to-end validation of EPC and SA/NSA network functions in lab and cloud-native environments. You will own test architecture, execution, and automation, working with R&D teams to uncover defects and improve performance.

The role requires 6–10 years in telecom packet core testing, strong knowledge of 3GPP specs, and hands-on experience with Kubernetes, PFCP, GTPv2-C, Diameter, and Wireshark.

Qualifications

• Bachelor’s degree in Electronics and Communication, Telecommunications, CS, or related field.
• 6–10 years of telecom packet core testing experience.
• Strong knowledge of 4G EPC and 5G Core 3GPP specs.
• Hands-on testing with 5G SMF and 4G EPC nodes; Kubernetes experience.

Responsibilities

• Design, execute, and automate test plans for 4G/5G core functions.
• Validate end-to-end call flows, mobility, charging, and policy control.
• Deploy and troubleshoot containerized network functions on Kubernetes.
• Perform packet analysis with Wireshark/tcpdump and log investigations.
• Collaborate with R&D teams to triage defects and drive CI/test automation.

Skills

Packet core testing

Kubernetes

Test automation

CI/CD pipelines

Python / Robot Framework

Wireshark / tcpdump

3GPP specs

Education

B.E./B.Tech in Telecom/CS

Tools

Kubernetes

Wireshark

tcpdump

Spirent Landslide

IxLoad

Job description

Position Summary:

Fubeus is actively seeking a highly skilled, quality-driven 4G/5G Core Test Engineer to spearhead end-to-end system validation, functional verification, and automated testing of next-generation mobile packet core networks in Bengaluru. In this vital engineering role, you will hold technical accountability for validating mission-critical 4G Evolved Packet Core (EPC) and 5G Standalone (SA) / Non-Standalone (NSA) network functions within carrier-grade lab and cloud-native production environments. Leveraging 6 to 10 years of specialized experience in telecommunications packet core architectures, 3GPP standards, and cloud-native containerized platforms, you will partner with research and development teams to detect defects, optimize network performance, and drive test automation from day one. This position offers an outstanding career platform for an accomplished packet core testing professional to contribute directly to groundbreaking cellular telecommunications innovations.

Detailed Job Description:

As a 4G/5G Core Test Engineer at Fubeus in Bengaluru, you will be responsible for the comprehensive test architecture, deployment, execution, and performance benchmarking of complex mobile packet core systems. Working in close collaboration with R&D software developers, systems architects, telecom operators, and QA automation squads, you will bridge cellular signaling specifications with rigorous automated test execution.

Your core technical scope encompasses hands-on system testing, protocol conformance verification, and troubleshooting of specialized packet core network functions including 5G Session Management Function (SMF) and 4G EPC nodes such as Packet Data Network Gateway (PGW), Service Gateway (SGW), and System Architecture Evolution Gateway (SAEGW). You will deploy, configure, and validate containerized network functions running on Kubernetes clusters, analyzing end-to-end signaling call flows covering PDU session establishment, default/dedicated bearer activations, handovers, policy control (PCC), charging, and subscriber mobility in compliance with 3GPP specifications (TS 23.501, TS 23.502, TS 23.401, TS 23.402). Utilizing packet analysis tools including Wireshark and tcpdump, you will conduct granular log investigations across PFCP, GTPv2-C, Diameter, SCTP, and HTTP/2 RESTful interfaces. Additionally, you will champion automated test frameworks from day one and leverage AI-assisted development tools to enhance testing productivity, defect detection, and overall software reliability.

Key Responsibilities:

• Design, author, execute, and automate comprehensive test plans and test suites for 4G EPC and 5G Core network functions.
• Perform hands-on system testing, feature validation, and stability testing on 5G SMF and 4G PGW, SGW, and SAEGW network elements.
• Deploy, configure, manage, and troubleshoot containerized packet core network functions within Kubernetes-based virtualized lab environments.
• Validate end-to-end call flows, session management, mobility procedures, charging, policy control, and subscriber registration across LTE, NSA, and SA topologies.
• Conduct deep packet inspection and signaling log analysis utilizing Wireshark, tcpdump, and telecom test tools across PFCP, GTPv2-C, Diameter, SCTP, and HTTP/2 protocols.
• Collaborate actively with R&D software engineering teams to triage defects, conduct root cause analysis (RCA), and track issues to successful closure.
• Drive test automation from Day 1 by developing and maintaining automated test scripts and integrating them into continuous integration (CI) pipelines.
• Leverage artificial intelligence (AI) tools and modern testing methodologies to enhance test coverage, engineering quality, and operational productivity.

Required Qualifications & Skills:

• Bachelor’s degree in Electronics and Communication, Telecommunications Engineering, Computer Science, or a related technical field.
• Between 6 to 10 years of dedicated professional experience in telecommunications packet core system testing and quality assurance.
• Strong, demonstrated working knowledge of 4G EPC (TS 23.401, TS 23.402) and 5G Core (TS 23.501, TS 23.502) 3GPP architectural specifications.
• Extensive hands-on system testing experience with 5G SMF and 4G EPC nodes (PGW, SGW, SAEGW).
• Proven experience deploying, configuring, troubleshooting, and validating packet core network functions in lab or live production environments.
• Demonstrated hands-on technical competence working within Kubernetes-based containerized platforms and Linux operating systems.
• In-depth technical understanding of core telecom protocols: PFCP (N4), GTPv2-C, Diameter, SCTP, and HTTP/2 REST APIs.
• Strong technical analytical skills with extensive expertise using Wireshark and tcpdump for complex protocol decoding and log analysis.

Nice-to-Have Skills:

• Demonstrated expertise building automated test frameworks utilizing Python, Robot Framework, or PyTest for packet core network testing.
• Hands-on experience with commercial telecom traffic simulators and load testing tools (e.g., Spirent Landslide, Keysight IxLoad, or Polaris).
• Familiarity with other 5G Core network functions such as AMF, UPF, PCF, NRF, and UDM architectures.
• Experience operating within CI/CD automated pipeline environments utilizing Jenkins, Git, or GitLab.
• Immediate availability or ability to join on short notice in Bengaluru.

Application Information:

• Employer: Fubeus (Innovation to Realization)
• Recruiter Contact: Sindhu Kori (Associate Manager Human Resources)
• Position Title: 4G/5G Core Test Engineer
• Work Location: Bengaluru, Karnataka, India
• Experience Required: 6–10 Years
• Notice Period: Immediate to Short Notice Joiners Preferred
• Employment Type: Full Time
• Application Email: [e-mail]
• Key Technology Focus: 4G EPC (PGW, SGW, SAEGW), 5G Core (SMF), Kubernetes, 3GPP Specs, PFCP, GTPv2-C, Diameter, SCTP, HTTP/2, Wireshark, and Test Automation

Recruitment Pro Tip:

To capture immediate priority with Fubeus’s recruitment team, ensure your resume showcases your hands-on validation expertise with 5G SMF and 4G PGW/SGW elements, highlighting specific 3GPP standards (TS 23.501/502 and TS 23.401/402) and protocols (PFCP, GTPv2-C, HTTP/2) you have tested. Explicitly mention your test automation experience (such as Python or traffic simulators like Spirent Landslide), note your Kubernetes proficiency, and highlight your short notice period or immediate joining availability when emailing [e-mail].