5G RAN / O-RAN Testing Engineer (Protocol Testing & Python) | L&T Technology Services (LTTS) | Bangalore

L&T Technology Services (LTTS); Bengaluru; On-site; INR 1,000,000 - 2,000,000; Full time

Job summary

L&T Technology Services (LTTS) seeks experienced 5G RAN/O-RAN Testing Engineers for permanent on-site roles in Bangalore, India. You will own end-to-end testing, automation, log analysis, and cross-functional collaboration across PHY, MAC, and RRC layers.

Ideal candidates have 3–6 years of hands-on 4G/5G testing, 3GPP knowledge, and strong Python/Robot Framework skills. Immediate joiners preferred; multi-vendor exposure and growth opportunities are highlighted.

Qualifications

• 3–6 years of hands-on 4G/5G RAN testing experience.
• Strong knowledge of 3GPP procedures and wireless standards.
• Proficient in Python and Robot Framework for test automation.
• Experience with log analysis and root-cause troubleshooting across PHY/MAC/RRC.
• On-site work authorization and willingness to be stationed in Bangalore.

Responsibilities

• Design, develop, and execute test suites for 4G/5G RAN and O-RAN.
• Perform L1/L2/L3 protocol testing per 3GPP specs.
• Build and maintain automated test scripts using Python and Robot Framework.
• Analyze logs and inspect packets to troubleshoot network issues.
• Collaborate with software, test management, and QA teams.

Skills

5G RAN Testing

O-RAN Testing

Python

Robot Framework

Log analysis

Wireshark

Troubleshooting

Education

Bachelor's/Master's in Telecommunication/EC/CS

Tools

Jira

Confluence

ServiceNow

Docker

Kubernetes

Spirent/Keysight/R&S

Job description

Position Summary

Driving advanced wireless protocol testing, 5G RAN validation, and O-RAN testing excellence in Bangalore, India, L&T Technology Services (LTTS) is actively seeking experienced 5G RAN / O-RAN Testing Engineers for 3 open permanent full-time professional engagements with immediate to 7 days joiner availability. In this vital telecommunications testing role, you will take full operational, tactical, and technical ownership of 4G/5G RAN testing, O-RAN compliance validation, L1/L2/L3 protocol testing, 3GPP standards verification, Python and Robot Framework test automation, and comprehensive log analysis and troubleshooting. Bringing deep technical expertise in wireless protocol stacks (PHY, MAC, RRC) and automated test engineering, you will empower an elite global technology and engineering services corporation to achieve uncompromised network interoperability, flawless protocol compliance, and superior wireless product performance. This prestigious career opportunity offers competitive remuneration, multi-vendor client exposure, and professional growth within a leading global engineering and technology solutions corporation.

Detailed Job Description

As a 5G RAN / O-RAN Testing Engineer supporting L&T Technology Services (LTTS) on a professional on-site basis in Bangalore, India, you will take full operational, tactical, and technical ownership of wireless test execution, automation framework development, log analysis, and cross-functional engineering collaboration. Your day-to-day responsibilities include designing, developing, and executing comprehensive test suites for 4G/5G Radio Access Network (RAN) and O-RAN systems, performing rigorous L1, L2, and L3 protocol testing against 3GPP specifications, building and maintaining automated test scripts utilizing Python and Robot Framework, investigating complex network anomalies through detailed log analysis and root-cause troubleshooting across PHY, MAC, and RRC layers, collaborating proactively with software developers, test managers, and technical recruitment leadership like Avinash B C at LTTS, ensuring strict adherence to telecommunications testing standards.

Key Responsibilities

• Design, develop, and execute rigorous test plans and test cases for 4G/5G RAN and O-RAN network equipment.
• Perform advanced L1, L2, and L3 protocol testing and verification against 3GPP standards and procedures.
• Build, optimize, and maintain automated test scripts and frameworks utilizing Python and Robot Framework.
• Conduct detailed log analysis, packet capture inspection, and root-cause troubleshooting across PHY, MAC, RLC, MAC, PDCP, and RRC protocol layers.
• Validate O-RAN architecture components, fronthaul interfaces, and multi-vendor interoperability.
• Collaborate proactively with cross-functional software development, system integration, and quality assurance squads.
• Ensure strict adherence to telecommunications testing standards, performance benchmarks, and release schedules.
• Maintain meticulous test automation codebases, test execution reports, bug tracking logs, and technical runbooks.
• Participate actively in agile sprint planning, daily standups, and technical review workshops.
• Provide technical guidance and mentorship to junior test engineers across project teams.

Required Qualifications & Skills

• Bachelor’s or Master’s degree in Telecommunications Engineering, Electronics & Communication, Computer Science, or a related technical discipline.
• Minimum of 3 to 6 years of progressive professional hands-on experience in 4G/5G RAN testing and protocol verification.
• Strong, demonstrable operational expertise in O-RAN testing, 3GPP procedures, and wireless communication standards.
• Comprehensive working knowledge and practical hands-on experience with L1, L2, and L3 protocol testing.
• Solid practical programming proficiency in Python and Robot Framework for test automation.
• Proven expertise in log analysis, Wireshark packet inspection, and complex network troubleshooting.
• Strong analytical problem-solving skills and effective stakeholder communication capabilities.
• Mandatory legal work authorization and physical availability for professional on-site operations in Bangalore, India (immediate to 7 days joiners only).

Nice-to-Have Skills

• Professional vendor certifications such as ISTQB Advanced Test Analyst, AWS Certified Developer, or Cisco CCNA.
• Prior professional working experience supporting Tier-1 global mobile network operators (MNOs) or telecom equipment manufacturers (TEMs).
• Hands-on familiarity with test equipment (Spirent, Keysight, Rohde & Schwarz) and containerization platforms (Docker, Kubernetes).
• Experience utilizing enterprise agile tracking and IT service desk platforms (Jira, Confluence, ServiceNow).
• Active participation in 3GPP standards meetings, O-RAN Alliance working groups, or wireless engineering forums.

Application Information

• Recruiter: L&T Technology Services (LTTS) Recruitment Division
• Contact Name: Avinash B C (Sr Talent Acquisition Specialist)
• Salary/Rate: Market Competitive / Enterprise Telecom Engineering Package
• Work Schedule: On-Site Professional Operations (Bangalore, India)
• Deadline: Open until filled (Urgent 3 Openings – Immediate to 7 Days Joiners Only)
• Notice Period: Immediate to 7 Days Only
• Contract Duration: Permanent / Full-Time Employment