Senior QA Engineer Networking and Physical Layer

Project Description

Product verification & testing for an L1-L3 Traffic Generator Solution for a Global Networking Testing and Validation equipment provider. Our team: A team of networking enthusiasts willing to contribute to customer success. Technologies used:
Networking protocols, traffic generation tools, Windows/Linux servers, network virtualization, network management tools, microservices. Opportunities:
Networking and testing certifications, collaboration with an international team of professionals, working with the latest networking technologies and concepts, access to trainings.

• Execute manual, exploratory and automated test cases for Ethernet network equipment at the physical L1 and data link L2 layer of the OSI stack
• Design and execute ethernet physical layer test cases covering MAC/PCS/FEC state, link negotiation, BER counters, port state transitions, transceiver operation and error counters
• Validate alarm handling, fault isolation, and event monitoring capabilities of the product against real world telecom network scenarios (including outage impact analysis and incident management workflows)
• Perform acceptance and commissioning-style testing for L0/L1 features, reproducing complex lab scenario
• Analyze QoS and performance metrics at the transport/packet domain level; validate the product's ability to measure and report on delay, jitter, packet loss, and load-balancing across L0/L1 links
• Validate Network Management System (NMS) integration and interoperability scenarios with multivendor optical and transport equipment
• Reproduce and root-cause hardware and firmware defects through systematic test isolation at the PHY level
• Analyze test failures, capture logs, and document defects with clear reproduction steps in the issue tracker
• Collaborate closely with hardware and software development teams to triage failures and drive quality improvement
• Derive test requirements from hardware validation reports and functional test specification
• Support traffic generator setup and execution (Spirent, Ixia) for link-level and stress testing
• Contribute to CI/CD test integration for automated regression coverage of physical-layer test suites

• Strong practical experience in working with networking domain related applications, 5+ years (debugging, troubleshooting, integration)
• Solid understanding of wired telecom physical layer transmission technologies: SDH, PDH, DWDM, Ethernet/Gigabit Ethernet, VLANs, and Fiber Optics — ideally gained from hands‑on work in a Telco operator or transmission engineering environment
• Experience with E2E transport service testing: circuit provisioning/validation, acceptance testing, and fault isolation across multivendor environments including alarm handling and outage impact analysis
• Experience monitoring and analyzing QoS/KPI indicators for transport and packet domains (latency, jitter, availability, SLA compliance)
• QA experience in an Agile/SCRUM team with both manual and automated testing; experience in performance, scale, and convergence testing at system level
• Ability to develop and publish solution validation documents and test reports
• Strong verbal and written communication skills; able to communicate effectively across QA and Development teams
• Highly motivated, self‑driven, and able to collaborate cross‑functionally to meet challenging goals

• Automated Testing for UI, API, or CLI (1+ years)
• Knowledge Linux OS variants (Ubuntu, Debian)
• CI/CD (Jenkins, Git Lab, or similar) and issue tracking tools (JIRA, Confluence)
• Experience with transmission Network Management Systems (NMS), e.g., Huawei iManager, Alcatel‑Lucent Photonic Manager, or equivalent
• Hands‑on knowledge of optical and transport equipment or equivalent multivendor transmission hardware
• OTDR testing and fiber optic measurement experience
• Certification or formal training in transmission technologies: SDH, DWDM, CCNA, or equivalent