Senior QA Engineer with Networking and Physical Layer

About the Position

We're seeking a Senior QA Engineer with Networking and Physical Layer expertise to join our team in Remote Romania, focusing on testing and validating networking equipment.

Responsibilities

• 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 scenarios.
• 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 improvements.
• Derive test requirements from hardware validation reports and functional test specifications.
• 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.

Requirements

• Must have

  • 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.

• Nice to have

  • Automated Testing for UI, API, or CLI (1+ years).
  • Knowledge of Linux OS variants (Ubuntu, Debian).
  • CI/CD (Jenkins, GitLab, 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.

We Offer

• Opportunity to work remotely from Romania.
• Competitive salary and benefits package.
• Collaborative and innovative work environment.
• Access to the latest networking technologies and concepts.
• Opportunities for professional development and certifications.

About the Company

Luxoft is a global leader in digital transformation and technology services, dedicated to helping clients innovate and succeed in a rapidly changing world. Our team of networking enthusiasts is committed to customer success and continuous improvement.

Apply Now

Interested candidates are encouraged to apply with their updated resume and cover letter detailing their relevant experience and skills.