Lead QA Engineer — Network Protocols

5 days ago

Navi Mumbai, Maharashtra, India Pert Telecom Solutions Private Limited Full time US$ 1,00,000 - US$ 1,50,000 per year

Navi Mumbai (Vashi)

Full Time

6–9 Years

Job Description

We're hiring a Lead QA Engineer with deep hands-on experience in IP networking, protocol behavior, and Deep Packet Inspection (DPI). You'll own test design and execution for network appliances/services, verify protocol compliance, analyze pcaps, and drive performance/scale validation (throughput, latency, jitter, loss).

What You'll Do:

  • Design, author, and execute manual and automated test cases for L2/L3/L4–L7 features and DPI classification engines.
  • Validate core protocols: TCP, UDP, HTTP/HTTPS, FTP, DNS, DHCP, SIP, ICMP (plus negative/edge scenarios: retransmissions, fragmentation, timeouts, MTU/MSS, packet reordering).
  • Perform Deep Packet Inspection tests for signature accuracy, false-positive/negative rates, and protocol/APP identification.
  • Build and run performance/scale tests (throughput, CPS/SPS, concurrent sessions, latency/jitter/loss) using traffic generators.
  • Capture and analyze traffic with tcpdump/Wireshark/tshark; create precise capture/display filters, annotate traces, and file actionable defects with MRE steps and RFC references.
  • Automate routine/system tests using Python/Bash (e.g., scapy/pytest) and integrate with CI where practical.
  • Maintain lab setups: switches/routers/firewalls/network appliances; manage images, configs, topologies, and golden baselines.
  • Collaborate with Dev/PM/SRE on test strategy, coverage, and release criteria; contribute to test plans, exit reports, and risk assessments.
  • Ensure compliance with relevant RFCs/industry standards; document test evidence.

Must-Have Qualifications:

  • 6–9 years in QA for networking/telecom products (not web/app UI testing).
  • Strong grasp of OSI model, L2/L3, IPv4/IPv6, VLANs, NAT, routing basics; deep TCP internals (state machine, handshake, retransmission, flow/congestion control).
  • Practical DPI knowledge: signatures/classifiers, payload parsing, evasion/obfuscation scenarios.
  • Tools: Wireshark, tcpdump/tshark, iperf, and at least one traffic generator (Ixia/Keysight, Spirent, or equivalent).
  • Comfortable on Linux (iproute2, systemd, networking namespaces), shell scripting, and Python for test automation/log parsing/pcap handling.
  • Experience with Git, issue trackers (e.g., Jira), and test management.
  • Excellent defect reporting and communication skills.

Nice to Have:

  • Knowledge of firewalls/VPN/QoS/load balancers and security protocols (IPsec/TLS).
  • CI/CD and container networking (Docker/K8s), Robot/pytest.
  • Certifications: CCNA/CCNP, ISTQB (or equivalent).

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