Lead QA Engineer — Network Protocols

7 days ago

Mumbai, Maharashtra, India Pert Telecom Solutions Full time ₹ 15,00,000 - ₹ 25,00,000 per year

Location:
Navi Mumbai (Vashi)

Employment Type:
Full-time

Reports to:
VP – R&D

Role Summary

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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