 
						Lead QA Engineer — Network Protocols
7 days ago
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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