QA Automation Engineer (DPI)

As an SDET/Dev-QA Engineer at Plume, you'll play a pivotal role in ensuring the functionality and performance of our edge security products. Collaborating closely with Dev and Automation teams, you'll develop and execute comprehensive test plans, identify and document bugs, and contribute to the continuous improvement of our QA processes.

Responsibilities:

• Design and develop automated test cases for validating DPI (Deep Packet Inspection) engines and secure network traffic inspection.
• Test real-world client/router/cloud interactions for deep testing of L2-L7 network behaviour.
• Validate TLS/SSL traffic inspection and network traffic classification techniques.
• Write tests to ensure accurate handling of malformed packets, evasive traffic, and intrusion detection patterns.
• Simulate security vulnerabilities (e. g., DNS tunnelling, spoofing, port scanning) and evaluate detection effectiveness.
• Leverage and extend DPI tools (e. g., nDPI, Suricata, Zeek) for custom validation use cases.
• Partner with firmware developers to validate and test the access control logic.

Requirements:

• 3+ years of experience as an SDET, Security QA Engineer, or related role in networking/security domains.
• Strong programming/scripting in Python for test automation and tooling.
• Deep understanding of TCP/IP, UDP, DNS, TLS, HTTP/HTTPS, NAT, VPNs, and tunnelling protocols.
• Hands-on with packet sniffers (e. g., Wireshark) and PCAP analysis.
• Solid grasp of firewall behaviour, DPI concepts, SSL inspection, and secure communication protocols.
• Strong debugging skills: ability to spot design flaws, race conditions, and performance bottlenecks in complex architectures
• Ability to break software systems in creative and useful ways.
• Familiarity with nDPI, Suricata or commercial DPI stacks.
• Exposure to MITM techniques and threat simulation frameworks.
• Prior experience testing IoT or Wi-Fi edge devices (e. g., OpenWRT, OpenSync, embedded Linux).
• Background in cybersecurity, network security, or traffic classification.
• Experience in testing cloud-native networking products
• Bachelor's or Master's degree in Computer Science, Computer Engineering, Information Systems, or a related technical field, or equivalent practical experience.

Skills

DNS, DPI, Deep Packet Inspection, Firewalls, HTTP, Python, SSL, TCP/IP, TLS, UDP