QA Engineer

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

What you'll do

• Design and develop automated test cases for validating DPI (Deep Packet Inspection) engines and secure network traffic inspection
• Test real-world client, router, and cloud interactions for deep validation of L2–L7 network behavior
• 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 such as DNS tunneling, spoofing, and port scanning to evaluate detection effectiveness
• Leverage and extend DPI tools such as nDPI, Suricata, and Zeek for custom validation use cases
• Partner with firmware developers to validate and test access control logic

What you bring

• 5+ years of experience as an SDET, Security QA Engineer, or related role in networking or security domains
• Strong programming and scripting skills in Python for test automation and tooling
• Deep understanding of TCP/IP, UDP, DNS, TLS, HTTP/HTTPS, NAT, VPNs, and tunneling protocols
• Hands-on experience with packet sniffers such as Wireshark and PCAP analysis
• Solid grasp of firewall behavior, DPI concepts, SSL inspection, and secure communication protocols
• Strong debugging skills to spot design flaws, race conditions, and performance bottlenecks in complex architectures
• Ability to break software systems in creative and useful ways

Nice to have

• 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 such as OpenWRT, OpenSync, or embedded Linux
• Background in cybersecurity, network security, or traffic classification
• Experience testing cloud-native networking products

About Plume

Plume is the creator of the only open, hardware-independent, cloud-controlled experience platform for ISPs and their subscribers. The company partners with over 400 ISP customers, including some of the world's largest such as Comcast, Charter, Liberty Global, and J:COM. Plume delivers services to over 60 million locations globally and has managed over 3 billion devices on its platform.