Senior QA Engineer - DPI

As a Senior QA Engineer - DPI at Plume Network, you'll ensure the functionality and performance of our edge security products. Working closely with Dev and Automation teams, you'll develop and execute comprehensive test plans for our Deep Packet Inspection engines, identify and document bugs, and contribute to continuous improvement of our QA processes. This is an in-office role based in our Hyderabad, India location.

What you'll do

• Design and develop automated test cases for validating DPI engines and secure network traffic inspection
• Test real-world client, router, and cloud interactions for deep testing 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, then 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

• 8+ years of experience as an SDET, Security QA Engineer, or related role in networking or security domains
• Strong programming and scripting 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 and ability to spot design flaws, race conditions, and performance bottlenecks in complex architectures
• Ability to break software systems in creative and useful ways
• Bachelor's or Master's degree in Computer Science, Computer Engineering, Information Systems, or a related technical field, or equivalent practical experience

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 Network

Plume Network 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 Charter, Liberty Global, and J:COM, using OpenSync, the most widely supported open-source, silicon-to-cloud framework for smart spaces. Plume serves over 60 million locations globally and has managed over 3 billion devices on its platform.