QA Engineer (DPI) - Contract

As a QA Engineer (DPI) at Plume, you'll ensure the functionality and performance of our edge security products. You'll work with Dev and Automation teams to develop and execute comprehensive test plans, identify and document bugs, and contribute to continuous improvements in our QA processes. This is an in-office role based in Hyderabad, India.

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 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, and 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

• 3+ 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 with 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

Plume is an open, hardware-independent cloud-controlled experience platform for ISPs and their subscribers, partnering with over 400 ISP customers including Comcast, Charter, Liberty Global, and J:COM. Built on OpenSync, an open-source silicon-to-cloud framework for smart spaces, Plume's software-defined network allows ISPs to decouple service offerings from hardware and rapidly deliver new services across a multi-vendor, open-platform architecture. The platform serves over 60 million locations globally and has managed over 3 billion devices.