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Senior QA Engineer - DPI
Hyderabad · Senior
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Job description
Life at Plume
At Plume, we believe that technology isn't about moving faster, it's about making life’s moments better. Which is why we’ve built the world's first, and only, open and hardware-independent service delivery platform for smart homes, small businesses, enterprises, and beyond. Our SaaS platform uses WiFi, advanced AI, and machine learning to create the future of connected spaces—and human experiences—at massive scale.
We now deliver services to over 60 million locations globally and have managed over 3 billion devices on our platform. We’re expanding rapidly, pioneering a new category, and we achieved our Series F funding in just four years. Our customers include many of the world's largest Internet Service Providers (ISPs) who look to Plume to help them evolve their smart home offerings while gleaning insights from their own data.
With a bias for action and a love for being trailblazers, the team at Plume embodies a combination of relentless curiosity and imaginative innovation. We challenge ourselves to think in ways that other companies don't, work to do what should be done (rather than what can), and if we can’t do it exceptionally well, we don’t do it. It’s how we've assembled a team of world-class builders, thinkers, and doers. And it’s how we’re reinventing what’s possible every day.
This is a work-from-office / In-Office role based in our Hyderabad, India location.
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 & 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.
- Testing real-world client/router/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 (e.g., DNS tunneling, 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 & test the access control logic.
Qualifications
- 8+ 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 tunneling protocols.
- Hands-on with packet sniffers (e.g., Wireshark) and PCAP analysis.
- Solid grasp of firewall behavior, 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
Preferred Qualifications
- Familiarity with nDPI, Suricata or commercial DPI stacks.
- Exposure to MITM techniques, 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
Education:
Bachelor’s or Master’s degree in Computer Science, Computer Engineering, Information Systems, or a related technical field, or equivalent practical experience.
About Plume
As the creator of the only open, hardware-independent, cloud-controlled experience platform for ISPs and their subscribers, Plume partners with over 400 ISP customers, including some of the world’s largest such as Charter, Liberty Global, and J:COM.
Using OpenSync, the most widely supported open-source, silicon-to-cloud framework for smart spaces, Plume’s software-defined network allows ISPs to decouple their service offerings from hardware and rapidly curate and deliver new services over a multi-vendor, open-platform architecture.
Plume is an equal opportunity workplace that maintains a continuing policy of nondiscrimination in all employment practices and decisions, ensuring equal employment opportunities for all qualified individuals without regard to race, color, creed, religion, sex, national origin, age, physical or mental disability, sexual orientation, gender identity, marital status, pregnancy, childbirth or related individual conditions, medical conditions (as defined by state law), military or veteran status, or any other characteristic protected by federal, state or local law.
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