Cybersecurity Software Engineer

Calix provides the cloud, software platforms, systems and services required for communications service providers to simplify their businesses, excite their subscribers and grow their value.

We are seeking a skilled Cybersecurity Software Engineer to develop innovative solutions for identifying patterns in IP network traffic. In this role, you will analyze web resources and field data. You will apply protocol knowledge and create detection signatures to classify protocols, applications, devices, and network security threats within home and small business networks. Success in this position means delivering high-accuracy detection methods that enhance security and network intelligence. You’ll play a critical role in strengthening our cybersecurity capabilities while working with a team of experts at the forefront of network security. If you thrive on solving complex problems and making a tangible impact in cybersecurity, this is the perfect opportunity for you.

It’s an exciting time to join Calix as we’re working together to imagine and create the broadband experience that the world needs – and wants. Our team is growing and we’re looking for a Software Engineer to join our Cyber Security team.

Responsibilities and Duties:

• Analyze TCP/IP network traffic to identify patterns and anomalies.
• Develop and refine detection signatures to classify protocols, applications, and devices.
• Leverage web and field data to improve network visibility and security
• Collaborate with cross-functional teams to integrate detection capabilities into embedded networking products.
• Develop automated systems to identify emerging applications, devices and security threats.
• Optimize detection methods for accuracy, efficiency, and scalability.

Qualifications:

• Bachelor’s degree in Engineering, Computer Science, Cybersecurity, or related field.
• 2+ years of experience in network traffic analysis, cybersecurity, and software development.
• Proficiency in TCP/IP networking, network protocols, and packet analysis.
• Strong programming skills in Python, C or C++ for network traffic processing, and analysis.
• Familiarity with tools like Wireshark, tcpdump, Bro/Zeek or NetFlow.
• Understanding of deep packet inspection (DPI) and network fingerprinting techniques.
• Strong analytical and problem-solving skills.
• Ability to work independently and collaborate with cross-functional teams.
• Excellent communication skills to document findings and present technical concepts clearly.