Calix - Threat Research / Network Detection Job Calix - Threat Research / Network Detection Calix provides cloud platforms, software, systems and services for communications service providers. In this role you will work with security engineering and threat intelligence teams to develop, validate and research network intrusion detection capabilities — improving detection signatures, researching emerging threats, and enhancing internal threat intelligence processes. About the Role Collaborate with security engineers and threat researchers to support development and validation of network-based detection logic, perform packet-level analysis, develop and test detection signatures for IPS/NIDS, and improve research workflows through automation and tooling. Key Responsibilities Collaborate with threat researchers and security engineers to analyze network-based attacks and create detection logic. Perform packet-level analysis using PCAPs and tools such as Wireshark or Zeek. Develop and test detection signatures for IPS/NIDS systems (Suricata/Snort or similar). Build and enhance internal tools and automation using Python to accelerate research workflows. Conduct OSINT for emerging threats, IoCs and TTPs to inform detection efforts. Create technical documentation, threat reports and playbooks. Participate in technical discussions throughout the signature development lifecycle. Build simulated attack scenarios to validate detection capabilities. Qualifications Graduated or final-year student of Bachelor's or Master's (2024/2025) in CS, IT, Networking or Cyber Security. Strong understanding of Computer Networking, TCP/IP stack, OSI model and IDS concepts. Familiarity with Cyber Threat Intelligence, MITRE ATT&CK, malware delivery methods and IoCs. Programming skills (Python preferred) to automate analysis and build small utilities. Comfortable on Linux and Windows environments. Experience or coursework in Network Security, Packet Analysis or Cybersecurity is desirable. Good communication, attention to detail and strong research aptitude. Location & Work Model India — Flexible hybrid model. Work from the Bangalore office for 20 days in a quarter (approximate). Key Skills Primary Secondary / Tools Network & Packet Analysis (PCAP, Wireshark, Zeek) Suricata, Snort, tcpdump Intrusion Detection / IPS / NIDS OSINT, MITRE ATT&CK, IoC research Python scripting & automation Linux & Windows environment familiarity Threat research & simulated attack validation Technical writing: playbooks, reports, docs Education & Eligible Batch Qualification Eligible Batch Bachelor's or Master's in CS / IT / Networking / Cyber Security 2024, 2025 Why Join Contribute directly to real-world threat detection, work with experienced security teams, build tooling and automation used by analysts, and help evolve an operator-focused detection capability for communications service providers. How to Apply Include a concise CV and a short note describing relevant coursework or projects (packet analysis, IDS work, Python automation or threat research). Links to GitHub, GitLab or sample PCAP analyses are a plus.