Software Engineer III | Platform

Company: ExtraHop
Location: San Diego
Posted on: January 26, 2026

Job Description:

ExtraHop is reinventing Network Detection and Response (NDR) to help enterprises and organziations stay ahead of emerging threats with unmatched network visibility, context, and control. Today’s attackers bypass traditional security defenses through identity-based entry, move invisibly across cloud, on-premise, and data center networks using encryption and trusted applications, and exploit and exit whenever they want. But all of that movement is visible on the network if you can see it. By combining the power of NDR with Network Performance Management (NPM), Intrusion Detection Systems (IDS), and forensics in a single, integrated platform, ExtraHop can decrypt and unlock complete packet-level data at wire speed, analyze and correlate it across all your networks, applications, devices, and users with cloud-scale machine learning, and provide a single interface to the SOC to detect, investigate, and remediate modern cyber risks in real time. Position Summary We’re looking for a Software Engineer III to develop features and components and assist in leading junior team members, working at the foundation level of our appliances and cloud offerings. Our team designs and develops new features and builds fundamental tools and structures to enable creation of world-class security applications on physical, virtual, and cloud appliances. We develop, support, and secure the operating system, kernel, drivers, installation/upgrade process, and administrative and connectivity features. We work closely with feature owners on other teams to design and implement core support components. We offer an engaging and innovative environment in which people are encouraged and supported to collaborate on industry-leading technology and create a world-class engineering team, while they develop and enrich their individual growth.We believe in actively investing in a diverse engineering organization and are seeking highly talented software engineers from all backgrounds, who bring in their own perspectives, influences, and experiences. Are you as passionate as we are about positive culture and amazing technology? If so, we can’t wait to chat with you. Key Responsibilities • Be a part of a team that designs and builds the underlying platform support for appliances and the custom software that provides security visibility across an organization • Occasionally expand into other areas of engineering — we encourage and support full-stack flexibility • Collaborate with UX, PM, QA, and other engineering teams to define requirements, develop architecture, and implement new features • Maintain quality by participating in code reviews • Participate in agile development methodologies • Demonstrate traits in line with our company values (have a sense of humor, be nice to each other, think about customers first, build cool stuff) Required Qualifications • Bachelor’s degree in Computer Science, Engineering or a related field • 4 years working experience implementing backend infrastructure components on Linux/Unix • Experience in back-end languages such as Python, Golang, Rust, or C/C++ • Familiarity with cryptography principles, applications, and protocols such as TLS • Familiarity with navigating typical Linux server environments, including common tools, package management, and services • Familiarity with basic CPU, network, or storage performance analysis and tuning on Linux • Ability to lead or mentor other team members • Adherence to strong software engineering practices • Strong problem solving and communication skills • Work cooperatively with others within the organization and other cross-functional stakeholders. • Work well in fast-paced, high-stress environments. • Has predictable, reliable attendance. Preferred Qualifications • Experience with cloud platforms such as AWS, Azure, or GCP • Experience with Docker containers, CI pipelines, and other build tools • Experience with learning new network technologies, such as when adopting and configuring existing servers and client libraries to support new features • Basic experience using and/or administering an RDBMS such as PostgreSQL or MySQL • Exposure to authentication/authorization technologies such as SAML, OAuth, OIDC, Kerberos, or LDAP/Active Directory • Familiarity with developing, maintaining, or customizing a Linux/Unix-based OS for cloud, server, or embedded use cases • Exposure to security certifications such as FIPS 140, FedRAMP, Common Criteria, SOC2, PCI DSS, or HIPAA

Keywords: ExtraHop, El Cajon , Software Engineer III | Platform, IT / Software / Systems , San Diego, California