Senior Software Engineer

Dragos, Inc. is a global leader in xOT cybersecurity, focused on protecting critical infrastructure systems. The Senior Device Engineer will be responsible for building software that interacts with network-connected devices, automating actions, and contributing to the core systems that support this automation.

Responsibilities:

• Design, build, and ship production software for identifying, fingerprinting, and interacting with network-connected devices across embedded, IoT, and OT/ICS endpoints
• Build and maintain features within the shared frameworks and services that device support is built on, from design through testing and maintenance
• Contribute to migrations and re-architectures of existing systems
• Figure out how devices communicate (undocumented web interfaces and protocols, network traffic captures, hands-on experimentation) and turn that into automated, supported product capabilities
• Troubleshoot complex device issues in production, including hard-to-reproduce and protocol-level problems
• Leverage AI tools and coding assistants as a core part of your day-to-day workflow, including research, code generation, debugging, test creation, and documentation
• Write and maintain automated test cases and frameworks that ensure the integrity of our device coverage
• Mentor other engineers and contribute to code reviews and design discussions
• Collaborate cross-functionally with product, security research, threat research, and customer-facing teams to translate field needs into engineering outcomes

Requirements:

• 5+ years of experience as a software engineer, with a track record of shipping production systems
• Strong expertise with developing and debugging in Node.js, with strong fundamentals in modern JavaScript/TypeScript
• Experience with Go is strongly valued
• Strong network protocol analysis skills: interpreting traffic captures, reconstructing device behavior, working out undocumented or vendor-specific protocols, and turning what you find into patterns and fingerprints (regex and the like)
• Proficiency with relational databases
• Solid command of Unix/Linux environments, including systems-level debugging and performance analysis
• Working proficiency with Docker and containerized development and deployment workflows
• Solid understanding of network transport and application layer protocols (TCP/IP, TLS, HTTP, common auth schemes, and common embedded/industrial protocols)
• Experience using AI coding tools effectively, and judgment about when not to trust them
• Good communication and collaboration skills, with the ability to work effectively in a fast-paced, evolving, remote-first environment
• Experience applying cybersecurity best practices, including secure coding, data protection, and awareness of common threats and vulnerabilities
• experience with ICS/OT environments
• embedded systems
• xIoT device security