Senior Backend Engineer

Be part of the team that defends the networks the world depends on Corelight defends the world’s most sensitive networks—from global commerce to national defense—quietly, relentlessly, and with resolve. As cyber threats grow faster and smarter, we serve as the trusted force behind network resilience, putting elite defense within reach. By transforming digital footprints from physical, virtual, and cloud networks into actionable insights, we empower defenders to illuminate blind spots and stay ahead of an evolving threat landscape. Built on open-source innovations and fueled by industry leading agentic AI technology, Corelight helps teams to detect advanced threats and close cases with unprecedented clarity and precision. As a Senior Backend Engineer for our Fleet team, you will be a technical architect behind the systems that power our Open NDR Platform. You will bridge the gap between complex network data and seamless user experiences by overseeing the development of our centralized management platform. By leading high-impact projects and collaborating across functions, you will ensure that our platform provides defenders with the intuitive tools they need to disrupt attacks in real-time. Specific Responsibilities: Drive End-to-End Architecture: Lead the technical design, implementation, and operation of a centralized Sensor management platform known as Fleet. Responsible for Sensor lifecycle management, configuration, and real-time communication. Build High-Performance APIs: Design and develop REST and GraphQL APIs to power service to service communication, enable top-notch user experience, and manage configurations through various supported authentication models. Technical Leadership & Mentorship: Provide mentorship to other engineers through design guidance, rigorous code reviews, and the promotion of performant, maintainable coding standards. Security-First Engineering: Evaluate new projects and architectural changes for security implications, working closely with cross-functional teams to mitigate risks while balancing value and effort. Operational Excellence: Own the lifecycle of your features from design to production, implementing automated test suites, CI/CD pipelines, and proactive monitoring/alerting mechanisms. UX & Product Collaboration: Partner with UX design teams and Product Managers to refine epics and translate wireframes into backend requirements for complex user flows. Threat Intelligence Orchestration : Manage and distribute threat intelligence feeds (Zeek Intel, Suricata, Yara, etc.,) Knowledge/Skills/Abilities needed to be successful: Core Values Alignment: You embody "low ego results," "tireless service," and "applied curiosity" in every interaction. Product & User Empathy: You care deeply about building backend systems that help users understand complex data quickly and make thoughtful tradeoffs in service of usability. Systems Thinking: You think beyond individual components, understanding how backend state, data, and API architecture work together across a large application. Decisive Problem Solver: You can weigh conflicting constraints and make rapid, high-impact decisions in a fast-paced, dynamic environment. Strategic & Technical Communication: You thrive in a collaborative environment, using your communication skills to influence product direction, align distributed teams, and influence technical outcomes. Engineering Craft: You take pride in writing clear, well-structured, and maintainable code, prioritizing long-term quality and code health. Qualifications/Requirements: Professional Experience: 8+ years of professional software development experience, primarily on Linux or Unix-style platforms, with a track record in senior or lead roles. Technical Proficiency: Deep expertise in Golang including experience with multi-threaded applications in production. API Standards: Proven experience with formal API specifications such as OpenAPI. Database & Data Mastery: Proficiency with both Relational (SQ