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Lead Software Development Engineer in Test, Sensor



Software Engineering
United States · Canada · Mexico
Posted on Friday, May 10, 2024

By making evidence the heart of security, we help customers stay ahead of ever-changing cyber-attacks.

Corelight is the cybersecurity company that transforms network and cloud activity into evidence. Evidence that elite defenders use to proactively hunt for threats, accelerate response to cyber incidents, gain complete network visibility and create powerful analytics using machine-learning and behavioral analysis tools. Easily deployed, and available in traditional and SaaS-based formats, Corelight is the fastest-growing Network Detection and Response (NDR) platform in the industry. And we are the only NDR platform that leverages the power of Open Source projects in addition to our own technology to deliver Intrusion Detection (IDS), Network Security Monitoring (NSM), and Smart PCAP solutions. We sell to some of the most sensitive, mission critical large enterprises and government agencies in the world.

As the lead Software Development Engineer in Test (SDET) in the Sensor group at Corelight, you will utilize your strong network security and development skills to design, develop and utilize test frameworks, test tools, and automation. You will define, implement, and analyze metrics to determine test effectiveness and the overall quality of software. You are a hands-on network security QE leader providing technical leadership to a team of 15 testing engineers. This position requires collaborating with the devops, build engineers and product developers to ensure the tools you create and maintain support to the full team. The ideal candidate will look to reuse and adapt modern solutions from the security, network, infrastructure and SQA communities.

Role includes:

  • Architecting and implementing test automation frameworks for network security products for offshore automation team
  • Lead system testing of Corelight appliance products including cloud sensors.


  • 3+ years professional experience creating test automation frameworks and tool
  • 2+ years network security experience
  • 3+ years professional coding experience in Python
  • Pytest, Behave or equivalent testing tool experience in another programming environment
  • Ixia or Spirent traffic generators experience
  • Git source control
  • Developing software and testing solutions in a shift left Agile environment

Preferred Experiences

  • Zeek, Snort and/or Suricata
  • Knowledge of Linux/RHEL
  • Experience with logging, data and event management solutions (SEIM): Splunk, Elastic/ELK, Kafka.
  • Virtual (VMware) or Cloud (AWS, GCE, Azure)
  • Applying different software testing techniques, such as equivalence class partitioning, boundary value testing, pairwise testing, etc.
  • Some performance/ scalability / reliability (PSR) testing is also preferred (e.g. JMeter)

    We are proud of our culture and values - driving diversity of background and thought, low-ego results, applied curiosity and tireless service to our customers and community. Corelight is committed to a geographically dispersed yet connected employee base with employees working from home and office locations around the world. Fueled by an accelerating revenue stream, and investments from top-tier venture capital organizations such as Crowdstrike, Accel and Insight - we are rapidly expanding our team.

    Check us out at

Notice of Pay Transparency:
The compensation for this position may vary depending on factors such as your location, skills and experience. Depending on the nature and seniority of the role, a percentage of compensation may come in the form of a commission-based or discretionary bonus. Equity and additional benefits will also be awarded.

Compensation Range
$184,000$220,000 USD