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Security Engineer - Node.js Proactive Defense (worldwide remote, work anywhere)

1 month, 1 week ago
Spain, Bulgaria, Czech Republic, Poland, Portugal, Romania
Full-time
Lead
Research Scientist
Software Development
JavaScript Node.js PHP WAF WordPress
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CloudLinux

CloudLinux

CloudLinux is a leading provider of the CloudLinux OS, a platform for Linux web hosting that offers next-level performance and security. With a focus on optimizing web hosting environments, CloudLinux helps service providers improve density, stability,...

IT Services
51-250
Founded 2009
View All Jobs 9

Description

  • Define the product scope, including what to intercept, what not to intercept, and the customer-facing experience.
  • Choose the technical approach, including instrumentation strategy, deployment shape, and programming language.
  • Build and ship the runtime protection layer end to end.
  • Develop and refine detection logic and the methodology used to validate it.
  • Use CloudLinux’s existing threat intelligence and cross-layer signals where helpful.
  • Collaborate with architects while owning the technical direction of the product.
  • Measure and optimize the product against runtime overhead, false positives, false negatives, and customer escalations.
  • Work hands-on every day across research, engineering, and quality assurance.

Requirements

  • Familiarity with the Node.js runtime and the JavaScript ecosystem.
  • Strong web application security fundamentals and current knowledge of practical exploitation.
  • Understanding of how detection rules behave at scale without flagging legitimate code.
  • Ability to operate as PM, architect, lead engineer, and QA for a new product.
  • Comfort making independent decisions and asking for help or resources when needed.
  • Experience with AI coding agents and directing them to high-quality output (preferred).
  • Prior work on runtime-protection products, application firewalls, or instrumentation tooling (preferred).
  • Background in malware analysis or incident response (preferred).
  • Familiarity with managed-hosting environments (preferred).
  • Public security research, vulnerability disclosures, or authored detection rulesets (preferred).

Benefits

  • Fully remote work with flexible working hours and location independence worldwide.
  • Paid 24 days of vacation per year, plus 10 national holidays and unlimited sick leave.
  • Compensation for private medical insurance.
  • Co-working and gym/sports reimbursement.
  • Budget for education and professional development.
  • Opportunity to earn a reward for the most innovative patentable idea.
  • Interesting and challenging projects.

Interested in this position?

Apply directly on the company website

Apply Now

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