Security engineer

CloudLinux is a global remote-first company. We are driven by our principles: do the right thing, employees first, we are remote first, and we deliver high-volume, low-cost Linux infrastructure and security products that help companies to increase the efficiency of their operations. Every person on our team supports each other and does what we can to ensure we all are successful.

• Lead response to large-scale exploitation and malware campaigns: triage, root cause, and mitigation across every protection layer of the product
• Reverse-engineer malware and exploits targeting Linux servers and web applications
• Track campaigns over time, not just individual samples: cluster indicators, connect activity to known actors and toolkits, anticipate the next variant
• Define and run measurable outcomes per campaign: time to detect, time to protect, cleanup effectiveness, reinfection rate
• Own the security incident and response process, both for threats against our customers and for vulnerabilities in our own product: severity model, runbooks, communication, escalation
• Coordinate with external parties — software vendors, partners, CERTs/CSIRTs, abuse desks, other security vendors. Drive responsible disclosure where we find vulnerabilities
• Be the technical voice in security advisories and partner briefings, together with Product and Support
• Triage external vulnerability reports
• Red-team our product and infrastructure. Assume a capable attacker who already has a foothold
• Threat-model new features before they ship; own the security review gate for high-risk changes
• Turn findings into fixes with the owning teams, not just reports
• Raise the quality bar of detections: false-positive budgets, test corpora, staged rollout with measurement gates and fast rollback
• Build and automate the analysis pipeline: dynamic analysis, honeypots, telemetry-driven hunting, ML-assisted triage where it measurably helps
• Write production code for these tools; expect 30-50% of your time to be hands-on building
• Turn telemetry into intelligence: emerging exploits, attacker infrastructure, trends — shared as internal briefs and selected public research
• Mentor analysts and engineers; raise the security skill level across teams
• Bar-raiser in security hiring loops

• 10+ years in security engineering, malware research, incident response, or offensive security, with several years leading cross-team work at Staff/Principal/Lead scope
• Deep hands-on malware analysis and reverse engineering skills
• Strong web application security and practical exploitation experience
• Deep Linux knowledge from both the attacker's and the defender's side
• Proven incident response leadership on large-scale events: you have run the response, written the advisory, and closed the post-mortem
• Production coding in Python plus a systems language (Go, Rust or C)
• Experience with coordinated vulnerability disclosure and working with the security community
• Clear, short writing for both engineers and non-technical stakeholders; works well async across time zones
• Daily user of AI tools for analysis and coding, with critical judgment about their output
• Будет плюсом: Background in hosting or large web ecosystems; Detection authoring at scale (signatures, WAF/IDS rules); Kernel-level monitoring and rootkit detection; Threat intelligence practice and actor tracking; ML for malware classification; Public track record: CVEs, published research, talks, CTFs, open-source security tools; Relevant certifications are a plus, not a requirement

• Stay hands-on technically while owning complex, high-impact engineering work
• Work on challenging Linux, automation, and cybersecurity problems across mature and newer products
• Influence technical direction and make meaningful architectural decisions
• Work independently with a high level of ownership and autonomy
• Fully remote work with flexible working hours
• 24 paid vacation days, 10 national holidays, and unlimited sick leave
• Private medical insurance compensation
• Co-working and gym/sports reimbursement
• Education budget
• Opportunity to receive a reward for innovative ideas that the company can patent