We are looking for a Lead Security Engineer
- Vulnerability Response to join our Web Protection Team.
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.
Check out our website for more information: cloudlinux.
ComImunify360 Security Suite is an innovative security solution designed specifically for shared and VPS/Dedicated servers. The automated, easy-to-use solution with the six-layer approach to security delivers comprehensive and complete attack prevention.
The challenge aheadWhen a critical vulnerability in a popular web application or WordPress plugin goes public, attackers start exploiting it within hours. Most site owners can't patch that fast. We want our customers protected before the first attack reaches them, and we want them to know it.
That's the challenge we're hiring for:AI-driven vulnerability response. Build and run a pipeline that detects new high and critical vulnerabilities, generates WAF rules with AI assistance, validates them, and ships them to production in a short windowProtection plus public announcement, both automated. The same pipeline that ships the rule also produces the public advisory. Every critical vulnerability we cover is announced soon after the rule ships, so customers and the market see that Imunify closed it firstBuild on what works. An AI-assisted pipeline already runs for our WordPress protection plugin. The first big project is to extend this approach to ModSecurity/Coraza WAF rulesSpeed without breaking sites. On shared hosting,



a rule that blocks legitimate traffic is a customer incident. Fast and precise both matterMake it measurable. Time-to-protection, coverage of critical vulnerabilities, and false-positive rate are the numbers this role ownsAbout The RoleYou will own the vulnerability response pipeline end to end and be its main builder. You combine deep web application security expertise with strong automation skills, and you think about the product: what customers need, what to measure, what to build next. You'll lead a small team of security analysts and work closely with automation, QA, and marketing.

What You'll Do
Design and build the AI-driven pipeline from disclosure to announcement: vulnerability intake, triage, rule drafting, testing, release, and the public advisoryLead the extension of our existing WordPress-plugin pipeline to ModSecurity/Coraza rulesWrite and review WAF rules (ModSecurity/SecLang) for real-world web vulnerabilitiesBuild test harnesses that check rules against exploits and real traffic before releaseLead and mentor security analysts: set priorities, review their work, remove blockersDefine and track time-to-protection, coverage, and false-positive rate, and improve themAutomate advisory generation as part of the pipeline, and agree the format and review flow with marketingRequirementsWhat we're looking for:5+ years in web/application security: vulnerability research, detection engineering, WAF engineering,



or similarDeep understanding of web attack classes (SQLi, XSS, RCE, auth bypass, path traversal, file upload, deserialization) and how to detect them in HTTP trafficHands-on experience writing WAF rules (ModSecurity/SecLang, OWASP CRS, or similar) and regular expressionsAble to read PHP code and understand a vulnerability from an advisory or a patch diffStrong Python: you've built automation pipelines that run in production. CI/CD and automated testingHands-on daily use of AI/LLM tools; you know where to trustthem and how to verify their outputProven track record of leading a technical project end to endProduct mindset: you reason about customer impact, not only technical correctnessUpper-intermediate English or betterNice to have:WordPress ecosystem security: plugin vulnerabilities, vulnerability feeds (Wordfence, Patchstack, WPScan), CVE credits or bug bountyCoraza or other WAF enginesExploit analysis or threat intelligence backgroundLinux server administration, hosting industryPersonal

skills:
Strong ownership: you take a goal, not a task listSee the whole process and find the bottleneck, not only fix individual issuesCommunicate clearly and raise risks earlyCalm under pressure: critical vulnerabilities don't wait for

working hours
Comfortable making decisions with incomplete informationBenefitsWhat's in it for you?A focus on professional developmentInteresting and challenging projectsFully remote work with adaptable

working hours
, that allows you to schedule your day and work from any location worldwidePaid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leavesCompensation for private medical insuranceCo-working and gym/sports reimbursementBudget for educationThe opportunity t

📌 Lead Security Engineer (Málaga)
🏢 CloudLinux
📍 Málaga