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: We are currently hiring Staff Engineers for various projects within the Imunify360 product.
Imunify360 is CloudLinux's multi-layer security suite for Linux web servers: antivirus and malware cleanup, WAF, IDS/IPS, Proactive Defense, patch management (KernelCare/Patchman), and IP/domain reputation.
It runs on hundreds of thousands of shared, VPS and dedicated hosting servers, under cPanel, Plesk, DirectAdmin and standalone.
The engineering org is 60+ engineers in squads covering backend, core, server agent, malware research, WAF/WebShield, and Patchman.
Core services are Python; agents and performance-critical paths are Go and Rust.
We run on Hetzner and our own bare metal.
Check out our website for more information: Role Mission make sure the blameless post-mortem ships within 24 h and its actions get closed.
Drive the AI-augmented SDLC in practice: show what good agentic coding looks like (prompt specificity, context provision, review quality, tool boundaries) on real changes, not slides.
People multiplier (no direct reports) Mentor senior engineers and squad leads toward staff-level scope.
Act as the technical bar-raiser in hiring loops for senior and lead roles.
Be the engineering voice in product and sales discussions: estimates, feasibility, and no dated customer commitment without a written squad-lead estimate.




Key Milestones 30 days: Shipped at least one non-trivial change to production.
Can explain the full request path from agent to backend.
Has a personal list of top 10 technical risks.
90 days: Owns one cross-squad initiative with an approved ADR, a measured baseline, and a staged rollout plan.
Published risk register reviewed in arch sync.
6 months: That initiative is in production with before/after metrics.
At least one engineering standard (e.g. release gating, agent perf budget, design review template) is adopted by 3+ squads.
12 months: Recognized by squad leads as the default escalation point for cross-cutting technical decisions.
At least one senior engineer grown into broader scope with your mentorship.
Requirements Must have 10+ years building and operating production software, with 3+ years in a Staff/Principal/Tech Lead scope spanning several teams.
Strong production experience in Python and at least one of Go or Rust .
Deep Linux internals : processes, filesystems, networking, kernel interfaces (inotify/fanotify, eBPF or similar), packaging (RPM/DEB), systemd.
Track record of designing and running distributed systems at scale: async backends, queues, databases, caching, failure modes.
You have owned systems that run on customer machines (agents, daemons, on-prem software) and know what upgrade safety,



backward compatibility and resource budgets mean there.
Security mindset: threat modeling, secure coding, handling of untrusted input (files, traffic, user content).
Writes clear, short technical documents and drives decisions in async, remote teams across time zones.
Uses AI coding tools (Cursor, Claude, MCP-based tooling) daily and can judge their output critically.
Nice to have Experience in server security: AV/malware detection, WAF (ModSecurity/Coraza), IDS/IPS, rootkit detection, CVE/patch management.
Experience with WordPress and Node.JS web application hosting at scale ML in production for classification/detection, including evaluation and safe model rollout.
Observability at scale: Prometheus, Grafana, Sentry, ClickHouse or similar.
CI/CD ownership: GitLab CI, Jenkins, build systems for multi-distro packaging.
Open-source contributions in security or systems tooling.
Benefits What's in it for you?
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 versátil 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.
By applying for this position, you consent to the processing of your personal data as described in our Privacy Policy (), which pr

📌 Staff Engineer, Imunify360 (España)
🏢 CloudLinux
📍 España