CloudLinux

Security Engineer

• Research cyberattacks affecting and targeting major business infrastructures;
• Participate in threat hunting and threat intelligence research projects;
• Analyze and mitigate the latest web vulnerabilities (both 0-day and patched), participate in communication with the responsible authority;
• Develop and improve internal tools for automatic threat analysis;
• Investigate incidents for the benefit of our customers.

Security Researcher/Analyst – Anti-malware Product

Engineer

• Lead email traffic launch and warm-up strategies for new services.
• Design and execute IP and domain warm-up plans, including ramp schedules, monitoring, and corrective actions.
• Own email reputation management, including proactive monitoring of RBLs, ISP feedback, and reputation signals.
• Define and monitor deliverability KPIs such as inbox placement, delivery rate, complaint rate, and bounce rate.
• Partner with platform engineers to translate deliverability requirements into controls and guardrails.
• Analyse traffic patterns to detect abuse, misconfiguration, or anomalous sending behaviour.
• Investigate and mitigate false positives, false negatives, and escalations related to email filtering.
• Document ISP-specific behaviors, geographic traffic characteristics, and known deliverability constraints.
• Support production incidents related to deliverability, reputation degradation, or traffic spikes.

Senior Email Deliverability Engineer

Backend Engineer

• Design and implement core platform components with an emphasis on reliability, scalability, and operational safety.
• Build and maintain cloud-native infrastructure, including networking, compute, and service orchestration.
• Own deployment workflows, warm-up processes, rollout strategies, and rollback mechanisms for production environments.
• Establish and maintain platform standards for monitoring, alerting, logging, and incident response.
• Develop and enforce guardrails to reduce operational risk from abuse, misconfiguration, or traffic anomalies.
• Define and track SLIs, SLOs, and KPIs related to uptime, latency, and platform health.
• Use AI-assisted engineering tools (Cursor, Claude Code, etc.) to improve development velocity and operational insight.
• Document architecture, operational procedures, and known failure scenarios.

Senior Python Developer

Account Executive

• **As our TuxCare Account Executive you will:**
• - Research, plan, and implement new target market initiatives
• - Create development plans, forecast sales targets, and growth projections
• - Move solid leads through the marketing funnel, and close business
• - Discover and build multiple Champions in multiple departments to ensure successful sales
• - Create cost justifications to meet each of department’s needs
• - Collaborate with the Director of Enterprise Sales to ensure the company's goals and targets are met
• - Identify market opportunities through meetings, networking and other channels
• - Meet existing and potential clients and building positive relationships
• - Attend events such as exhibitions and conferences
• - Prepare sales presentations and participate in sales meetings
• - Produce reports for management
• - Research prospective accounts in target markets

Enterprise Account Executive – South America

• Optimizing web performance - developing and implementing solutions to improve web server performance, request handling, and overall system efficiency, using benchmarking and measurements to validate improvements.
• Working with web servers - configuring, optimizing, and extending Nginx, Apache, and LiteSpeed.
• Optimizing PHP handlers and web request processing - analyzing and enhancing the performance of different PHP handlers and data transfer mechanisms for processing incoming web requests.
• Architecting web infrastructure - designing scalable, high-performance web systems and infrastructure solutions.
• Ensuring web security - implementing security measures to protect against web attacks and strengthen web server security in production environments.
• Database optimization - working with MySQL and MariaDB to optimize queries, improve performance, and ensure reliable database administration for web applications.
• Maintaining and enhancing LVE (Lightweight Virtual Environment) - working on resource limits, CPU throttling, memory limits, I/O limits, and other LVE-related features.
• Maintaining and enhancing MySQL Governor - working on database resource limitation and optimization.
• Maintaining and enhancing CageFS - working on file system isolation, user isolation mechanisms, and security boundaries.
• Developing new features for Limits - designing and implementing new resource limiting mechanisms and improvements to existing limit systems.
• Developing new features for Isolations - creating new isolation technologies and enhancing existing isolation mechanisms for better security and performance.
• Architecting system-level solutions - designing scalable, high-performance system-level solutions for resource management and isolation.
• Working with system internals - deep involvement with Linux system calls and system-level programming.
• Leading technical initiatives - making proposals that change solutions and technical direction across web optimization and CloudLinux core features.
• Optimizing system performance - improving performance through profiling, benchmarking, and algorithmic optimization across both web and system-level domains.
• Making data-driven decisions - using benchmarking, profiling, and measurements to validate technical approaches and prove all technical decisions with concrete data.
• Contributing to upstream solutions - actively participating in open-source projects and contributing improvements to public codebases, upstream codebases.
• Leveraging AI tools - using modern AI tools and techniques to enhance productivity, solve problems, and improve optimization solutions.
• Mentoring and coaching engineers, conducting technical reviews, and establishing engineering best practices.
• Collaborating with cross-functional teams to define technical strategy and roadmaps.
• Troubleshooting complex production issues across web performance, limits, isolations, and system-level functionality, implementing long-term solutions.

Security Researcher/Analyst – Anti-malware Product

Senior Email Deliverability Engineer

Senior Python Developer

Enterprise Account Executive – South America

Senior/Staff Python Engineer, CloudLinuxOS