CloudLinux

• Ensure the timely update of existing kernels with security fixes and CVEs patches • Provide support for existing functionality and implement new features • Optionally assist with automation by creating Python and Bash scripts (e.g., for testing CVE patches), while the main responsibility for automation lies with a dedicated team

Role Description We are seeking experienced Kernel Developers to join our talented team at KernelCare. If you are passionate about Linux and enjoy the challenge of developing Linux Kernels and patches, then this is the perfect opportunity for you. As a Kernel Developer, you will utilize your strong C development skills and passion for Linux to create patches with a strong focus on cybersecurity. This role offers a rewarding and stimulating career where you can find solutions for our valued customers. - Ensure the timely update of existing kernels with security fixes and CVEs patches - Provide support for existing functionality and implement new features - Optionally assist with automation by creating Python and Bash scripts (e.g., for testing CVE patches), while the main responsibility for automation lies with a dedicated team Qualifications - Strong proficiency in C programming and exceptional debugging skills - Experience with Linux kernel core subsystems - Extensive experience with GDB and other debuggers - Basic understanding of kernel ABI - Proficiency in Git for development, patch management, and branch management - Exceptional problem-solving and strategic thinking skills - Strong planning, time management, decision-making, presentation, and organizational abilities - Experience automating routing tasks with AI tools - Experience with Python and shell scripting - Ability to thrive in an agile, fast-paced environment - English - upper-intermediate or higher - to ensure clear communication of progress within the team Requirements - Expertise in CPU performance and power analysis (nice to have) - In-depth knowledge of CPU and cache architectures (nice to have) - Basic understanding of x86-64 Assembly (AT&T asm) (nice to have) - Prior exposure to Jenkins (nice to have) Benefits - A focus on professional development - Interesting and challenging projects - Fully remote work with flexible working hours, allowing you to schedule your day and work from any location worldwide - Paid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leaves - Compensation for private medical insurance - Co-working and gym/sports reimbursement - Budget for education - The opportunity to receive a reward for the most innovative idea that the company can patent

• Lead and develop four teams (Java, JavaScript/Go, Python, PHP) totalling ~18 engineers • Build a culture of technical excellence, accountability, and continuous improvement • Define hiring plans, conduct performance reviews, and drive career development for your reports • Manage onboarding and ramp-up of new team members, projects, and libraries into the team's scope • Set and enforce standards for CVE analysis, vulnerability assessment, patch backporting, and security release processes across all language ecosystems • Drive consistency in tooling and workflows across teams (CI/CD pipelines, patch delivery, release processes) • Evaluate and guide AI-assisted automation for backporting and vulnerability discovery • Serve as the final technical escalation point for complex or cross-team security issues • Own SLA compliance across all language platforms • Align team efforts with client expectations and delivery commitments • Organise and continuously improve development workflows and engineering processes • Coordinate internal documentation and ensure it reflects the actual state of each project • Ensure smooth coordination between language teams and OS, Docker, and platform teams • Manage scope boundaries and overlap with OS and platform teams, particularly around shared dependencies and cross-ecosystem vulnerabilities

Role Description We are looking for an experienced Engineering Manager to take ownership of TuxCare's Language Security Research function — a group of four teams responsible for delivering security patches for end-of-life and non-EOL open-source language runtimes and frameworks. This is a manager-focused role within a technical delivery environment, where broad language ecosystem expertise and strong engineering leadership are both essential. You will manage four teams (~18 engineers) across Java, JavaScript/Go, Python, and PHP disciplines, setting the technical direction and operational standards for the entire function. What You Will Own - People & Teams - Lead and develop four teams (Java, JavaScript/Go, Python, PHP) totaling ~18 engineers - Build a culture of technical excellence, accountability, and continuous improvement - Define hiring plans, conduct performance reviews, and drive career development for your reports - Manage onboarding and ramp-up of new team members, projects, and libraries into the team's scope - Technical Direction - Set and enforce standards for CVE analysis, vulnerability assessment, patch backporting, and security release processes across all language ecosystems - Drive consistency in tooling and workflows across teams (CI/CD pipelines, patch delivery, release processes) - Evaluate and guide AI-assisted automation for backporting and vulnerability discovery - Serve as the final technical escalation point for complex or cross-team security issues - Delivery & Operations - Own SLA compliance across all language platforms - Align team efforts with client expectations and delivery commitments - Organise and continuously improve development workflows and engineering processes - Coordinate internal documentation and ensure it reflects the actual state of each project - Ensure smooth coordination between language teams and OS, Docker, and platform teams - Manage scope boundaries and overlap with OS and platform teams, particularly around shared dependencies and cross-ecosystem vulnerabilities Qualifications - Strong background in software development across multiple language ecosystems — at least 6 years of hands-on experience - 3+ years of engineering leadership experience (Team Lead or Engineering Manager) in a product company - Proven experience with technical delivery and accountability for team outcomes - Solid working knowledge of at least 3 of the 5 languages your teams cover: Java, JavaScript, Go, Python, PHP - Hands-on experience with security research or vulnerability analysis: CVE triage, patch backporting, or similar - Ability to work effectively in distributed teams and within larger organisational structures - Strong communication skills — capable of interfacing with stakeholders and meeting external delivery expectations - Experience building or improving engineering processes from scratch - Experience with CI/CD systems (GitLab CI, Jenkins) and dependency management tooling (Maven/Gradle, npm, pip, Go modules) - Upper-intermediate or higher English (written and spoken) Nice to have - Hands-on experience identifying and analysing vulnerabilities in language-ecosystem applications - Understanding of the security vulnerability lifecycle (CVE, CVSS, CWE, CSAF/VEX) - Background in open-source security, supply chain security, or ELS-type products - Experience integrating AI tooling into research or patching workflows - Knowledge of Docker, Kubernetes, or cloud-native ecosystems Benefits - A strong focus on professional development with opportunities for learning and growth - Interesting and challenging projects - Mentor and other knowledge-exchange programs - Fully remote work with flexible working hours, allowing you to schedule your day and work from any location worldwide - Paid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leaves to ensure you maintain a healthy work-life balance - Compensation for private medical insurance - Co-working and gym/sports reimbursement - The opportunity to receive a reward for the most innovative idea that the company can patent, fostering a culture of creativity and innovation

• Gather requirements from multiple stakeholders on a project • Lead architectural design and technical direction for high-impact initiatives • Guide multiple engineering teams in the adoption of scalable, maintainable solutions • Collaborate across teams to gather requirements and align on priorities • Promote engineering excellence through design reviews, mentorship, and best practices • Continuously explore and evaluate new technologies, methodologies, and tools • Ensure that all solutions are robust, secure, and performant in production environments • Champion a culture of automation, reliability, and continuous improvement • Research & Strategy: Analyze how 5+ languages handle packages and design a universal data model to store them efficiently. • Algorithm Design: Create logic to automatically resolve complex dependency trees at scale. • Consensus: Work with multiple teams to implement this standard across the company.

Role Description To drive the further development of Endless Lifecycle Support (ELS) and other cross-cutting systems, we are seeking a hands-on Staff Engineer who can combine deep technical execution with product ownership. This role is ideal for someone who operates as a Senior Developer (70%) and a Technical Product Owner (30%). The engineer will work closely with stakeholders to understand their needs, translate them into proof-of-concepts, and evolve those into robust, production-grade solutions. The role requires strategic thinking, strong stakeholder engagement, and the ability to actively shape the product vision and roadmap. - Gather requirements from multiple stakeholders on a project - Lead architectural design and technical direction for high-impact initiatives - Guide multiple engineering teams in the adoption of scalable, maintainable solutions - Collaborate across teams to gather requirements and align on priorities - Promote engineering excellence through design reviews, mentorship, and best practices - Continuously explore and evaluate new technologies, methodologies, and tools - Ensure that all solutions are robust, secure, and performant in production environments - Champion a culture of automation, reliability, and continuous improvement Real-world Challenge: Building a Unified Dependency Graph - One of our core goals is to map the software supply chain for thousands of applications. You will lead the design of a system that ingests projects and calculates their full dependency trees. The Complexity: - Variable Definitions: "Dependency" means something different in every language. We have to handle static vs. dynamic linking, compile-time vs. runtime scopes, and version ranges (e.g., ^1.2.0). - Context Awareness: The system must understand that dependencies often change based on the environment (e.g., specific libraries for GPU support or Windows). - Tool Variance: The system must mimic the logic of various package managers (Pip, Poetry, Maven, Gradle) to ensure accuracy. The Staff Engineer's Mission: - Research & Strategy: Analyze how 5+ languages handle packages and design a universal data model to store them efficiently. - Algorithm Design: Create logic to automatically resolve complex dependency trees at scale. - Consensus: Work with multiple teams to implement this standard across the company. Qualifications - Proficiency in Python is a must. - Knowledge of any other programming languages is a plus. - Requires a senior-level engineer proficient in designing, implementing, and maintaining scalable software systems. - Experience in technical product management or direct ownership of product roadmaps is highly valued. - Ability to align different viewpoints, prioritize effectively, and turn feedback into actionable plans. Requirements - Hands-on Engineering Leadership: Regular code contributions and leading by example in both architecture and implementation are expected. - Technical Product Ownership: Involves shaping product direction — gathering and refining requirements, translating them into technical goals, and aligning them with broader engineering strategies. - Full Lifecycle Responsibility: Ownership of the entire lifecycle of major components, from initial concept through prototyping, delivery, and ongoing evolution. - Cross-Functional Collaboration: Active communication with engineering teams, product managers, and stakeholders across departments. - Strategic Thinking + Execution: Understanding broader product and organizational goals, and making informed engineering trade-offs within that context. Benefits - A focus on professional development. - Interesting and challenging projects. - Fully remote work with flexible working hours, allowing you to schedule your day and work from any location worldwide. - Paid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leaves. - Compensation for private medical insurance. - Co-working and gym/sports reimbursement. - Budget for education. - The opportunity to receive a reward for the most innovative idea that the company can patent.

• Own production PostgreSQL reliability: HA design, Patroni, PgBouncer, replication, failover, upgrades, vacuum/bloat control, query tuning, locks, indexes, capacity, backups, PITR, and restore validation. • Improve disaster recovery and operational evidence: tested restores, documented recovery paths, measurable RTO/RPO targets, runbooks, and safe maintenance plans. • Support the wider database estate: ClickHouse, MongoDB, and Redis. You will troubleshoot incidents, review access and data-safety changes, improve monitoring, and learn the production ClickHouse patterns already in use. • Automate DBA workflows with Ansible, Terraform/OpenTofu, GitLab CI/CD, scripts, and reproducible runbooks for provisioning, grants, backups, restores, health checks, and ownership metadata. • Help build DBaaS-style self-service capabilities so engineering teams can request databases, access, credentials, and operational checks with less manual DBA intervention. • Improve observability and incident response through Grafana, metrics, logs, SLOs, alert rules, Opsgenie routing, and clear communication during production issues.

Role Description We are hiring a Senior Database Reliability Engineer to join the Infrastructure DBA cell. This is a hands-on production ownership role, not a narrow ticket-processing DBA position. You will keep critical database services reliable, automate repeated work, support engineering teams, and reduce single-person dependency in our PostgreSQL, ClickHouse, MongoDB, and Redis operations. PostgreSQL is the main requirement. ClickHouse experience is a strong plus, but it is not a day-one blocker. We need a senior engineer with enough database, Linux, automation, and incident-response depth to learn our ClickHouse environment quickly and operate it safely. Your Responsibilities - Own production PostgreSQL reliability: HA design, Patroni, PgBouncer, replication, failover, upgrades, vacuum/bloat control, query tuning, locks, indexes, capacity, backups, PITR, and restore validation. - Improve disaster recovery and operational evidence: tested restores, documented recovery paths, measurable RTO/RPO targets, runbooks, and safe maintenance plans. - Support the wider database estate: ClickHouse, MongoDB, and Redis. Troubleshoot incidents, review access and data-safety changes, improve monitoring, and learn the production ClickHouse patterns already in use. - Automate DBA workflows with Ansible, Terraform/OpenTofu, GitLab CI/CD, scripts, and reproducible runbooks for provisioning, grants, backups, restores, health checks, and ownership metadata. - Help build DBaaS-style self-service capabilities so engineering teams can request databases, access, credentials, and operational checks with less manual DBA intervention. - Improve observability and incident response through Grafana, metrics, logs, SLOs, alert rules, Opsgenie routing, and clear communication during production issues. What Success Looks Like - PostgreSQL clusters have tested backup and restore paths, useful dashboards, clear ownership, and documented failover procedures. - Repeated DBA tickets become automation or self-service workflows. - ClickHouse operational knowledge is no longer a single-person dependency. - Database incidents have owners, runbooks, evidence, and measurable recovery paths. - Product and engineering teams get database help faster without sacrificing safety, auditability, or reliability. What We Expect From You - Deep hands-on PostgreSQL experience in business-critical production environments, typically 5+ years or equivalent depth. - Strong understanding of PostgreSQL internals and operations: MVCC, WAL, transactions, locks, indexes, query planning, replication, autovacuum, bloat, major upgrades, backups, PITR, and restore testing. - Proven experience with highly available databases and the ability to reason about quorum, split-brain risk, failover, rollback, and recovery. - Strong Linux and infrastructure fundamentals: systemd, networking, storage, filesystems, CPU/memory/disk bottlenecks, TLS, DNS, firewalls, and root-cause troubleshooting. - Automation skills with Ansible and scripting. Terraform/OpenTofu, GitLab CI/CD, and merge-request based delivery are strong advantages. - Ability to support more than one database engine. Ready to learn ClickHouse quickly and take responsibility for it. - Practical use of AI engineering assistants such as Claude and Codex to improve speed and quality, while personally verifying generated SQL, commands, scripts, and operational conclusions. - Clear written English for asynchronous work in Jira, Slack, GitLab, Slite, and runbooks. Nice to Have - ClickHouse operations: replication, Keeper/ZooKeeper, MergeTree engines, distributed DDL, grants, row policies, backups, query troubleshooting, and cluster recovery. - MongoDB replica sets and Percona Backup for MongoDB. - Redis/Sentinel and broker/cache failure modes. - Database observability, SLOs, golden signals, alert tuning, and executable incident runbooks. - Building internal platforms, self-service portals, or DBaaS workflows for engineering teams. Benefits - A focus on professional development. - Interesting and challenging projects. - Fully remote work with flexible working hours, allowing you to schedule your day and work from any location worldwide. - Paid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leaves. - Compensation for private medical insurance. - Co-working and gym/sports reimbursement. - Budget for education. - The opportunity to receive a reward for the most innovative idea that the company can patent.

- Absolute Domain Ownership: Take responsibility for a specific part of the platform or product. You will shape the technical direction, write and review production code, maintain CI/CD pipelines, prepare releases, and make sure your area is stable in production. - Rapid Prototyping: Turn ideas, experiments, or unclear requirements into working solutions. Use AI tools where they help speed up routine work, such as drafting technical specs, creating tests, refactoring, or planning implementation. - Smart Scaling: Identify technical bottlenecks in your area and lead the changes needed to fix them. This may include architecture improvements, infrastructure changes, cloud-related work, or better observability. - Daily orchestration: Use tools like Claude Code, or similar assistants as part of your development process. This may include debugging, writing tests, refactoring legacy code, improving documentation, or exploring unfamiliar parts of the codebase. - Validation & integrity: You act as the "Interception Layer." You validate AI outputs to ensure your domain doesn't drift into "Dark Architecture" or "AI Slop." - Connect product needs with engineering execution: Work with stakeholders to understand business needs and turn them into clear technical plans. Help prioritize work based on impact, risk, and technical complexity, and push back on work that does not bring enough value. - Keep ownership clear and execution focused: Stay close to how your work behaves in production. Help with incidents, improve monitoring and observability, and reduce unnecessary process overhead where possible.

Role Description CloudLinux is hiring Product Engineers across different product areas and technical domains. Depending on your background and strengths, you may contribute to one of our core products, platform components, security solutions, automation systems, or new AI-first initiatives. The Mission: CloudLinux is moving away from fragmented, over-aligned development. We are looking for a Product Engineer to take absolute, end-to-end ownership of a specific product domain, platform component, or business-critical technical area. In this role, you are not just a senior coder; you are the technical and operational driver of your domain. You will build, own the roadmap, and orchestrate delivery using an AI-first approach to help CloudLinux scale smart — not through “money rain,” but through elite, lean efficiency. What You’ll Do: - End-to-End Domain Orchestration - Absolute Domain Ownership: Take responsibility for a specific part of the platform or product. You will shape the technical direction, write and review production code, maintain CI/CD pipelines, prepare releases, and make sure your area is stable in production. - Rapid Prototyping: Turn ideas, experiments, or unclear requirements into working solutions. Use AI tools where they help speed up routine work, such as drafting technical specs, creating tests, refactoring, or planning implementation. - Smart Scaling: Identify technical bottlenecks in your area and lead the changes needed to fix them. This may include architecture improvements, infrastructure changes, cloud-related work, or better observability. - AI-Agentic Development - Daily orchestration: Use tools like Claude Code, or similar assistants as part of your development process. This may include debugging, writing tests, refactoring legacy code, improving documentation, or exploring unfamiliar parts of the codebase. - Validation & integrity: You act as the "Interception Layer." You validate AI outputs to ensure your domain doesn't drift into "Dark Architecture" or "AI Slop." - Product & Operational Leadership - Connect product needs with engineering execution: Work with stakeholders to understand business needs and turn them into clear technical plans. Help prioritize work based on impact, risk, and technical complexity, and push back on work that does not bring enough value. - Keep ownership clear and execution focused: Stay close to how your work behaves in production. Help with incidents, improve monitoring and observability, and reduce unnecessary process overhead where possible. Qualifications - 8+ years of hands-on software engineering experience: Strong engineering fundamentals and ability to apply them across different languages, frameworks, and environments. - Advanced AI usage: Regular use of LLM-based tools for development, debugging, testing, refactoring, or code review. Not just occasional experimentation. - Linux and CI/CD experience: Strong Linux fundamentals and experience building, maintaining, and troubleshooting CI/CD pipelines or runners. - Product-mindset: Ability to turn unclear requirements into a clear technical plan, make trade-offs, and prioritize based on impact. - Ownership: Experience shipping projects in high-accountability environments, where you were directly responsible for the result. - Clear communication: Professional English, clear status updates, and ability to explain technical trade-offs to different stakeholders. Benefits - A focus on professional development. - Interesting and challenging projects. - Fully remote work with flexible working hours, that allows you to schedule your day and work from any location worldwide. - Paid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leaves. - Compensation for private medical insurance. - Co-working and gym/sports reimbursement. - Budget for education. - The opportunity to receive a reward for the most innovative idea that the company can patent.