Senior Systems Engineer – Security Team

This is a fully remote position, open to applicants in Poland.

📋 Description

• Design, implement, and manage the infrastructure for the security team.

• Ensure the security platforms are highly available and reliable through proactive monitoring, alerting, and capacity planning.

• Oversee and enhance cloud infrastructure across dedicated servers and various cloud providers.

• Automate routine operational processes such as provisioning, configuration management, patching, and secret rotation.

• Act as the primary technical owner for troubleshooting and resolving infrastructure incidents.

• Maintain comprehensive infrastructure documentation, including architecture diagrams, runbooks, and change logs.

• Collaborate with security engineers to ensure that the foundational platforms align with tooling and integration needs.

⛳️ Requirements

• 5+ years of practical experience in Linux system administration within production environments.

• In-depth knowledge of Linux internals, including systems, networking stack, storage, and performance tuning.

• Strong grasp of networking principles such as TCP/IP, DNS, TLS, routing, and firewalling (iptables / nftables).

• Experience with bare-metal and dedicated server environments, such as Hetzner or similar providers.

• Hands-on experience with deploying, operating, and securing Kubernetes clusters in production, including cluster lifecycle management, CNI networking (Cilium preferred), storage, and RBAC.

• Experience in deploying, configuring, and managing ClickHouse and PostgreSQL in a production setting.

• Practical experience operating and maintaining Keycloak in production, including high availability setup, backend management, and realm/client configuration.

• Understanding of identity protocols like OIDC, SAML 2.0, and OAuth 2.0.

• Practical experience managing infrastructure across cloud platforms and dedicated servers, covering compute, networking, storage, and cost optimization.

• Proficiency in Infrastructure as Code tools such as Terraform, SaltStack, and Ansible.

• Strong scripting capabilities in Python and/or Go for automation and operational tools.

• Experience in building and maintaining monitoring solutions, including Prometheus, Grafana, and Alertmanager.

• Familiarity with log management and aggregation tools like Vector, Loki, or ELK.

• Excellent written and verbal communication skills with clarity and structure.

• Upper-Intermediate (B2) English proficiency or higher.

🏝️ Benefits

• Full-time remote work opportunities with flexible working hours.

• Private health insurance.

• Additional day off for each calendar year.

• Compensation for sports programs.

• Comprehensive mental health support program.

• Free online English classes with a native speaker.

• Generous employee referral program.

• Opportunities for training, participation in internal workshops, and attendance at international professional conferences and corporate events.