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You will work closely with IT, Infrastructure, Cyber Defense, and data security colleagues to make protection reliable and effective without creating unnecessary friction for users or critical systems.\nResponsibilities\nDeploy and maintain EDR/XDR agents and endpoint protection policies across Windows, Linux, and macOS workstations and production servers, managing the full agent lifecycle: upgrades, policy tuning, exclusions, and controlled rollback\nResolve agent failures, telemetry gaps, policy conflicts, and performance issues. Coordinate deployments with IT, which provides first-line support, and take ownership of complex security cases\nImplement risk-based OS hardening baselines together with application and infrastructure owners: test compatibility, prepare rollback steps, and deploy changes safely across production systems\nOperate endpoint DLP controls: maintain agents, implement policies agreed with data security colleagues, and reduce unnecessary blocking without weakening protection\nMaintain assigned security platforms (e.g. SIEM), including service health, access configuration, updates, storage, backups, and recovery\nMonitor telemetry and control health, investigating stale agents, coverage gaps, and unmanaged systems, and drive fixes through automation and improved runbooks\nSupport Cyber Defense investigations with endpoint expertise and execute approved containment actions, escalating anything that could disrupt production\nAutomate recurring administration, validation, and reporting tasks using scripts and APIs, and maintain clear documentation for configurations and procedures\nRequirements\n4+ years of hands-on experience in endpoint security, infrastructure security, system security, or a related security engineering role\nPractical experience deploying and operating an enterprise EDR/XDR or endpoint protection platform across a mixed workstation and server environment\nStrong Linux administration skills, plus the ability to support and troubleshoot protection on Windows workstations and servers using logs, services, permissions, network connections, and resource usage\nExperience introducing security controls into production, including testing, controlled deployment, and rollback\nExperience implementing OS hardening and working with native security controls\nUnderstanding of access-control models, least privilege, endpoint telemetry, file-integrity monitoring, and host-isolation techniques\nAbility to automate operational work using at least one scripting language such as Python, Bash, or PowerShell\nClear communication with technical colleagues and system owners, reliable documentation, and the ability to follow issues through to a verified result\nUpper-Intermediate English\nFluent Ukrainian\nWill be a plus\nExperience administering a self-managed Elastic or another SIEM platform\nExperience with endpoint DLP solutions or Microsoft Defender\nmacOS security and device-management tools such as Mosyle, ManageEngine, Ansible, or Puppet\nExperience with CIS Benchmarks, DISA STIG, or native OS security controls (SELinux, AppArmor, FileVault, BitLocker, etc.)\nExperience supporting a large, distributed fleet of endpoints or servers, ideally in fintech, trading, or another performance-critical environment\nTechnical education in Information Security, Computer Science, or a related field\nWe offer\n15 paid vacation days per year\n10 paid sick leave days per year\nPublic holidays according to the company’s approved holiday calendar\nMedical 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