This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Engineer, KernelCare based in Estonia. This is a high-impact individual contributor role focused on building the next generation of automation and high-reliability systems for Linux security products. You will combine deep backend engineering expertise with technical product ownership across critical product components. The role is approximately 70% hands-on engineering and 30% technical product ownership, giving you significant influence over both technology and delivery. You will work across the full lifecycle, from discovery and architecture through implementation, production release, and ongoing optimization. AI-assisted development is an integral part of the engineering workflow, with a strong focus on improving automation and operational throughput. The ideal candidate is an autonomous technical leader who thrives on ambiguity, complex systems, and meaningful cybersecurity challenges.