Sleek

Senior Engineer - OS Security R&D

Posted: Nov 14, 2025

Job Description

Sleek is unlike any other cybersecurity company.We work hand in hand with Israel's security institutions to deliver products that make a unique impact - things that simply cannot happen anywhere else.To tackle the most complex challenges, we employ the brightest minds in low- & high-level R&D, vulnerability research, AI/ML and full-stack development.If you're curious, intelligent and eager to make a strategic impact on Israel's national security, your place might be with us.About the JobIn this role you will be part of a high-performing R&D team, developing sophisticated endpoint solutions for various platforms.You will be spearheading the development of products end-to-end, while exploring innovative technological ideas and turning them into production-quality solutions - from early ideation through design, implementation, and deployment.This is a unique role, tackling complex problems involving OS internals and low-level system development. You’ll work closely with top-tier engineers, cross-functional partners and clients.Your knowledge, skills and qualities:5+ Years in the Cyber Security R&D fieldA team player with strong communication and problem-solving skillsExperience with C/C++, C# and PythonDeep understanding of OS Internals principlesStrong understanding of network protocolsReady to take the next step in your career? We’re waiting for you!

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