Senior Offensive Security Researcher

Our teams are builders, problem-solvers, and innovators committed to shaping the future of security. If you are excited to solve hard problems alongside talented, mission-driven people, we invite you to help us build a safer future for humanity.

What Are We Looking For?

We’re looking for people who are relentlessly curious and committed to continuous learning. AI is reshaping every function across our business, and we enable every team member, regardless of role or level, to build fluency in AI tools and concepts. Those who thrive here actively seek out new solutions, experiment thoughtfully, and apply what they learn to drive better, faster, smarter outcomes.

As a Senior Offensive Security Researcher you will join a global team working across Windows, Linux and macOS, spanning Endpoint, Cloud and Identity - and push the boundaries of cybersecurity every day! You will research evasions against our own sensors, track the offensive tooling landscape and drive innovative research that anticipates the next generation of attacker tradecraft. By being part of our team, your work will impact protection of customer environments worldwide, incl. at 4 of Fortune10 and hundreds of Global2000, and you will have a chance to work on a industry-leading security product (recognized 6x in-a-row as Gartner Leaders, scoring highly in Mitre Att&ck, in Frost Radar, SE Labs and by others).

What will you do?

Primary responsibilities include:

• Proactively look for the newest and most sophisticated attack techniques, deeply research and understand their internals, and emulate these attacks to assess and improve our detection engines.
• Build tools to support detection assessments, create proofs-of-concept for the newest techniques and contribute to the design of innovative detection strategies.
• Work closely with our Threat-Intelligence team and engineering detection teams to provide guidance and highlight gaps in our detection and visibility capabilities.

What Skills and Knowledge Will You Bring?

Ideal candidates will have:

• 4+ years of experience in Red Teaming / Security Research / Offensive Research with a deep understanding of Windows internals.
• Hands-on experience with coding in Python and C/C++.
• Deep understanding of the malware world (how malware operates, infamous families, evasion and exploitation techniques).
• Experience in malware analysis (statically and dynamically) and reverse engineering (x86/x64)
• Understanding of existing EDRs internals.
• Experience writing detection signatures.
• Experience leveraging agentic AI workflows for malware analysis and detection engineering tasks (reverse engineering, code auditing, signature writing).
• Proven track record of conference speaking at security conferences or publications is an advantage

Why SentinelOne?

AI is redefining how the world operates and rewriting the rules of security in real time, and SentinelOne was built for this moment. From day one, we architected an AI-native platform designed to operate at machine speed, not as an add-on to legacy systems but as the foundation itself. If you want to build where innovation and impact move together, this is that place.

We invest in our Sentinels with comprehensive, competitive benefits designed to support you and your family:

Equity & Rewards

• Restricted Stock Units (RSUs)
• Employee Stock Purchase Plan (ESPP)
• Performance-based bonus

Time Off & Wellbeing

• Flexible time off, on top of the standard 5 weeks PTO
• Paid company wellness days and fully paid short-term sick/nursing leave
• Gender-neutral parental leave

Insurance & Financial Security

• Private medical care benefit
• Life and disability insurance
• Pension Insurance contribution
• Global business travel medical insurance
• Employee Assistance Program (EAP)

Work Perks & Flexibility

• Global home office allowance
• Meal allowance
• Hybrid work in Prague (Karlin), Brno (Clubco) or remote in CZ/SK. Only Prague-based employees are required to work from the office at least 2 days/week.

Wellness & Lifestyle

• Wellbeing allowance
• MultiSport benefit program
• Wellness Coach app

SentinelOne is proud to be an Equal Employment Opportunity and Affirmative Action employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.

SentinelOne participates in the E-Verify Program for all U.S. based roles.