Senior Software Engineer in Test

Our Purpose At SentinelOne, we are driven by a clear purpose: to give the advantage to those who secure our future. As AI reshapes how organizations build, operate, and innovate, the responsibility to protect them becomes more critical than ever. When you join SentinelOne, your work helps protect global enterprises, critical infrastructure, and the technologies shaping tomorrow. If you are motivated by meaningful challenges and want your impact to be real, measurable, and global, you will find purpose here. About Us SentinelOne is a company at the intersection of AI and security, pioneering a new operating model for cybersecurity. Our AI-native platform unifies protection across endpoint, cloud, identity, data, and AI systems to deliver autonomous detection and response with clarity and speed. By combining real-time analytics, intelligent automation, and a unified data foundation, we reduce noise, simplify complexity, and empower security teams to focus on what truly matters. 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 Software Engineer in Test, you will be tasked with ensuring the quality, reliability, and performance of SentinelOne's backend test frameworks and tools as part of the Test Platform Services team, leading standard development, defining test strategies, building tools, and working closely with backend development and quality teams to deliver exceptional user experiences. You will take responsibility for the design, implementation, and maintenance of the backend test frameworks and tooling responsible for high quality delivery of SentinelOne SaaS services. What Will You Do? Primary responsibilities include: Lead the design, development, and improvements of standards, test frameworks, and tools used in validation of backend SaaS services. Collaborate with development, quality and other stakeholders to understand requirements and translate them into effective tooling. Design, develop, and maintain automated test frameworks in Python (Pytest) and TypeScript (Playwright) to enhance testing efficiency and coverage, working closely with the development and validation teams. Integrate AI powered tools and workflows into the software development lifecycle, leveraging Generative AI and LLMs to automate quality processes and boost developer and validation productivity. Utilize Docker for containerization and manage test platform services in cloud environments. Continuously enhance test strategies to improve coverage, efficiency, and effectiveness of backend test harnesses and infrastructure. Mentor junior engineers and contribute to the continuous improvement of testing standards, processes and methodologies. Stay up to date with industry best practices and emerging technologies in AI, tooling and quality assurance. Work hands-on with development and validation teams to push consistency across codebases and shepherd adoption of tooling. What Skills and Knowledge Will You Bring? Ideal candidates will have: A bachelor's degree in Computer Science, Software Engineering, or a related field, with 5 or more years of experience in tooling development, software quality assurance or validation engineering, with a strong focus on SaaS products. Proven experience in leading test frameworks and defining comprehensive test strategies. Experience developing and maintaining automated test frameworks in Python, using Playwright, TypeScript, or similar tools in other programming languages such as Java. Hands-on experience integrating AI tools, LLMs, or AI-driven testing methodologies into daily QA workflows and CI/CD pipelines, including familiarity with prompt engineering and using AI assistants to streamline testing processes and automate repetitive tasks. Strong understanding of software development lifecycle (SDLC) and agile methodologies. Proven experience with AWS or GCP, and with Docker, Kubernetes, plus event-driven architectures using Kafka or similar tools; familiarity with CI/CD tools such as Jenkins, GitHub, or GitLab. Excellent analytical and problem-solving skills. Ability to work independently and collaboratively in a fast-paced environment with globally distributed teams, with a strong technical background in software automation development and a big-picture, can-do approach. 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.