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Senior Software Engineer in Test

SentinelOne
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Hybrid (CZ/SK (Prague Karlin, Brno Clubco))Full-timePosted 1mo ago

About the role

Senior Test Automation Engineer responsible for ensuring the quality, reliability, and performance of SentinelOne's SaaS products, leading validation efforts, defining test strategies, and developing automated tests for both Back-End and Front-End of the Singularity SaaS platform.

Responsibilities

  • Lead the design, development, and execution of comprehensive validation plans and test strategies for Console and SaaS services.
  • Collaborate with product management, development, and other stakeholders to understand requirements and translate them into effective test cases.
  • Design, develop, and maintain automated test frameworks in Python (Pytest) and/or TypeScript (Playwright) to enhance testing efficiency and coverage.
  • Integrate AI-powered tools and workflows into the validation lifecycle to automate test triaging, PR analysis, and reduce manual QA tasks.
  • Leverage Generative AI and LLMs to optimize test case generation, improve test coverage, and boost overall team productivity.
  • Utilize Docker for containerization to create consistent testing environments.
  • Manage and execute tests in cloud environments, including AWS and GCP.
  • Continuously enhance test strategies to improve coverage, efficiency, and effectiveness.
  • Perform various types of testing, including functional, regression and security testing.
  • Identify, document, and track software defects, working closely with development teams to ensure timely resolution.
  • Mentor junior engineers and contribute to the continuous improvement of our testing processes and methodologies.
  • Stay up-to-date with industry best practices and emerging technologies in validation and quality assurance.
  • Participate in code reviews and design discussions to ensure testability and quality from the early stages of development.

Qualifications

  • Bachelor's degree in Computer Science, Software Engineering, or a related field.
  • 3+ years of experience in software quality assurance or validation engineering, with a strong focus on SaaS products.
  • Proven experience in leading validation efforts and defining comprehensive test strategies.
  • Experience in developing and maintaining automated test frameworks in Python and/or TypeScript, Playwright (or similar, such as Java).
  • Hands-on experience integrating AI tools, LLMs, or AI-driven testing methodologies into daily QA workflows and CI/CD pipelines.
  • Familiarity with prompt engineering and utilizing AI assistants to streamline testing processes and automate repetitive tasks.
  • Strong understanding of SDLC and agile methodologies.
  • Proven experience with AWS or GCP, Docker, Kubernetes, plus event-driven architectures using Kafka or similar.
  • Familiarity with CI/CD tools such as Jenkins, GitHub, or GitLab.
  • Excellent analytical, problem-solving.
  • Ability to work independently and collaboratively in a fast-paced environment, with globally distributed teams.
  • Strong communication skills, both verbal and written.

Skills

Required:Test automation frameworksProgramming in PythonProgramming in TypeScriptCI/CD tooling

Benefits

  • Equity & Rewards: RSUs, ESPP, performance-based bonus
  • Time Off & Wellbeing: Flexible time off, 5 weeks PTO, wellness days, sick/nursing leave, parental leave
  • Insurance & Financial Security: Private medical care, life and disability insurance, pension contribution, travel medical insurance, EAP
  • Work Perks & Flexibility: Global home office allowance, meal allowance, hybrid work in Prague/Brno or remote in CZ/SK; Prague-based employees required to work onsite 2 days/week
  • Wellness & Lifestyle: Wellbeing allowance, MultiSport benefit program, Wellness Coach app
Last updated Oct 22, 2026. Interested? Apply on the company site.
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About SentinelOne

AI-Powered Enterprise Cybersecurity Platform

SentinelOne unifies AI-powered endpoint, cloud, identity, and data protection—enhanced by our Security Data Lake for seamless and efficient cybersecurity.

CybersecurityAI SecurityEndpoint SecurityCloud SecurityAI-SIEMIdentity SecurityEDRXDR
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