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Senior Software Engineer (Java) - EventDB, Scalable Columnar Database

SentinelOne

SentinelOne

Administration, Software Engineering
Slovakia
EUR 5k-5k / month + Equity
Posted on Jul 10, 2025

About Us

At SentinelOne, we’re redefining cybersecurity by pushing the limits of what’s possible—leveraging AI-powered, data-driven innovation to stay ahead of tomorrow’s threats.

From building industry-leading products to cultivating an exceptional company culture, our core values guide everything we do. We’re looking for passionate individuals who thrive in collaborative environments and are eager to drive impact. If you’re excited about solving complex challenges in bold, innovative ways, we’d love to connect with you.

What are we looking for?

We're excited to expand our new team with passionate and skilled backend engineers, who are interested in solving non-trivial scale and data problems with a unique blending of cloud, cybersecurity, distributed systems, and software optimisation techniques and services. On our team you will be key to improving the day-to-day experience of threat investigators & cyber analysts around the world by giving them new "Security Graph" ways to view, interpret, and take action on security data.

As a Senior Engineer, you will be responsible for building these new features of our AI SIEM product, that underpins the core value we bring to our customers - who want to be protected and understand the signal we extract from the noise for them - from the ~3 trillion events & several Petabytes of ingested data, processed every day by our Security Data Lake. You will interact with engineers in and across the org, tech leads, architects, product management, sales, and marketing.

Because our team’s work is closely tied to the user’s experience of our platform, your work will have an outsized impact on the company and on future customer-facing features & how customers leverage our platform in order to protect their business. If you thrive in an environment where collaboration, creativity, and technical excellence are valued, we're looking for you!

You will be joining one of the fastest growing publicly-traded SaaS companies, with a mission of ‘Empowering the World to Run Securely’. Together through our SW, we will serve hundreds of thousands of users from security teams at enterprise & government customers across the globe (incl. 4 of Fortune 10 and hundreds of Global 2000), and protect tens of millions of endpoints, clouds & identities.

Your tools: Java (new codebase 6-12 months); Go; Kubernetes, Docker, AWS/GCP cloud & related data services (e.g. S3/GCS, SQS/PubSub, PostgreSQL/RDS/CloudSQL); Cassandra; DataSet.com, Kafka, Redis; GitHub

What will you do? A day in the life:

  • Software Development (70-80% of your time; primarily Java)
    Dive deep into coding, turning innovative specs into reality. Write robust tests, tackle bugs with finesse, and ensure top-notch security in your code.
  • Leadership and Collaboration
    Lead technical initiatives and collaborate with cross-functional teams.
  • Code Review
    Champion code quality, security, and efficiency. Your keen eye for detail will guide you in reviewing and elevating our codebase.
  • Generate Technical Specifications
    Drive architectural decisions and provide technical guidance in the development of solutions. Articulate the rationale behind your technical choices and document key implementation details. Engage in thoughtful discussions, providing and receiving insightful feedback on specifications.
  • Support and On-Call Rotation
    Be a problem-solver. Respond to and troubleshoot outage incidents, and address security issues promptly.
  • Team Collaboration
    Be a team player. Assist your colleagues, share constructive feedback, and contribute to our weekly syncs and daily Slack standups.

What Do You Bring to the Table?

We do not require a perfect match with everything below; however, the more this describes you, the better of a fit you will be for this role!

  • Experience
    • Solid computer science/software engineering/similar background with multiple years of practical engineering experience.
    • Proven expertise in designing and operating distributed systems.
  • Technical Mastery
    • Strong proficiency in Java (multiple years of handson experience).
    • You value elegant code that is concise and readable.
    • Have you used tools like Jenkins, Helm, Docker? Do you have infrastructure experience with AWS, GCP, K8s, etc? Experience with Go? Great, that helps!
  • A Collaborative, Curious, and Practical Mindset
  • If this sounds like you, we should talk:
    • You are excited about opportunities to serve as a mentor and to play a pivotal role in fostering both technical excellence and team unity.
    • Your passion for understanding and solving complex engineering challenges is matched by your pragmatic approach to problem-solving.
    • You're comfortable weighing in on CAP theorem considerations, and are energized by selecting the data structure with the perfect trade-offs for a problem at hand.
    • You believe that honing ideas and technical designs with other engineers is crucial for achieving an optimal solution.
    • You value asking good questions, because you believe “a problem well-stated is half-solved.”

Why Us?

Join a cutting-edge company where you'll take on extraordinary challenges alongside top industry talent. Enjoy flexible working hours and the option to work remotely from anywhere in Slovakia. We offer access to major co-working spaces for those who prefer an office environment. In Czechia, you can also work from our modern offices in Prague or Brno.

Salary starting from 5000 EUR/month
Annual bonus based on company performance, paid in two instalments
The final base salary may be adjusted based on the individual skills and experience of the selected candidate.

Competitive Benefits Package:

  • Stock & Bonuses: Grant of Restricted Stock Units with a 4-year vesting plan, annual performance-based bonuses, and an employee stock purchase plan.
  • Time Off & Well-being: Flexible Time Off, on top of the standard 5 weeks vacation, flexible paid sick days, fully paid Short Term Sick/Nursing Leave, 16-week parental leave, grandparent leave, and additional company holidays.
  • Insurance & Wellbeing: Pension Insurance Contribution, Premium life insurance, and a Global Employee Assistance Program.
  • Work Perks: Monthly meal and well-being allowance, high-end MacBook/Windows laptop, work-from-home support, and in-office refreshments.
  • Growth & Community: LinkedIn Learning, internal mentoring, educational support, generous referral bonuses, and optional company events (sports, BBQs, charity).

Be part of an inclusive, innovative workplace that values belonging, flexibility, and growth!

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.