Software Security Backend Engineer (Java)

Technologies we use

About the project

This is how we organize our work

This is how we work

Your responsibilities

• Design, build, and deploy secure backend services leveraging Java 21 (Virtual Threads/Project Loom) and Spring Boot 3.x
• Implement Zero Trust architecture principles and OAuth2/OpenID Connect at the code level
• Build solutions optimized for Google Kubernetes Engine (GKE) and databases such as Cloud Spanner or Cloud SQL (Postgres)
• Develop event-driven architectures using Pub/Sub or Kafka
• Automate from the outset: reduce manual toil and accelerate secure delivery pipelines
• Apply best practices for software security across SDLC
• Research new technologies, guide adoption, and set the technical direction for the platform
• Mentor engineers and foster a culture of technical excellence and knowledge sharing
• Actively contribute to engineering communities and “raise the bar” in delivering secure, high-quality solutions
• Stay ahead of industry trends and communicate changes effectively to influence adoption
• Note: Detailed project information will be shared during the recruitment process.

Our requirements

• Expert knowledge of Java 21+ (including JVM internals, memory management, Project Loom) and modern Spring ecosystem
• Solid experience with secure coding practices and building authentication/authorization flows using OAuth2/OpenID Connect
• Proven experience with Google Cloud Platform components (particularly GKE, Cloud Spanner, Cloud SQL)
• Strong practical experience in event-driven architecture with Kafka or Pub/Sub
• Demonstrated ability to think strategically about risk, security, and future technology adoption
• Influential leadership skills: capable of transferring expertise and guiding teams across the organization
• Hands-on problem-solving mindset, adaptable across multiple domains (not just a network or back-end specialist, but a generalist who thrives on complex challenges)

Optional

• Demonstrated thought leadership via technical blogs, open-source contributions, or community engagement

What we offer

• Flexible cooperation model – choose the form that suits you best
• (B2B, employment contract, etc.)
• Hybrid work setup – 6 days a month from the office in Kraków
• Collaborative team culture – work alongside experienced professionals eager to share knowledge
• Continuous development – access to training platforms and growth opportunities
• Comprehensive benefits – including Interpolska Health Care, Multisport card, Warta Insurance, and more
• High quality equipment – laptop and essential software provided

Benefits