At Mindbox we connect top IT talents with technology projects for leading enterprises across Europe.
We’re looking for a highly skilled backend engineer with both strong hands-on coding expertise and deep security knowledge to shape next-generation security solutions. You will design and build secure, scalable services using modern Java, Spring Boot, and cloud-native technologies, contributing to a Zero Trust platform for one of the world’s leading financial institutions.
This is more than just coding — you’ll drive industry best practices, mentor other engineers, and influence technology direction across a broad engineering community.
Sounds like your kind of challenge?
#LI- Hybrid – 6 days a month from the office in Kraków
What you’ll be doing
- 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.
What you get in return
- 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
Who we’re looking for
- 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)
- Demonstrated thought leadership via technical blogs, open-source contributions, or community engagement is a plus
Joining this project you’ll become part of Mindbox – a tech-driven company where consulting, engineering, and talent meet to build meaningful digital solutions. We’ll back you up every step of the way, accelerate your development, and ensure your skills make a difference.
Software Security Backend Engineer (Java)
Kraków
B2B
1200 - 1450 PLN/md +VAT
I will handle your recruitment
Karolina Cieślik
