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.
This is how we organize our work
This is how we work
at the client's site
agile
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
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
sharing the costs of sports activities
private medical care
sharing the costs of professional training & courses
life insurance
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.
Mindbox Sp. z o.o.
At Mindbox, we connect top IT talents with technology projects for leading enterprises across Europe.
Our focus is on matching your skills with work that matters – projects that use modern tech stacks, solve real business challenges, and give you space to grow. By joining us, you’ll deliver technology solutions for well-known brands, supported by the Mindbox team that values knowledge-sharing and continuous development. We make sure you have the tools, flexibility, and guidance to do your best work – and to keep moving forward in your career.
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