Senior Full Stack Engineer w Kraków, Polska

Expected, Java, Spring, https://jobeax.com/link/6WcBICn0LM558SP0, TypeScript, Swagger, OpenAPI, JUnit, Mockito, Jira, Confluence

Optional, BPMN

Operating system, Windows

About the project, We are seeking an experienced Technical Lead with a primary focus on Java/Spring backend engineering and the ability to contribute to React + TypeScript UI delivery as needed. This is a hands-on leadership role, requiring strong technical depth, design capability, and proven experience leading teams in building resilient, production-ready solutions., , You will work in an Agile environment to design, develop, and deploy high-quality services utilizing modern microservices patterns, API-first principles, and containerized cloud-native architectures. This role offers a blended experience of technical leadership and active coding while mentoring others., , Sounds like your kind of challenge?

Your responsibilities, Provide technical leadership and day-to-day guidance to engineers, ensuring alignment to best practices and delivery consistency, Design, build, and support backend services and REST APIs using Java and Spring stack (Boot/Data/REST/Security), Take ownership of solution design, producing architecture documentation and diagrams (e.g., UML), Deliver end-to-end features, including front-end contributions in React + TypeScript where needed, Implement microservices and micro-database patterns with strong API contracts, Build event-driven integrations aligned with enterprise architecture patterns, Integrate workflow engines using BPMN for process orchestration, Ensure production readiness through robust logging, error handling, resilience design, and observability integration, Develop and maintain batch processing capabilities where required, Drive automated testing at all layers (unit, integration), enforce code scanning standards, and remediate findings proactively, Containerize and deploy workloads via Docker and Kubernetes, ensuring secure and efficient CI/CD delivery to cloud environments, Actively participate in Agile practices: backlog grooming, sprint planning, and delivery using Jira, Confluence/Wiki, Note: Detailed project information will be shared during the recruitment process.

8+ years of enterprise application development with strong Backend Engineering focus, 2+ years in formal technical leadership, including mentoring and technical delivery ownership, Strong experience with Java and Spring ecosystem (Boot, Data, REST, Security), Hands-on experience with microservices architecture and micro-database design patterns, Understanding of event-driven systems and integration patterns, Working knowledge of ReactJS and TypeScript (able to deliver UI features when needed), Proficiency in API design and documentation using Swagger/OpenAPI, Practical automated testing skills: JUnit, Mockito, H2, testing tools, Hands-on experience with batch processing jobs (Spring Batch or similar), Strong expertise in error handling, logging, and observability practices, Practical experience with containerization and orchestration: Docker, Kubernetes, Exposure to cloud-native services development and deployment, Familiarity with static code analysis and security scanning tools, Strong Agile delivery experience (Scrum, Jira, Confluence)

Optional, Domain experience in Risk and Compliance, particularly Model Risk Management, Familiarity with Spring Integration, Spring Batch extensions, Knowledge of WebSockets, SSE, or binary protocols, Experience with Workflow Engines (e.g., BPMN, Flowable, Activiti, Drools), Exposure to Micro-frontends architecture and modularization best practices

What we offer, Hybrid work setup – 1 day a week 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

This is how we work on a project, Continuous Deployment, Continuous Integration, documentation, issue tracking tools, testing environments

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.