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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on building and maintaining backend solutions in a microservices architecture with front-end contributions as needed. Key stack includes Java, Spring Boot/Data/REST/Security, plus React + TypeScript for UI, Docker and Kubernetes for containerization and Swagger/OpenAPI for API documentation. Responsibilities cover designing and implementing services and APIs, producing architecture documentation, implementing event-driven and micro-database patterns, integrating BPMN workflows, ensuring production readiness (logging, observability, testing), driving automated tests and security scans, supporting CI/CD and mentoring the engineering team.
from: 23 September 2026
to: 23 October 2026
32 000 - 36 000 złnet (+ VAT)/ mth.B2B contract (full-time)
Offer parameters
level:senior
working mode:hybrid
location:Kraków, Lesser Poland
Kraków, Lesser Poland
Requirements
Expected technologies
Java
Spring
React.js
TypeScript
Swagger
OpenAPI
JUnit
Mockito
Jira
Confluence
Optional technologies
BPMN
Operating system
Windows
Our requirements
- 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, HTTP 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
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.
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?
This is how we work on a project
- Continuous Deployment
- Continuous Integration
- documentation
- issue tracking tools
- testing environments
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.
What we offer
- Flexible cooperation model – choose the form that suits you best (B2B, employment contract, etc.)
- 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
Benefits
- sharing the costs of sports activities
- private medical care
- sharing the costs of professional training & courses
- life insurance
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.
Senior Full Stack Engineer
32k–36k zł / mth. (B2B)
I apply to:
Mindbox Sp. z o.o.
Kraków, Lesser Poland
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