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Offer summary
(Summary generated by AI based on the full job description)
The project involves building and maintaining a full stack web application. The main stack is Java (Spring Boot) (~75%) and React / Next.js + TypeScript (~25%). Responsibilities include designing APIs and data flows, developing backend and frontend, ensuring test coverage (JUnit, Vitest, Playwright), observability and code quality, and collaborating with UX and data teams. Required skills include database design, migrations and monitoring practices. Optional experience with Spark, Next.js, cloud environments and IaC. Benefits include health care, Multisport, insurance plus training budget and high-quality equipment.
from: 28 September 2026
to: 28 October 2026
28 000 - 31 000 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 Boot
React
TypeScript
Optional technologies
Next.js
Operating system
Linux
Our requirements
- Proven experience with Java/Spring Boot backend development.
- Strong skills in React + TypeScript application development.
- Familiarity with state management and data-fetching patterns in frontend apps.
- Hands-on experience with database design and migration.
- Understanding of observability practices and monitoring tools.
- Exposure to automated testing strategies across the stack.
- Curiosity, collaboration, and structured problem-solving mindset.
Optional
- Developers with an understanding of data or experience in data engineering (Spark, including event-driven processing) will be welcome.
- Knowledge of Next.js or other modern frontend frameworks.
- Experience in cloud-native environments.
- Practice with infrastructure as code and deployment automation.
Your responsibilities
- Develop and maintain Java (Spring Boot) backend services and React/Next.js frontends.
- Ensure end-to-end delivery of product features, integrating APIs, data, and UI.
- Collaborate with UX, backend, and data teams to refine features and user journeys.
- Write clean, secure, and reusable code with solid testing coverage (JUnit, Vitest, Playwright).
- Support observability, performance, and code quality standards.
- Note: Detailed project information will be shared during the recruitment process.
About the project
As a Full Stack Developer, you’ll work across the entire stack, focusing on Java (Spring Boot) backend (~75%) and React/Next.js TypeScript frontend (~25%). You’ll design robust APIs, data flows, and responsive UIs aligned with modern engineering standards in a cloud-native environment.
Sounds like your kind of challenge?
This is how we organize our work
This is how we work
at the client's siteagilekanban
This is how we work on a project
- Continuous Deployment
- Continuous Integration
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
- Hybrid work setup – 2x/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.
Full Stack Developer
28k–31k zł / mth. (B2B)
I apply to:
Mindbox Sp. z o.o.
Kraków, Lesser Poland
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