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Offer summary

(Summary generated by AI based on the full job description)

The project involves building high-performance, distributed systems focused on backend and DevOps. Key technologies include Java, Spring Boot, Kubernetes, AWS, Jenkins, GitHub, Swagger (OpenAPI 3.0), OAuth 2.0, Kong API Gateway. Responsibilities cover API development, code quality assurance, implementing engineering standards, automated testing (TDD), stakeholder collaboration, and continuous process improvement.

you can start ASAP

Backend Developer

Company: Mindbox Sp. z o.o.

from: 13 July 2026
to: 12 August 2026
29 000 - 33 000 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

Operating system

Windows

Our requirements

  • Senior-level expertise in Java and Spring Boot development
  • Hands-on experience with Kubernetes for container orchestration
  • Practical knowledge of cloud environments (AWS)
  • Solid understanding of CI/CD pipelines and tools: Jenkins (shared libs), GitHub, Maven, Groovy, Jira
  • Strong REST API design skills with best-practices (Swagger, OpenAPI 3.0, microservices architecture, JSON)
  • Knowledge of security and authorization protocols, especially OAuth 2.0; experience with Kong API Gateway
  • Experience in Agile environments with practices like TDD, paired programming, automated testing
  • Ability to translate business requirements into robust technical solutions
  • Proven problem-solving skills and ability to provide innovative solutions
  • Passion for learning new technologies and contributing to knowledge-sharing culture

Optional

  • Experience with message delivery systems, event-driven architectures
  • Familiarity with observability stacks and performance tuning in cloud-native environments
  • Mentorship experience, promoting engineering excellence within teams

Your responsibilities

  • Develop and deliver high-quality software applications in line with agreed requirements
  • Work in a multi-disciplinary Agile team using modern design principles and evolving technologies
  • Define, implement, and govern quality engineering standards, maintaining expert knowledge in the required tech stacks
  • Write efficient, maintainable, and reusable Java code meeting Definition of Done, considering technical dependencies and NFRs (non-functional requirements)
  • Conduct unit tests and contribute to automation test coverage using Agile testing methodologies (TDD)
  • Ensure robust API design aligned with industry best practices (OpenAPI 3.0, Swagger)
  • Collaborate closely with stakeholders, fostering clear communication and effective working relationships
  • Champion continuous improvement in tooling, processes, and systems through innovation and best practices
  • Note: Detailed project information will be shared during the recruitment process.

About the project

At Mindbox we connect top IT talents with technology projects for leading enterprises across Europe.
As a part of an Agile, cross-functional team, you’ll play a critical role in designing and developing high-performance, distributed systems using modern technology stacks. Your responsibilities will include building APIs, ensuring top-tier code quality, and applying engineering best practices for security, compliance, and scalability.
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.
Company

What we offer

  • Flexible cooperation model – choose the form that suits you best
  • (B2B, employment contract, etc.)
  • Hybrid work setup – remote days available depending on the client’s arrangements - 2 days 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.
Backend Developer
29k–33k zł / mth. (B2B)
I apply to:
Mindbox Sp. z o.o.
Kraków, Lesser Poland
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