Backend Developer

Backend Developer

Miejsce pracy: Kraków

Technologies we use

Expected

• Java
• Spring Boot

Operating system

• Windows

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.

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.

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

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

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.