Backend Developer

Backend Developer

Miejsce pracy: Kraków

Technologies we use

Expected

• Java
• Spring Boot
• Kubernetes
• GitHub
• Jenkins
• Maven
• Groovy
• Swagger
• OpenAPI

Operating system

• Windows

About the project

We are seeking a Senior Java Developer to join our Messaging Delivery Platform team, responsible for delivering critical capabilities that enable communication with customers through multiple outbound channels. The platform is in the process of modernization and standardization, bringing opportunities to work on distributed systems using modern technology stacks in an Agile product team environment.

This role ensures delivery of high-quality, efficient, and secure solutions aligned with enterprise requirements, technical best practices, and industry standards.

Sounds like your kind of challenge?

This is how we organize our work

This is how we work

• agile

Your responsibilities

• Design, build, and maintain scalable, high-quality applications and distributed systems based on agreed requirements.
• Work within an agile product team to implement solutions using modern technologies and continuously evolve to adopt new paradigms.
• Ensure high code quality, adhering to best practices, industry standards, and internal definitions of done.
• Conduct unit testing and contribute to establishing appropriate automated test coverage (TDD principles).
• Collaborate closely with team members and stakeholders, maintaining clear and proactive communication.
• Define and govern technical quality standards, contributing to consistent platform modernization.
• Provide innovative technical solutions for complex business challenges while ensuring compliance and security standards.
• Promote engineering excellence through coaching and mentoring.
• Note: Detailed project information will be shared during the recruitment process.

Our requirements

• Extensive hands-on experience with Java (8/11+) and Spring Boot, delivering enterprise-grade applications.
• Proficiency in Kubernetes for container orchestration and deployment.
• Strong practical experience with Cloud technologies (AWS preferred).
• Knowledge and implementation experience of CI/CD pipelines using tools such as GitHub, Jenkins (shared libraries), Maven, Groovy, and Agile practices.
• In-depth understanding of API design standards and best practices: Swagger and OpenAPI 3.0, REST, JSON, Microservices.
• Experience with authentication/authorization frameworks (OAuth 2), and API gateways (e.g., Kong API Gateway).
• Familiarity with Agile testing discipline including TDD, as well as solid experience in Agile/Scrum environments.
• Ability to translate business requirements into technical solutions, providing innovative and scalable designs.
• Commitment to continuous learning and staying informed on current tools and technologies.

Optional

• Experience driving platform modernization initiatives.
• Exposure to observability solutions and performance optimization.

What we offer

• Flexible cooperation model – choose the form that suits you best (B2B, employment contract, etc.)
• Hybrid work setup – 2 days on-site, 3 days remote/week
• 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

• Clean Code
• TDD
• Continuous Deployment
• Continuous Integration
• documentation
• issue tracking tools
• test automation
• testing environments
• manual tests

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.