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Senior Backend Developer
  • Kraków
Senior Backend Developer
Kraków, Kraków, Lesser Poland Voivodeship, Polska
Mindbox Sp. z o.o.
8. 2. 2026
Informacje o stanowisku

Senior Backend Developer

Miejsce pracy: Kraków

Technologies we use

Expected

  • Java
  • Spring Boot
  • Docker
  • Kubernetes
  • Kafka
  • SQL

Operating system

  • Linux

About the project

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.

Your responsibilities

  • Design APIs and create architectural artefacts such as gap analysis, low-level designs, and data models.
  • Develop and optimize back-end microservices applications with a focus on security, authentication, and performance.
  • Work on distributed systems using Spring Boot, Docker, Kubernetes, and service mesh technologies.
  • Build and configure Kafka clusters and develop producers/consumers for high-throughput messaging.
  • Implement monitoring and observability solutions using Splunk, Grafana, Prometheus, Jaeger, Kiali, and OpenTelemetry.
  • Collaborate on cloud and DevOps initiatives, including VPC, firewall, IAM, and cost optimization.
  • Ensure system reliability and scalability for real-time transaction processing.
  • Note: Detailed project information will be shared during the recruitment process.

Our requirements

  • 9+ years of engineering experience in back-end microservices development.
  • Experience in Java development,
  • Strong knowledge of JVM tuning, troubleshooting, and performance optimization.
  • Experience with distributed system design, Spring Boot, and microservices architecture.Proficiency in Docker, Kubernetes, and service mesh.
  • Hands-on experience with Kafka (cluster setup and development).
  • Familiarity with cloud platforms, networking, and infrastructure (Linux OS, storage, load balancing, Kubernetes CNI).
  • Strong SQL coding skills and understanding of distributed databases.

This is how we organize our work

This is how we work

  • agile
  • scrum

This is how we work on a project

  • Continuous Deployment
  • Continuous Integration

What we offer

  • We are open to the employment form according to your preferences
  • Work with experienced and engaged team, willing to learn, share knowledge and open for growth and new ideas
  • Hybrid working system (Warsaw/Cracow)
  • Mindbox is a dynamically growing IT company, but still not a large one – everybody can have a real impact on where we are going next
  • We invest in developing skills and abilities of our employees
  • We have attractive benefits and provide all the tools required for work f.e.computer
  • Interpolska Health Care, Multisport, Warta Insurance, training platform (Sages)

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.

Creating an inspiring place to thrive for the talented, we use their expertise and courage to introduce the technology of the future into your business. - This is the foundation of Mindbox and the goal of our business and technology journey. We operate and develop in four areas:

? Autonomous Enterprise - automation of business processes using RPA, OCR, and AI.

?Business Managment Systems ERP - we implement, adapt, optimize, and maintain flexible, safe, and open ERP of production and distribution companies worldwide.

?Talent Network - we provide access to the best specialists.

☁ Modern Architecture - we build integrated, sustainable, and open CI / CD environments based on containers enabling safe and more frequent delivery of proven changes in the application code.

We treat technology as a tool to achieve a goal. Thanks to our consultants reliability and proactive approach, initial projects usually become long-term cooperation. For over 16 years, it has provided various services to support clients in digital transformation.

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