Backend Engineer (Java)

Backend Engineer (Java)

At Mindbox we connect top IT talents with technology projects for leading enterprises across Europe. 

 
Join a team that’s redefining the future of banking! We’re looking for a Backend Engineer passionate about building innovative solutions using cutting-edge technologies.
 
We are on a mission to become the leading Banking-as-a-Service (BaaS) provider in the UK. Our solutions are powered by innovative technology and backed by strong financial stability. We’re building a team of visionaries who want to transform the financial industry landscape.
 

Sounds like your kind of challenge? 

#Li-Hybrid - 2 days per month required on-site in Warsaw

What you'll be doing

  • Work as part of a core cross-functional mission team to develop core-banking technology.
  • Deliver and enhance the NatWest Boxed technology product.
  • Support and mentor junior engineers, acting as a subject matter expert.
  • Write clean, elegant, reusable, and well-tested code that’s easy to maintain and extend.
  • Collaborate with stakeholders to shape the direction of NW Boxed engineering and ensure customer interests are at the heart of key decisions.
  • Work across the backend chapter to uphold standards, best practices, and promote innovation.
  • Resolve technical issues collaboratively within the team.

 

What you get in return

  • 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
  • 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 

Note: Detailed project information will be shared during the recruitment process

Who we're looking for

  • Strong practical and theoretical knowledge of Java software development.
  • Proven experience with Spring Boot or Micronaut.Understanding of Kubernetes and Docker.
  • Excellent knowledge of AWS (deployment and configuration).Experience with message-driven architectures (Kafka, event sourcing).
  • Success delivering in an agile environment.
  • Experience working in a highly secure application environment.
  • Ability to act as a subject matter expert and communicate clearly with both technical and non-technical audiences.
  • Understanding how to translate business objectives into data-driven insights.

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. 

Ready to take the next step?

Submit your application! We look forward to reviewing your profile 😊 

Know someone who might be a great fit? 
Feel free to share this opportunity using the referral link: Mindbox Referrals System

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ID: 1971 job_post.published_on: 17/02/2026
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