Senior Full Stack Engineer

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

 

We are seeking an experienced Technical Lead with a primary focus on Java/Spring backend engineering and the ability to contribute to React + TypeScript UI delivery as needed. This is a hands-on leadership role, requiring strong technical depth, design capability, and proven experience leading teams in building resilient, production-ready solutions.

You will work in an Agile environment to design, develop, and deploy high-quality services utilizing modern microservices patterns, API-first principles, and containerized cloud-native architectures. This role offers a blended experience of technical leadership and active coding while mentoring others.

 

Sounds like your kind of challenge? 

What you’ll be doing

  • Provide technical leadership and day-to-day guidance to engineers, ensuring alignment to best practices and delivery consistency
  • Design, build, and support backend services and REST APIs using Java and Spring stack (Boot/Data/REST/Security)
  • Take ownership of solution design, producing architecture documentation and diagrams (e.g., UML)
  • Deliver end-to-end features, including front-end contributions in React + TypeScript where needed
  • Implement microservices and micro-database patterns with strong API contracts
  • Build event-driven integrations aligned with enterprise architecture patterns
  • Integrate workflow engines using BPMN for process orchestration
  • Ensure production readiness through robust logging, error handling, resilience design, and observability integration
  • Develop and maintain batch processing capabilities where required
  • Drive automated testing at all layers (unit, integration), enforce code scanning standards, and remediate findings proactively
  • Containerize and deploy workloads via Docker and Kubernetes, ensuring secure and efficient CI/CD delivery to cloud environments
  • Actively participate in Agile practices: backlog grooming, sprint planning, and delivery using Jira, Confluence/Wiki

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

What you get in return

  • Flexible cooperation model 
  • Hybrid work setup – remote days available depending on the client’s arrangements – 1 day 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 

Who we’re looking for

  • 8+ years of enterprise application development with strong Backend Engineering focus
  • 2+ years in formal technical leadership, including mentoring and technical delivery ownership
  • Strong experience with Java and Spring ecosystem (Boot, Data, REST, Security)
  • Hands-on experience with microservices architecture and micro-database design patterns
  • Understanding of event-driven systems and integration patterns
  • Working knowledge of ReactJS and TypeScript (able to deliver UI features when needed)
  • Proficiency in API design and documentation using Swagger/OpenAPI
  • Practical automated testing skills: JUnit, Mockito, H2, HTTP testing tools
  • Hands-on experience with batch processing jobs (Spring Batch or similar)
  • Strong expertise in error handling, logging, and observability practices
  • Practical experience with containerization and orchestration: Docker, Kubernetes
  • Exposure to cloud-native services development and deployment
  • Familiarity with static code analysis and security scanning tools
  • Strong Agile delivery experience (Scrum, Jira, Confluence)

Desirable / Nice to Have

  • Domain experience in Risk and Compliance, particularly Model Risk Management
  • Familiarity with Spring Integration, Spring Batch extensions
  • Knowledge of WebSockets, SSE, or binary protocols
  • Experience with Workflow Engines (e.g., BPMN, Flowable, Activiti, Drools)
  • Exposure to Micro-frontends architecture and modularization best practices

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. 

Senior Full Stack Engineer

Kraków

B2B

1600 - 1800 pln/md netto + VAT

Apply for position

I will handle your recruitment

Marek Lemański

SUPPORT & BENEFITS

Private healthcare

Fast access to doctors and medical tests. 

Mindbox fully covers the individual package. You can extend the coverage to your partner and family on preferential terms. A wide network of medical providers and clear rules for everyday use.

Multisport

Energy that pays off.

We cover 50% of the card cost. You get access to thousands of sports facilities across Poland, plus a convenient mobile app. Additional cards for family members are available.

Training & development

Practical support for your career growth.

We co‑fund courses, certifications and conferences under a clear Training Policy. You also get access to a library of recorded webinars and trainings – available whenever you need them.

Eyewear or contact lenses co‑funding

Clear vision means comfortable work.

Up to PLN 500 every two years, with an additional PLN 300 available in justified cases. Simple reimbursement, regardless of your form of cooperation.

Group life insurance

Real protection from day one.

Option I is fully funded by Mindbox, Option II is co‑funded. You can include your partner and adult children, with coverage that also applies to treatment and hospitalisation abroad.

Ongoing support from the Talent Network Development

You’re not on your own in a project.

Regular contact, quick response and a partnership‑based approach. You focus on your work — we help take care of the rest.

Regular integration meet‑ups

Relationships that work beyond the project.

Cyclical meet‑ups for contractors in major cities across Poland. A space to talk, exchange experience and stay in real contact with the Mindbox team.

Annual company‑wide integration

One event. The whole community.

A two‑day company gathering with accommodation, transport and a full activity programme. Time to connect teams from across Poland and build shared experiences.

New baby gift

Important moments matter to us.

When a child is born, we prepare a personalised gift. All it takes is a short message to the Talent Network Development team.

do you like
like our offer?

the recruitment process

We support you at every stage

Submit your CV

Apply directly for a selected job offer or simply send us your CV.

Recruiter call

If your profile matches the role or we have a good opportunity for you, a recruiter will get in touch with you.

Profile shared with the client

After the call, we recommend your profile to the client. This is your first real step toward a specific project.

Project interview

If the client wants to proceed, we arrange the meeting. We prepare you for the interview and stay in close contact.

Feedback and decision

You receive feedback regardless of the outcome. If it’s a match, we present an offer.

Contract 100% online

All formalities are handled remotely. Fast, convenient and straightforward.

Ongoing support

Our IT Talent Network team supports you throughout the entire project.

Referral Program

Refer a friend & get up to 6,000 PLN

Do you know an IT specialist who could be a good fit for one of our projects? Share their contact details with us and we’ll take care of the rest.

You can receive up to 6,000 PLN for a successful referral.