Full-Stack Developer (Data Fabric)

Quick Facts

• Role: Full-Stack Developer (Data Fabric)

• Collaboration model: B2B

• Work location: Kraków, 6–8 days per month in the client office (travel costs reimbursed additionally)

• Rate: 135 PLN/hour net + VAT

Description

You will join a team developing and evolving Data Fabric solutions. This is a role for someone comfortable working both on the frontend and with integrations to the backend layer—building web applications and APIs that support Data Fabric services.

Responsibilities

• Create and develop web applications using TypeScript, React, and Next.js

• Build responsive, accessible, and business-aligned interfaces

• Deliver end-to-end functionality—from browser interactions and state management to API integration

• Collaborate with product, UX, backend, and data teams on user journeys, data contracts, and acceptance criteria

• Develop and maintain clean, component-based frontend code with clear responsibility boundaries

• Integrate with Java 21 / Spring Boot services; work with APIs and data contracts

• Analyze and resolve issues across frontend, API integrations, performance, and system stability

• Create and maintain unit, integration, and regression tests

• Improve production quality through logging, monitoring, performance analysis, and operational support

• Participate in code reviews, technical decisions, and deployment preparation

Requirements

• Very strong knowledge of TypeScript, React, and Next.js; experience building web applications

• Solid understanding of modern frontend architecture: components, state management, routing, API integration, and accessibility

• Experience delivering fullstack features spanning frontend and service-layer/backend integration

• Practical knowledge of Java and Spring Boot and confidence in backend integration work

• Experience with REST APIs, DTOs, authentication flows, and integration/data contracts

• Ability to write readable, scalable, and maintainable code

• Knowledge of secure application development (token handling, access control, secure data processing)

• Ability to diagnose issues at the UI/API boundary

• Good communication skills and ability to discuss technical decisions and trade-offs with both technical and business stakeholders

Benefits

• B2B cooperation

• 135 PLN/hour net + VAT

• Kraków-based role with 6–8 days per month on-site at the client office (travel costs reimbursed additionally)

• Work on Data Fabric web applications and APIs across UI and backend integration