Fullstack Developer

Quick Facts

• Role: Fullstack Developer (frontend-heavy)

• Project focus: Modern digital products and applications for end users in the financial sector

• Hybrid work: Krakow, 6 days in the office per month

Description

You will design, develop, and maintain responsive web interfaces with a strong emphasis on frontend development in TypeScript, React, and Next.js. The role also includes fullstack integration with backend services built in Java 21 and Spring Boot, covering end-to-end features and API contract verification. You will collaborate with product, UX, backend, and data teams to refine user journeys, data contracts, and acceptance criteria.

Responsibilities

• Design, develop, and maintain responsive user interfaces in TypeScript, React, and Next.js

• Build product functionality end-to-end: user interactions, state management, and backend integration

• Collaborate across product, UX, backend, and data teams to improve user journeys, data contracts, and acceptance criteria

• Integrate with Java 21 / Spring Boot services via REST APIs; verify contracts and data model changes

• Create clean, well-structured frontend code with good separation of concerns and state management practices

• Diagnose and resolve issues spanning UI, API integrations, and production environments

• Participate in frontend and backend testing (unit, integration, regression)

• Ensure quality, security, and readiness for deployment through code review, monitoring, logging, and performance analysis

Requirements

• 3–5 years of software development experience

• Very strong knowledge of TypeScript, React, and Next.js for end-user web applications

• Strong understanding of modern frontend application architecture (component design, state management, routing, API integration, interface accessibility)

• Experience delivering end-to-end features including browser and backend service integration

• Java and Spring Boot knowledge enabling backend work, with ease working in REST API and integration contracts

• Focus on clean, maintainable, secure code; participate in code review; diagnose problems in UI and API

• Strong teamwork skills and ability to communicate technical decisions and trade-offs to non-technical stakeholders

Benefits

• Collaboration based on B2B contract

• Hybrid work model in Krakow (6 office days per month)

• Professional recruitment process with feedback regardless of hiring decision