Senior Full-Stack Engineer: React/TypeScript + Java

Infolet; Kraków; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Relocation package

Medical care for you and family

Multisport card

Life insurance

Job summary

Infolet in Kraków is seeking a Senior Full-Stack Developer to build end-to-end web applications and backend services. You will work across frontend React/TypeScript and Java/Spring Boot backends to deliver dashboards, admin consoles and workflow-oriented interfaces.

You will collaborate across UX, integration, and implementation, focusing on maintainable, performant, and reusable solutions for platform users and internal teams. Strong English and fluent Polish are required.

Qualifications

• Strong experience building modern web apps with React and TypeScript.
• Backend development with Java and Spring Boot.
• Experience designing and consuming REST APIs.
• Understanding frontend state management and component architecture.
• Experience with test automation across frontend and/or backend.
• Ability to work across frontend, backend, UX and integration topics.
• Strong problem-solving and independent work in full-stack environments.
• Good English and fluent Polish.

Responsibilities

• Develop responsive web applications using React and TypeScript.
• Build backend services with Java and Spring Boot.
• Create dashboards, admin consoles and workflow-oriented interfaces.
• Design reusable UI components and interaction patterns.
• Integrate frontend with REST APIs and authentication flows.
• Contribute to automated testing across frontend and backend.
• Collaborate across UX, integration and implementation aspects.
• Build maintainable and performant solutions for platform users and admins.

Skills

React

TypeScript

Java

Spring Boot

REST APIs

State management

Test automation

Full-stack

English

Polish

Tools

MUI

WebSockets

SSE

Job description

Infolet in Kraków is seeking a Senior Full-Stack Developer to build end-to-end web applications and backend services. You will work across frontend React/TypeScript and Java/Spring Boot backends to deliver dashboards, admin consoles and workflow-oriented interfaces.

You will collaborate across UX, integration, and implementation, focusing on maintainable, performant, and reusable solutions for platform users and internal teams. Strong English and fluent Polish are required.