Senior Full-Stack Java Engineer: React, Spring Boot & AWS

Us3 Ltd; Wrocław; On-site; PLN 180,000 - 240,000; Full time

Job summary

Us3 Ltd seeks an experienced Senior Full-Stack Java Engineer to modernise enterprise platforms and deliver scalable, secure web and mobile apps. You will work across backend services, frontend technologies, cloud infrastructure, and AI-driven solutions while evolving legacy systems and promoting engineering best practices.

Key responsibilities include building REST/GraphQL APIs, modernising Struts, migrating to modern architectures, and driving CI/CD and security improvements in an agile

Qualifications

• Proven track record as a Senior Full-Stack Java Engineer.
• Strong Java and Spring Boot experience.
• Front-end skills with React and TypeScript; JSP knowledge is a plus.

Responsibilities

• Design and develop backend apps with Java 8 and Spring Boot 2.7.
• Build responsive web apps using React, TypeScript, and JSP.
• Modernise legacy Struts apps and migrate to modern architectures.

Skills

Java

Spring Boot

React

TypeScript

REST APIs

GraphQL

Kafka

SQL

NoSQL

CI/CD

Docker

Cloud platforms

Security best practices

Agile

Git

Maven

npm/pnpm

Struts (legacy)

GitHub Copilot

Tools

Struts 1.1

Docker

Maven

npm/pnpm

Git

GitHub Copilot

AWS

GCP

Azure

Job description

Us3 Ltd seeks an experienced Senior Full-Stack Java Engineer to modernise enterprise platforms and deliver scalable, secure web and mobile apps. You will work across backend services, frontend technologies, cloud infrastructure, and AI-driven solutions while evolving legacy systems and promoting engineering best practices.

Key responsibilities include building REST/GraphQL APIs, modernising Struts, migrating to modern architectures, and driving CI/CD and security improvements in an agile