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Halian | Managed Services, Recruitment Agency & Contract Staffing

Full‑Stack Engineer (Java Spring Boot & React)

Halian | Managed Services, Recruitment Agency & Contract Staffing
Luxembourg · Full-time · Associate

Full‑Stack Engineer (Java Spring Boot & React)

Mission

Design, develop, test, and deploy modern web applications across backend and frontend stacks, within cloud‑ready and containerized environments. Work closely with tech leads, business analysts, developers, and QA teams to deliver high‑quality, scalable solutions.


Responsibilities


Backend (Java / Spring Boot)


  • Develop and maintain APIs, services, and Spring Boot applications.
  • Implement REST, SOAP, and event‑driven integrations (Kafka).
  • Manage data access using JPA/Hibernate.
  • Ensure code quality through unit and integration tests (JUnit, TestNG, Mockito).
  • Deploy and monitor applications on‑premise and in cloud/containerized environments (Docker, CI/CD).
  • Implement secure authentication/authorization (OIDC/OAuth2).


Frontend (React)


  • Develop responsive, modern web interfaces using React (hooks, context API).
  • Build reusable UI components and design‑system elements.
  • Integrate REST APIs (JSON).
  • Ensure quality through unit and component testing (Jest, React Testing Library).
  • Manage build and CI/CD pipelines (NPM, Babel, Vite, Azure DevOps).


Tech Stack


  • Backend: Java 17+ (ideally 21), Spring Framework 6+, Spring Boot 3+, Kafka, JPA/Hibernate, Maven, Git, Docker, Azure DevOps.
  • Frontend: React, JavaScript, HTML5/CSS3, Jest, RTL, NPM, Babel, Vite.
  • Security: OIDC / OAuth2.


Nice to Have


  • Micro‑services integration (Apache Camel or Spring Integration).
  • Workflow/process engines (Temporal).
  • Strong full‑stack experience with React + Java.

Key Skills

Ranked by relevance

react spring boot java docker npm javascript responsive apache testng kafka maven junit cicd git ui
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Country Guide

Luxembourg

High-value international enterprise and fintech hub

Posted
Apr 20, 2026
Type
Full-time
Level
Associate
Location
Luxembourg
Company
Halian | Managed Services, Recruitment Agency & Contract Staffing

Industries

Banking

Categories

Information Technology Consulting

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