Full-Stack Java Developer (R&D Engineer)

Luxembourg | CDI | Up to 80,000 EUR

About the Company

Our client is a leading provider of financial software solutions in Luxembourg, serving major international financial institutions.

Operating in a stimulating and dynamic environment, the company is investing heavily in R&D and digital transformation to build next-generation platforms supporting fund administration, accounting and investor services.

The Opportunity

As part of its continued growth, our client is hiring a Full-Stack Java Developer (R&D Engineer) to join a strategic long-term product initiative.

You will contribute to the development of an innovative low-code platform aimed at increasing productivity and accelerating application development. The platform leverages:

• An embedded UI kit

• A unified API layer

• Direct integration with core financial engines

• Modern frontend frameworks aligned with established design systems

This is a highly hands-on full-stack role requiring strong technical expertise and ownership.

A technical test is part of the recruitment process. This role is intended for experienced Full Stack Developers only.

Responsibilities

• Design, implement and maintain core features of the low-code platform

• Develop backend services using Core Java and Spring Boot

• Build modern frontend applications using React, Vue or similar technologies

• Design and implement REST APIs

• Collaborate with Product teams to translate user needs into scalable solutions

• Ensure high-quality, maintainable and standards-compliant code

• Participate in peer code reviews

• Troubleshoot and resolve issues across the application stack

• Take ownership of deliverables from design to deployment

Required Skills

• 3 to 6 years of experience in Full Stack development

• Strong expertise in Core Java and J2EE technologies (JMS, EJB, JDBC, JPA)

• Solid experience with Spring Framework and Spring Boot

• Experience with modern frontend frameworks such as React, Vue or Svelte

• Strong understanding of REST API architecture

• Experience with relational databases such as Oracle or PostgreSQL

• Experience writing unit tests using JUnit

• Familiarity with testing frameworks and monitoring tools

• Knowledge of clean code principles and software design patterns

Experience in R&D environments or low-code platforms is a plus.

Profile

• Analytical and solution-oriented mindset

• Strong ownership and accountability

• Comfortable in an international environment

• English mandatory

• Additional European languages are considered an asset

No specific product knowledge is required for this role.

Contract Details

• Permanent contract (CDI) with probation period

• Salary up to 80,000 EUR gross per year

• Start date: ASAP

• 1 day per week home office initially, subject to review after probation period

• Candidates must be based in Europe

• No visa sponsorship available