Backend Java Developer (Spring Boot)

iKnowHow Group is a dynamic, international technology company with 24+ years of experience and a team of 300+ talented professionals delivering innovative technology solutions across Energy, Telecommunications, Banking & Financial Services, and the Public Sector.

Through its specialized subsidiaries, it brings domain expertise in areas such as Health and Robotics—blending deep industry knowledge with advanced, future-ready technologies.

At its core, iKnowHow S.A. delivers end-to-end project development - both internal and client-facing - turning strategy into scalable, real-world solutions. Our portfolio spans Data & AI platforms, enterprise integration, cloud-native applications, and large-scale digital transformation initiatives, enabling leading organizations across the public and private sectors to evolve and grow.

We’re looking for curious, driven people who want to create impact through technology—and grow with us.

We are now looking for an experienced Backend Java Developer (Spring Boot) with strong technical skills and solid working experience to work in new challenging outsourced projects.

Responsibilities:

• Development of demanding tasks of the projects.
• Familiarity with Waterfall implementation methodologies.
• Transform requirements into functionalities.
• Ensure the alignment of the solution with the client's needs and especially with the architecture team.
• Implementation of integrations with other applications and/or developed modules.
• Assist with deployment and configuration management.

Requirements

• 3–5 years of professional Java development experience
• Strong proficiency with Spring Boot, Spring Security, Spring Data and RESTful API design

• Hands-on experience with JPA/Hibernate, databases (PostgreSQL), and Maven
• Familiarity with microservices architecture, service discovery (Eureka), and API gateways
• Solid understanding of JWT authentication, WebSocket (STOMP/SockJS), and asynchronous processing
• Ability to read, debug, and refactor existing codebases with minimal guidance

Benefits

• Flexible hybrid working model, working both from the office & remote #LI-Hybrid

• Career development and growth opportunities.
• An amazing private & open-office workspace in Athens.
• Medical plan and life insurance for you and your family.