Backend Java Developer

Backend Java Developer - iKnowHow Group

iKnowHow Group, with over 24 years of experience and 300+ professionals, is a dynamic international technology company delivering innovative solutions across Energy, Telecommunications, Banking & Financial Services, and the Public Sector. Through specialized subsidiaries, we offer domain expertise in Health and Robotics, blending industry knowledge with future-ready technologies.

iKnowHow S.A. delivers end-to-end project development, turning strategy into scalable solutions. Our portfolio includes Data & AI platforms, enterprise integration, cloud-native applications, and large-scale digital transformations.

We are seeking an experienced Backend Java Developer with strong technical skills and solid working experience to join our internal software team. We look for curious, driven individuals who want to create impact through technology and grow with us.

Responsibilities:

• Develop demanding project tasks.
• Familiarity with Waterfall implementation methodologies.
• Transform requirements into functionalities.
• Ensure alignment of the solution with client needs and the architecture team.
• Implement integrations with other applications and/or modules.
• Assist with deployment and configuration management.

Technical Skills & Experience:

• 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.

What We Offer:

• Career development and growth opportunities.
• An amazing private & open-office workspace in Athens.
• Medical plan and life insurance for you and your family.
• Flexible hybrid working model (office & remote).
• Continuous training & learning opportunities via personalized seminars.
• The opportunity to work in a diverse environment with talented colleagues.