# Senior Java Developer

> iKnowHow S.A. · Nea Ionia, Greece (Hybrid) · — · Posted 2026-09-09

**Workplace:** hybrid

**Department:** Eurobank

## Description

**iKnowHow Group** is a leading Software & Robotics Solutions group of companies operating internationally for over 24 years, with 300+ professionals delivering innovative technology solutions across Energy, Telecommunications, Banking & Financial Services, and Public Sector industries. The group is structured into specialized subsidiaries, each focused on distinct technology domains and market verticals.

**iKnowHow S.A**., as the cornerstone of the group, utilizes state-of-the-art technologies and handles end-to-end internal and external project development, from conception to completion. Our portfolio spans Data & AI platforms, enterprise integration, cloud-native applications, and digital transformation initiatives for major organizations in private and public sectors.

We are now looking for a **Senior Java Developer** with strong technical skills and solid working experience to work in outsourced challenging projects.

**Responsibilities:**

-   Design and build a centralized authorization system that governs identity validation and access decisions across the platform

-   Implement business policy and transaction controls in a way that keeps other services simple and decoupled from security logic

-   Ensure all security-relevant actions are logged, traceable, and auditable to meet enterprise compliance standards

-   Optimize the system for high-speed, low-latency decision-making at scale

-   Architect for high availability and resilience, ensuring the system keeps functioning during upstream outages

-   Build with regulatory compliance in mind, including data protection and financial-sector requirements

-   Work closely with architecture teams throughout the design and delivery process, from concept to implementation

-   Turn complex security requirements into clean, maintainable code

-   Uphold strong testing standards, particularly for security-critical functionality

## Requirements

-   Bachelor's degree in Information Technology, Computer Science, Business Administration, Engineering, or a related field
-   5+ years of hands-on Java development (newer versions)
-   Deep expertise in Spring Boot application development and auto-configuration
-   Hands-on experience implementing JWT-based stateless authentication, OAuth 2.1 / OIDC resource server configuration, filter chains, and method-level security
-   Practical experience writing aspects for cross-cutting concerns (authorization, auditing, masking)
-   Understanding of aggregates, domain services, repositories, and the importance of keeping domain objects free of infrastructure concerns
-   Experience in Spring Data Redis / Lettuce
-   Experience in JUnit 5, Mockito, Spring Boot Test or Test containers
-   Experience deploying stateless Spring Boot services on Kubernetes

**Nice to have:**

-   Experience with Open Policy Agent (OPA) or Drools BRMS

-   Familiarity with HashiCorp Vault and spring-vault-core
-   Knowledge of GDPR, DORA, or PSD2 in a technical context
-   Entra ID / Azure AD OIDC integration experience
-   Experience in core banking or financial services platforms
-   API Gateway (policy enforcement, coarse-grained AuthZ)

## Benefits

-   An attractive salary package
-   Private health insurance plan
-   Career development and growth opportunities
-   Continuous training via personalized seminars
-   An amazing private & open-office workspace in Athens #LI\_Hybrid
-   Flexibility to a remote work model as well
-   Stable and enjoyable working environment

## Apply

[Apply at iKnowHow S.A.](https://apply.workable.com/ikh/j/3C56E14469/apply)

---
Powered by [Workable](https://www.workable.com)