Senior Java Developer

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 are now looking for a talented Senior Backend & Cybersecurity Integration Developer to join our internal team.

Responsibilities:
• Design and development of backend services and microservices for cybersecurity applications
• Development of REST APIs and event-driven interfaces between SIEM, SOAR, AI/ML and external systems
• Integration with SIEM platforms, including security-event ingestion, parsing, normalization, enrichment and incident interfaces
• Integration with SOAR platforms, including incidents/cases, playbooks, response workflows and enforcement connectors
• Implementation of the Cyber Incident Package (CIP) interface between the security analytics and response domains
• Implementation of response and enforcement APIs for network, IAM, security and platform controls
• Development of services supporting incident management, response orchestration, execution tracking and response verification
• Integration of AI/ML analytical outputs such as anomaly scores, behavioral indicators, threat classifications and confidence scores into operational workflows
• Implementation of secure service-to-service communication, authentication, authorization and audit mechanisms
• Development of connectors/adapters for heterogeneous cybersecurity and infrastructure systems
• Contribution to system architecture, API specifications, data models, automated testing, integration testing and technical documentation
• Collaboration with cybersecurity engineers, AI/ML engineers, system architects and other European project partners
• Degree in Computer Science, Software Engineering, Computer Engineering or a related field
• At least 4 years of Java/Spring boot development experience
• Experience designing and implementing RESTful APIs
• Experience with microservices and distributed systems
• Good understanding of event-driven architectures and asynchronous messaging
• Experience with relational and/or NoSQL databases
• Experience with Docker and Linux environments
• Familiarity with authentication and authorization technologies such as OAuth 2.0, OpenID Connect, JWT and PKI/certificates
• Understanding of cybersecurity concepts including security events, alerts, incidents, logs, network security and access control
• Good written and spoken English Experience in one or more of the following areas will be considered a strong advantage:
• SIEM technologies
• SOAR platforms and security orchestration/playbook development
• Kafka, RabbitMQ or equivalent messaging/event-streaming technologies
• Elasticsearch / OpenSearch
• IDS/IPS/NDR technologies and integration with security telemetry
• Threat Intelligence and standards such as STIX/TAXII
• Cybersecurity frameworks such as MITRE ATT&CK
• Integration with IAM, firewall, network-management or endpoint-security APIs
• Kubernetes
• DevSecOps and CI/CD pipelines
• AI/ML integration in production systems
• Defence, C4ISR, mission-critical or EU research projects
• 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
• Stable and enjoyable working environment