Mid Fullstack Application Developer (Integration)

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 Fullstack Application Developer to work in new challenging outsourced projects and contribute to ongoing and upcoming projects, related to full-lifecycle development and maintenance of Banking Products.

Responsibilities:

• Develop, unit and ST testing API services, orchestration flows and integration adapters
• Implement data-transformation templates and API payload handlers, contributing to CI/CD pipeline development and automated deployment scripts
• Support environment provisioning and developer onboarding
• Execute SIT and performance test automation scripts.
• Resolve integration defects during SIT, NFRT, UAT and Hypercare phases
• Provide Warranty-period on-call support and incident resolution for integration issues

Requirements

• Bachelor’s degree in Information Technology, Computer Science, Computer Engineering or any related field.
• 3+ years software / application development experience
• REST API service development & testing
• Backend development (Java, Python or Node.js)
• Data transformation & payload handling (JSON / XML)
• Unit testing & automated test scripting
• Integration platform / middleware development
• CI/CD pipeline development (Jenkins, GitLab CI or similar)
• Docker / containerization basics and Git (version control, branching strategies)
• API Gateway integration patterns and Performance / load test scripting (JMeter, Gatling or similar)
• Observability tooling (logging, APM basics)
• Proficient verbal and written communication skills in English.
• Strong collaborative spirit, sense of ownership, and accountability.
• Completion of military obligations if applicable.

Nice To Have:

• Experience in core banking system integrations
• DevSecOps / security-in-pipeline awareness

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
• Stable and enjoyable working environment