Senior Java Backend Engineer

At Quento, the ICT arm of the Qualco Group, we deliver comprehensive and innovative solutions across AI, Digital Engineering, Cloud, and Cybersecurity, helping businesses accelerate digital transformation. With a presence in Greece, Luxembourg, and Belgium, and backed by the expertise of the Qualco Group, we combine deep technical knowledge with strategic partnerships to support business growth.

At Quento, we empower our people to innovate and lead in delivering transformative ICT solutions to our clients worldwide. Our high-performing, dynamic, and collaborative environment fosters professional growth at every stage.

Quento Technologies seeks a highly motivated and experienced Senior Java Backend Engineer to join our team and help us build reliable, scalable backend services. You will work with modern Java technologies, cloud-native tools, and distributed systems.

Your responsibilities will entail:

• Develop backend services using Java 17+ and Spring Boot;
• Build and maintain REST and gRPC APIs;
• Develop cloud-native applications on Azure, including deployments on AKS (Kubernetes);
• Work with SQL and NoSQL databases;
• Use Kafka for asynchronous messaging;
• Implement caching solutions such as Redis;
• Create and maintain unit tests;
• Use Docker and CI/CD pipelines for building and deploying services;
• Troubleshoot and improve performance of existing services;
• Ensuring that all activities and duties are carried out in full compliance with regulatory requirements and supporting the continued implementation of the Group Anti-Bribery and Corruption Policy.

Requirements

• 3–5+ years of experience in backend development;
• Strong knowledge of Java (17+) and Spring Boot;
• Experience with Azure and Kubernetes/AKS;
• Good understanding of REST and gRPC;
• Experience with both SQL and NoSQL databases;
• Hands-on experience with Kafka or similar messaging systems;
• Experience with Docker and CI/CD pipelines;
• Familiarity with caching tools like Redis;
• Good problem-solving and communication skills.

Benefits

Your Life @ Qualco 
On top of challenging work environment, we are offering:

💸 Competitive compensation, ticket restaurant card, and annual bonus programs
💻 Cutting-edge IT equipment, mobile and data plan
🏢 Modern facilities, free coffee and beverages, indoor parking, and company bus
👨‍⚕ Private health insurance, onsite occupational doctor, and workplace counselor
🏝️ Flexible working model, hybrid benefits & home equipment benefits
🤸‍♂️ Onsite gym, wellness facilities, and ping pong room
💡 Career and talent development tools
🎓 Mentoring, coaching, personalized annual learning and development plan
🌱 Employee referral bonus, regular wellbeing, ESG and volunteering activities

Your race, gender identity and expression, age ethnicity or disability make no difference in Quento We want to attract, develop, promote, and retain the best people based only on their ability and behavior.

Disclaimer: Quento collects and processes personal data in accordance with the EU General Data Protection Regulation (GDPR). We are bound to use the information provided within your job application for recruitment purposes only and not to share these with any third parties. For more details on the processing of your personal data during the Recruitment procedure, please be informed in the Recruitment Notice, before the submission of your application.

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