Senior DevOps Engineer

Location: Athens, Attica, Greece

Department: Quento, Software Engineering

Workplace: hybrid

Description

At Quento Technologies S.A., 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 Technologies S.A. we empower our people to innovate and lead in delivering transformative ICT solutions to our clients worldwide. Quento Technologies S.A. seeks a highly motivated and experienced Senior DevOps Engineer to design, operate, and continuously improve our cloud-native infrastructure on Microsoft Azure. You will support Kubernetes-based platforms, CI/CD pipelines, security, and observability, enabling reliable and scalable application delivery.

Your responsibilities will entail:

• Manage and operate Azure Kubernetes Service (AKS) clusters, including namespaces, resource tuning, and autoscaling;
• Design and maintain CI/CD pipelines using Azure DevOps (YAML) and ArgoCD;
• Build and manage container images using Docker multi-stage builds and Azure Container Registry;
• Implement and operate Istio Service Mesh, including mTLS, traffic routing, and JWT policies;
• Manage Azure infrastructure components such as Application Gateway, API Management, Cosmos DB, PostgreSQL, Redis, Event Hubs, and Blob Storage;
• Implement networking and security best practices (VNets, subnets, private endpoints, firewalls);
• Manage secrets, keys, and certificates using Azure Key Vault;
• Monitor and troubleshoot systems using Azure Monitor and Application Insights;
• Ensure container and storage security using Microsoft Defender;
• 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

• University degree in Computer Science, Engineering, or a related field;
• Hands-on experience managing AKS in production environments;
• Strong knowledge of Kubernetes concepts (deployments, services, HPA, rolling updates);
• Proven experience with Azure DevOps CI/CD pipelines and GitOps practices;
• Experience with Istio configuration and service mesh architectures;
• Solid understanding of Azure networking and security (VNet, private endpoints, WAF, firewalls);
• Experience with Azure Key Vault for secrets and certificate management;
• Strong troubleshooting and operational skills in cloud-native environments;
• Experience working in an Agile environment;

Nice to Have

• Experience with Imperva WAF and advanced API security setups;
• Deep knowledge of Azure API Management;
• Microsoft Certified DevOps Engineer Expert AZ‑400;
• Experience supporting microservice platforms with high availability requirements;
• Familiarity with compliance, security hardening, and zero-trust architectures;
• Experience collaborating closely with backend engineering teams.

Benefits

Your Life @ Qualco Group
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 Technologies S.A. We want to attract, develop, promote, and retain the best people based only on their ability and behavior.

Disclaimer: Quento Technologies S.A. 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.