Solution Architect

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 Solution Architect to act as the end-to-end architecture owner for a regulated digital payments platform and serve as the main liaison with the client Architecture team. In this role, you will maintain architectural integrity across customer channels, API gateway, experience APIs, microservices, event-driven architecture, data stores, security controls, cloud infrastructure, observability, and third-party integrations Your responsibilities will entail: Own and govern the end-to-end solution architecture across business, application, integration, data, security, infrastructure, and operational domains; Act as the primary architecture liaison with the client Architecture team and ensure alignment with enterprise architecture principles and security standards; Maintain and evolve HLDs, LLDs, architecture diagrams, integration views, data flow views, security architecture, and architecture decision records; Govern solution design across mobile apps, web apps, Merchant Back Office, PSD2 APIs, API Gateway, Identity Server, Kafka/RedPanda, SignalR, SQL Server, MongoDB, Redis, AKS, WAF, firewall, SIEM, and Azure services; Review and approve designs related to authentication, authorization, OAuth2, SCA, SSL pinning, HTTP signatures, TLS/mTLS, Key Vault, encryption, RBAC, monitoring, and auditability; Support impact assessment for change requests, integration changes, regulatory requirements, non-functional requirements, and operational readiness; Provide architecture guidance to Technical Leads, DevSecOps, QA, Business Analysts, and development teams during sprint delivery; Ensure solution decisions consider resilience, high availability, scalability, maintainability, observability, security, and compliance; 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. University degree in Computer Science, Engineering, or a related field; Senior solution architecture experience in banking, payments, digital banking, fintech, or regulated enterprise platforms; Strong knowledge of cloud-native architecture, Azure, AKS, API gateways, microservices, event-driven architecture, and integration patterns; Experience with identity, access management, API security, encryption, certificate management, observability, and operational architecture; Ability to produce and govern HLDs, LLDs, integration designs, architecture decision records, and non-functional requirements; Strong communication skills with both technical teams and senior stakeholders; Ability to balance architecture governance with delivery pragmatism. Preferred Qualifications Experience with PSD2, SCA, OAuth2/OIDC, mTLS, SSL pinning, WAF, SIEM, and regulated payment architectures; Familiarity with .NET, Java/Spring Boot or Quarkus, Kafka, Redis, MongoDB, SQL Server, and Kubernetes ecosystems; Experience liaising with enterprise architecture teams in large organisations. 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.