Solution Architect

About this role

At Uni Systems, we are working towards turning digital visions into reality. We are continuously growing and we are looking for a Solution Architect to join our UniQue team. What will you be bringing to the team? Lead and shape the end-to-end solution and application architecture of large-scale, distributed, cloud-native systems, aligned with business goals, regulatory obligations, security guidelines, and programme constraints. Produce and maintain architecture deliverables - Architecture Overviews, High-Level Design / Low-Level Designs, integration specifications, and Architecture Decision Records. Provide technical leadership to the architecture and development streams: guide design decisions, run technical workshops, review and sign off technical estimations, and mentor engineers. Communicate architecture vision and trade-offs to programme stakeholders and customer architecture boards, translating technical complexity into clear, actionable guidance. Engineer non-functional requirements with verifiable acceptance criteria. Design integration and interoperability solutions using API-first / contract-first principles and event-driven patterns. Design secure-by-design solutions, applying recognised application-security standards (e.g., OWASP ASVS, ISO/IEC 27001). Define SDLC standards and quality gates, in collaboration with the DevOps team. Requirements What do you need to succeed in this position? University degree in Computer Science, Computer Engineering, Software Engineering, or a related field. At least 12 years in the IT field, with an extensive proven track record as a Solution Architect on complex, large-scale programmes. Demonstrated ability to design and deliver production systems using Java / JEE and/or .NET / C#, with microservices, REST, and containers, across the full development lifecycle. Experience in designing cloud-native and microservice architectures. Hands-on experience with UML / ArchiMate using Sparx Enterprise Architect or a similar architecture-modelling tool. Knowledge of integration technologies: REST, gRPC, SOAP, and web services, as well as message-oriented middleware, ESB, and distributed event streaming (Apache Kafka, RabbitMQ, JMS). Hands-on experience with at least one major cloud platform (Azure, AWS, or GCP). Expertise in Spring / Quarkus / Java EE and Hibernate/JPA, or equivalent .NET expertise; exposure to a modern front-end framework (Angular or React). Familiarity with relational databases (e.g., Oracle, PostgreSQL), NoSQL data stores, and search/indexing engines (e.g., Elasticsearch). Strong communication, facilitation, and stakeholder-management skills; able to build consensus and drive architectural alignment in complex environments. Excellent command of the English language (verbal & written). Nice to have: Experience with Production-scale container orchestration (Kubernetes, OpenShift). Experience with IAM solutions and security token services (OAuth 2.0, OpenID Connect, SAML, Keycloak). Experience with observability stacks (Prometheus, OpenTelemetry, Grafana, ELK, Splunk) and multi-site disaster-recovery design. Experience with CI/CD, DevSecOps toolchains, and performance monitoring. Awareness of AI/ML integration patterns. Certifications such as TOGAF, SAFe, ArchiMate, or major-vendor cloud certifications (Azure / AWS / GCP). Benefits What are we offering to our UniQue IT people? People-first approach and open environment to express your ideas Ticket restaurant - meal vouchers Corporate laptop and equipment Corporate mobile phone subscription Work-life balance and a hybrid work model Health and insurance plan for you and your family members Employee consulting and guidance support by Hellas EAP Continuous training and certifications Discounts on the services and products of our Group’s companies Gift vouchers for major life milestones Special work schedule on summer Fridays and your birthday Our UniQue IT people are the most valuable part of Uni Systems; their knowledge and experience have made us the leading and reliable systems integrator of today and have contributed to our steady financial growth. We have created and are maintaining a stable working environment for our employees, with countless opportunities to innovate and thrive. Our work culture recognizes our UniQue IT people, and supports the free sharing of ideas and the flow of information via open communication while appreciating and effectively utilizing the talents, skills, and perspectives of each employee. At Uni Systems, we are providing equal employment opportunities and banning any form of discrimination on grounds of gender, religion, race, color, nationality, disability, social class, political beliefs, age, marital status, sexual orientation, or any other characteristics. Take a look at our Diversity, Equality & Inclusion Policy for more information.