09/24/2026 updated
100 % available
Senior Enterprise & Solutions Architect | Cloud, AI & Systems Integration
Athens, Greece
Worldwide
Bachelor in Informatics, Technological Educational Institute of Athens, Faculty of Technological AppAbout me
Senior Enterprise & Solution Architect | 11+ years in tech, 7+ in architecture. I help businesses design scalable cloud and integration solutions, modernize legacy systems, and plan IT transformations. Experience across energy, banking and public sector; TOGAF and AI solution assessment.
OAuth 2.0KeycloakOIDCGCPJava (Programming Language)Applications ArchitectureMicrosoft AzureCloud ComputingData ArchitectureEnterprise Architecture FrameworkInformation ArchitectureEnterprise ArchitectureIntegrated Architecture FrameworkSoftware ArchitectureSAP HANA
Enterprise & Solution Architecture
Expertise in Enterprise and Solution Architecture: Strategic IT Roadmap Planning, Business-IT Alignment, As-Is/To-Be/Transition Architecture, Legacy Modernization, and ERP Transformation. Use of TOGAF principles to define governance frameworks and deliver enterprise-scale modernization initiatives.
AI-Augmented ArchitectureHands-on experience in AI Solution Evaluation and Integration, Agentic AI Architecture Patterns, Retrieval-Augmented Generation (RAG), Agent-to-Agent (A2A) Protocols, Model Context Protocol (MCP), and LLM Integration Patterns in enterprise contexts. Assessment of AI platforms for interoperability and alignment with architectural standards.
Cloud & Microservices ArchitectureKnowledge of Hybrid and Multi-Cloud environments (AWS, Azure, GCP), Microservices and Event-Driven Architecture using Apache Kafka, containerization strategies with Docker, and CI/CD Pipeline Strategy. Design of scalable, high-performance distributed systems integrating application, data, and messaging layers.
Governance & FrameworksProficiency in Architecture Governance and Principles, TOGAF, Enterprise Integration Patterns (EIP), Reference Architectures, Business Capability Modeling, and ITIL. Establishment and evolution of enterprise architecture governance frameworks ensuring solution alignment and standardization.
Security & Identity ArchitectureDesign and enforcement of security architectures using Keycloak (CIAM), OAuth2, OpenID Connect (OIDC), and Role-Based Access Control. Integration of centralized Customer Identity and Access Management solutions across distributed platforms.
SAP S/4HANA & ERP PlatformsExperience as integration-focused Solution Architect for SAP R/3 to SAP S/4HANA migrations, assessing integration touchpoints, defining integration standards and patterns, and ensuring interoperability alignment with enterprise architecture principles. Experience with Appian BPMs and AS400.
Data & Messaging TechnologiesArchitecture of event-driven solutions using Apache Kafka for real-time data processing and asynchronous communication. Experience with Elasticsearch, PostgreSQL, MongoDB, SQL Server, and Redis for data layers.
Pre-Sales & ConsultingLeadership of end-to-end techno-economic analyses, development of solution proposals and executive presentations, business case development, vendor evaluation, and client needs assessment. Ability to present findings and recommendations to C-level stakeholders.
Technical Leadership & Team ManagementLeadership of cross-functional development and architecture teams of up to 8 members in Agile/Scrum environments. Provision of mentorship, architectural direction, code quality oversight, and end-to-end project delivery management.
Languages & FrameworksDevelopment experience with Java, JavaEE, Spring Boot, Apache Camel, Angular, HTML5, and CSS. Full-stack solution design across backend, frontend, and data layers using Maven and Git.
Experience
Professional experience10+ years
Freelancer since2023
Languages
EnglishFluentGreekNative speaker
Project history
Serving as Enterprise & Solution Architect for one of Southeast Europe's largest energy groups, driving modernization of the technology landscape and ensuring all architectures align with the group's long-term strategic vision. Responsibilities include establishing enterprise architecture governance frameworks applying TOGAF principles, serving as integration-focused Solution Architect for SAP R/3 to SAP S/4HANA migration, assessing AI platform solutions for integration within the PPC Group ecosystem, leading techno-economic analyses for CIAM platform vendor selection, identifying technical and business risks during the Enel-to-PPC Romania transition, collaborating with C-level stakeholders to translate business strategy into technology roadmaps, and providing strategic direction to vendors and implementation partners.
Led architecture and delivery for a large-scale EU institutional client within a global technology services organization, managing the full solution lifecycle from concept through deployment across multiple technology domains. Designed a scalable, high-performance microservices-based system delivering a 30% improvement in system performance and scalability. Architected an event-driven backbone using Apache Kafka. Led an 8-person development and architecture team in an Agile/Scrum environment. Defined and implemented a containerization strategy using Docker. Led architectural discussions and workshops with key business and IT stakeholders.
Drove the architectural transformation of legacy systems into modern, scalable platforms for a global IT services provider operating across 190+ countries. Led the transformation of a monolithic system into a microservices architecture (~20 services) based on Enterprise Integration Patterns. Architected an event-driven solution leveraging Apache Kafka with MongoDB as the high-performance data layer. Designed and enforced security architecture integrating Keycloak for centralized CIAM applying OAuth2 and OpenID Connect standards. Directed a team of 5 developers providing mentorship and architectural direction.