Vasilis Xenos — Software Engineer

// 01 — Tech Stack

Technologies & Tools

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Backend

Core platform

.NET 10 ASP.NET Core C# Entity Framework Core CQRS OpenIddict REST APIs MediatR

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Frontend

UI & interaction

React TypeScript React Query React Hook Form Material UI Zod ESLint

[ ]

Mobile

Cross-platform

.NET MAUI iOS Android Biometric Auth Push Notifications Camera API

Databases

Data layer

PostgreSQL Oracle SQL Server EF Migrations Audit Trails

Cloud & DevOps

Infrastructure

Azure Docker Azure Notification Hubs CI/CD Git Linux

Auth & Security

Identity management

OpenIddict OAuth 2.0 RBAC Biometric Auth JWT

Legacy Migration

Modernization

.NET Framework → .NET Core Legacy App Support API Refactoring Incremental Upgrades

Windows & Hosting

Desktop & deployment

Windows Forms IIS Docker Web Deploy App Pools Windows Services

// 02 — Projects

Products I've Built

Enterprise Web Platform

Enterprise SaaS Platform

Large-scale business management platform with multi-tenant architecture, complex domain logic, role-based access, and regulatory compliance workflows.

ASP.NET Core React PostgreSQL OpenIddict CQRS

Production

Cross-Platform Mobile

Mobile Companion App

Cross-platform mobile app with biometric login, push notifications, camera integration, and offline-first capabilities for iOS and Android.

.NET MAUI Azure Push Notifications Biometrics

Production

Tablet Application

Training & Assessment App

Tablet-optimized training application for guided learning, assessments, and progress tracking with an interactive touch-friendly interface.

.NET MAUI Tablet UI Offline Support

Production

Desktop Applications

Internal Business Suite

Suite of desktop applications for internal operations, record keeping, reporting, and workflow automation across departments.

Windows Forms .NET Framework SQL Server Oracle Crystal Reports

Production

Web Application

Internal CRM System

Relationship management platform for tracking contacts, interactions, and activity history with rich filtering and reporting.

.NET React Material UI Entity Framework

Active

// 03 — Experience

Career Path

Present

Software Engineer

Athens, Greece

Developing and maintaining multiple enterprise applications, cross-platform mobile apps, and business tools. Architecting full-stack solutions with .NET Core backends, React frontends, and mobile applications. Managing identity systems, complex database operations, legacy modernization, and cloud deployments.

Earlier

Software Developer

Previous Roles

Built foundational experience across the .NET ecosystem, enterprise application development, database design, and modern web technologies. Developed expertise in business logic implementation, reporting systems, and data migration tooling.