Senior .NET Back-End Engineer from Timișoara, Romania — 10 years of building back-end systems for banking, fintech and industrial clients.
- 🔭 Currently: independent contractor — building a factory-flow management platform for a German industrial manufacturer: .NET 8 microservices, Kubernetes/Helm, Azure Service Bus, OpenTelemetry
- 🧑🏫 On the side: trained career-changers in JavaScript & React at IT School
- 🌱 Now exploring: contributing to the .NET open-source ecosystem
- 🌐 Portfolio: rosian22.github.io
- 📫 Reach me: LinkedIn
C# .NET 8 ASP.NET Core Entity Framework SQL Server Elasticsearch Redis Kafka RabbitMQ Azure Service Bus OAuth 2.0 / OpenID Connect Docker Kubernetes OpenShift Helm Azure DevOps OpenTelemetry xUnit TypeScript React Next.js
Personal / open source
- MeshChat — off-grid, end-to-end encrypted chat over a Bluetooth + local-network mesh: ECDH + AES-GCM encryption, multi-hop relay routing, mDNS discovery. .NET MAUI · C#.
- Sakana Sushi — full-stack sushi ordering app: menu, cart, guest & JWT-authenticated checkout, live order tracking, admin panel, pluggable payment providers. React 18 · ASP.NET Core 8 · MongoDB · Docker Compose.
- TCG Ranking Tracker — ranking & statistics tracker for the One Piece trading card game. Next.js · TypeScript.
Professional work (closed source — happy to talk about any of these)
- Factory-flow management platform (2026–present) — .NET 8 microservices platform for a German industrial manufacturer: shop-floor terminal + flow-configuration front-ends, OAuth 2.0/OIDC-secured REST APIs, Azure Service Bus integrations, Kubernetes/Helm, OpenTelemetry.
- Corporate banking platform (2022–2025) — high-availability multi-service system optimising financial transactions between corporate clients and a bank: monolith-to-microservices migration, Kafka & RabbitMQ event-driven messaging, OpenShift, Azure AD / Entra ID.
- Cryptocurrency trading platform (2019–2021) — sole developer of a public-facing trading web app: .NET Core REST APIs, Redis, Elasticsearch, OAuth 2.0, payment-gateway integrations (Klarna, Interac, Payset).
- Print-shop CRM (2021–2022) — full-stack client-management and sales-tracking system for print shops: .NET 5 REST APIs, Angular 8, SQL Server, Azure.