Senior Backend Engineer · Full-Stack
C#/.NET · TypeScript/Node.js · AI/LLM Integration
I build backend systems in ASP.NET Core and Node.js and ship LLM features on top of them.
11 years in software, a decade of it in C# and .NET · Berlin, Germany
Open to senior backend, full-stack and AI-integration roles across Germany: on-site, hybrid or remote · authorized to work in Germany, available immediately
DevSpace · A Windows app for developers who juggle several projects a day: each project keeps its own tools (one click each, reusable as templates), credentials and a built-in visual Git client, so switching takes a click instead of a setup ritual. It finds 100+ installed tools in under 3 seconds and encrypts each project's credentials with the ASP.NET Core Data Protection API. In public preview.
.NET 9 ASP.NET Core Electron React 18 TypeScript Git
Keyra · A small, offline password vault for Windows: everything lives in one encrypted file on your own PC (Argon2id + AES-256-GCM, header authenticated), with no account, no cloud and no network code. Opt-in Windows Hello unlock, a self-clearing clipboard, and a written threat model of 26 threats that says what it cannot protect against. Designed by me, coded with Claude Code under security rules it must follow. Free for personal use (releases).
.NET 10 WPF C# Argon2id AES-256-GCM Claude Code
SpireWiz · Co-engineered at Optimizely: an upgrade-automation tool for Configured Commerce. A three-way merge resolves conflicts first; the OpenAI APIs settle only what the merge cannot, for a developer to review. Up to 80% shorter upgrade cycles across 25+ enterprise clients.
Python OpenAI Platform APIs git three-way merge
@strix-ai/currentdt-mcp · A co-authored open-source MCP server that gives AI assistants like Cursor, Claude and VS Code real-time date and time. Published to npm; listed on the LobeHub and MSeep MCP registries.
TypeScript Node.js MCP
HyperCache · An open-source reference implementation of SQL Server change-tracking (Delta) caching: repeat queries on a 1M-row table drop from ~3.6 s to single-digit milliseconds.
.NET 9 EF Core 9 SQL Server Blazor
| Work | Before | After |
|---|---|---|
| Reganalytics: legacy platform → ASP.NET Core microservices | ~2.5 s API responses | ~280 ms (~9x faster) |
| Robi: 40+ .NET services on 9+ Linux servers | 6–8 hour deployments | under 1 hour |
| SpireWiz: Configured Commerce upgrades | manual three-way merges | up to 80% shorter, an estimated 600+ developer hours saved a year, ~$180K projected annual value |
| Backend | C# · .NET · ASP.NET Core · EF Core · Node.js · REST APIs |
| AI & LLM | OpenAI Platform APIs · Google Gemini · MCP · RAG · Claude Code · Cursor · GitHub Copilot |
| Frontend | React · Angular · TypeScript · Next.js · Redux · Tailwind CSS |
| Cloud & DevOps | Azure · AWS (Lambda, DynamoDB, S3) · Docker · GitHub Actions · Azure DevOps |
| Data | SQL Server · PostgreSQL · MongoDB · Redis · Elasticsearch |
| Architecture | Microservices · Clean Architecture · Serverless |
- Microsoft Certified: Azure Fundamentals · verify
- Optimizely Opal Tools Certified 2025 · verify
- Optimizely Opal Certified Administrator 2025 · verify
BugBusters: Clean Architecture Q&A platform, .NET 7 + React 18 · EmailEngine: Outlook → Elasticsearch sync via Microsoft Graph webhooks · ProtoCore.NET: code-first gRPC boilerplate for .NET 7