Munich, Germany · Staff Engineer @ NVIDIA
12+ years engineering large-scale enterprise collaboration — from Avaya dial-tone to AI-assisted global video estates. I keep ~1600 conference rooms across the planet running at 99.9%+ uptime, and build the tools that make it possible.
I'm a Senior Unified Communications engineer who has evolved from a core telecom & VoIP background into an AI-powered UCC architect — bridging legacy collaboration infrastructure with modern, automated, cloud-native platforms.
At NVIDIA I manage a global estate of video conferencing devices, act as Tier-3 SME for Microsoft Teams Rooms, Pexip CVI and multi-vendor AV, and build internal platforms with React, Databricks and Python — including LLM/RAG-assisted log analysis that cuts troubleshooting from hours to minutes.
A browser game that teaches SIP to the level where you can read a trace from a broken production call and name the failing header. 37 levels across 8 acts — transactions and timers, dialogs and routing, offer/answer, forking proxies, NATs, B2BUAs, digest auth — on an engine I wrote from the octets up: scanner and parser, both transaction state machines, every §17 timer, a virtual clock and a simulated lossy network.
Nothing is scripted. A level is a network topology plus a goal predicate evaluated against the event log the engine actually produced, so any answer the RFCs permit passes and none they forbid does — there is no answer key to match. Adversary Mode hands you a working call and a budget to break it, and scores the attack void if it only succeeded because the defender itself went non-conformant. CI plays every level with a reference solution, and plays a wrong answer at the hard ones to prove the level can still be failed.
⚡ Static host — no cold start. The whole engine runs in your browser; nothing you type is sent anywhere.
Moves configuration, identity and telephony state between on-prem UC estates (Cisco CUCM · Avaya Aura · Skype for Business) and cloud platforms (Teams Phone · Slack · Genesys Cloud) — in both directions, against one versioned canonical model rather than N×M point-to-point migrators. Discovery, an 18-rule assessment engine, number normalisation, dependency-aware wave planning, resumable runs with rollback, and a hash-chained audit log.
The interesting part is what it refuses to do. Production writes need a dry-run receipt matching the plan's digest, two distinct approvers, an open change window and per-site emergency-calling confirmation — and no connector whose API surface is unverified may write at all. Every guardrail is enforced in the library with a test asserting the refusal.
⏳ Free-tier host — first request may take ~30 s to wake the server. Every connector runs against recorded cassettes: no vendor credentials, no network.
A management console for unified-communications deployments: projects, the devices deployed under them (Poly · Cisco Webex · Microsoft Teams Rooms) and the phone numbers assigned across them — with connector health, analytics, an audit log, and a 3D dashboard hero.
⏳ Free-tier host — first request may take ~30 s to wake the server.
A real-time communications platform built from the wire protocol up: WhatsApp-style chat (✓/✓✓/blue-✓✓ receipts, typing, presence, offline sync, message search, push notifications, WebRTC calls) plus an MTR-style meeting-room kiosk mode — one gateway, one protocol, two personalities. Installable PWA; ports-and-adapters backend that runs embedded (zero Docker) or on Postgres/Redis/S3 with a single env var.
🔒 Invite-gated demo (ask me for the access code) · free-tier host, ~30 s cold start.
Architected and built from the ground up with a DevOps-centric approach — automated CI/CD pipelines deployed on Kubernetes for high availability and scale.
LLM & RAG integrations into enterprise video-conferencing ecosystems — automated log analysis, device troubleshooting and intelligent issue resolution.
A hand-rolled single-page site with a real-time Three.js particle field, scroll-driven reveals and 3D-tilt interactions. No frameworks, no build step.
Open to Senior UC / Collaboration / M365 / IT-Operations conversations — or anything at the intersection of enterprise infrastructure and AI.