Hi, I'm Paul Ziegemann

Offline-first, decentralized medical incident-command software built as a fault-tolerant thick client.

• Decentralized Event Sourcing (DAG)

  Every action is recorded as an immutable event in a local directed acyclic graph, keeping a cryptographically linked, tamper-proof history.

• Deterministic Offline Conflict Resolution

  Parallel offline actions are resolved deterministically (LWW / Add-Wins); professional clarification stays with personnel and is documented in the audit log.

• GDPR via Crypto-Shredding

  Patient PII is encrypted per-event. Deletion is achieved by destroying the key, keeping the DAG intact while rendering personal data unreadable.

• Rust
• Tauri v2
• Event Sourcing
• DAG
• CRDTs
• mTLS

Master's thesis on decentralized, distributed architectures for large-scale operations.

• Decentralized, Distributed Architecture

  Explores coordination and consistency across nodes without relying on a single central authority.

• Resilience for Large-Scale Operations

  Designed for scenarios where reliability under extreme conditions matters more than feature breadth.

• Kotlin
• Spring Boot
• Electron
• Redux
• WebSocket
• Distributed Systems
• Consistency
• Resilience

AI-powered news analysis that scrapes real articles, detects sentiment & framing, and surfaces related coverage via vector search.

• Automated Scraping Pipeline

  Scheduled collection of real articles from configured sources using the Oxylabs Web Scraper API, with link extraction, cleanup, and validation layers.

• Structured AI Analysis

  Articles are analyzed with GLM via the Vercel AI SDK, producing validated sentiment and framing insights (Zod-typed output).

• Semantic Similarity with pgvector

  Each article is embedded and stored, enabling pgvector similarity search to surface related coverage across sources.

• Next.js
• TypeScript
• Vercel AI SDK
• Supabase
• pgvector
• Oxylabs
• Clerk

Internship, working student & thesis — full-stack real-time systems, DevOps, and IoT across multi-year engagement.

• Full-Stack & Real-Time Systems

  End-to-end implementation of the cross-platform dispatch software »Mission Control Paramedic« (Electron, React, Kotlin, Spring Boot). Real-time features via WebSockets and Redux-Saga, with multi-year live operation at large events (e.g. »Das Fest«) by the DRK and in the security sector.

• DevOps & CI/CD

  Automation of test, build, and deployment pipelines via GitLab.

• IoT & Telemetry

  Development of a LoRaWAN tracking application (Go, Docker, InfluxDB, Grafana), including a talk at Building IoT 2024.

• Electron
• React
• Kotlin
• Spring Boot
• WebSockets
• Redux-Saga
• Go
• Docker
• InfluxDB
• Grafana
• GitLab CI/CD