Technical architect for a Cardano-anchored publish/subscribe layer: identifiable publishers, verifiable events, and on-chain registered topics. Led a team through formal verification of the SecureCyclon peer-sampling protocol stack and built the working prototype.

Principal author of CIP-0164, the canonical architecture design document for Cardano's high-throughput protocol. Built interactive web-based simulator and documentation site with formal specification rendered via custom agda-web-docs-lib.

Interactive mempool visualization tool for the Leios protocol. Explores front-running opportunities and attack vectors to build educational resources for community understanding of protocol security.

Authored the event-driven re-architecture behind Lace, Cardano's light wallet: CQRS and event sourcing for indexing the chain and serving wallets, replacing a poll-based backend with a push model. 45% lower latency, 60%+ infrastructure savings, and a custom indexer using bloom filters and credential-based indexing that ingests 2,000+ tx/s for sub-second sync. The design is published as a CIP and a problem statement, so the reasoning is readable rather than asserted.

A social network for Berlin's beach volleyball scene: players find coaches, sessions and each other across the city's sand courts. Ein soziales Netzwerk für Berlins Beachvolleyball-Szene: Spieler finden Trainer, Trainings und einander auf den Sandplätzen der Stadt.

Screening tool for German residential investment listings. Leads with monthly cashflow before tax, keeps after-tax estimates separate, and calculates the equity needed to reach positive cashflow plus cash-on-cash return. Paste a listing link and the figures get extracted for you. Every tax and financing assumption stays visible and editable.

Voice-native cross-platform app built on Supabase (PostgreSQL) with AI-powered intent classification, semantic search, and end-to-end encryption. Features Row Level Security, Edge Functions, real-time sync, Event Sourcing architecture, and vector embeddings.

Production NFT marketplace on Cardano with smart contract integration for trading, bidding, and swapping. Implemented wallet standards and event-driven sync patterns later adopted by IOG.

Production Cardano consensus node infrastructure. Operated 2,000+ blocks with 99.9% uptime and managed 15M+ ADA delegation.

Berlin-based freelance agency specializing in Supabase and PostgreSQL backends, web/mobile apps, and AI automation.

Deal-sourcing pipeline for Operando Partners. M&A advisors email deal teasers; the pipeline reads the inbox, pulls the key figures out of the PDF teasers with Claude and drafts a HubSpot lead the team reviews before anything is saved. Email content is treated as untrusted data and never followed as instructions. Deal-Sourcing-Pipeline für Operando Partners. M&A-Berater schicken Deal-Teaser per E-Mail; die Pipeline liest das Postfach, zieht mit Claude die Kennzahlen aus den PDF-Teasern und legt einen HubSpot-Lead an, den das Team vor dem Speichern prüft. E-Mail-Inhalte gelten als nicht vertrauenswürdig und werden nie als Anweisung befolgt.

Portfolio and booking site for a Berlin model, built through Pagebase. Image-heavy layout tuned for fast loads on mobile, bilingual copy, and a contact flow that goes straight to the inbox.

Portfolio and enquiry site for a Berlin UGC creator and commercial model working with DACH brands, built through Pagebase on the shared component kit. Bilingual with locale routing, selected-work galleries and a services and rate section.

Modern website and booking system for a dive center in Cyprus. Mobile-first design with focus on user experience and easy booking management.

Lead frontend developer for TokenRiot's Cardano NFT marketplace from 2022 to 2024, writing roughly 80% of the frontend alongside three other contributors. Next.js and Redux Toolkit client with CIP-30 wallet connection through cardano-serialization-lib and Lucid, CBOR transaction construction, a cached API layer and full internationalisation, built against the platform, chain indexer and smart contract services.

Extended Dolos chain indexer to support DEX script addresses for Lace wallet's swap feature. Custom fork enabling efficient DEX data retrieval and aggregation.

Extended Cardano indexing tool for smart contracts across major DEXes (SundaeSwap, Minswap, WingRiders, MuesliSwap). Comprehensive DeFi data aggregation.

Extended Cardano transaction library with UTXO chaining capability for complex multi-transaction workflows and atomic operation sequences.

Published npm package for swap transaction construction across multiple Cardano DEXes. Foundation for Lace wallet's swap feature.

Educational blockchain implementation from scratch. Built proof-of-work consensus, block validation, and peer-to-peer networking.