Full-stack engineer · Web3 · Blockchain · AI
I build decentralized and AI-powered products end to end — smart contracts, backends, and the interfaces on top. Much of my Web3 work started at hackathons, where projects I helped build won prizes from the Ethereum Foundation, ENS, The Graph, Optimism and others.
| Project | What it is | Recognition |
|---|---|---|
| zkPaymaster | Zero-knowledge account-abstraction paymaster enabling private sponsorship of transaction fees | 🥇 Ethereum Foundation — Best ERC-4337 · Sismo Top 5 · Biconomy Best Use · MakerDAO 2nd (sDAI) — ETHGlobal Paris |
| Peer'n Pay | Peer-to-peer protocol meets Ethereum payments | ENS Integration Prize · Push Protocol Top 20 — ETHGlobal HackFS |
| Turtleshell | Brings smart-contract security data on-chain — transparent, composable, programmable | The Graph — Best use of Subgraphs · Taiko · Mantle · Scroll — EthPrague |
| Caffeine Consensus | Account abstraction + X.509 PKI for gasless enterprise/government transactions | 2nd place & Judges' favourite — EthZurich |
| SPN DAO | Data DAO giving consumers ownership of their transaction data (FEVM / Filecoin) | Runner-up, Best use case — ETHGlobal FEVM |
More hackathon projects
- Turtleshell — on-chain contract-security data · Optimism & The Graph prizes, ETHGlobal Lisbon
- StealthSend — transactional privacy on L2s via stealth addresses (ERC-5564 / ERC-6538) · EthDam
- Grayskull Guardians — solo-staking protocol with sybil resistance and MEV smoothing · ETHGlobal Istanbul
- Sharknado — anonymous surveys via zero-knowledge proofs · EthRome
- Deadcaster — decentralized, secure dead-man's switch · EthBerlin
- Calimocho — Ethereum Attestation Service helping DAOs standardize digital trust · Nearcon Lisbon
- EtherGuild — a community to fund Ethereum-based projects · ETHGlobal Agentic Ethereum
- Embrace Community — community/DAO dapp grown out of EthLisbon
- GroundOne — NEAR MetaBUILD III
- taggr — self-hosted, privacy-first image tagging: bulk auto-tagging with a local LLM (Ollama); every image and label stays on your own machine.
- kAIros — AI-guided goal-tracking mobile app: frame a goal through conversation, break it into steps, stay on track with reminders and nudges.
- finanzplanr — financial planning for the DACH region: household budgeting with AI-powered bank-statement parsing, on web and mobile from one backend.
Web & mobile
Blockchain
AI
Infra
I also run Leinss Consulting — generative-AI solutions for the German Mittelstand.
📚 Learning & reference repositories
Blockchain · Solidity · Udacity Blockchain Developer · Encode Solidity Bootcamp · ZK Bootcamp · Near · Solana · Aptos / Move · Polkadot / Substrate
AI & ML · DeepLearning.ai · Machine Learning (Stanford) · Full Stack Deep Learning · Udacity Data Engineering · Udacity Deep RL · Udacity AI
Foundations · Algorithms & Data Structures · System Design Primer · Docker & Kubernetes · Rust