I've been in crypto since 2013 and writing code since childhood. These days I focus on the intersection of the two: building systems that operate reliably in the fast, adversarial environment of live financial markets.
By day I'm the sole engineer behind a business-critical logistics platform (Node.js, event-driven, Docker/Kubernetes) serving 200+ daily users at a fast-growing transport company, covering backend, frontend, infrastructure, and integrations end to end. By night I build low-latency market infrastructure in Rust: async WebSocket clients, real-time order book management, and algorithmic detection of trading opportunities.
I care about correctness first (checksums, precise decimal arithmetic, and explicit error handling over convenient shortcuts) and performance second.
Real-time triangular arbitrage detection over Kraken's WebSocket v2 API, built in async Rust with Tokio.
- Maintains live order books for multiple trading pairs, validated against Kraken's CRC32 checksums, with automatic resync on checksum failure
- Depth-aware, VWAP-based book walking to model price impact and liquidity constraints instead of naive best bid/ask
- Resilient connection handling: automatic reconnection with backoff, ping/pong monitoring, graceful shutdown across all tasks
- Live terminal UI (ratatui) with spread display and opportunity tracking
Next up: extracting the WebSocket and order book layer into a standalone, publishable crate.
Over a decade of building across fintech and web3: front- and backend work on a European centralized exchange, smart contracts and full-stack development at a DeFi options protocol, data-driven ecosystem analysis at a major web3 gaming company, and more trading bots and market tools than I can count. I was one of the first to reverse-engineer the CryptoKitties genome.
That history means I understand how exchanges behave under stress, why precision matters in financial arithmetic, and what separates a system that works in testing from one that holds up on mainnet.
I'm not here for the trading. I believe economic freedom is a fundamental issue: people should have sovereignty over their own money without depending on institutions that may not have their interests at heart. Decentralisation isn't just a technical property to me, it's the point. That conviction is what drew me into this space a decade ago, and it pushes me to build these systems properly.
Languages: Rust 路 Python 路 Go 路 JavaScript/TypeScript 路 Solidity
Domain: Crypto markets 路 Exchange infrastructure 路 WebSocket protocols 路 Order book mechanics 路 Event-driven systems
Interests: Decentralisation 路 Financial systems 路 Protocol design 路 Open source
I'm based in the Netherlands. You can find me as @zimmah on most platforms, and on-chain as zimmah.eth.
Always interested in roles and collaborations at the intersection of systems engineering and crypto infrastructure.