Preston Van Loon

Developed and maintained the Prysm validator client and associated tooling that became one of the dominant software stacks used by large-scale validators and custodial staking providers. These concrete engineering deliverables enabled exchanges to operate validator fleets at scale, perform deposits to the official deposit contract and manage validator keys and metrics required to back tradable staking receipts like BETH. Contributed bug fixes, performance optimizations and operational documentation that reduced downtime and slashing risk for operator‑run validators. The operational reliability and feature set of Prysm influenced how custodial providers sized their validator pools, determined fee pass‑through mechanisms for rewards, and structured hot/cold key management — all practical inputs into how BETH was issued and backed. Interacted with other client teams and the wider Ethereum community to support testnet runs and mainnet readiness, creating verifiable evidence that particular client behaviours and compatibility assumptions could be relied upon by institutional stakers. Those engineering outcomes materially affected the feasibility and cost profile of exchange‑run staking, which underpins the issuance model for exchange tokens such as BETH.