Description

Meet Tomás, one of the lead maintainers of Ethrex, a minimalist Ethereum execution layer (EL) client written in Rust.

Before working in crypto, Tomás was a software engineer working on projects related to robotics, tourism, and video games. 

A few years into his career, Tomás joined a boutique software company called Lambda Class, where he and his peers won contracts and received grants to build software for public blockchains such as Starknet and Ethereum. 

Through these projects, Tomás and his team at Lambda Class became more invested in the development of Ethereum and eventually in the creation of Ethrex, a new, Rust-based execution-layer client built primarily for Layer 2 protocols. 

In this interview, Tomás shares his journey to becoming a full-time Ethereum developer and his views on the future of Ethereum development. 

This interview was recorded on April 10, 2026.

Timestamps:

(2:02) Tomás’s biggest contribution to Ethereum

(4:00) How Tomás got into crypto

(6:29) Why Lambda Class decided to build Ethrex

(13:48) How Ethrex differs from other Ethereum clients

(22:11) Tomás’s view on the main development priorities of Ethereum

(36:03) Ethereum upgrade timeline expectations

(45:36) Rapid-fire questions round 

Links: 

- Tomás Arjovsky

X: https://x.com/TArjovsky

GitHub: https://github.com/Arkenan

- Lambda Class

Official Website: https://lambdaclass.com/

- Ethrex

Official repository: https://github.com/lambdaclass/ethrex

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