Senior Software Engineer JB-4644

About the Company: We are developing a new block builder to democratize and counter centralization in the Ethereum

ecosystem. Our block builder augments the capabilities of the Ethereum network and enables new

Defi primitives.

About the Role:

We're seeking an experienced Ethereum backend developer proficient in deep blockchain protocols

and Rust to join our team. In this role, you will:

● Design high-performance systems optimized for low latency and scalability, with direct

impact on the mainnet, contributing to a fairer and more efficient Ethereum network.

● Design and develop scalable backend services in Rust, focusing on ultra‑low latency and

high throughput for Ethereum payload submission and block construction.

● Architect and implement builder-relay payload protocols (e.g. MEV‑Boost), enabling in‑slot

timing optimization, censorship‑resistance, and ultra‑parallelized block generation.

● Optimize system performance through advanced Rust practices and low‑level orchestration.

● Influence critical protocol decisions and drive measurable mainnet improvements through

your expertise.

Qualifications:

● Strong understanding of Ethereum protocols, including PBS/MEV‑Boost flows, fork‑choice

logic, slot/epoch timing, and relay security.

● Expertise in Rust (async, zero‑cost abstractions, performance tuning); familiarity with Go or

C++ is a plus.

● Proficiency in Python for simulation, data analysis, and tooling.

● 10+ years of experience, at least 2 years in building on top of off-chain protocols.

● Experience with revM, reth/geth internals, or similar blockchain development tools.

Preferred Qualifications:

● Prior contributions to core Ethereum clients, EIPs, or open‑source MEV tooling.

● Hands‑on with Kubernetes, Docker, and bare‑metal performance tuning.