Senior Protocol Engineer — Blockchain Infrastructure (Remote)

Sei Labs; California (MO); On-site; USD 120,000 - 180,000; Full time

Job summary

Sei Labs is hiring an experienced infrastructure engineer to help build and optimize the Sei blockchain core, including consensus and state management. You will work closely with frontend teams to tune the REST API and support customers.

You should have 5+ years in infrastructure engineering, proven leadership on large-scale projects, and a track record of delivering high-performance systems. This is a fully remote role with global collaboration.

Qualifications

• 5+ years of infrastructure engineering experience.
• Proven results in building or scaling Layer 1 blockchain performance.
• A proven tech lead with experience planning and leading large projects with long‑term impact on a single system or team.
• Strong technical grasp and excellent judgment on task prioritizations.
• Able to tackle complex engineering problems that deliver results.

Responsibilities

• Write code to build the core Sei blockchain components (consensus, state management, etc.).
• Proactively identify and drive optimizations and improvements to the product.
• Collaborate with the frontend team to fine tune the REST API to support customers.
• Take ownership over your work and the work of the team.

Skills

Infrastructure engineering

Tech lead

Blockchain performance

REST API tuning

Project planning

Tools

REST API

Job description

Sei Labs is hiring an experienced infrastructure engineer to help build and optimize the Sei blockchain core, including consensus and state management. You will work closely with frontend teams to tune the REST API and support customers.

You should have 5+ years in infrastructure engineering, proven leadership on large-scale projects, and a track record of delivering high-performance systems. This is a fully remote role with global collaboration.