Serotonin is hiring a

Web3 Senior Distributed Systems Engineer - Golang (External)

Our clients mission is to commoditize all forms of intelligence. Operating at the intelligence layer of the AI stack, they believe that building at the intersection of crypto and AI is the optimal path to achieving their mission.

As crypto-natives and ML experts with experience across leading Web3 projects, large finance companies, and large tech companies, the team combines deep blockchain knowledge with world-class technical capabilities. Backed by top crypto venture funds and angel investors who share the vision for the future of digital ownership.

We are looking for a Senior Distributed Systems Engineer to join the growing team responsible for the design, implementation, and optimization of large-scale, distributed infrastructure that powers the network. This role will focus on building robust, high-performance backend systems, optimizing peer-to-peer networking layers, improving system scalability, and ensuring fault tolerance in adversarial environments. You will join a flat, collaborative environment that emphasizes solving hard problems with precision and speed.

Key Responsibilities:

• Design, build, and maintain backend services using Go, navigating the full lifecycle from ideation to production.
• Collaborate with multiple squads to deliver new features and drive product velocity.
• Write reliable, well-tested code that scales under high-demand environments.
• Improve the software development lifecycle through effective technical design, lean iteration, and thorough documentation.
• Mentor and support peers, contributing to a culture of engineering excellence

Key Requirements:

• 3+ years developing infrastructure in adversarial, peer-to-peer environments (e.g., blockchain nodes).
• 5+ years of development experience in Go (required), JavaScript/Node, TypeScript, Python, or Rust.
• 5+ years with both SQL and NoSQL systems.
• Strong background in Web3, crypto, DeFi, and AI technologies.
• Demonstrated experience building public-facing APIs handling high throughput (≥10⁴ requests per day).
• Excelling in fast-paced startup environments, with strong problem-solving and cross-team collaboration skills

Preferred Requirements:

• Experience with open-source tooling or contributions to developer communities.
• Familiarity with the Cosmos SDK or similar protocol frameworks.
• Background in AI/ML, statistics, or algorithm design.
• Understanding of Solidity and smart contract development.
• Exposure to Kafka or other streaming platforms.
• Hands-on experience with production-grade smart contracts