Senior Go Protocol Engineer

Responsibilities

• Design, build, and review Cosmos SDK modules for staking, fee model, rewards, validator rules and governance
• Write state migrations and upgrade handlers that are deterministic, tested and rehearsed on testnet
• Keep chain modules current with upstream Cosmos SDK, CometBFT and IBC-Go releases
• Own IBC paths end to end, including channels, transfers, light clients and relayer operation
• Build and maintain Go developer tooling such as CLIs, Protobuf/gRPC generation and scaffolding
• Run testnet nodes, validators and Kubernetes deployments with Prometheus/Grafana monitoring

Requirements

• Public Go code merged into a blockchain protocol repository
• 5+ years of production Go, including concurrency and performance debugging
• Cosmos SDK module work shipped on a public network
• Hands-on IBC experience: transfers, channels, light clients or relayers
• Developer tooling other engineers depend on
• Linux, Docker, Kubernetes, CI pipelines and node operations

Preferred Qualifications

• Maintainer or top-contributor status on a public blockchain repository
• EVM experience alongside Cosmos, including Solidity contracts or ABI bindings
• Ethereum Layer 2 or zk-rollup engineering
• Wallet, custody or signing infrastructure experience
• CosmWasm or Rust experience

Benefits

• Equity in Launch Legends and Autheo, plus a THEO token allocation
• Remote, part-time cofounder role with no cash salary, at least 20 hours per week

About the Company

Launch Legends bridges Web3 blockchain technology with Web2 integration through enterprise solutions and DePIN infrastructure. Its flagship project, Autheo, is an AI-enabled Layer-0 operating system with an integrated Layer-1 blockchain.