Senior Blockchain Developer

Responsibilities

• Design, build, and review Cosmos SDK modules, node components, and smart contracts
• Write deterministic state migrations and upgrade handlers rehearsed on testnet
• Own IBC and bridge paths end to end, including relayer operation
• Build and maintain developer tooling such as CLIs, SDKs, and DevHub examples
• Run unit, simulation, and end-to-end tests and CI for every change
• Operate testnet nodes, validators, Kubernetes deployments, and monitoring

Requirements

• Public blockchain code in Go, Rust, or Solidity with a linked repository
• 5+ years of production software engineering with substantial blockchain work
• Hands-on work in Cosmos SDK, EVM/Solidity, IBC/bridges, or node operations
• Linux, Docker, Kubernetes, CI pipelines, and Prometheus/Grafana experience

Preferred Qualifications

• Experience across more than one of Go, Rust, and Solidity
• IBC relayer operation (Hermes, Go relayer) or bridge engineering
• Wallet, custody, or signing infrastructure experience
• Developer tooling used by other engineers
• Teaching, talks, or workshops on blockchain engineering

Benefits

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

About the Company

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