Rust Runtime & Developer Tooling Engineer

Launch Legends; United States; Remote; USD 120,000 - 160,000; Full time

Job summary

Launch Legends is hiring to design and ship deterministic WASM-compatible runtime modules and a Rust contract SDK ecosystem. You will integrate the toolchain into DevHub, create templates and sample contracts, and collaborate with DevRel on documentation and examples.

The role emphasizes cross-compilation, edgy software design, and contributing to a scalable on-chain development stack with emphasis on performance benchmarks and secure interfaces.

Qualifications

• Public Rust code linked from a GitHub/GitLab profile, crates.io or merged PRs.
• Production Rust knowledge: ownership, lifetimes, macros, traits, async.
• Experience inside a VM, interpreter, runtime or compiler.
• Published or maintained a library, SDK or CLI used by other developers.

Responsibilities

• Design and ship deterministic WASM-compatible runtime modules with host functions and gas metering.
• Build a Rust contract SDK, cargo-level CLI and client SDKs.
• Wire the toolchain into DevHub with templates, examples and versioned releases.
• Work with DevRel on docs and sample contracts.
• Add CI benchmarks for execution hot paths and fuzz the host interface and contract ABI.

Skills

Public Rust code

Rust production skills

VM/Runtime experience

Cross-compilation CI

Tools

ink!/cargo-contract

CosmWasm

wasmtime

wasmer

Job description

Responsibilities

• Design and ship deterministic WASM-compatible runtime modules with host functions and gas metering
• Build a Rust contract SDK, cargo-level CLI and client SDKs
• Wire the toolchain into DevHub with templates, examples and versioned releases
• Work with DevRel on docs and sample contracts
• Add CI benchmarks for execution hot paths and fuzz the host interface and contract ABI

Requirements

• Public Rust code you wrote, linked from a GitHub/GitLab profile, crates.io or merged PRs
• Production Rust: ownership, lifetimes, macros, traits, async
• Experience inside a VM, interpreter, runtime or compiler
• Published or maintained a library, SDK or CLI used by other developers
• Cross-compilation (wasm32, aarch64) and CI pipelines that build, test and release Rust

Preferred Qualifications

• Contributions to ink!/cargo-contract, CosmWasm, wasmtime, wasmer, revm, Stylus, Anchor, Sway or Move
• Gas metering, deterministic execution or sandboxing design
• TypeScript SDK experience or adopted API design
• A public crate, talk, blog post or design doc

About the Company

Launch Legends is bringing businesses on-chain through its flagship project Autheo, a Layer-0 OS with an integrated Layer-1 blockchain. Mainnet launched May 14, 2026.