Full Stack Engineer / Senior Backend Engineer

Improbable is a British technology unicorn ($5 billion+ valuation) creating L1 Somnia, processing 1M+ TPS with 110M+ wallets and 70+ projects. Offchain Labs is the core of the Arbitrum ecosystem ($20 billion TVL, 2.1 billion+ transactions) with $124 million in funding.

### Full Stack Engineer (Improbable / Somnia) - Full lifecycle (prototype → deployment) - Create SDK/CLI/internal tooling - Collaborate with DevRel/Marketing/BD ### Senior Backend Engineer, Rust (Offchain Labs / Arbitrum) - Develop Nitro (Arbitrum node) - Optimize execution engine / networking / state management - Ensure observability and security

### Full Stack Engineer (Improbable / Somnia) - Strong TypeScript - Understanding of on-chain products - Autonomy and ability to balance speed and reliability ### Senior Backend Engineer, Rust (Offchain Labs / Arbitrum) - Expert in Rust - Experience in production development - Interest in runtimes / WASM / developer tooling - Plus: experience with WASM, open-source in Rust ecosystem, knowledge of blockchain infrastructure

### Full Stack Engineer (Improbable / Somnia) - Salary: ~$80,000 – $100,000 per year (gross) ### Senior Backend Engineer, Rust (Offchain Labs / Arbitrum) - Salary: ~$110,000 – $150,000 per year (gross)

Offchain Labs is a venture-backed, Princeton-founded company that has dedicated over 8 years to blockchain research and development. As the original developers of Arbitrum, a leading optimistic rollup scaling solution for Ethereum, Offchain Labs has revolutionized the industry by enabling high-throughput, low-cost smart contract execution. The company also built Prysm (the leading Ethereum consensus client) after acquiring Prysmatic Labs in 2022, and continues to innovate with products like Arbitrum Orbit, Stylus, and Nitro. Improbable is a separate British venture builder focused on AI, Web3, and the metaverse, having launched nine ventures including Yuga Labs’ Otherside platform and the Somnia blockchain.