Spire Labs - Senior Rust Engineer – Based Rollups (3)

At Spire Labs, we’re building the future of rollup infrastructure with a bold vision: synchronous cross chain composability.

Today, rollups are siloed. Developers are forced to choose between scalability and interoperability. We think that’s a false choice.

Spire is creating a modular rollup framework that allows chains to remain sovereign while achieving cross chain synchronous composability—no trusted bridges, no brittle async calls.

We’re pioneering a new architecture where:

• App-specific L3s can interoperate as smoothly as contracts on Ethereum.
• Shared sequencing, preconfirmations, and unified execution environments unlock atomic, cross-chain interactions.
• Developers no longer need to choose between performance and composability.

“Imagine every rollup could synchronously compose with every other. No bridges, no delay, no fragmentation. Just fast, seamless cross-chain UX. That’s the future we’re building.”

We’re early-stage, ambitious, and backed by some of the best minds in Ethereum. Come help us build the L3 Based Appchain Stack—an open, composable future for rollups.

• 5+ years of software engineering experience, with strong focus on production grade Rust
• Deep understanding of systems programming, concurrency, memory safety, and performance optimization
• Experience with Ethereum or other blockchain systems (client implementations, zk tooling, rollups, etc.)
• Familiarity with L2 architectures like optimistic rollups, zk-rollups, modular stacks
• Bonus: contributions to open-source Rust or crypto projects, familiarity with Cairo, zkVMs, Layer Zero, Succinct