We’re looking for an incredible software engineer to help us build the future of blockchain scalability. You will work on the systems that deploy and upgrade our core supported rollup frameworks - Arbitrum, OP Stack, and ZKsync – as well as make them work with emerging technologies from shared sequencers to alternative DA layers. This is the ideal opportunity for an engineer with existing experience working on rollup node software of someone familiar with offchain services which secure significant value.If you’re looking to work in a fast-paced, high-impact team and help shape the direction of our product and company, this position is for you.We’re backed by some of the best investors in the valley and offer competitive pay and equity, and full benefits.<h1>About Caldera</h1>Caldera enables dynamic, scalable blockchain experiences. Currently, dapps that are deployed to general-purpose blockchain compete with thousands of other applications for space on the network — this can lead to <a target="_blank" href="https://www.coindesk.com/tech/2022/01/06/polygon-under-accidental-attack-from-swarm-of-sunflower-farmers/">congestion and high fees</a> or even <a target="_blank" href="https://fortune.com/2022/01/25/solana-founder-anatoly-yakovenko-crypto-crash-blockchain-instability/">network outages</a>.That’s where we come in. We’re building software that makes it easy for the most innovative blockchain applications to launch their own ultra-performant blockchains (<a target="_blank" href="https://ethereum.org/en/developers/docs/scaling/#rollups">rollups</a>), enabling applications to own their ecosystem, scale to millions of users, and provide a superior user experience to their players.We’re located in San Francisco and New York, and work in-person or remotely.As a Senior Protocol Engineer at Caldera, you will:<ul><li>Help architect the blockchain nodes that comprises the backbone of our software offering. You’ll be working on the cutting edge of blockchain scaling, building new kinds of L2s.</li><li>Develop improvements to rollup stacks like OP, zksync, and Arbitrum Orbit, making them higher throughput and more reliable.</li><li>Create systems that ensure zero-downtime network upgrades of high TPS chains caldera has in production, which secure hundreds of millions of dollars in value. </li><li>Write efficient and secure EVM smart contracts in solidity</li><li>Drive the technical direction, establish roadmaps, communicate and collaborate with internal and external partners to help Caldera win.</li></ul><h2>You might be a fit for this role if you...</h2><ul><li>Have 4+ years of engineering experience, including at least 1 year of experience working with EVM-related protocols (dApps, Rollups, Solvers, etc).</li><li>Have a deep knowledge of Go, Rust or similar languages</li><li>Have built Ethereum “dapps” with Solidity or Yul</li><li>Have experience developing and deploying distributed systems.</li><li>Love writing fast, well-optimized, well-tested, clean code</li><li>Are great at solving complex design, latency, or performance problems in high-throughput production systems.</li><li>Are confident with performance optimization, identifying bottlenecks and scalability concerns</li></ul><h2>Bonus points if you...</h2><ul><li>Are up-to-date with Ethereum scaling solutions such as sidechains or rollups</li><li>Have implemented or used a consensus algorithm (eg. Paxos/Raft, pBFT, tendermint, ...) in the past</li><li>Have an understanding of cryptography primitives, such as hash functions or digital signatures</li><li>Have significant open-source contributions, especially in blockchain clients/node software, databases, networking, or programming languages/frameworks</li></ul>