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# Senior Protocol Engineer

- **Company:** Cielo
- **Location:** New York, NY, United States
- **Experience:** Expert
- **Salary:** $140,000.0 - $180,000.0
- **Contract:** Permanent contract
- **Skills:** Distributed Systems, Blockchain, Rollup, Enterprise Integration, Solidity
- **Published:** October 12, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=067090077904ae0f

## About the Role

* 5+ years in blockchain/DLT, smart-contract engineering or backend distributed systems.
 * Strong Solidity/EVM (or equivalent) and integration skills.
 * Experience with rollup/upstream-diff maintenance (Optimism stack or comparable) an advantage.
 * Comfort carrying production on-call responsibility.

Success measures

 * On-spec, on-time delivery within the release train.
 * Post-release defect and rework rate.
 * On-call response within target.

## Description

* Design and build components within the smart-contract release train.
 * Contribute to maintaining and testing the Fusion-specific upstream diff against Optimism.
 * Guide Protocol Engineers through implementation and review their work.
 * Carry the on-call escalation rotation and join incident bridges for protocol-behavior issues.
 * Support external audit preparation and remediation for assigned components.