Blockchain Engineer, Polygon Anchoring

About the position

You will own Shield's on-chain anchoring stack on Polygon: the smart contracts that record certificate hashes immutably and publicly, the gas optimization, the confirmation latency budget, and the cross-chain expansion as Shield enters new jurisdictions.

Job responsibilities

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• Operate the Polygon anchoring layer: smart contracts, gas budgeting, confirmation latency tracking.
• Optimize per-certificate gas cost (currently sub-euro 0.01 per anchor) and confirmation latency (sub-2 seconds).
• Maintain the tamper-evident audit-log smart contracts and their upgrade pathway.
• Lead cross-chain anchoring strategy for jurisdictional expansion (US, UK, Singapore, Japan).
• Collaborate with the Cryptography Engineer on the on-chain dimension of key custody and attestation.

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