Head of Blockchain Engineering

Remote

Elysium’s City OS includes tokenized/rewards flows and a decentralized component designed to seed and scale the network responsibly—while keeping the experience simple for everyday residents.

This role is for someone who can build secure distributed systems without turning the product into crypto theater.

The mission (what you’ll actually do)

You will own the blockchain layer: architecture, implementation, security, and integration with the City OS.

You will:

Design and implement smart-contract / ledger components that support rewards and tokenized flows.
Build a secure integration layer between web2 systems (apps, ops tools) and decentralized primitives.
Define wallet/key management approaches that are safe, recoverable, and user-friendly.
Own security reviews, threat modeling, and incident readiness for the chain layer.
Partner with legal/compliance and product to ensure feasibility and survivability.

Profile we’re looking for (non-negotiables)

7–12+ years engineering, with serious depth in distributed systems and security.
Proven blockchain engineering experience in production (not prototypes only).
Strong cryptography instincts: threat models, key management, smart contract safety.
Pragmatic mindset: builds what is needed, avoids complexity as a reflex.

What you’ll build in your first 90 days

A chain architecture and threat model aligned to Elysium’s real flows.
MVP contracts/integrations with a clean upgrade and governance story.
Operational guardrails: monitoring, alerts, runbooks, recovery plans.
A clear spec for tokenized flows that product and engineering can execute on.

How to apply

Submit your resume using the “Apply” button below.Record a 1-minute video (one take, unscripted — without reading; script reading won’t be entertained).

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