Senior Backend Engineer, ZeroDev Wallet

The role

You will build and run production Go backend services for ZeroDev's embedded, non-custodial wallets, including wallet creation, authentication and signing. The role is security-critical infrastructure with a high review bar and external security audits.

What you will do

• Build and operate Go services that power wallet creation, authentication, and signing at scale
• Work on key recovery and the committee trust model, including distributed key generation and secret sharing
• Operate code under hardware isolation and remote attestation in Trusted Execution Environments
• Build user-facing auth methods that gate signing, including passkeys, OAuth, OTP, sessions and 2FA
• Integrate with a third-party signing provider, including authorization, policy flows and quorum approvals
• Write design docs and decision records, and work directly with external security auditors
• Run production operations on Kubernetes, including observability, alerting, secrets, certificates and on-call
• Maintain compliance controls such as sanctions screening and PII-safe handling

Required qualifications

• Strong backend engineer who has shipped and operated production services in Go, or an adjacent systems language and eager to go deep in Go
• Security-first mindset: thinks about threat models, blast radius and key custody
• Comfortable with applied-cryptography fundamentals such as public-key cryptography, signatures and key management
• Solid on distributed systems and API design, including idempotency, failure modes and service boundaries
• Operationally experienced with production infrastructure, Kubernetes, observability and incident response
• Clear written communicator who can explain decisions through design docs and decision records

Nice to have

• Trusted Execution Environments such as AWS Nitro Enclaves or Intel SGX / TDX
• Threshold cryptography or MPC, including DKG, FROST, verifiable secret sharing or resharing
• Account abstraction, including ERC-4337, EIP-7702, smart accounts or embedded wallets
• Custody or signing infrastructure such as Turnkey or Fireblocks
• HSMs, YubiKey / PIV or secure-element integrations
• Third-party security audits and driving remediation to completion
• WebAuthn / passkeys, OAuth / OIDC, or the Go crypto ecosystem

Benefits

• Remote-first global workforce with an NY office
• Professional reimbursement program for industry conferences, certifications and more
• Medical, dental and vision coverage (US and some other countries)
• 401k retirement plan with company match (US only)
• Wellness stipend
• Home office setup and ergonomic equipment program

Before you apply

• This role cannot be performed in California or Colorado
• Offchain warns of fraudulent recruiter activity and offers jobs@offchainlabs.com to verify an offer or a recruiter

About the company

Offchain builds the Arbitrum stack that powers Arbitrum One, a widely adopted Ethereum scaling solution. The company reports $124 million in funding and says over 100 teams have used its technology to build Arbitrum chains.