Senior Software Engineer, Developer Platform
Build and operate the secure, non-custodial KMS backend for ZeroDev embedded wallets on the Developer Platform team. Own Go services for key recovery, TEEs, authentication, and signing integration in a security-critical, high-review environment.
About the job
What you'll work on
- Go backend services that broker wallet creation, authentication, and signing at scale.
- Key recovery and the committee trust model: distributed key generation and secret sharing that keep the service non-custodial, with recovery authority split across independent committees so no single party ever holds a user's key.
- Trusted Execution Environments: reconstructing and operating on key material under hardware isolation and remote attestation.
- Authentication and signing-provider integration: the user-facing auth methods that gate signing (passkeys / WebAuthn, OAuth, OTP, sessions, 2FA), and integrating with a third-party signing provider (authorization and policy flows, scoped credentials, quorum / consensus approvals).
- Security review and hardening: writing design docs and decision records, working directly with external security auditors, and turning a high review bar into shipped code.
- Production operations on Kubernetes: observability and alerting, secrets and certificate management, on-call, and the compliance controls the domain requires (sanctions screening, PII-safe handling).
Who you are
- A strong backend engineer who has shipped and operated production services in Go (or an adjacent systems language and is eager to go deep in Go).
- Security-first by default: you reason about threat models, blast radius, and key custody as a habit, and you write code that holds up to security-critical review.
- Comfortable with applied-cryptography fundamentals (public-key crypto, signatures, key management). You do not need to be a cryptographer, but you can reason about it and learn fast.
- Solid on distributed systems and API design: idempotency, failure modes, and clean service boundaries.
- Operationally mature: Kubernetes, observability, and incident response are not foreign to you.
- Clear written communicator (design docs, decision records) who thrives in a collaborative, review-heavy culture.
Nice-to-have
- TEE experience (AWS Nitro Enclaves, Intel SGX / TDX, or similar): attestation, enclave key handling, reproducible enclave builds.
- Threshold cryptography / MPC in practice: DKG, FROST or other threshold signatures, verifiable secret sharing, resharing.
- Account abstraction: ERC-4337, EIP-7702, smart-account or embedded / non-custodial wallet experience.
- Built on or integrated a custody / signing provider (Turnkey, Fireblocks, or similar), or built one.
- HSM / YubiKey / PIV / secure-element integration.
- Been on the receiving end of a third-party security audit and driven the remediation.
- WebAuthn / passkeys, OAuth / OIDC, and the Go crypto ecosystem.
Skills
Go, Kubernetes, Distributed Systems, Cryptography, Aws Nitro Enclaves, Intel Sgx, Webauthn, OAuth, Erc-4337, Mpc, Threshold Signatures, Hsm, Yubikey
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