Senior Software Engineer, Developer Platform

Offchain Labs

Senior Software Engineer developing backend processes for blockchain technology at Offchain. Championing security and integrity while working on innovative blockchain applications.

Posted 7/7/2026full-timeRemote • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies

AWSDistributed SystemsGoKubernetes

About the role

Key responsibilities & impact

The Developer Platform team builds KMS, the key-management and signing service behind ZeroDev's embedded wallets (smart-account / account-abstraction wallets that app developers drop into their products). It is non-custodial: end users control their keys, and the service orchestrates secure creation, authentication, and signing on top of a third-party signing provider. This is security-critical infrastructure, externally audited, with a high review bar. You will own backend services and the cryptographic recovery and trust-model machinery around them on a small, high-ownership team, and help grow the platform from interactive consumer wallets toward programmatic and automated signing and programmable transaction policy.
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)

Requirements

What you’ll need

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

Benefits

Comp & perks

Remote-first global workforce + NY office
Annual company offsite + team onsites
Professional reimbursement program (facilitates industry conference attendance, certifications, and more)
Medical, dental & vision coverage (US + some other countries)
401k retirement plan + company match (US only)
Wellness stipend
Home office set up / ergonomic equipment program

ATS Keywords

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Hard Skills & Tools

Go ProgrammingDistributed Key GenerationPublic-Key CryptographyAPI DesignThreshold CryptographySmart-Account DevelopmentIncident ResponseSecurity AuditingAuthentication IntegrationObservability Practices

Soft Skills

Clear Written CommunicationCollaborative Teamwork