Staff Backend Engineer, MPC Custody Platform
Core
Design and ship the security-critical backend components of an MPC-based crypto custody platform for institutional and retail clients.
Role type
Staff Backend Engineer (Security-Critical Core)
Builds
Policy engine, signing orchestration, key lifecycle workflows, recovery flows, multi-tenant wallet services, and high-load SaaS systems.
Domain
Cryptocurrency custody, MPC, threshold signing, distributed systems, fintech security.
Deliverable
production ML models | product features | infrastructure
Required skills
Concurrency and distributed systems fundamentals, modern systems languages (Go, Rust, Java, C++), high-load multi-tenant SaaS architecture, security-by-design, relational database modeling, observability, AI-assisted code review and development.
Preferred skills
MPC/HSM/Ledger integration, blockchain ecosystems (EVM, Bitcoin, Cosmos, Solana), Kubernetes, SRE practices, regulated-environment experience (SOC 2, ISO 27001, DORA), custom AI agent development.
Technologies
Go, Rust, Java, C++, gRPC, HTTP, Kafka, NATS, Postgres, HSM, Ledger, Claude Code, Cursor, Codex.
Responsibilities
Design and ship critical platform components (policy engine, signing orchestration, key lifecycle), lead cross-cutting initiatives via RFCs and code, build high-load multi-tenant SaaS systems, implement security-by-design patterns, profile and optimize performance, mentor senior engineers through code reviews and design notes.
Seniority
Staff, hands-on IC with technical leadership