Senior/Staff Backend & Platform Engineer (FinOps, IAM & Blockchain)

Role Summary

As a Senior / Staff Backend & Platform Engineer at Moonshot, you'll own some of the most critical systems in our stack:identity and access, funds movement and ledgering, and the blockchain infrastructure that powers our on-chain trading.

This role is similar to staff engineers at leading crypto wallets and exchanges who own authentication stacks, key management, and high-scale financial backends. You'll design, build, and operate systems that must be both highly reliable and extremely secure, enabling product teams to move quickly on a solid foundation.

Responsibilities

Design, build, and operate Identity & Access Management services:

• Authentication flows, sessions, device trust.
• Authorization and entitlements (roles, permissions, policies).
• Security controls such as MFA and key management (working with security teams).
• Own: financial operations systems
• Transfers and payments orchestration.
• Ledgering and reconciliation flows.
• Limits, risk controls, and transactional correctness.
• Build and maintain: blockchain infrastructure
• Node and RPC management.
• Transaction submission, monitoring, and retry logic.
• Indexing and streaming of on-chain data into internal services and data stores.
• Define and uphold: reliability and observability standards
• SLOs and error budgets for core services.
• Dashboards, alerts, runbooks, and incident management practices.
• Lead large, cross-functional technical projects from design through rollout, collaborating with Product, Security, and Ops.
• Mentor and guide other engineers, contributing to engineering standards, design reviews, and documentation.
• Stay close to industry best practices in auth, key management, and secure infrastructure for crypto and trading.

Requirements

• 5-12+ years of backend or product or platform engineering, including experience with high-scale,

high-availability systems in fintech, crypto, or similar domains.

• Deep expertise in at least one of: Identity & access / security engineering; Financial systems / ledgering /

payments; Blockchain infrastructure / on-chain data.

• Strong experience designing and operating distributed systems (datastores, queues, streaming, background

workers).

• Track record driving architecture decisions and seeing them through implementation and adoption.
• Strong operational mindset: monitoring, on-call, incident response, and postmortems.

Bonus Skills

• Experience with Flutter, React Native, React, Headless CRMs.
• Experience with Go, Rust, Solana.
• Experience with Google Cloud or Amazon Web Services.
• Experience with crypto wallets, exchanges, or onchain protocols including DeFi, L2s, ZK.
• Exposure to data warehousing and analytics for financial reporting.
• Contributions to open-source projects