Senior Backend Engineer

## About the RoleMoonshot is the “Robinhood for DeFi”—an iOS and Android app that lets anyone trade cryptocurrencies on-chain through a user-friendly interface.Since our launch in July 2024, we’ve attracted 2M+ users.Our mission: Make moonshots possible for everyone.Our vision: Make a world where life-changing financial outcomes are within everyone's reach.Everyone on our team is both a decision-maker and an implementer—united by a sense of urgency and driven by the conviction that our work can transform global finance. If you thrive on curiosity, welcome tough challenges, and aspire to leave a meaningful mark on the world, Moonshot is the place for you. You’ll run toward the hardest problems alongside high-caliber teammates who consistently push each other to excel and who share your dedication to shaping the future of decentralized finance.This role is full-time, preferably located in NYC. Open to remote for the right candidate.The OpportunityAs a Backend 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.What You’ll Do- 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.What We Look For in You- 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 .- Excellent collaboration skills, especially with Product, Security, and Ops.Nice to Haves- 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 .Location- NYC preferred (with periodic in-person sprints).- Remote-friendly within the United States and Canada; travel ~1wk/quarterCompensation & Package- Competitive salary and meaningful equity.- 5% 401(k) match.- Health benefits with employer-covered premiums, plus life insurance coverage.- One-time office setup stipend.- Flexible PTO. #J-18808-Ljbffr