About MoonPay
MoonPay is for builders with something to prove. This isn't a "work on cool crypto stuff" company. It's a high-standards, high-velocity, high-accountability company building the operating system for value movement. If the internet moves information, we move value: crypto, stablecoins, tokenized assets, and whatever comes next. AI is the default operating mode here. It's woven into every role, and we expect you to use it daily.
What You Will Do
Transaction Infrastructure at Scale * Design and improve high-volume transaction broadcasting pipelines * Manage transaction lifecycle * Detect, retry, rebroadcast, and safely recover stuck transactions
Wallet & Lifecycle Management * Contribute to wallet infrastructure and automation systems * Implement safe parallel transaction handling * Improve monitoring, observability, and operational guardrails * Design systems with financial correctness and reconciliation and auditability in mind
Cross-Chain & DeFi Integrations * Build infrastructure supporting cross chain and multi step flows (fiat to on-chain and vice versa) * Handle non-atomic multi-step journeys across chains * Design state machines and recovery strategies for partial failure scenarios * Support routing mechanics and swap execution considerations such as price impact, liquidity changes, including MEV awareness * Build reliable off-chain services that interact with on-chain contracts
End-to-End Engineering Ownership * Participate in estimation, planning, and execution of projects, features, and integrations * Develop and maintain thoroughly tested, high-quality, and performant code * Collaborate closely with Product Managers to design scalable implementation strategies * Contribute to reliable, maintainable systems that evolve with product needs * Participate in incident response and post-mortems * Improve reliability, alerting, and system resilience * Continuously evolve infrastructure to support growing volume and complexity
Salary Bands: $150,000 - $210,000
Must-Have
- Strong backend/platform engineering fundamentals
- Experience operating production systems with real uptime requirements
- Hands-on experience interacting with live blockchain networks in production
- Clear understanding of transaction lifecycle in at least 1 Blockchain and failure recovery
- You think in failure modes, not just happy paths
Strong Signals
- You can explain a real production incident end-to-end
- Experience with at least 1 wallet infrastructure (Eth, Bitcoin, Solana) or custody systems
- Awareness of MEV, slippages, pricing impact and swap execution risks
- Experience with high-throughput or financial systems
Bonus points
- Experience working at exchanges, custody providers, wallet infrastructure teams, or high-volume DeFi platforms
- Familiarity with UTXO-based chains (e.g., Bitcoin), including coin selection and fee bumping strategies (RBF / CPFP)
- Experience designing cross-chain or multi-step transaction orchestration systems
- Familiarity with blockchain indexing or event ingestion pipelines
- Understanding of common token standards (ERC-20, SPL) and interacting with smart contracts from backend services
