Blockchain Platform Engineer

📋 Job Overview

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. Four offerings make that real: fund, tokenize, trade, and spend. 30M+ customers and 500+ ecosystem partners run on us. Licensed in the U.S. Regulated across the UK, EU, Canada, and Australia.

🏢 About MoonPay

AI is the default operating mode here. It's woven into every role, and we expect you to use it daily. It handles the manual work so you can deliver on what actually matters. You'll thrive here if outcomes excite you more than process, if impact motivates you more than titles, and if you want hard problems, real ownership, and teammates who love winning, building, and doing it together. The bar is high. The pace is real. We're building for what's next, for humans and agents.

🎯 The Role

Design and improve high-volume transaction broadcasting pipelines, manage transaction lifecycle, detect, retry, rebroadcast, and safely recover stuck transactions. Contribute to wallet infrastructure and automation systems, implement safe parallel transaction handling, improve monitoring, observability, and operational guardrails. 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.

✅ Key Responsibilities

• Design and improve high-volume transaction broadcasting pipelines
• Manage transaction lifecycle
• Detect, retry, rebroadcast, and safely recover stuck transactions
• 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
• 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

📌 Required Qualifications

• 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

⭐ Desirable Experience

• 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

🎁 Benefits

• 💰 Competitive salary package
• 🤝 Equity package: financial freedom starts with our employees, so all employees have ownership at MoonPay
• 📈 Pay-for-performance equity bonus: those who drive out

🛂 Visa & Eligibility