MoonPay - Blockchain Engineer
Requirements
• 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 • BLOCK Values
Responsibilities
• 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, 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 • 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
Benefits
• Pay for performance equity bonus: • 🚀 Moonshot award. • Unlimited holidays: • Hybrid working schedule: • Enhanced parental leave: • Annual training budget: • Remote working allowance: • Monthly budget to spend on our products and zero fee crypto transactions: • Employee referral programme: • Regular remote company offsites: • 🚀 Working in a disruptive and fast-growing company where excellence is rewarded • Commitment To Diversity
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