Senior Blockchain Engineer - Remote, Equity & Impact

MoonPay Inc.; New York (NY); Hybrid; USD 150,000 - 210,000; Full time

Benefits offered by this job

Competitive salary

Equity package

AI tools access

Hybrid working schedule

Private healthcare

Annual training budget

Remote work allowance

Lunch credit

Home office setup allowance

Pension

Job summary

MoonPay is seeking a backend-focused engineer to own high-volume, production-grade infrastructure shaping transaction broadcasting, wallet automation, and cross-chain flows. You will work on end-to-end ownership, reliability, and scalability in a fast-paced, high-velocity environment.

You will interact with live blockchain networks, design robust failure strategies, and collaborate with product teams to deliver secure, audited financial systems across multiple chains and platforms.

Qualifications

• Strong backend/platform engineering fundamentals.
• Experience operating production systems with 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.

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
• 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

Skills

Backend engineering

Production systems

Live blockchain networks

Transaction lifecycle

Failure mode thinking

Wallet infrastructure

MEV awareness

High-throughput systems

Exchanges custody DeFi

Cross-chain orchestration

Robust incident response

Blockchain indexing

ERC-20/SPL familiarity

Job description

MoonPay is seeking a backend-focused engineer to own high-volume, production-grade infrastructure shaping transaction broadcasting, wallet automation, and cross-chain flows. You will work on end-to-end ownership, reliability, and scalability in a fast-paced, high-velocity environment.

You will interact with live blockchain networks, design robust failure strategies, and collaborate with product teams to deliver secure, audited financial systems across multiple chains and platforms.