Senior Blockchain Platform Engineer: Scale Transactions

Castle Island; Northern, New York (KY, NY); Hybrid; USD 190,000 - 255,000; Full time

Benefits offered by this job

Competitive salary package

Equity package

Pay-for-performance equity bonus

Moonshot award

Pension

Hybrid working schedule

Remote working allowance

Home office setup allowance

Annual training budget

Monthly product budget

Job summary

MoonPay is seeking engineers to help design and operate high-volume transaction infrastructure across cross-chain DeFi flows. You will own end-to-end systems from broadcast pipelines to lifecycle management and wallet automation, ensuring reliability and financial correctness.

Join a fast-moving, high-ownership environment where production uptime, incident response, and collaboration with product teams shape scalable, secure infrastructure for trillions of value transfers.

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.

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 fundamentals

Production systems

Live blockchain networks

Transaction lifecycle

Failure mode thinking

Job description

MoonPay is seeking engineers to help design and operate high-volume transaction infrastructure across cross-chain DeFi flows. You will own end-to-end systems from broadcast pipelines to lifecycle management and wallet automation, ensuring reliability and financial correctness.

Join a fast-moving, high-ownership environment where production uptime, incident response, and collaboration with product teams shape scalable, secure infrastructure for trillions of value transfers.