Senior Blockchain Engineer: High-Volume Cross-Chain Payments

Wired Currencies; New York, Northern (NY, KY); Hybrid; USD 150,000 - 210,000; Full time

Job summary

MoonPay in New York, NY seeks a Senior Blockchain Engineer to advance transaction infrastructure for crypto, stablecoins, tokenized assets and payments. The hybrid role focuses on high-throughput, reliable systems, wallet custody interfaces, and cross-chain flows while ensuring financial correctness.

Applicants should have production experience with live blockchains, transaction lifecycles, and the ability to explain incidents end-to-end.

Qualifications

• Strong backend and platform engineering fundamentals for production systems.
• Experience with live blockchain networks and transaction lifecycles.
• Familiarity with wallet infrastructure, custody systems, and high-throughput services.

Responsibilities

• Design transaction broadcasting and lifecycle systems.
• Build state machines for partial failures and recovery.
• Improve observability, alerting, reliability and resilience.
• Develop off-chain services that interact with on-chain contracts.

Skills

Backend engineering

Live blockchain networks

Transaction lifecycles

Wallet infrastructure

Custody systems

High-throughput systems

Financial systems

Ethereum / Bitcoin / Solana wallet

Tools

Ethereum

Bitcoin

Solana

Blockchain indexing

Event ingestion

Backend smart contract interaction

Job description

MoonPay in New York, NY seeks a Senior Blockchain Engineer to advance transaction infrastructure for crypto, stablecoins, tokenized assets and payments. The hybrid role focuses on high-throughput, reliable systems, wallet custody interfaces, and cross-chain flows while ensuring financial correctness.

Applicants should have production experience with live blockchains, transaction lifecycles, and the ability to explain incidents end-to-end.