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OnePay Logo OnePay · IT - Software Development

Backend Engineer, Crypto

United States 140000.00 - 170000.00 USD / Year · Job Posted February 21, 2026
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Job Description

As a Backend Engineer on the Crypto team at OnePay, your work will help define how customers buy and hold digital assets safely within our financial ecosystem — ensuring every experience meets the same standard of trust, performance, and scalability as our core banking systems.

Job Responsibility

  • Build and maintain backend services that enable our crypto product
  • Design APIs and event-driven architectures to handle high-volume transaction processing securely and efficiently
  • Partner with platform and infrastructure engineers to ensure scalability, observability, and resilience
  • Contribute to documentation, tooling, and best practices that raise the bar across our engineering organization

Requirements

  • 5+ years of professional experience in backend or distributed systems development
  • Proven success building production-grade APIs and financial services at scale
  • Proficiency in Node.js or similar modern backend frameworks (TypeScript, NestJS, Go, or Java)
  • Familiarity with cloud-native architecture (Kubernetes, AWS) and event-driven or microservice-based systems
  • Strong communication and collaboration skills across product and platform teams
  • Drive and proactivity – everyone here is a builder and executor

Nice to have

  • Familiarity with modern software engineering practices
  • Experience with Node and TypeScript on the server
  • Experience with NestJS framework within a microservice-oriented architecture running on Kubernetes and AWS
  • Experience building for iOS, Android, and web platforms using React Native

What we offer

  • Offers Equity
  • Competitive base salary, stock options, and health benefits from Day 1
  • 401(k) plan with company match
  • Remote-friendly (US), flexible time off (FTO), and opportunities for growth
  • A high-growth, mission-driven, inclusive culture where your work has real impact
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