Backend Engineer, Crypto

Role Overview

Backend Engineer on the Crypto Team at OnePay. You will help customers buy and hold digital assets safely within OnePay’s financial ecosystem by building backend services that meet the same standards of trust, performance, and scalability as core banking systems.

Responsibilities

• Build and maintain backend services for the crypto product, including Design APIs.
• Develop event-driven architectures to securely and efficiently support high-volume transaction processing.
• Partner with platform and infrastructure engineers to improve scalability, observability, and resilience.
• Contribute to documentation, tooling, and engineering best practices to raise the bar across the 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 with Node.js or similar modern backend frameworks (e.g., TypeScript, NestJS, Go, Java).
• Familiarity with cloud-native architectures such as Kubernetes and AWS, plus event-driven or microservice systems.
• Strong communication and collaboration skills across product and platform teams.

Nice to Have / Helpful

• Familiarity with modern software engineering practices and the ability to ramp up quickly (exact stack experience not required).