Backend Engineer (Node.js, API)

Role Overview

Backend Engineer joining Rain’s new AI team to build and scale internal systems and customer-facing infrastructure. You’ll help integrate AI agents, fintech innovations, and stablecoins to deliver production-grade “agentic payment systems.”

Responsibilities

• Contribute to the technical and product roadmap execution
• Build and scale backend systems, APIs, and data pipelines supporting Rain’s infrastructure
• Design and deploy AI-powered features, agents, and automation tools in core platforms
• Create shared AI infrastructure (e.g., composable tool interfaces, evaluation frameworks, permission-aware data access)
• Ship capabilities rapidly to improve customer experience and internal operations
• Partner with business teams to understand workflows and ensure solutions meet operational needs

Requirements

• Experience with Node.js and backend technologies
• 1–3+ years building production systems using LLMs, including tool calling, structured outputs, prompt architecture, and retrieval patterns
• Strong builder mindset and willingness to experiment (including side projects)
• Ability to work in ambiguous environments, make decisions, and ship independently
• 3–8+ years professional experience in relevant fields (compensation based on experience)
• Excellent collaboration and communication skills

Nice to Haves

• Not explicitly stated