Backend Engineer, AI

What You'll Do

• Be a critical part of the technical and product roadmap
• Build and scale the backend systems, APIs, and data pipelines that power Rain
• Design and ship AI-powered features, agents, and automation into our core platform
• Build shared AI infrastructure: composable tool interfaces, eval frameworks, and permission-aware data access
• Rapidly ship new capabilities to our customers and internal teams
• Work embedded with the business, understand the workflows you're building for firsthand

What We're Looking For

• Experience with Node.js and other backend technologies
• 1–3+ years building production systems that use LLMs, tool calling, structured outputs, prompt architecture, retrieval patterns
• A builder mentality, someone who experiments with side projects
• Comfortable with ambiguity, you can take a loosely defined problem, make decisions, and ship
• This position is for folks with 3–8+ years of experience, compensation will be based on experience

Nice to Have

• Eval framework design, building systematic ways to measure AI quality
• Fintech experience (neobank or card issuing experience gets extra brownie points)
• Experience building internal tools or platform systems at a growth-stage company

Things that enable a fulfilling, healthy and happy experience at Rain:Unlimited time off 🌴Unlimited vacation can be daunting, so we require Rainmakers to take 10 days minimum for themselves.

Flexible working ☕ We support a flexible workplace, if you feel comfortable at home please work from home. If you’d like to work with others in an office feel free to come in. We want everyone to be able to work in the environment in which they are their most confident and productive selves. New Rainmakers will have a stipend to create a comfortable atmosphere at home.

Easy to access benefits 🧠For US Rainmakers, we offer comprehensive health, dental and vision plans for you and your dependents, as well as a 100% company subsidized life insurance plan.

Retirement goals💡Plan for the future with confidence. We offer a 401(k) with a 4% company match.

Equity plan 📦 We offer every Rainmakers an equity option plan so we can all can benefit from our success.

Rain Cards 🌧️ We want Rainmakers to be knowledgeable about our core products and services. To support this mission, we issue a card for our team to utilize the card for testing.

Health and Wellness 📚 High performance begins from within. Rainmakers are welcome to use their card for eligible health and wellness spending like gym memberships/fitness classes, massages, acupuncture - whatever recharges you!

Team summits ✨ Summits play an important role at Rain! Time spent together helps us get to know each other, strengthen our relationships, and build a common destiny. Expect team and company offsites both domestically and internationally.