Senior AI Builder

Position Summary

EarnIn is making AI-native engineering a core capability. We're hiring an AI builder who also writes great software. This is not a side project. The agents and harnesses you build here will run in production, making real decisions for real people.

What You'll Do

• Design how agents think — prompts, reasoning chains, tool calls, and the full architecture beneath them.
• Build production infrastructure for agents and harnesses.
• Reimagine the product development lifecycle, replacing manual friction with agentic workflows.
• Own the evaluation infrastructure, building pipelines, benchmarks, and quality gates.
• Build reusable libraries, templates, and reference implementations for AI integration.

What Success Looks Like

• Troubleshooting and rework loops are minimized as teams across engineering ship AI-assisted features faster.
• The harnesses you build are actively used and well-documented.
• Ai pilot quality and safety metrics are visible, trustworthy, and improving.

What We're Looking For

• 4+ years of full-time software engineering experience, with at least 2 years building tooling, platforms, or internal developer products.
• Bachelor’s, Master’s, or PhD in Computer Science, Computer Engineering, or a related technical discipline, or equivalent industry experience.
• Hands-on experience with LLM integration patterns — prompt engineering, RAG pipelines, tool/function calling, and agent architectures.
• Proficiency and comfort working across the stack when needed.
• Experience with MCP, LangChain, or comparable orchestration frameworks.
• Experience with open source LLM models.
• Strong opinions about developer experience and a track record of building things other engineers actually use.

Additional Information

At EarnIn, we believe that the best way to build a financial system that works for everyday people is by hiring a team that represents our diverse community. Our team is diverse not only in background and experience but also in perspective. We celebrate our diversity and strive to create a culture of belonging. EarnIn does not unlawfully discriminate based on race, color, religion, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, legally protected medical condition, family care status, military or veteran status, marital status, registered domestic partner status, sexual orientation, genetic information, or any other basis protected by local, state, or federal laws. EarnIn is an E-Verify participant.

Application Instructions

No unsolicited resumes from individual recruiters or third-party recruiting agencies will be accepted.