Founding Engineer

at Relari — AI Agent Builder for Software 3.0

San Francisco, CA, USFull-time3+ years$110K - $160K0.25% - 1.50% equityYC-W24

What the role involves

As a founding engineer, you'll help shape the foundation of how intelligent agents are built, verified, and deployed — not just at Relari, but across the next generation of AI-native software.

In this role, you will

  • Architect core systems for Nuvi — designing how natural language specifications are turned into structured, testable agent behavior.
  • Build infrastructure that enables agents to integrate with real-world tools, APIs, and knowledge sources.
  • Ensure agent reliability by developing systems for simulation, automated evaluation, and behavioral verification.
  • Work directly with customers, helping them go from intent to working agents — and using that feedback to inform what we build next.
  • Continuously explore new ways agents can reason, act, and improve — and bring those innovations into the product.

You’re a good fit if:

  • You’ve built and shipped technically complex systems — whether infrastructure, AI tools, or end-user products.
  • You’re a Software Engineer, Machine Learning Engineer, or Research Engineer at a fast-growing software company or top research lab.
  • You thrive in a fast-moving environment and view unstructured environments as opportunities to identify the most impactful work and define the future success of the company.

You operate like a owner

you identify high-leverage problems, drive them to resolution, and raise the bar for the team.

Bonus points if you have

  • Built or contributed to an AI agent framework, orchestration layer, or evaluation pipeline.
  • Trained or fine-tuned foundation models, or worked on tools that enable others to do so.
  • Published in top ML/NLP conferences (e.g. NeurIPS, ICML, ACL) or contributed to widely used open-source projects.

What they ask for

PythonReactMachine learning

About Relari

Relari is building the infrastructure for trustworthy AI agents in the Software 3.0 era. We’re the company behind Nuvi.dev — a natural language agent builder that turns plain-English specifications into intelligent, verifiable agents — as well as the open-source frameworks Agent Contract and continuous-eval, which ensure AI systems behave as intended.

Full Relari profile

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