Founding Member of the Technical Staff

5 days ago


New York, New York, United States Motion Recruitment Full time

Founding Full Stack Engineer (In-Person, NYC)
Join a small, technical team building the future of LLM infrastructure. We're creating open-source tools that help developers optimize and monitor LLM applications at scale — from prompt tuning and routing to real-time evaluations and A/B testing. We're looking for a founding engineer who is excited to work across the stack and contribute to impactful, user-facing features.

Our Stack
Frontend: React, Radix UI

Backend: Rust, TypeScript

ML: Open-source tools for fine-tuning, evaluation, and experimentation

Infra: Unified API for LLMs with built-in observability and routing

This is an in-person role based in New York City. We work together in the office five days a week to maximize collaboration and speed.

What You'll Do
Build and own high-impact features across our product surface

Contribute to open-source tooling and infrastructure for LLM applications

Collaborate with experts in frontend, backend, and machine learning

Lead development of critical components like our observability dashboard

Shape the early engineering culture, practices, and roadmap

Required Skills & Experience
4+ years of experience as a software engineer

Proven ability to take ownership of complex, full-stack projects

Strong product sense and attention to design and developer experience

Comfort working in fast-paced, in-person environments

Curiosity and hunger for continuous learning and improvement

The Offer
Salary: Competitive and tailored to experience

Equity: Founding-level equity package

Benefits: Full health coverage, in-person perks, and generous PTO

Growth: Work directly with world-class engineers and researchers

Backers: Supported by top-tier investors with years of runway

Posted By:
Henry Mills



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