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Founding AI Engineer (LLM Features & Agentic Systems)

United States
Visa Sponsorship
This Job is No Longer Active This position is no longer accepting applications
AI Summary

Own the prompts, agents, evals, and pipelines behind user-facing AI features at a high-growth startup. Turn product requirements into production-ready AI systems, rigorously evaluate output quality, and iterate rapidly. Requires 2+ years in early-stage startups, strong TypeScript/Python skills, and hands-on LLM experience.

Key Highlights
Founding engineer role owning AI features end-to-end, from prototype to production
In-person role, 5 days/week in SOMA, San Francisco or New York
Requires 2+ years in early-stage, high-growth, VC-backed startups
Salary $180K-$250K plus competitive equity
Visa sponsorship available for E3, H1B transfers, TNs (no new H1Bs)

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Key Responsibilities
Build new AI features end to end, from prototype to production.
Improve AI output quality through prompt engineering, model selection, retrieval, and evaluation.
Design and run evals that measure real output quality, not just first impressions.
Iterate fast on prompts, agent designs, and orchestration patterns.
Partner with the Product Engineer to translate requirements into AI features that actually work.
Partner with the AI Platform team to land features on solid infrastructure.
Evaluate new models, tools, and techniques when they improve quality, latency, cost, or reliability.
Technical Skills Required
TypeScript Python LLM

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Benefits & Perks
Salary $180K-$250K
Competitive equity
Visa sponsorship (E3, H1B transfers, TNs)

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Nice to Have
Experience with eval systems, structured output, and function calling.
Experience with Anyscale Ray or similar distributed compute frameworks for batch inference, eval pipelines, or scaling agent workloads.
Open source contributions in the LLM or agent tooling space.
Familiarity with pgvector or other vector retrieval systems.
Experience with post-training or fine-tuning.
Enterprise vertical SaaS experience.
Forward Deployed Engineer or explicitly customer-facing type experience.

Job Description

NOTE : Candidates should have Min of 2 years experience in early stage, high growth, VC backed start-up

About the job

One of our start-up clients is hiring a full-time Founding AI Engineer to own the prompts, agents, evals, and pipelines behind user-facing features that ship to users.

 

You'll take product requirements and turn them into working prompts, agents, and pipelines. You'll evaluate them rigorously, iterate until they're production-ready, and keep improving them once they ship. This role sits at the intersection of product and platform: you decide what the AI should do, prove it works, and get it in front of users.

 

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Job Overview
Posted Sep 24, 2026
Employment Full-time
Experience Entry level
Location United States
Category Programming
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