As a Senior AI Engineer, you will build systems where AI agents work alongside humans. You will move beyond writing manual code to designing the specs, harnesses, and evals that ensure agent reliability. Working across TypeScript and Python, you will own features end-to-end, creating high-impact tools that redefine how people and machines collaborate.
Senior AI Engineer at well-funded AI infrastructure startup
Most engineering teams are wondering if AI will replace them; this team is busy building the 'crew' that makes one engineer as productive as thirty. We are looking for a Senior AI Engineer to architect the future of human-agent collaboration. You won't just write code—you will build the harness, evals, and specs that allow AI agents to ship production-grade software. If you have 5+ years of full-stack experience and have shipped real LLM products, join this well-funded startup to own features end-to-end and work at the absolute frontier of AI engineering.
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Location
Remote
Compensation
Not Disclosed
Company
Confidential company
Role overview
About the company
Well-funded AI infrastructure startup
What you will do
- Own end-to-end features across a TypeScript/Node API, a Python agent runtime, and a Next.js frontend architecture.
- Build and harden agentic workflows with humans-in-the-loop, including drafting pipelines, review queues, and escalation logic to ensure output quality.
- Develop quality infrastructure including eval sets that gate CI, guardrails traced to real incidents, and regression tests that pin every fix.
Who this is a fit for
- Has 5+ years of experience shipping production software across the stack with high proficiency in both TypeScript and Python.
- Has successfully shipped at least one LLM-powered system to real users, featuring robust evals, guardrails, and failure-mode management.
- Demonstrates high CLI fluency and experience building custom harnesses, such as MCP servers or context engineering tools, to direct agents effectively.
Why this role is remarkable
- Join a forward-thinking team where AI agents write the majority of the code while you act as the architect and human-at-the-helm.
- Backed by top-tier VCs, this startup is building the essential verification layer for a future where every AI acts on behalf of an accountable human.
- You will have total autonomy to own features from wireframe to production across products focused on AI-native recruiting and professional workflows.
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and Confidential company wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.