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Agent Systems Engineer – AI Model Routing

rnb consultancy • United States
Visa Sponsorship Relocation
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Own the full agent lifecycle at a seed-stage AI startup building a model router and AI agents for real business tasks. Responsibilities span agent execution, memory, tool use, integrations, infrastructure, reliability, and on-site customer work. Requires strong software engineering fundamentals, at least 1 year on AI/agent systems, startup ownership, and full-time on-site presence in San Francisco.

Key Highlights
Seed-stage AI startup in San Francisco with ~100 customers worldwide
Own agent execution, memory, skills, tool use, integrations, infrastructure, and reliability
On-site in San Francisco 5 days/week (9-9-6) plus global customer travel
$180k–$300k base + 0.1–0.5% equity, company apartment, relocation support, visa sponsorship
Key Responsibilities
Agent execution, memory, skills and tool use
Integrations, infrastructure and the interfaces customers use
Reliability: evals, observability and failure handling
On-site work with customers around the world, sometimes for a week
Benefits & Perks
0.1–0.5% equity
company apartment
relocation support
visa sponsorship
Nice to Have
TypeScript or Node.js
integrations
evals
agent memory or runtimes
Software deployed inside customer environments
Founder experience or a deep area you can teach

Job Description

Agent Systems Engineer – AI Model Routing Startup

RnB Consultancy

San Francisco, CA

$180,000 - $300,000 a year

Full-time

Weekends as needed

San Francisco, CA

You've shipped AI agents to production and made them reliable. Own the whole agent lifecycle at a fast-growing AI startup.

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