Founding Engineer — AI Infra & Agent Platform, Equity

Caylex; San Francisco (CA); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Competitive salary

Equity options

Collaborative work environment

Job summary

A pioneering AI infrastructure company in San Francisco is seeking a Founding Engineer to shape its product and engineering culture. You will work on building scalable backend infrastructure, collaborating closely with the founding team to influence product development and company trajectory. The ideal candidate has over three years of experience in backend development, particularly with AI agents and distributed systems. This role offers the opportunity to join a small, driven team with a competitive salary and equity.

Qualifications

• 3+ years of experience in building large-scale backend infrastructure.
• Understanding of AI agents and scaling challenges.
• Experience building enterprise AI agents.

Responsibilities

• Work full-stack on infrastructure and user-facing features.
• Build high-performance infrastructure for external information access.
• Collaborate with founding team to influence product and company trajectory.

Skills

Large-scale backend infrastructure

Distributed systems

AI agents architecture

MCP systems

API development

Creative problem solving

Job description

A pioneering AI infrastructure company in San Francisco is seeking a Founding Engineer to shape its product and engineering culture. You will work on building scalable backend infrastructure, collaborating closely with the founding team to influence product development and company trajectory. The ideal candidate has over three years of experience in backend development, particularly with AI agents and distributed systems. This role offers the opportunity to join a small, driven team with a competitive salary and equity.