CareerPlan

Software Engineer, Horizon

San Francisco, CAFull-time2026-10-22

Core

Build primitives, evaluation systems, and infrastructure for long-running AI agents that pursue complex business outcomes over days, weeks, or months across voice, SMS, and email channels.

Role type

Senior IC software engineer (AI agents & platforms)

Builds

Self-improving long-horizon AI agents, reusable platform systems, and multi-channel engagement tools

Domain

Artificial Intelligence, Large Language Models (LLMs), Customer Service Automation

Deliverable

production ML models

Required skills

Python, TypeScript, Go, React, systems engineering, platform architecture, orchestration, distributed systems, API integrations, data pipelines

Preferred skills

Founder/early engineer experience, workflow orchestration, AI/LLM product deployment, enterprise integrations, financial services or healthcare domain knowledge

Technologies

Python, TypeScript, Go, React

Responsibilities

Create feedback loops and evaluation systems for agent self-improvement; Design and ship long-horizon agents across multiple channels; Build reusable abstractions to accelerate future agent launches; Solve complex problems in orchestration, data, and observability; Define product architecture and roadmap; Translate prototypes into durable product capabilities

Seniority

Senior, hands-on IC