AI Context & Harness Engineer

Hercules

AI Context & Harness Engineer responsible for building AI coding agents and improving agent performance. Working with a team to explore novel optimizations using extensive data sources.

Posted 4/16/2026full-timeSan Francisco • California • 🇺🇸 United StatesSeniorLead💰 $100,000 - $250,000 per yearWebsite

Tech Stack

Tools & technologies

PostgresReactRedisTypeScript

About the role

Key responsibilities & impact

Build, maintain, and own Hercules' AI coding agent
Build, maintain, and own Hercules' online evals and offline evals
Research novel ways to improve agent performance using extensive data sources

Requirements

What you’ll need

Incredibly strong in software fundamentals: system design, architecture, data modeling, and API design
Experience with code quality and effectively working in monorepos
Proven track record of shipping features to customers
Strong experience in context and harness engineering best practices
Proficient with core stack: TypeScript, React, containers, Postgres, Redis, and Temporal
Capable of enhancing workflow with AI coding

Benefits

Comp & perks

Unlimited AI token budget
Take what you need vacation policy
Healthcare, vision, and dental
Daily lunches, dinners and snacks in the office
We guarantee you will do the best work of your career here

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

system designarchitecturedata modelingAPI designcode qualitymonoreposcontext engineeringharness engineering best practicesTypeScriptReact