Staff Software Engineer, AI Agent

About the role

Hercules is looking for a senior or staff level AI Context & Harness engineer to help us build the future of AI software development.

Responsibilities

• Build, maintain, and own Hercules' AI coding agent
• Build, maintain, and own Hercules' online evals and offline evals
• Research novel ways to make our agent cheaper, faster, and more accurate (you will have access to 1M+ repos and millions of chat messages)

Skills

• Software fundamentals: system design, architecture, data modeling, and API design
• Code and codebase quality: write clean, maintainable code; work effectively in monorepos
• Product/design sense: track record of independently shipping lots of features to customers
• Context and harness engineering skills: strong experience with up‑to‑date best practices such as summarization/compression, prompting, prompt caching, subagents, memory, dreaming, context management, tools, async tools, deferred tools, RAG, skills, etc.
• Familiarity with Hercules core stack: TypeScript, React, containers, Postgres, Redis, Temporal
• Ability to leverage AI coding to 10× your workflow by staying on the frontier of AI coding

Benefits

• 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

Pay

$100k‑$350k + equity (variable based on seniority, equity, and location)

Schedule

Hercules founding team works in‑office in San Francisco (Kearny and Bush). Strong preference for in‑office; open to remote for exceptional candidates who are willing to work in US time zones and travel to the office regularly.