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Staff Software Engineer, AI Agent

herculesSan FranciscoEngineering
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Salary
$100K – $350K
Job type
Full-time
Work mode
Remote
Experience
Senior
Posted
4 Oct 2026
Status
Open · checked 9d ago

About this role

Staff Software Engineer, AI Agent is an in-office or remote role at Hercules located in San Francisco that suits senior or staff level engineers with strong context and harness engineering experience. This position involves developing and improving artificial intelligence coding agents and evaluation systems.

Role Overview

Hercules is seeking a Staff Software Engineer, AI Agent to join the team in San Francisco or remotely for candidates willing to work in US time zones and travel to the office regularly. The position focuses on shaping the future of artificial intelligence software development by managing evaluation pipelines and coding agents.

Key Responsibilities

Build, maintain, and own the artificial intelligence coding agent
Build, maintain, and own online and offline evaluations
Research novel methods to improve agent speed, cost-efficiency, and accuracy

Requirements

Strong foundation in system design, architecture, data modeling, and application programming interface design
Ability to write clean, maintainable code and work effectively in monorepos
Demonstrated track record of independently shipping features to users
Experience with context and harness engineering practices including summarization, compression, prompting, prompt caching, subagents, memory, retrieval-augmented generation, and tools
Familiarity with frontier artificial intelligence coding workflows

Skills and Tools

TypeScript, React, AI SDK, Postgres, Redis, Clickhouse, Tailwind, IaC, CDK, Terraform, Docker, Otel, Hono, Drizzle ORM, Temporal
Cloudflare, AWS
OpenAI, Anthropic, Google models

Salary and Benefits

Compensation ranges from $100,000 to $350,000 with equity
Unlimited artificial intelligence token budget
Take what you need vacation policy
Healthcare, vision, and dental coverage
Daily lunches, dinners, and snacks provided in the office

About the Company

Hercules operates based on principles that prioritize rapid shipping, iterative learning, high standards of execution, and strong determination to achieve desired outcomes. The founding team is based in San Francisco near Kearny and Bush.

How to Apply

Candidates should apply on the official company careers page.

Skills and tech stack

Questions candidates ask

Where is the job located?

The role is primarily in-office in San Francisco at Kearny and Bush, though remote work is considered for exceptional candidates who operate in US time zones and travel to the office regularly.

What is the salary range and equity offering?

The compensation ranges from $100,000 to $350,000 with equity, varying based on seniority, equity, and location.

What technical stack does the engineering team use?

The stack includes TypeScript, React, AI SDK, Postgres, Redis, Clickhouse, Tailwind, CDK, Terraform, Docker, Otel, Hono, Drizzle ORM, Temporal, Cloudflare, AWS, and models from OpenAI, Anthropic, and Google.

What benefits are included?

Benefits include healthcare, vision, dental, an unlimited artificial intelligence token budget, a flexible vacation policy, and daily meals and snacks at the office.

Ready to apply?

The application is on the official hercules careers page.

Apply on company site