Software Engineer, Agent Runtime

The role

You will build core systems that power agents, including the Agent SDK orchestration engine, runtime, and primitives. You will design agentic loops, improve retrieval and grounding, and build evaluation systems.

What you will do

• Build the core systems that power agents.
• Work on the Agent SDK orchestration engine, runtime, and primitives.
• Design the agentic loop.
• Define how agents operate in real-world environments.
• Improve retrieval and grounding.
• Build systems that ensure agents provide accurate, trustworthy responses.
• Build evaluation systems.
• Design frameworks to measure and improve agent quality.

Required qualifications

• Strong software engineering fundamentals and experience building production systems.
• Motivation and high-agency to drive outcomes in a high-autonomy culture.
• 4+ years hands-on experience building production products and systems.
• Degree in Computer Science or related field, or equivalent professional experience.

Nice to have

• Experience building AI-powered systems or agent frameworks.
• Experience with retrieval, evaluation systems, or LLM-based applications.
• Experience building developer platforms or SDKs.
• Experience with Go and Typescript.

Benefits

• Flexible (unlimited) paid time off
• Medical, dental, and vision benefits for you and your family
• Life insurance and disability benefits
• Retirement plan dependent on country of employment
• Parental leave
• Fertility and family building benefits
• Lunch, as well as delicious snacks and coffee when working onsite
• Discretionary benefit stipend
• Free alphorn lessons
• Equity plans for eligible full-time employees

About the company

Sierra is a platform for customer-facing AI agents working with brands like The GAP, Rocket Mortgage, SoFi, Sutter Health, and SoftBank. The company is primarily in-person based in San Francisco.