← All roles

Software Engineer, Agent Runtime

Sierra· Engineering
Apply on company site
San Francisco, CA$230k - $390kFull-timePosted 7mo ago

About the role

Software Engineer role focused on building core systems, agent runtime, and SDK for agent orchestration and grounding in an on-site SF office.

Responsibilities

  • Build the core systems that power agents. You’ll work on the Agent SDK — the orchestration engine, runtime, and primitives that define how agents reason, take actions, and interact with users and systems.
  • Design the agentic loop. What primitives do we need to build agents that are steerable and verifiable, while still conversational and adaptive? You’ll help define how agents operate in real-world environments.
  • Improve retrieval and grounding. You’ll build systems that ensure agents provide accurate, trustworthy responses by effectively retrieving and using knowledge.
  • Build evaluation systems. You’ll design frameworks that allow us and our customers to measure and improve agent quality over time.

Qualifications

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

Skills

Required:Production-grade software engineering
Nice to have:GoTypescriptAI/Agent frameworksRetrieval/evaluation systems

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 through Carrot
  • Lunch, as well as delicious snacks and coffee to keep you energized
  • Discretionary benefit stipend giving people the ability to spend where it matters most
  • Free alphorn lessons
Last updated Sep 16, 2026. Interested? Apply on the company site.
Sierra logo

About Sierra

Better customer experiences. Built on Sierra.

Sierra helps businesses build better, more human customer experiences with AI.

AICustomer ExperienceCustomer SupportVoiceai-agents-and-applicationsorchestrationvoice-ai-stackwing-list-2026
Company profileWebsite

More open roles at Sierra