Software Engineer, Horizon
$230k - $390k • San Francisco, CA • FullTime
Posted 8h ago
Job Location
San Francisco, CA
Tech Stack
Remote Work Policy
On-site
Employment Type
FullTime
Categories
AI Agent Engineer
About the job
Sierra is a leading platform for customer-facing AI agents, transforming how businesses serve customers and grow. We are seeking a Software Engineer to join our Horizon team, focusing on building advanced AI agents capable of complex, long-horizon tasks across multiple communication channels. This role involves developing core agent capabilities, creating reusable systems and abstractions, and shaping the future of our AI product. You will tackle technically challenging problems in orchestration, integrations, data, memory, and observability, translating validated solutions into durable product features.
Responsibilities
- Build primitives for self-improvement in AI agents, including feedback loops, evaluation systems, memory, signals, and decisioning infrastructure.
- Design and ship long-horizon AI agents that pursue complex business outcomes over extended periods across voice, SMS, email, and other channels.
- Develop reusable systems, abstractions, and tools to accelerate the launch of future AI agents.
- Solve complex technical problems related to orchestration, integrations, data, memory, signals, decisioning, observability, and multi-channel engagement.
- Shape the Horizon product by identifying platform gaps and contributing to architecture and roadmap definition.
- Translate validated solutions into durable product capabilities and ensure successful handoff for continued deployment.
Requirements
- Experience building and scaling end-to-end production systems.
- Strong platform and systems engineering fundamentals.
- Ability to bridge customer problems, product design, and technical implementation.
- Strong technical judgment in ambiguous, fast-changing environments.
- A builder's mindset with the ability to take products from zero to one.
- Comfort working directly with customers and understanding complex business processes.
- High agency, adaptability, and clear communication.
- At least two years of professional software engineering experience.
- Experience with Python, TypeScript, or Go and React.
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, snacks, and coffee
- Discretionary benefit stipend
- Free alphorn lessons
- Equity plans