Software Engineer, Horizon

The role

You will build primitives for self improvement and design long-horizon agents that pursue complex business outcomes. You will also build reusable systems and tools to turn zero-to-one work into a platform.

What you will do

• Create feedback loops, evaluation systems, memory, signals, and decisioning infrastructure.
• Design and ship agents that pursue complex business outcomes across voice, SMS, email, and other channels.
• Identify patterns and build reusable systems, abstractions, and tools.
• Build across orchestration, integrations, data, memory, signals, decisioning, observability, and multi-channel engagement.
• Work with product and engineering to define Horizon architecture and roadmap.
• Translate validated solutions into durable product capabilities.

Required qualifications

• Experience building and scaling end-to-end production systems.
• Strong platform and systems engineering fundamentals.
• Ability to move between customer problems, product design, and technical implementation.
• Strong technical judgment in ambiguous, fast-changing environments.
• A builder's mindset and 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.

Nice to have

• Experience as a founder, founding engineer, or early engineer at a startup.
• Experience building workflow, orchestration, event-driven, or distributed systems.
• Experience developing platforms or reusable infrastructure for other engineers.
• Experience building or deploying AI and LLM-powered products.
• Familiarity with enterprise integrations, APIs, data pipelines, and systems of record.
• Experience working in complex industries such as financial services or healthcare.

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.