Software Engineer, Horizon

Salary: $211,000 - 251,000 per year Requirements:

• Experience building and scaling end-to-end production systems
• Strong platform and systems engineering fundamentals
• Ability to work across customer problems, product design, and technical implementation
• Strong technical judgment in ambiguous, fast-changing environments
• Builders mindset and 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
• Ideally, experience as a founder, founding engineer, or early engineer at a startup
• Ideally, experience with workflow, orchestration, event-driven, or distributed systems
• Ideally, experience developing platforms or reusable infrastructure for other engineers
• Ideally, experience building or deploying AI- and LLM-powered products
• Ideally, familiarity with enterprise integrations, APIs, data pipelines, and systems of record
• Ideally, experience in complex industries such as financial services or healthcare

• Build feedback loops, evaluation systems, memory, signals, and decision-making infrastructure so long-running agents can learn from outcomes and improve
• Design and ship agents that pursue complex business outcomes over days, weeks, or months across voice, SMS, email, and other channels
• Turn early-stage work into reusable systems, abstractions, and tools that help launch future Horizon agents more efficiently
• Develop solutions across orchestration, integrations, data, memory, signals, decision-making, observability, and multichannel engagement
• Identify platform gaps through hands-on implementation and collaborate with product and engineering teams on Horizons architecture and roadmap
• Convert validated solutions into durable product capabilities and support a successful handoff for continued deployment

• AI
• AI Agents
• Support
• LLM
• Python
• React
• Salesforce
• TypeScript
• CTO
• VR

More:

We are Sierra, a platform for customer-facing AI agents, partnering with organizations including The GAP, Rocket Mortgage, SoFi, Sutter Health, and SoftBank to transform customer service and business growth. We are primarily an in-person company based in San Francisco, with offices across North America, Europe, and Asia. Our co-founders are Bret Taylor and Clay Bavor, whose backgrounds include leadership roles at OpenAI, Salesforce, Facebook, and Google. Our culture is grounded in trust, customer obsession, craftsmanship, intensity, and family, and we aim to bring AIs transformative potential to organizations around the world. We offer full-time employees flexible paid time off; medical, dental, and vision coverage for employees and families; life insurance and disability benefits; a retirement plan based on country of employment; parental leave; fertility and family-building support; lunch, snacks, and coffee; a discretionary benefit stipend; and alphorn lessons. Eligible full-time employees may participate in equity plans. Benefits vary by region and are subject to applicable policies and plans. We value diverse experiences and encourage applicants to apply even if their background does not match every part of the role; we assess applicants consistently and without regard to legally protected characteristics.

last updated 41 week of 2026