SlipstreamJobs tracks this role from the company's public career site. Apply directly on the employer's site.
Sierra is a leading platform for customer-facing AI agents, serving major brands including The GAP, Rocket Mortgage, SoFi, Sutter Health, and SoftBank. The company is founded by Bret Taylor (former co-CEO of Salesforce, CTO of Facebook, Google Maps co-creator) and Clay Bavor (18 years at Google, led Google Labs and Project Starline).
In this Software Engineer role on the Horizon team, you will:
- Build primitives for self-improvement: Create feedback loops, evaluation systems, memory, signals, and decisioning infrastructure that enable long-running agents to learn from outcomes and improve over time.
- Build the future of long-horizon agents: Design and ship agents that pursue complex business outcomes over days, weeks, or months across voice, SMS, email, and other channels.
- Turn 0-to-1 work into a platform: Identify patterns and build reusable systems, abstractions, and tools that accelerate future Horizon agent launches.
- Solve technically complex problems: Work across orchestration, integrations, data, memory, signals, decisioning, observability, and multi-channel engagement.
- Shape the Horizon product: Surface platform gaps through hands-on implementation and collaborate with product and engineering to define architecture and roadmap.
- Create a clean path beyond the POC: Translate validated solutions into durable product capabilities and enable successful handoff for continued deployment.
You will work directly with customers, understand complex business processes, and move fluidly between customer problems, product design, and technical implementation. The role emphasizes high agency, adaptability, and clear communication in a fast-moving environment.
REQUIREMENTS:
- At least two years of professional software engineering experience
- Experience building and scaling end-to-end production systems
- Strong platform and systems engineering fundamentals
- Proficiency with Python, TypeScript, or Go and React
- Strong technical judgment in ambiguous, fast-changing environments
- Builder's mindset and ability to take products from zero to one
- Comfort working directly with customers and understanding complex business processes
PREFERRED QUALIFICATIONS:
- 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
