Software Engineer, Horizon
Sierra · San Francisco, CA
CHECKED 2H AGO
Applied AIonsite$230k–$390k
At a glance
Highlights
- Build long-horizon agents pursuing business outcomes over days or months.
- Create feedback loops, memory, and decisioning so agents learn and improve.
- Turn 0-to-1 prototypes into reusable platform systems for future agents.
What they offer
- Flexible (unlimited) paid time off
- Medical, dental, and vision benefits for you and your family
- Life insurance and disability benefits
- Retirement plan
- Parental leave
- Fertility and family building benefits through Carrot
- Lunch, snacks and coffee
- Discretionary benefit stipend
- Equity participation
- Free alphorn lessons
Ideal candidate
A high-agency builder who thrives in ambiguity and loves taking 0-to-1 ideas to production. You care about customer outcomes, craftsmanship, and turning hands-on work into durable platforms.
Requirements
- 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
- Builder's mindset with 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
- remote policy
- primarily in-person
Lab profile
About Sierra
Leading platform for customer-facing AI agents for global enterprise brands.
What they build
- Platform for customer-facing AI agents
Known for
- Enterprise customer service transformation
- Trusted by major global brands
- Voice AI and agent analytics
Key facts
- Headquartered in San Francisco
- Offices across North America, Europe, and Asia