Software Engineer, Horizon
Sierra · San Francisco, CA
Applied AIonsite$230k–$390k
At a glance
Highlights
- Build long-horizon AI agents pursuing business outcomes over weeks or months.
- Create feedback loops and systems helping agents learn from outcomes.
- Ship agents across voice, SMS, email and turn wins into reusable platform.
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 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 for eligible full-time employees
Ideal candidate
You’re a high-agency 0-to-1 builder energized by ambiguity and customer impact. You care about craftsmanship, move fast between problem and product, and want to shape long-running agents.
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
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