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101 of 472 matching · page 2 of 3

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TypeAgent infrastructure126 Agent engineering153 Developer tooling2 Applied research11 Forward deployed179 Other1

ModeRemote92 Hybrid95 On-site72 Location TBD213

LevelJunior18 Mid-level101 Senior216 Staff26 Principal17 Lead20 Manager18 Level TBD56

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101 of 472 matching · page 2 of 3

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Agent engineeringMid-levelTop pickNew

Software Engineer, Horizon

SierraSan Francisco, CA, USA (On-site)

Posted 1d ago/Full-time/$230k–$390k/yr/Expires Nov 10, 2026

Apply on company site Original posting

Why it matters

Ownership of self-improvement primitives for agents, feedback loops, evals, memory and decisioning, plus orchestration and observability for agents running across voice, SMS and email over weeks. Work spans 0-to-1 customer deployments and turning them into platform abstractions, at a company shipping agents to large enterprises.

About the job

ABOUT US

Sierra is the leading platform for customer-facing AI agents, working with many of the world's biggest brands — including The GAP, Rocket Mortgage, SoFi, Sutter Health, and SoftBank — to transform how they serve customers and grow their businesses. We are primarily an in-person company based in San Francisco, with growing offices across North America, Europe, and Asia.

We are guided by a set of values that are at the core of our actions and define our culture: Trust, Customer Obsession, Craftsmanship, Intensity, and a commitment to balancing Family along the way. These values are the foundation of our work, and we are committed to upholding them in everything we do.

Our co-founders are Bret Taylor https://www.linkedin.com/in/brettaylor/ and Clay Bavor https://www.linkedin.com/in/claybavor/. Bret currently serves as Board Chair of OpenAI. Previously, he was co-CEO of Salesforce (which had acquired the company he founded, Quip) and CTO of Facebook. Bret was also one of Google's earliest product managers and co-creator of Google Maps. Before founding Sierra, Clay spent 18 years at Google, where he most recently led Google Labs. Earlier, he started and led Google’s AR/VR effort, Project Starline, and Google Lens. Before that, Clay led the product and design teams for Google Workspace.

What you’ll do

Build primitives for self improvement: Create the feedback loops, evaluation systems, memory, signals, and decisioning infrastructure that help long-running agents 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 make future Horizon agents faster and easier to launch.
Solve technically complex problems: Build across orchestration, integrations, data, memory, signals, decisioning, observability, and multi-channel engagement.
Shape the Horizon product: Surface platform gaps through hands-on implementation and work with product and engineering to define Horizon’s architecture and roadmap.
Create a clean path beyond the POC: Once a solution is validated, translate what you built into durable product capabilities and enable a successful handoff for continued deployment.

What you’ll bring

Experience building and scaling end-to-end production systems.
Strong platform and systems engineering fundamentals.
The 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.

Even better

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.

OUR VALUES

Trust: We build trust with our customers with our accountability, empathy, quality, and responsiveness. We build trust in AI by making it more accessible, safe, and useful. We build trust with each other by showing up for each other professionally and personally, creating an environment that enables all of us to do our best work.
Customer Obsession: We deeply understand our customers’ business goals and relentlessly focus on driving outcomes, not just technical milestones. Everyone at the company knows and spends time with our customers. When our customer is having an issue, we drop everything and fix it.
Craftsmanship: We get the details right, from the words on the page to the system architecture. We have good taste. When we notice something isn’t right, we take the time to fix it. We are proud of the products we produce. We continuously self-reflect to continuously self-improve.
Intensity: We know we don’t have the luxury of patience. We play to win. We care about our product being the best, and when it isn’t, we fix it. When we fail, we talk about it openly and without blame so we succeed the next time.
Family: We know that balance and intensity are compatible, and we model it in our actions and processes. We are the best technology company for parents. We support and respect each other and celebrate each other’s personal and professional achievements.

WHAT WE OFFER

We want our benefits to reflect our values and offer the following to full-time employees:

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, as well as delicious snacks and coffee to keep you energized
Discretionary benefit stipend giving people the ability to spend where it matters most
Free alphorn lessons

These benefits are further detailed in Sierra's policies, may vary by region, and are subject to change at any time, consistent with the terms of any applicable compensation or benefits plans. Eligible full-time employees can participate in Sierra's equity plans subject to the terms of the applicable plans and policies.

BE YOU, WITH US

We're working to bring the transformative power of AI to every organization in the world. To do so, it is important to us that [truncated]

Stack

python
typescript
go
react

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