Professional fluency in Brazilian Portuguese and English
Experience building and scaling end-to-end production systems
Strong technical problem-solving skills in fast-changing environments
Builder's mindset with agency to overcome obstacles
Comfort interacting with customers to address their needs
Excellent communication skills for both technical and non-technical audiences
Responsibilities
Design and deliver production-grade AI agents driving revenue and reliability
Drive the entire Agent Development Life Cycle from pilot to deployment
Partner with large enterprises and innovative startups to solve business challenges
Build the future of the platform by prototyping new tools based on customer feedback
Facilitate design partnerships for new product initiatives
Experiment with voice models for enterprise integration
Benefits
Unlimited paid time off
Comprehensive medical, dental, and vision benefits
Life insurance and disability benefits
Retirement plan depending on employment country
Parental leave and fertility benefits through Carrot
Lunch, snacks, and coffee provided
Discretionary benefit stipend for personalized spending
Unique offering of free alphorn lessons
Full Job Description
What you'll do
Design and deliver production-grade AI agents: You'll build and ship highly performant, reliable, and intuitive AI agents that are central, mission-critical and drive revenue directly to Sierra's growth. These aren't prototypes-they are powerful, scalable systems running in production environments across industries like finance, healthcare, and commerce.
Drive the Agent Development Life Cycle (ADLC): You'll have complete ownership and autonomy from initial pilot through deployment and continuous iteration. You'll be responsible for building, tuning, and evolving AI agents in production environments, defining the standard for ADLC best practices along the way.
Partner with large enterprises and cutting-edge startups: You'll work directly with leaders at some of the world's largest enterprises to understand their most pressing business challenges, and build AI agents that transform how they operate at scale. You'll also partner with the most cutting-edge startups in Silicon Valley, embedding AI agents across their entire business stack to drive innovation and efficiency.
Build the future of the platform: Your direct work with customers will guide the evolution of Sierra's core platform. You'll surface unmet needs, prototype new tools and features, and collaborate with research, product, and platform to shape the future of AI agent development and Sierra's product.
Example projects
These are some examples of projects that engineers on our team have worked on recently:
Design and build AI agents for large telecommunications and media companies that consistently outperform human agents in managing subscription churn
Develop and refine AI agents capable of navigating complex customer interactions, like troubleshooting a broken device and personalizing product recommendations
Create generalizable AI agent frameworks tailored for industry-specific use cases. See some examples in our financial services blog!
Facilitate design partnerships for new product initiatives, such as new agent architectures, self-service capabilities, and generative agent development
Experiment with the latest voice models and figure out how to integrate them at scale to enterprise-grade customers
What you'll bring
Language fluency - professional fluency in both Brazilian Portuguese and English
Experience building and scaling end-to-end production systems
Strong technical problem-solving skills, especially in fast-changing, ambiguous environments
A builder and tinkerer's mindset with high agency - you find creative ways to overcome obstacles and ship
Comfort working directly with customers to understand their needs and solve real-world problems
Excellent communication skills - clear, direct, and persuasive across technical and non-technical audiences
Even better...
Experience building or deploying AI/LLM systems in production
Have been a founder or founding engineer - you know what it means to balance craft, ownership, and speed
Familiarity with tools that power today's AI agents: eval frameworks, agent tooling, RAG pipelines, and prompt engineering
Prior experience with React, TypeScript, and/or Go
Previous roles where you interfaced with customers or led technical projects with external stakeholders
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
About Sierra Club
The Sierra Club is a nonprofit organization that promotes environmental conservation. It was founded in 1892 by John Muir and is one of the oldest and largest environmental organizations in the United States. The organization has over 3.8 million members and supporters and is dedicated to protecting the planet's natural resources and wildlife. The Sierra Club engages in a variety of activities, including lobbying for environmental legislation, organizing outdoor activities, and publishing a magazine. The organization is headquartered in Oakland, California.
