Software Engineer, Agent (Brazilian Portuguese speaking)

The role

You will design and deliver production-grade AI agents. You will drive the Agent Development Life Cycle and partner with large enterprises and startups to build AI agents that transform how they operate.

What you will do

• Design and deliver production-grade AI agents
• Drive the Agent Development Life Cycle from pilot through deployment and continuous iteration
• Build, tune, and evolve AI agents in production environments
• Partner with large enterprises and startups to understand business challenges
• Build the future of the platform by surfacing unmet needs and prototyping new tools
• Collaborate with research, product, and platform to shape the product

Required qualifications

• Professional fluency in both Brazilian Portuguese and English
• Experience building and scaling end-to-end production systems
• Strong technical problem-solving skills in fast-changing, ambiguous environments
• A builder and tinkerer’s mindset with high agency
• Comfort working directly with customers to understand needs and solve problems
• Excellent communication skills across technical and non-technical audiences

Nice to have

• Experience building or deploying AI/LLM systems in production
• Experience as a founder or founding engineer
• Familiarity with eval frameworks, agent tooling, RAG pipelines, and prompt engineering
• Prior experience with React, TypeScript, and/or Go
• Previous roles interfacing with customers or leading technical projects with external stakeholders

Benefits

• 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
• Lunch, snacks, and coffee when working onsite
• Discretionary benefit stipend
• Free alphorn lessons
• Equity plans for eligible full-time employees

About the company

Sierra is a platform for customer-facing AI agents working with large brands. It is an in-person company based in San Francisco.