Remote in Brazil+1 moreMore locations: São Paulo, State of São Paulo, Brazil
Remote
Software EngineeringAI Application Engineering
About the job
Requirements
Experience building and shipping products with large language models, demonstrated through work experience, personal projects, or open source.
Experience with prompt engineering, retrieval-augmented generation, and agentic patterns.
Experience building evaluations for large-language-model-powered products.
Experience leading the technical direction of products, formally or informally, such as through technical leadership, mentoring, or end-to-end project ownership.
Ability to work effectively with product, design, and other partners.
Ability to contribute to multiple projects at the same time.
Comfort communicating in English, both written and verbal.
Python experience, such as with FastAPI, or TypeScript experience is nice to have.
Responsibilities
Lead engineering for one or more artificial intelligence initiatives.
Architect the technology stack and prompt engineer large language models to solve real-world problems.
Work closely with product managers, designers, and other engineers to take products from idea to production.
Build a minimum viable product with a startup founder for client projects.
Build internal artificial intelligence tools to transform company workflows.
Help grow the team and interview future candidates.
Mentor other engineers to support their development.
Contribute to creating the company culture as an early employee.
Desired Qualifications
Experience fine-tuning large language models.
Use artificial intelligence tools such as Cursor and Claude Code to improve coding workflows.
Lead AI Engineer
🏔️ About Sierra Studio
Sierra Studio is an AI engineering studio and startup incubator – we turn our customers' ideas into reality! We're based in Los Angeles, but our teammates live all around the world. We create products across all areas of software — from web and mobile apps to cutting-edge work at the forefront of AI and large language models.
💼 About The Role
As a Lead AI Engineer, you'll lead engineering for one or more AI initiatives at Sierra. You'll architect the stack, prompt engineer LLMs to solve real world problems, and work with your teammates to ship great products you're proud of. You'll work closely with product managers, designers, and other engineers to take products from idea to production. As an early employee at a startup, you'll also be part of creating our culture!
Here's a taste of what you could do at Sierra!
Client projects: Work with a startup founder to build the MVP of their idea
Internal projects: Build an internal AI tool to transform our own workflows
Hiring: Help us grow our team and interview future candidates
Leadership: Mentor other engineers to level up our team
🔎 Who We're Looking For
We're looking for a lead engineer who has experience building great products with LLMs. Work experience, personal projects, or open source — any way you've built things counts.
If you're excited about this role but don't check every box, we'd love to see your application anyway.
✨ LLMs & AI
You've shipped something real with LLMs — at work, in a project, or in study
Experience with prompt engineering, RAG, and agentic patterns
Experience building evals for LLM-powered products
Growth mindset: Ability to quickly learn new skills in the AI space
🧑🚀 Leadership
Experience leading the technical direction of products — formally or informally (tech lead, mentoring, owning a project end-to-end)
Ability to work effectively with product, design, and other partners
Ability to contribute to multiple projects at the same time
Comfortable communicating in English, written and verbal (our clients are US-based)
💻 Software engineering
Backend: Either Python (e.g. FastAPI) or TypeScript experience is nice to have!
🔥 Bonus skills – nice to have!
Experience with finetuning LLMs
Curiosity about new developments in AI
Uses AI tools (Cursor, Claude Code, etc) to supercharge your own coding workflow
🌎 How We Work
Fully remote, with flexible hours — we care about output, not hours online. We support work-life balance for teammates at every life stage.
💖 Our culture
Growth mindset: We look to magnify our strengths, take chances, and always learn from our mistakes.
Supportive: We keep our egos out of the workplace and support each other when trying new things.
Product & customer centric: We care deeply about our customers and clients and always keep their needs top of mind. We build tech to solve real problems.
Ownership: We take initiative, even when it is "not our job." As a startup, we all wear lots of hats.
💡 Why join us?
At Sierra Studio, we believe in nurturing talent and creating good vibes at work. We seek inclusion and embrace our differences. We're all about "growth mindset", and we look to magnify our strengths, take chances, and always learn from our mistakes. We don't fit our teammates into boxes, and instead we understand that each person has their own unique set of skills that they bring to the table. If you join us, we'll embrace who you are today, and give you the space and tools to keep growing.
Salary Range: $60,000 - $100,000 annually.
Your exact compensation will be determined based on a variety of factors that reflect your individual qualifications and how they align with the needs of the role.