Frontend Engineer – AI Developer Tools

LATAM Frontend Engineer – AI Developer Tools

Location: São Paulo, Brazil (Hybrid)

Employment: Full-Time

Compensation: $5,000–$6,000 USD/month

Experience: 3–6 years

FitNext Exclusive: No

We're partnering with a fast-growing, venture-backed AI startup building the next generation of enterprise software. The company is looking for a Frontend Engineer to build intuitive, high-performance interfaces that help enterprise teams navigate complex workflows and work alongside AI agents.

Company Overview

This Series A startup is building an AI-powered operating system for enterprise transformation projects, helping teams coordinate complex workflows, capture institutional knowledge, and automate repetitive processes.

The company has raised $21M and surpassed $3M in annual recurring revenue within its first 11 months. Its platform is already deployed by major global consulting and technology firms.

With a team spanning San Francisco and São Paulo, the company offers the opportunity to work closely with experienced engineers and designers while building impactful products at the intersection of AI and enterprise software.

The Challenge

We're looking for a mid-level Frontend Engineer to build the interfaces that enterprise consultants use to navigate complex projects and interact with AI agents.

This is a pure frontend role focused on React, Next.js, and TypeScript, with no backend ownership. You'll work closely with design, engineering, and customers to turn complex workflows into clear, intuitive, and reliable product experiences.

What You'll Do

• Own frontend features from discovery and implementation through deployment and iteration.
• Build interactive interfaces that help users navigate complex workflows and work with AI agents.
• Make thoughtful decisions around UI state, data flow, loading strategies, and component architecture.
• Improve frontend performance, responsiveness, accessibility, and reliability.
• Build reusable components and contribute to shared design systems and frontend foundations.
• Collaborate with designers, engineers, and customers to identify friction and improve the user experience.
• Use customer feedback, analytics, performance monitoring, and session replays to measure impact.
• Leverage AI-assisted development tools while maintaining high standards for code quality and simplicity.

Must-Have Requirements

• 3–6 years of professional experience building and maintaining complex, interactive production applications using React and Next.js.
• Strong knowledge of JavaScript, TypeScript, HTML, and CSS.
• Solid understanding of browser behavior, rendering, state management, and asynchronous data flows.
• Strong UX judgment and the ability to build intuitive experiences beyond simply making features work.
• Experience using customer feedback and product data to identify usability issues and improve performance.
• Professional English proficiency at C1/C2 level, both spoken and written.
• Ability to work in a hybrid setup in São Paulo, Brazil.

Nice to Have

• Experience working with Figma.
• Experience building AI-powered interfaces where users review, guide, or approve AI agent actions.
• Experience evolving component libraries or design systems.
• Familiarity with enterprise platforms such as SAP, Salesforce, ERP, or CRM systems.

Benefits & Perks

• Lunch on office days.
• Gym benefit.
• Free coffee at the office.

Interview Process

1. Application Review
2. Initial Phone Screen
3. Technical Interview
4. Culture Fit Interview
5. Take-Home Assignment
6. Work Trial
7. Offer