Frontend Engineer – AI Developer Tools

Please, follow FitNext LinkedIn page: https://www.linkedin.com/company/fitnext-consulting/ *

Following

LinkedIn URL profile *

GitHub / personal website / portfolio link?

Country of residence *

What is your expected rate per month in USD? *

English Level *

A1: Beginner
A2: Basic
B1: Intermediate
B2: Advanced Intermediate
C1: Advanced
C2: Proficient

Do you have hands-on experience with AI? If yes, please briefly describe it *

Do you have any international experience? If so, with which company? *

What is your availability to start work? *

How many years of professional experience do you have building production applications with React and Next.js? *

How would you rate your experience with TypeScript and modern frontend development? *

Advanced — I have built and maintained complex production applications.
Intermediate — I have solid experience building frontend features.
Basic — I have limited professional experience.

Have you built interfaces for AI-powered products where users review, guide, or approve AI-generated actions? *

Yes, in a production environment.
Yes, in a prototype or side project.
No, but I have experience building complex interactive applications.
No experience with either.

If yes, briefly describe the interface you built, how you handled errors or partial results, and what you improved based on real user feedback.

Are you currently based in São Paulo, Brazil, and available to work in a hybrid setup? *

Yes, I live in São Paulo and can work hybrid.
I live nearby and can commute to São Paulo.
No, but I am willing to relocate.
No, I cannot work in a hybrid setup in São Paulo.

Are you interested in participating in AI training projects, such as evaluating AI-generated code, reviewing model outputs, or providing feedback to improve AI systems? *

Yes
Maybe, depending on the project
No

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