Abaka AI, RWS Group, Alignerr, Translated, Outlier. Freelance AI Trainer and Data Annotator.

Member since 23 June 2025

Website: https://www.opentrain.ai/profile/bruno-s

Linked-In: https://www.linkedin.com/in/bruno-stivanin

E-mail: bruno.stivanin@hotmail.com

Country: Brazil

Professional Summary
I’m an AI Trainer and Data Annotator specializing in Brazilian Portuguese, with experience in training, evaluating, and annotating AI models to improve text quality. I also have a solid foundation in education, having worked as an English Teacher and Online Tutor.

Core Competencies
AI & LLM Evaluation (English & Brazilian Portuguese), Data Annotation (Text, Image, Audio), RLHF, Fact-Checking, and Proofreading.

Work Experience
Data Annotator/AI Trainer.
Abaka AI. Freelance. Oct 2025 – Present.
Mogi Guaçu, São Paulo, Brazil. Remote.
Annotate and evaluate image, video, and audio data to support AI model training and improvement.

Data Annotator.
RWS Group. Freelance. Sep 2025 – Present.
Mogi Guaçu, São Paulo, Brazil. Remote.
Annotate data accurately, provide feedback on patterns, and ensure quality and consistency throughout the process.

AI Trainer for Portuguese.
Alignerr. Freelance. Jan 2025 – Present.
Mogi Guaçu, São Paulo, Brazil. Remote.
Provide remote AI training for Portuguese language models, specializing in Artificial Intelligence (AI) evaluation to enhance model performance.

AI Evaluator.
Translated. Freelance. Nov 2024 – Present.
Mogi Guaçu, São Paulo, Brazil. Remote.
Conduct remote AI evaluation tasks, focusing on improving AI models.

Remote Brazilian Portuguese Writer for AI Training.
Outlier. Freelance. Jun 2024 – Present.
Mogi Guaçu, São Paulo, Brazil. Remote.
Train and evaluate AI models to enhance their ability to generate high-quality Brazilian Portuguese text, contributing to data integrity and data entry processes.

Listings by Abaka AI, RWS Group, Alignerr, Translated, Outlier. Freelance AI Trainer and Data Annotator.

Listings by Abaka AI, RWS Group, Alignerr, Translated, Outlier. Freelance AI Trainer and Data Annotator.

Abaka AI, RWS Group, Alignerr, Translated, Outlier. Freelance AI Trainer and Data Annotator.

AI Trainer. LLM Evaluator. Data Annotator.

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