AI Trainer. LLM Evaluator. Data Annotator.
Bruno Stivanin
AI Trainer | LLM Evaluator | Data Annotator
Mogi Guaçu, São Paulo, Brazil | +55 (19) 98196-9587 | bruno.stivanin@hotmail.com
LinkedIn: https://www.linkedin.com/in/bruno-stivanin
OpenTrain AI Profile: https://www.opentrain.ai/profile/bruno-s
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, Video, and Audio), RLHF, Fact-Checking, and Proofreading.
Language Proficiency
Portuguese (Native), English (Fluent), Spanish (Fluent), French (Elementary).
Work Experience
Data Annotator.
Latamways. Freelance. Nov 2025 – Present.
Mogi Guaçu, São Paulo, Brazil. Remote.
Review and annotate audio and video content.
Audio/Video Annotator.
Uber AI Solutions. Freelance. Nov 2025 – Present.
Mogi Guaçu, São Paulo, Brazil. Remote.
Annotate and label audio and video data.
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.
Online Tutor.
LatinHire. Freelance. Jul 2022 – Mar 2025.
Mogi Guaçu, São Paulo, Brazil. Remote.
Answered and proofread questions from various subjects.
Private English Teacher. Self-employed.
May 2017 – Mar 2025.
Mogi Guaçu, São Paulo, Brazil.
Provided private English lessons to students. Gained extensive experience in teaching English as a Second Language.
Administrative Intern.
SANASA Campinas. Sanitation Company. May 2012 – Dec 2012.
Campinas, São Paulo, Brazil.
Handled administrative tasks, including managing emails, documents, reports, and schedules. Scheduled activities for the Minha Escola na SANASA Program.
Education
Technical Course in Human Resources.
Senac Mogi Guaçu – SP – Brazil. 2017 – 2018.
MBA in Marketing Management.
ESAMC Campinas – Brazil. 2014 – 2015.
Bachelor’s in Business Administration (Emphasis on Foreign Trade).
PUC-Campinas – Brazil. 2008 – 2012.
I’m available up to 40 hours per week, part-time or full-time.