For employers

Hire this AI Trainer

Sign in or create an account to invite AI Trainers to your job.

LoginCreate account
Invite to Job
C
Caio Renczakowski

Caio Renczakowski

Multilingual & Multimodal AI Trainer

Argentina flagBuenos Aires, Argentina
$65.00/hrExpertMicro1OtherAppen

Key Skills

Software

Micro1
Other
AppenAppen
ClickworkerClickworker
LabelboxLabelbox
LionbridgeLionbridge
MercorMercor
MindriftMindrift
OneFormaOneForma
RemotasksRemotasks
Scale AIScale AI
SuperAnnotateSuperAnnotate
TolokaToloka

Top Subject Matter

Multilingual Language Modeling
Multimodal AI (Text, Audio, Image, Video)
Sustainability Data

Top Data Types

TextText
DocumentDocument
VideoVideo
AudioAudio

Top Task Types

Data CollectionData Collection
Bounding BoxBounding Box
SegmentationSegmentation
Text GenerationText Generation
Object DetectionObject Detection
Question AnsweringQuestion Answering
Text SummarizationText Summarization
RLHFRLHF
Fine-tuningFine-tuning
Red TeamingRed Teaming
TranscriptionTranscription
Evaluation/RatingEvaluation/Rating
Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)

Freelancer Overview

Linguistic & Multimodal AI Training Expert with experience in working and reviewing a vast amount of AI training projects in English, Portuguese, and Spanish for worldwide companies such as xAI and Micro1.

ExpertEnglishPortugueseSpanish

Labeling Experience

Linguistic AI Training Expert - Micro1

Micro1VideoTranscription
As a Linguistic AI Training Expert at Micro1, I worked on multilingual projects to refine and train world-class AI models. The primary focus was improving language understanding and output across English, Spanish, and Portuguese. I evaluated, rated, and provided feedback on AI responses in multiple languages. • Conducted quality review and feedback sessions for AI linguistic models • Ensured cultural and contextual accuracy for multilingual data • Collaborated with developers to iterate AI model improvements • Specialized in English, Spanish, and Portuguese projects

As a Linguistic AI Training Expert at Micro1, I worked on multilingual projects to refine and train world-class AI models. The primary focus was improving language understanding and output across English, Spanish, and Portuguese. I evaluated, rated, and provided feedback on AI responses in multiple languages. • Conducted quality review and feedback sessions for AI linguistic models • Ensured cultural and contextual accuracy for multilingual data • Collaborated with developers to iterate AI model improvements • Specialized in English, Spanish, and Portuguese projects

2026 - Present

AI Tutor - xAI

OtherTextRLHF
As an AI Tutor at xAI, I was responsible for a variety of AI training projects. Projects included data filtering, refinement, and evaluation for text, audio, images, and videos to train Grok. I utilized my multilingual skills to assess and enhance AI performance in English, Portuguese, and Spanish. • Conducted evaluations on AI-generated outputs in various formats • Filtered and labeled content for model training datasets • Ensured data quality and relevance for model fine-tuning • Collaborated with cross-functional AI teams

As an AI Tutor at xAI, I was responsible for a variety of AI training projects. Projects included data filtering, refinement, and evaluation for text, audio, images, and videos to train Grok. I utilized my multilingual skills to assess and enhance AI performance in English, Portuguese, and Spanish. • Conducted evaluations on AI-generated outputs in various formats • Filtered and labeled content for model training datasets • Ensured data quality and relevance for model fine-tuning • Collaborated with cross-functional AI teams

2024 - 2025

AI Trainer - UHRS

OtherTextRLHF
As an AI Trainer at UHRS, I participated in various AI evaluation and training projects. Tasks included rating AI responses and relevance on topics such as Geography, News, and Biology. My feedback contributed to iterative improvements in AI accuracy and subject matter relevance. • Evaluated AI-generated content for factual accuracy • Rated AI understanding in diverse subject areas • Provided iterative feedback to improve AI models • Worked across multiple scientific and general topics

As an AI Trainer at UHRS, I participated in various AI evaluation and training projects. Tasks included rating AI responses and relevance on topics such as Geography, News, and Biology. My feedback contributed to iterative improvements in AI accuracy and subject matter relevance. • Evaluated AI-generated content for factual accuracy • Rated AI understanding in diverse subject areas • Provided iterative feedback to improve AI models • Worked across multiple scientific and general topics

2023 - 2024

Data Analyst & Annotator - Datacie

OtherDocumentData Collection
At Datacie, I worked as a Data Analyst & Annotator focusing on sustainability reports. Extracted and structured information related to carbon emissions, water usage, and energy expenditure from annual reports. The labeled data was used for comparative environmental impact analyses. • Gathered and annotated structured data from PDF documents • Standardized environmental data for analytics • Built environmental impact databases • Collaborated with environmental science teams

At Datacie, I worked as a Data Analyst & Annotator focusing on sustainability reports. Extracted and structured information related to carbon emissions, water usage, and energy expenditure from annual reports. The labeled data was used for comparative environmental impact analyses. • Gathered and annotated structured data from PDF documents • Standardized environmental data for analytics • Built environmental impact databases • Collaborated with environmental science teams

2023 - 2024

Translator and Captioner of videos - TEDx

OtherVideoTranscription
At TEDx, I volunteered as a Translator and Captioner, localizing video content for AI training and accessibility. Created and synchronized captions in Portuguese and Spanish for a range of English-language videos. Focused on preserving context and meaning in audiovisual translations. • Produced accurate video captions for AI dataset enrichment • Maintained linguistic consistency across translated content • Structured subtitles for machine learning consumption • Participated in quality assurance of localized datasets

At TEDx, I volunteered as a Translator and Captioner, localizing video content for AI training and accessibility. Created and synchronized captions in Portuguese and Spanish for a range of English-language videos. Focused on preserving context and meaning in audiovisual translations. • Produced accurate video captions for AI dataset enrichment • Maintained linguistic consistency across translated content • Structured subtitles for machine learning consumption • Participated in quality assurance of localized datasets

2022 - 2023

Education

S

Salvador University

Bachelor of Science, Biomedicine

Bachelor of Science
2014 - 2018
U

University of Buenos Aires

Doctor of Medicine, Medicine

Doctor of Medicine
2022

Work History

U

Upwork

Translator and Proofreader

Buenos Aires
2023 - 2024