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Hi, I’m Luiz Krawiec, a native Portuguese speaker with strong experience in linguistic data labeling, audio transcription, and AI training data preparation. I work comfortably in English and Portuguese, with a meticulous eye for detail and a passion for language technology and NLP. I thrive on remote, deadline-driven projects and bring a reliable, focused approach to turning complex datasets into accurate, well-documented resources for machine learning models. I value clear communication, structured processes, and high-quality results that facilitate robust AI systems.…Hi, I’m Luiz Krawiec, a native Portuguese speaker with strong experience in linguistic data labeling, audio transcription, and AI training data preparation. I work comfortably in English and Portuguese, with a meticulous eye for detail and a passion for language technology and NLP. I thrive on remote, deadline-driven projects and bring a reliable, focused approach to turning complex datasets into accurate, well-documented resources for machine learning models. I value clear communication, structured processes, and high-quality results that facilitate robust AI systems.

Luiz Krawiec

Data Annotator, Audio Transcriber, Voiceover Artist, +5

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Hi, I’m Luiz Krawiec, a native Portuguese speaker with strong experience in linguistic data labeling, audio transcription, and AI training data preparation. I work comfortably in English and Portuguese, with a meticulous eye for detail and a passion for language technology and NLP. I thrive on remote, deadline-driven projects and bring a reliable, focused approach to turning complex datasets into accurate, well-documented resources for machine learning models. I value clear communication, structured processes, and high-quality results that facilitate robust AI systems.…Hi, I’m Luiz Krawiec, a native Portuguese speaker with strong experience in linguistic data labeling, audio transcription, and AI training data preparation. I work comfortably in English and Portuguese, with a meticulous eye for detail and a passion for language technology and NLP. I thrive on remote, deadline-driven projects and bring a reliable, focused approach to turning complex datasets into accurate, well-documented resources for machine learning models. I value clear communication, structured processes, and high-quality results that facilitate robust AI systems.

Available to hire

Hi, I’m Luiz Krawiec, a native Portuguese speaker with strong experience in linguistic data labeling, audio transcription, and AI training data preparation. I work comfortably in English and Portuguese, with a meticulous eye for detail and a passion for language technology and NLP.

I thrive on remote, deadline-driven projects and bring a reliable, focused approach to turning complex datasets into accurate, well-documented resources for machine learning models. I value clear communication, structured processes, and high-quality results that facilitate robust AI systems.

Skills

AI Data Labelling

Data Visualization

DaVinci Resolve Studio

Adobe Premiere Pro

Adobe Illustrator

Experience Level

AI Data Labelling

Expert

Data Visualization

Expert

DaVinci Resolve Studio

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Portuguese

Fluent

English

Fluent

Work Experience

Freelance Linguistic Data & Annotation Specialist at Self-employed / Remote

October 1, 2023 - Present

Annotated and reviewed Portuguese and English text and audio datasets for AI training. Applied structured guidelines to classify data, detect tone, and validate model predictions. Delivered consistent, high-quality labeling to support language model development. Managed asynchronous, deadline-driven projects with minimal supervision.

Data Analyst at Municipal IT & Innovation Agency, Campo Grande, Brazil

September 1, 2023 - October 9, 2025

Led quality control for data collection and reporting workflows. Automated validation routines using SQL and Python, improving data accuracy by about 35%. Collaborated with communications teams to create clear, standardized documentation for data processes.

IT & Communications Manager at Municipal Secretary of Social Assistance, Brazil

February 29, 2020 - October 9, 2025

Managed cross-departmental communication systems, ensuring clarity and compliance. Provided user training on digital systems and information accuracy. Coordinated documentation and feedback tracking for digital transformation initiatives.

Freelance Linguistic Data & Annotation Specialist at Remote (Freelance)

October 1, 2023 - Present

Annotate and review text and audio datasets for AI training (Portuguese and English). Apply structured guidelines to classify data, detect tone, and validate model predictions. Deliver consistent, high-quality labeling for language model development. Manage time effectively in asynchronous, deadline-driven projects with minimal supervision.

Data Analyst at Municipal IT & Innovation Agency, Campo Grande, Brazil

September 2, 2023 - October 9, 2025

Conducted quality control on data collection and reporting workflows. Automated validation routines with SQL and Python, improving data accuracy by 35%. Collaborated with communications teams to create clear, standardized documentation for data processes.

IT & Communications Manager at Municipal Secretary of Social Assistance, Brazil

February 29, 2020 - October 9, 2025

Freelance Linguistic Data & Annotation Specialist at Self-employed / Freelance

October 1, 2023 - Present

Annotate and review text and audio data sets for AI training (Portuguese and English). Applied structured guidelines to classify data, detect tone, and validate model predictions. Delivered consistent, high-quality labeling for language model development. Managed time effectively in asynchronous, deadline-driven projects with minimal supervision.

Data Analyst at Municipal IT & Innovation Agency

September 1, 2023 - October 9, 2025

Led data quality control on data collection and reporting workflows. Automated validation routines with SQL and Python, improving data accuracy by 35%. Collaborated with communications teams to create clear, standardized documentation for data processes.

IT & Communications Manager at Municipal Secretary of Social Assistance

February 1, 2020 - October 9, 2025

Managed cross-departmental communications systems, ensuring clarity and compliance. Provided user training on digital systems and information accuracy. Coordinated documentation and feedback tracking for digital transformation initiatives.