Tiago G.-AI Model Trainer/Data Annotator
Check rate
Experience
AI Model Trainer/Data Annotator
Uber AI Solutions
- Audited and reviewed 800+ audio recordings for Project Sandbox, improving AI audio recognition and comprehension through accurate annotation and quality checks.
- Validated audio data against project standards, identifying inconsistencies and supporting more reliable model training outputs during a 6-month freelance engagement.
- Delivered precise review feedback on annotated audio tasks, helping maintain turnaround targets and strengthen dataset usability for AI development.
AI Model Trainer/Data Labeler
Mindy Support
- Classified and labelled 3,000+ visual data items to strengthen AI image recognition and classification accuracy while adhering to strict project guidelines and QA standards.
- Reviewed annotated outputs for consistency and compliance, maintaining high-quality datasets and supporting model training cycles within a 4-month project window.
- Applied detailed labeling rules across edge cases, helping improve dataset reliability and reduce rework during visual classification tasks.
Internship
Randstad / Vodafone
- Delivered provisioning support for Vodafone Portugal's contact center, helping process service requests and maintain workflow continuity during a 6-month internship.
- Resolved calls with 20+ clients and field-service technicians weekly, clarifying service issues and coordinating updates to support timely provisioning.
- Processed provisioning requests for telecom services and products, contributing to accurate order handling and smoother customer support operations.
- Built practical experience in contact center operations, telecom provisioning workflows, and cross-team communication within a fast-paced service environment.
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology and Telecommunication.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Quality Assurance, and Customer Service.
Summary
AI Model Trainer with experience in data annotation, audio/image review, and quality-focused training work across multiple platforms; familiar with Python, R, SQL, Splunk, and Tableau and working with databases through Cyber-Security and Data Analysis training. Also have worked on conversation recording projects for Acolad and sentence recording project for LionBridge.
Currently i am working on a transcription project for Argos Multilingual, that has the purpose of improving AI Models speech recognition capabilities.
Skills
Data Annotation And Labelling
Data Analysis And Database Management
Creative And Analytical Approach
Critical Thinking
Collaboration And Teamwork
Hard-Working And Focused
Python
R
Sql
Splunk
Tableau
Microsoft Office
Word
Excel
Powerpoint
Access
Native European Portuguese
Professional English
Brazilian Portuguese
Languages
Education
António Carvalho Figueiredo High School
High School Diploma · Sciences/Technologies · Portugal
Certifications & licenses
Foundations of CyberSecurity
Data Analytics
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Tiago is based in Lisbon, Portugal and can operate in on-site, hybrid, and remote work models.
Tiago speaks the following languages: Portuguese (Native), English (Advanced).
Tiago has at least 1 year of experience. During this time, Tiago has worked in at least 3 different roles and for 3 different companies. The average length of individual experience is 5 months. Note that Tiago may not have shared all experience and actually has more experience.
Based on recent experience, Tiago would be well-suited for roles such as: AI Model Trainer/Data Annotator, AI Model Trainer/Data Labeler, Internship.
Tiago's most recent position is AI Model Trainer/Data Annotator at Uber AI Solutions.
In recent years, Tiago has worked for Uber AI Solutions and Mindy Support.
Tiago is most experienced in industries like Information Technology and Telecommunication.
Tiago is most experienced in business areas like Information Technology, Quality Assurance, and Customer Service.
Tiago attended António Carvalho Figueiredo High School for Sciences/Technologies.
Tiago has 2 certificates. These include: Foundations of CyberSecurity and Data Analytics.
Tiago is immediately available part-time for suitable projects.
Daily rate distribution
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 6 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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