Vivaldo (Celestino) M.

AI Data Labeling

Nampula, Mozambique

Experience

Jan 2025 - Dec 2025
1 year

AI Data Labeling

Pareto

  • Participated in AI data annotation and labeling tasks for model training and evaluation.
  • Ensured accuracy, consistency, and quality of datasets while meeting deadlines.
  • Learned and adapted to proprietary platforms and guidelines for high-quality AI data preparation.
Jan 2022 - Dec 2025
4 years

Freelance Academic Research Assistant

Self-employed

  • Conducted ongoing research, synthesis, and academic writing support for university-level assignments and group projects.
  • Organized sources, prepared structured briefs, and maintained clarity under tight deadlines.
  • Coordinated with peers through asynchronous communication tools to align tasks and deliverables.
Jan 2016 - Dec 2025
10 years

Sales & Marketing Assistant

Family Store

  • Managed product display, pricing, and daily customer engagement, resulting in consistent returning clients.
  • Applied basic marketing strategies to improve product visibility and sales conversion.
  • Handled cash flow, inventory tracking, and customer service in a high-rotation retail environment.

Summary

Strategic support professional with cross-functional experience in operations, client interaction, and data-driven decision support. I structure information clearly, remove noise, and accelerate execution from research synthesis to documentation, briefing notes, customer follow-ups, and asynchronous communication. Known for calm problem-solving, clear written reasoning, and the ability to adapt language and tone to different audiences. Currently seeking roles where precision, analytical judgment, and high-trust communication contribute directly to product quality, scalable processes, and business outcomes across time zones.

Languages

Portuguese
Native
English
Advanced
Spanish
Elementary

Education

Oct 2023 - Jun 2026

Rovuma University

Bachelor's Degree, Earth Sciences · Geology · Mozambique

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