Mariana S. - Advance AI Data Trainer

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Lima, Peru

Experience

Aug 2025 - Present

5 months

Advance AI Data Trainer

Invisible Technologies

Evaluated AI-generated responses in both text and audio formats, providing human feedback to improve accuracy, relevance, and tone.
Contributed to reinforcement learning pipelines by generating high-quality training data that improved conversational models.

Nov 2024 - Jan 2025

3 months

AI Data Annotator (RLHF/SFT)

Translated

Applied Reinforcement Learning from Human Feedback (RLHF) and Supervised Fine-Tuning (SFT) techniques to train and optimize large-language-model outputs.
Refined AI-generated responses by implementing linguistic and structural modifications to improve coherence, fluency, and contextual accuracy.
Identified biases and inconsistencies in AI-generated text, providing structured feedback to enhance the model’s adaptability to real-world applications.

Apr 2024 - Present

1 year 9 months

Data Annotator/QA

E2f

Evaluated AI-generated text from a human-likeness and editorial perspective, selecting the most coherent and contextually relevant completions.
Reviewed content across diverse prompt types, identifying tone mismatches and logic flaws in phrasing.
Verified the accuracy and consistency of data sources, ensuring precise labeling.

Jan 2024 - Mar 2024

3 months

Internet Ads Assessor

Telus International

Evaluated and analyzed online advertisements for relevance, effectiveness, and compliance with platform policies.
Examined different ad types (search, display, and video) and gave feedback on the quality of the ad copy and the landing page experience, which had a direct effect on how the algorithm changed the rankings.

Languages

Spanish

Native

English

Advanced

Education

Mar 2020 - Mar 2022

Universidad de Piura

Bachelor’s Degree · Service Administration · Lima, Peru

Toulouse Lautrec

Bachelor’s Degree · Multimedia and Audiovisual Communication · Lima, Peru

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Riccardo A.

Experience

Advance AI Data Trainer

Invisible Technologies

AI Data Annotator (RLHF/SFT)

Translated

Data Annotator/QA

E2f

Internet Ads Assessor

Telus International

Languages

Education

Universidad de Piura

Bachelor’s Degree · Service Administration · Lima, Peru

Toulouse Lautrec

Bachelor’s Degree · Multimedia and Audiovisual Communication · Lima, Peru

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