Mariana S.
Advance AI Data Trainer
Experience
Aug 2025 - Present
4 monthsAdvance 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 monthsAI 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 8 monthsData 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 monthsInternet 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
NativeEnglish
AdvancedEducation
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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