Mariana Samaniego - Advance AI Data Trainer

Q: Where is Mariana based?

Mariana is based in Lima, Peru .

Q: What languages does Mariana speak?

Mariana speaks the following languages: Spanish (Native), English (Advanced) .

Q: How many years of experience does Mariana have?

Mariana has at least 3 years of experience. During this time, Mariana has worked in at least 4 different roles and for 4 different companies . The average length of individual experience is 1 year and 8 months . Note that Mariana may not have shared all experience and actually has more experience.

Q: What is Mariana's latest experience?

Mariana's most recent position is Advance AI Data Trainer at Invisible Technologies .

Q: What companies has Mariana worked for in recent years?

In recent years, Mariana has worked for Invisible Technologies , Translated , E2f , and Telus International .

Q: Which industries is Mariana most experienced in?

Mariana is most experienced in industries like Information Technology , Professional Services , and Advertising .

Q: Which business areas is Mariana most experienced in?

Mariana is most experienced in business areas like Quality Assurance , Product Development , and Research and Development . Mariana also has some experience in Information Technology and Marketing .

Q: What is Mariana's education?

Mariana holds a Bachelor in Service Administration from Universidad de Piura (UDEP) and a Bachelor in Multimedia and Audiovisual Communication from Toulouse Lautrec (TLS) .

Q: What is the availability of Mariana?

Mariana is immediately available full-time for suitable projects.

Recommended expert

Lima, Peru

Check rate

Experience

Aug 2025 - Present

1 year

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

2 years 4 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.

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology and Professional Services.

Information Technology

Professional Services

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Quality Assurance, Product Development, and Research and Development.

Quality Assurance

Product Development

Research and Development

Skills

Natural Language Processing (Nlp) Basics
Fact-Checking & Information Verification
Writing For Ai Training
Data Labeling Platforms
Google Workspace & Microsoft Office 360
Ai Training & Evaluation Tools
Time Management & Multitasking
Attention To Detail & Analytical Thinking
Adaptability & Fast Learning

Languages

Spanish

Native

English

Advanced

Education

Mar 2020 - Mar 2022

Universidad de Piura (UDEP)

Bachelor’s Degree in Service Administration (Incomplete) · Service Administration · Lima, Peru

Toulouse Lautrec (TLS)

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

Statistics

Experience

Total positions 4

Experience in Information Technology 2.5 y

Avg length 11 m

Longest experience 2 y 3 m

Expertise

Recent roles Advance AI Data Trainer, AI Data Annotator (RLHF/SFT), Data Annotator/QA

Main industries Information Technology, Professional Services

Main business areas Quality Assurance, Product Development, Research and Development

Qualifications

Highest degree Bachelor

Profile

Created

November 2025

Last Update

November 2025

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Frequently asked questions

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Mariana is based in Lima, Peru.

Mariana speaks the following languages: Spanish (Native), English (Advanced).

Mariana has at least 3 years of experience. During this time, Mariana has worked in at least 4 different roles and for 4 different companies. The average length of individual experience is 1 year and 8 months. Note that Mariana may not have shared all experience and actually has more experience.

Based on recent experience, Mariana would be well-suited for roles such as: Advance AI Data Trainer, AI Data Annotator (RLHF/SFT), Data Annotator/QA.

Mariana's most recent position is Advance AI Data Trainer at Invisible Technologies.

In recent years, Mariana has worked for Invisible Technologies, Translated, E2f, and Telus International.

Mariana is most experienced in industries like Information Technology, Professional Services, and Advertising.

Mariana is most experienced in business areas like Quality Assurance, Product Development, and Research and Development. Mariana also has some experience in Information Technology and Marketing.

Mariana holds a Bachelor in Service Administration from Universidad de Piura (UDEP) and a Bachelor in Multimedia and Audiovisual Communication from Toulouse Lautrec (TLS).

Mariana is immediately available full-time for suitable projects.

Mariana's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.

To hire Mariana, click the Meet button on the profile to request a meeting and discuss your project needs.