Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I am a detail-oriented and tech-savvy professional with hands-on experience in AI LLM model evaluation, search engine analysis, customer support, and e-commerce. I enjoy leveraging my strong problem-solving, digital literacy, and communication skills to contribute to roles that value accuracy and efficiency in fast-paced environments. With a diverse background including ecommerce business ownership, freelance graphic and UI/UX design, as well as technical support and AI evaluation projects, I pride myself on adaptability and a positive mindset to meet challenging objectives both independently and within teams.…I am a detail-oriented and tech-savvy professional with hands-on experience in AI LLM model evaluation, search engine analysis, customer support, and e-commerce. I enjoy leveraging my strong problem-solving, digital literacy, and communication skills to contribute to roles that value accuracy and efficiency in fast-paced environments. With a diverse background including ecommerce business ownership, freelance graphic and UI/UX design, as well as technical support and AI evaluation projects, I pride myself on adaptability and a positive mindset to meet challenging objectives both independently and within teams.

Osbaldo Junior Mejia

QA Engineer, Game Tester, UI Designer, +7





I am a detail-oriented and tech-savvy professional with hands-on experience in AI LLM model evaluation, search engine analysis, customer support, and e-commerce. I enjoy leveraging my strong problem-solving, digital literacy, and communication skills to contribute to roles that value accuracy and efficiency in fast-paced environments. With a diverse background including ecommerce business ownership, freelance graphic and UI/UX design, as well as technical support and AI evaluation projects, I pride myself on adaptability and a positive mindset to meet challenging objectives both independently and within teams.…I am a detail-oriented and tech-savvy professional with hands-on experience in AI LLM model evaluation, search engine analysis, customer support, and e-commerce. I enjoy leveraging my strong problem-solving, digital literacy, and communication skills to contribute to roles that value accuracy and efficiency in fast-paced environments. With a diverse background including ecommerce business ownership, freelance graphic and UI/UX design, as well as technical support and AI evaluation projects, I pride myself on adaptability and a positive mindset to meet challenging objectives both independently and within teams.

Available to hire

I am a detail-oriented and tech-savvy professional with hands-on experience in AI LLM model evaluation, search engine analysis, customer support, and e-commerce. I enjoy leveraging my strong problem-solving, digital literacy, and communication skills to contribute to roles that value accuracy and efficiency in fast-paced environments.

With a diverse background including ecommerce business ownership, freelance graphic and UI/UX design, as well as technical support and AI evaluation projects, I pride myself on adaptability and a positive mindset to meet challenging objectives both independently and within teams.

Skills

Experience Level

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Spanish; Castilian

Fluent

Work Experience

Search Engine Evaluator / AI LLM (RLHF) / App tester at Appen

December 1, 2023 - July 1, 2025

Assessed the relevance and quality of search engine results to improve user satisfaction. Analyzed web content, ads, and social media posts to provide structured feedback. Applied guidelines precisely while working independently and meeting tight deadlines. Helped evaluate AI Large Language Model response prompts and engaged in Reinforcement Learning Human Feedback (RLHF). Followed steps for testing browser or app features and reporting bugs.

Ecommerce Business Owner at Self-Employed

January 1, 2021 - August 26, 2025

Designed and managed a dropshipping and clothing brand website including product launches, digital marketing, and email response. Used CRM tools and analytics to improve user engagement and customer segmentation. Applied SEO principles and A/B testing to optimize traffic and conversions.

Graphic Designer / Photo Editor / UI UX Designer at Freelancer.com

January 1, 2020 - August 26, 2025

Created logos, branding elements, and edited images for clients across music and retail industries. Delivered visually striking assets using Adobe Photoshop, often for album covers and ads. Produced modern and minimalistic UI UX design projects.

Computer Builder & Tech Reseller at Self-Employed

December 31, 2020 - August 25, 2025

Built and sold custom computers, researched market demand and price trends. Provided detail-oriented tech support, showcasing strong problem-solving skills.