Open to opportunities

Jenzel Mhar De Jesus

@jenzelmhardejesus

Message

Data-focused LLM and quality analyst turning data workflows into higher-accuracy systems.

Philippines

Message

What I'm looking for

I’m looking to apply my detail-oriented approach in Quality Engineering, Systems Operations, and Data Analysis—leveraging hardware-software integration, system configuration, and network fundamentals to improve accuracy, reliability, and workflow efficiency.

I’m an Analytical and adaptable Computer Engineering graduate (Embedded Systems) from Mapúa University, specialized in using rigorous validation to improve model accuracy and operational reliability. I bring over 4 years of project-based technical work focused on optimizing data workflows, strengthening compliance quality, and troubleshooting systems to keep performance dependable.

In my current Appen roles, I assess content integrity, improve detection accuracy from 70% to 95%, and help raise moderation efficiency by 10%. I also manage and optimize LLMs for English and Tagalog, improving localized context accuracy from 40% to 90%, while supporting data annotation and transcription workflows that boost speech-to-text accuracy by 95%.

Experience

Work history, roles, and key accomplishments

Current

Social Media Evaluator

Current

Appen Limited

Aug 2019 - Present (6 years 9 months)

Evaluated advertisements and user content for integrity and compliance, applying localized filtering aligned with social media client policies. Improved detection accuracy from 70% to 95% and increased moderation efficiency by 10% by addressing policy-violating visual content.

Content Moderation Filtering Compliance Policies Quality Assurance Content Integrity Localization

Current

Computational Linguistics LLM Analyst

Current

Appen Limited

Aug 2019 - Present (6 years 9 months)

Managed and optimized large language AI models for English and Tagalog using machine learning and prompt engineering. Improved localized context accuracy from 40% to 90% by applying linguistic analysis of language patterns and cultural nuances with rigorous validation.

Large Language Models Prompt Engineering Machine Learning Linguistic Analysis Model Validation Data Analysis

Current

Data Annotator & Transcriber

Current

Appen Limited

Aug 2019 - Present (6 years 9 months)

Labeled complex datasets and converted audio/text between English and Tagalog to support client speech-to-text performance. Increased speech-to-text accuracy by 95% and improved workflow outcome rate to 80% by following quality standards using specialized tools.

Data Annotation Audio Transcription Text To Speech Standards Workflow Optimization

Developer Intern

Ollopa Corporation

Sep 2024 - Nov 2024 (2 months)

Conducted debugging and troubleshooting to improve website performance and ensure cross-browser compatibility, reducing website downtime by 70% during maintenance. Contributed to the full SDLC for e-commerce services through code reviews and cross-functional collaboration to improve system efficiency and user experience consistency.

Debugging Troubleshooting Web Performance Browser compatibility Code Review SDLC E commerce Development User Experience

Education

Degrees, certifications, and relevant coursework

Mapúa University

Bachelor of Science in Computer Engineering, Computer Engineering (Embedded Systems)

Activities and societies: Thesis: Classification of indoor plant and health monitoring system using Dense Net Algorithm. Achievement: Best Thesis Poster Design based on IEEE research standard.

Earned a B.S. in Computer Engineering specializing in Embedded Systems. Thesis focused on indoor plant and health monitoring using a DenseNet-based classification approach, with recognition for Best Thesis Poster Design based on IEEE research standards.