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Mark Jayson Regato

@markjaysonregato

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Senior AI Engineer at Aptiv building production AI features and RAG systems that improved answer relevance 38%.

Philippines

Message

At Aptiv, I build production AI features for customer-facing applications using Python and models including OpenAI GPT-4, Anthropic Claude, Google Gemini, and Llama. My RAG work improved answer relevance by 38% across representative datasets.

Previously, I developed AI workflows and APIs at Instacart and Python services at Aboitiz. I’ve worked across deployment, evaluation, and monitoring to bring AI applications into production.

Experience

Work history, roles, and key accomplishments

Current

Senior AI Engineer

Current

Aptiv

Aug 2024 - Present (2 years 2 months)

Spearheaded production AI features using Python and multiple LLMs, reducing manual workflows by 42%. Architected scalable backend services and RAG systems, improving answer relevance and service availability.

AI Engineer

Instacart

Feb 2023 - Jul 2024 (1 year 5 months)

Developed Python backend services and APIs integrating multiple LLMs into production workflows serving 100,000 monthly requests. Designed RAG pipelines and agent frameworks, increasing grounded response accuracy by 31%.

Python OpenAI GPT 4 Anthropic: Claude Gemini LLaMA RAG Systems LLM AI Agent Frameworks Prompt Engineering REST APIs SQL PostgreSQL AWS Google Cloud Platform Testing Frameworks Evaluation Metrics Clean Code System Design

Backend Engineer

Aboitiz

Nov 2017 - Jan 2023 (5 years 2 months)

Implemented Python services and REST APIs backed by Postgres, establishing reliable integrations for data-heavy applications. Migrated workloads to Microsoft Azure, reducing operational interruptions by 25%.