Hi, I'm JayR Castro
Building intelligent systems that bridge the gap between cutting-edge AI research and real-world applications. Specializing in LLMs, autonomous agents, and production-ready machine learning solutions.
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Building AI solutions across industries
AI Engineer
Moneydolly - AI Agent (Finn)
2026
Built Finn, a multi-autonomous AI Agent for Moneydolly's fundraising platform.
Finn leverages MCP server for tools, enabling users to create fundraising campaigns instantly, send messages, escalate issues, and answer questions using RAG.
Integrated Slack notifications for campaign managers and implemented phone call capabilities for seamless user communication.
AI Engineer
Cooks Florist - AI Phone Assistant (Kayla)
2026
Designed Kayla, a SOL-style AI voice agent that answers and places calls, sends texts/emails, and guides customers through Cook's Florist orders.
I architected an API + MCP toolchain for knowledge, product, deliverability, and payment handoffs so every sub-300-character reply stays accurate, warm, and compliant.
AI Engineer
Team Floral
2024 to 2025
AI Assistant Development & Website Creation for TeamFloral
I designed and developed Rosie, an advanced AI assistant for TeamFloral, that automates report generation, internet searching, and web scraping. Rosie processes data using MCP (Machine-Comprehension Processing) and RAG (Retrieval-Augmented Generation), ensuring efficient and accurate information retrieval. The assistant is integrated with MongoDB for robust data storage and management.
In addition to the backend and AI work, I was responsible for the creation of both the front-end and back-end of the website, ensuring a seamless and responsive user experience.
As part of the AI development, I fine-tuned a machine learning model on a proprietary dataset called 'Flower and Profits', which is used for advanced analysis and reporting. Furthermore, I implemented and trained a Prophet model, enabling the prediction of sales trends for upcoming months, empowering the business to make data-driven decisions.
AI Engineer
New Age Media Group
2023 to 2024
Developed an advanced audio matching system to identify commercial audio within radio station streams, ensuring accurate playback timing. Implemented a comprehensive Text-to-Speech (TTS) function utilizing AWS Lambda for seamless audio integration.Developed an advanced audio matching system to identify commercial audio within radio station streams, ensuring accurate playback timing. Implemented a comprehensive Text-to-Speech (TTS) function utilizing AWS Lambda for seamless audio integration.
View ProjectAI Product Engineer
Zero Company Marketing Performance, USA
2021 to 2023
Built an AI Chief Marketing Officer (AICMO) that provides different kinds of marketing tools, from building a marketing plan to creating landing page to ad copies with one push of a button.
View ProjectSenior Machine Learning Engineer
Boredhumans.com, USA
2021 to 2023
Created bunch of AI web applications for boredhumans.com. The website was originally created for people who want to try AI Applications without coding or hassle. Trained models including CV, Text2Audio, Audio2Text, NLP, and LLMs.
View ProjectChief Technology Officer / Machine Learning Engineer
MetrocityAI Start Up, Philippines
2019 to 2022
Built Hiring AI that reads CVs using OCR and NLP to compare with Job Descriptions. Also added an Audio-to-Text feature to analyze applicant responses in interviews.
View ProjectMachine Learning Developer
Thobias.com
2021 to 2022
Developed Photoshoot Selection using Pose Estimation and Learning to Rank. Built a Raw Video to Production pipeline using GANs and Pose Estimation. Also developed Deep Fashion for clothing/accessory detection.
View ProjectData Scientist / Machine Learning Engineer
Job Tensor UK / DE
2020 to 2021
Fine-tuned transformer models to generate occupations from job posts. Used NLP to extract company locations from job descriptions.
View ProjectSoftware Developer / Machine Learning Engineer
Monster Group UK LTD., UK
2020 to 2021
Created a web app to detect invoice discrepancies using AI.
View ProjectSoftware Developer / Machine Learning Engineer
BlickLabor Start Up, Germany
2019 to 2020
Built an ML software for automated checkout detecting grocery products in supermarkets.
View ProjectContent Automation Specialist / RPA Developer
Reed Elsevier Share Services, PH
2017 to 2020
Built process automation, including 'Nimmer QC Automation' which reduced processing from 1 month to 3 days.
View ProjectProjects
Featured AI & ML projects
Rolepley.ai
LLM / NLP / ML Engineer
AI chatbot platform offering personalized, judgment-free conversations with AI companions. Offers both free and subscription tiers.
ExploreArticulacy.app
Machine Learning Engineer
Web app that improves users’ communication, vocabulary, and argumentation skills.
ExploreEqual.AI
Machine Learning Engineer
Job Ads website using GPT-3 to neutralize gender bias. Computes applicant-job similarity using Transformer embeddings and vector databases.
ExplorePoliceAuction Chatbot
Machine Learning Engineer
Chatbot for PoliceAuctions.com using GPT-3 prompt engineering with memory and embeddings.
ExploreOpenAI Clip and BigGAN Music Video
Machine Learning Developer
Project for Yannic Kilcher using OpenAI Clip and BigGAN to auto-generate music videos based on lyrics.
ExploreReddit Automation
Machine Learning Developer
One-click app that scrapes Reddit posts, turns them into creative videos, and auto-uploads to YouTube.
ExploreMachine Learning with only NUMPY (MNIST DATASET)
Machine Learning Developer
Trained an ML model on MNIST from scratch using only Numpy without any ML frameworks.
ExploreSkills & Technologies
Tools and technologies I work with