John Rey Doromal

Full-Stack AI Developer with 2+ years of experience building scalable, high-performance web and AI applications. Experienced in leading full product lifecycles—from architecture to deployment—across startup and freelance projects. Delivered secure, cloud-based systems and large-scale AI platforms, including a RAG-powered legal intelligence solution processing 130,000+ documents and serving 1,000+ professionals.

Skilled in Next.js, TypeScript, PostgreSQL, AWS, and Firebase, with deep expertise in RAG systems, multitenant SaaS architecture, and advanced access control. Focused on performance, security, and seamless user experience.

Full-Stack AI Developer at Zenthi Tech OPC (2024-11 – Present)

• Led end-to-end product lifecycle from ideation, market research, and validation to MVP launch and full production deployment
• Built and deployed an AI-driven legal research platform processing and indexing 130,000+ legal documents using a RAG system
• Implemented scalable back-end systems achieving 70% faster document retrieval and 95% query accuracy
• Developed embedding and quantization strategies cutting storage needs 36× and boosting retrieval speed by 70%
• Enhanced search precision through a semantic re-ranking strategy, maintaining 95% retrieval accuracy

Full-Stack Developer at Freelance (2024-08 – 2024-09)

Developed the initial version of a cloud-based Patient Management System (PMS) for an international client, delivering secure, scalable architecture on AWS.

• Built a secure, full-stack PMS with robust data security and scalable performance to streamline healthcare data management
• Implemented AWS S3 and DynamoDB for efficient, scalable storage solutions
• Deployed application via AWS Amplify for reliable, cloud-native hosting
• Integrated AWS Cognito authentication to safeguard sensitive patient data and ensure secure user access

Front-End Developer at Freelance (2024-06 – 2024-07)

Built the MVP of an interactive Learning Management System (LMS) from scratch for an international client, delivering an engaging, responsive UI with gamification features.

• Designed and implemented a comprehensive UX/UI optimized for accessibility and engagement
• Developed exam and quiz interfaces with dynamic, interactive functionality
• Integrated a gamification points system to drive learner motivation and retention
• Created end-to-end onboarding flows for both students and tutors, enhancing platform usability

Bachelor of Arts in Political Science – University of Mindanao (2021-01 – 2025-08)

Senior High School Diploma – University of Mindanao (2018-01 – 2020-09)