AJ de Leon

Led the end-to-end development of new features for a critical React/Typescript application, taking ownership from concept to deployment. Architected core application patterns and championed React and TypeScript best practices, conducting code reviews and mentoring team members.

Spearheaded the development of a new React Native application from scratch, successfully releasing it to both iOS and Android app stores. Drove the migration of a NoSQL Firestore database to PostgreSQL, designing a simpler SQL data model, and consolidated backend functionality into a cohesive GraphQL API on GCP.

Promoted best practices in coding and architecture by translating product requirements into detailed technical specifications for a Node.js/NestJS and React backend. Mentored and guided a team of 3-5 overseas contractors, fostering a collaborative environment and ensuring adherence to high engineering standards.

Key contributor to evolving the engineering team by implementing and advocating for software development best practices, including Git flow, CI/CD, and Infrastructure as Code. Mentored junior engineers on functional programming paradigms and effective communication with business teams.

Demonstrated strong leadership by architecting and leading the redesign of a critical coupon system from a monolith to a scalable microservice architecture, including significant React frontend work. Drove the development of data-driven features for a large-scale consumer app, impacting rewards and checkout processes.