Patrick Rubio

Patrick Rubio

Software Engineer • Backend, Full-Stack & Cloud Development

Software engineer building backend, cloud, mobile, and full-stack applications using Java, Spring Boot, SQL, TypeScript, React Native, and AWS. I am the creator of BudgetPair, a privacy-focused budgeting app for couples, and have also developed REST APIs, serverless applications, and native Android software. As a former Starbucks Store Manager who led a team of more than 30 employees, I value technical problem-solving, clear communication, strong leadership, and taking ownership of my work.

Skills & Technologies

Technologies I use to build backend, full-stack, mobile, and cloud-based applications.

Backend Development

Java, Spring Boot, REST APIs, Spring Data JPA, Hibernate

Frontend & Mobile

TypeScript, JavaScript, React Native, Expo, HTML, CSS

Databases & Cloud

PostgreSQL, MySQL, SQLite, DynamoDB, AWS, Vercel

Development Tools

Git, GitHub, Docker, Maven, Postman, Android Studio

Featured Projects

A selection of mobile, backend, full-stack, and cloud applications I have designed, developed, and deployed.

BudgetPair – Couples Budgeting App project preview

BudgetPair – Couples Budgeting App

A privacy-focused, local-first budgeting application that helps couples organize shared finances. Built with React Native, Expo, and TypeScript, with offline functionality, optional Google and Apple sign-in, temporary couple synchronization, and RevenueCat-powered lifetime Pro access.

React NativeExpoTypeScriptHonotRPCUpstash RedisRevenueCat
ReserveNow – Booking System Backend project preview

ReserveNow – Booking System Backend

A Java and Spring Boot REST API for managing users, service listings, availability, and time-based reservations. Includes secure password hashing, relational database models, input validation, transactional workflows, and booking-conflict prevention.

JavaSpring BootPostgreSQLSpring Data JPAHibernateREST APIs
Wedding Website & RSVP Platform – AWS Serverless App project preview

Wedding Website & RSVP Platform – AWS Serverless App

A full-stack Website & RSVP platform used by more than 100 wedding guests. Features attendance tracking, meal selections, dietary restrictions, plus-one management, and event-specific responses through a responsive frontend and serverless AWS backend. Password: Olowalu

JavaScriptAWS LambdaAPI GatewayDynamoDBAWS AmplifyRoute 53
Vacation Planner – Android Application project preview

Vacation Planner – Android Application

A native Android travel-planning application for managing vacations and associated excursions. Includes persistent local storage, CRUD operations, date validation, search, notifications, sharing, and multi-screen navigation.

JavaAndroidRoomSQLiteMVVMXML

Contact

Interested in working together? Let's connect.

Los Angeles, CA