# Horacio Castillo Del Rio > Software Engineer at Apple Location: United States, United States Profile: https://flows.cv/horacio Welcome to my profile I am a first generation Computer Science graduate from the University of California, Santa Cruz. During undergrad, I had the privilege of completing five software engineering internships. Most of my work focused on frontend web development using frameworks like React. In addition, I gained experience with backend web development and full stack mobile development using React Native and Android. I currently work at Apple as a Software Engineer, focusing on frontend web development and writing automated end-to-end tests to ensure the quality and user experience of our web applications. I am resourceful, reliable, determined, and a quick learner. I am known for having a positive attitude and enjoy collaborating. ## Work Experience ### Software Engineer @ Apple Jan 2023 – Present | Cupertino, California, United States ### Software Engineer @ Uber Jan 2022 – Jan 2022 | San Francisco, California, United States Built a backend API using Protocol Buffers, MVCS Architecture, and Golang that downloads data from selected failed metrics as a CSV file. Developed a frontend interface that allows the user to select metrics and download the data by communicating with the API. Created unit tests at every step of the development process to ensure reliable code. ### Bloomberg San Francisco Tech Lab Fellow @ Bloomberg LP Jan 2022 – Jan 2022 | San Francisco, California, United States One of 28 engineers selected to attend three day intensive at Bloomberg Engineering's San Francisco Office Collaborated with Bloomberg engineers + peers to build a Python based portfolio manager Attended interactive sessions focused technical SWE interview skills ### Software Engineer @ Adobe Jan 2022 – Jan 2022 | San Jose, California, United States Developed a custom video player with a theater mode feature to create a better user experience on the web version of one of Adobe’s most popular products using Spectrum CSS, React, and Typescript. Users are able to simultaneously watch video tutorials and interact with the host app. Collaborated with multiple engineers and stakeholders throughout the project until its completion. ### Software Engineer @ Reddit, Inc. Jan 2022 – Jan 2022 | San Francisco, California, United States Implemented a soundboard feature on their Talk product that allows hosts to play common sound effects to be heard by all listeners in the room using LitElement, Tailwind CSS, and Typescript. Lead the project to completion which involved consistent communication with product managers, designers, and other engineers. ### Software Engineer @ Remitly Jan 2021 – Jan 2021 | Seattle, Washington, United States Developed a feature that shows frequently selected countries based on the user’s preferred device language. Implemented and launched an Android specific in-app language selector feature on an existing codebase using React Native, TypeScript, Java and Kotlin. Increased sign-up completion by about 30% which led to a 10% increase in remittance transactions. ### Student Web Developer @ University of California, Santa Cruz Jan 2021 – Jan 2021 | Santa Cruz, California, United States Maintained the University of California, Santa Cruz Library website using JavaScript, HTML, and CSS. ### Software Engineer @ UnitedHealth Group Jan 2020 – Jan 2020 | Raleigh, North Carolina, United States Developed a community and learning platform utilizing React, JavaScript, Bootstrap, HTML, and CSS to promote health equity by increasing trust between health professionals and minority communities in the United States. Led the front-end development team through an agile programming methodology over a 3-month period. Won 1st in Diversity & Inclusion and 3rd overall in the internal Shark Tank competition. ### Undergraduate Research Assistant @ Tech4Good Jan 2020 – Jan 2020 | Santa Cruz, California, United States Initiated over 30 individual commits that led to the 70% completion of a learning-based website in just 2 months which resulted in an early release date. Utilized HTML, CSS, and Typescript as a prominent contributor on the UI team to deliver individualized components of a learning platform. ### Python Course Tutor @ University of California, Santa Cruz Jan 2020 – Jan 2020 | Santa Cruz, California, United States Tutored over 20 students every week throughout the “Programming Abstractions: Python” course to ensure full comprehension and success from the students. Assignment topics included Data Structures, Classes and Object-oriented programming, Pygame, PyOpenGL and OpenCV. ### Information Technology Intern @ MANTECA UNIFIED SCHOOL DISTRICT Jan 2016 – Jan 2016 | Manteca, CA Assisted, along with 4 other interns, with the re-imaging and re-configuring of over 10,000 student devices, which were the devices given to students across the districts 11 different elementary schools. The purpose was to get the devices ready for the upcoming school year so they could be used in the curriculum. ## Education ### Bachelors of Science in Computer Science: Computer Game Design University of California, Santa Cruz ### Software Engineering CodePath Jan 2019 – Jan 2021 ### Weston Ranch High School Jan 2014 – Jan 2018 ## Contact & Social - LinkedIn: https://linkedin.com/in/horacrio --- Source: https://flows.cv/horacio JSON Resume: https://flows.cv/horacio/resume.json Last updated: 2026-03-22