Kevin Chang

For the 2021 - 2022 school year, I have the pleasure of being the organization's Internal Affairs Chair, with the responsibility to plan club socials and help cultivate a positive and safe environment among members. I also helped design some recruitment materials (below).

Last school year, I was a Section Editor for Blue and Gold (UC Berkeley's yearbook publication), where I helped oversee production of the various content that we produce. Our coverage of the campus includes student and community events, club and Greek features, and sports, among other types of events. I'm also this year's Marketing Designer, responsible for creating media used to promote the organization, the yearbook itself, and our senior portrait service.

Last year, I was a part of the Design Team, where I merged photos and copy taken from exciting campus and community events to create artistic two-page spreads - some samples can be seen below.

Since Blue & Gold is a print publication, I use InDesign primarily, Photoshop for any image manipulation needs, and the occasional Illustrator for more involved vector art. Click on the images to see some of the spreads I've worked on so far.

Over Summer 2019, I worked on a complete brand overhaul for Parliamentary Debate at Berkeley; this included the creation of a brand identity, media kit, and website. We started with looking at possible logos. A major factor in our design choices was to control how we wanted the rebrand to influence our perception in the greater debate community. Because PDB is a student-run organization that competes with primarily university-funded programs, it was important that our brand would help legitimize ourselves within the community, while also establishing a unique identity. These goals are reflected in our final logo, which maintains a simple and professional appearance with a touch of flair.

From there, we built out the rest of the media kit. Teal and orange were chosen as a play on UC Berkeley's classic blue and gold, while our group of font unified the classic formal perception of debate (serif) with a modern aesthetic (sans-serif).

Next, I started working on a new website to spearhead our digital presence for recruiting members, collecting donations, and displaying our achievements. I used XD and some Figma to build out some rough prototypes of layout and specific elements, then helped render some full-detail mockups in Illustrator. Because the website is largely static content (copy and photos), I only used vanilla JavaScript and minimal jQuery to minimize website size and simplify future maintenance. You can visit the website here.

Additional miscellaneous work for PDB included the creation of various digital and physical marketing media. For beginning-of-semester recruitment, I designed some flyers to hand out to students, with a design meant to transition our older dark and regal look out and introduce the our brand identity.

For a fundraising campaign later in Fall 2019, I also filmed and produced a marketing film using Premiere Pro, in addition to creating some supplementary graphics. It's primary goals were to introduce the general public to debate as a competitive activity, introduce the team through a friendly, informal lens, and incentive donations by emphasizing the tight budget and challenging conditions that PDB operates on. You can view this video here. Until August 2021, I was responsible for maintaining social media presence by maintaining the website and our Facebook page.

I'm currently in the process of creating a portfolio website for INK, the in-house creative agency for The Daily Californian (Cal's student-run paper, and the official newspaper for the city of Berkeley). In Spring 2020, I used Figma to create mockups of what the website would look like, some samples of which can be seen directly below.

After the design stage, I worked to build out the website in React, taking care to ensure the code is maintainable and easily modifiable for future developers and maintainers at INK.

I'm very interested in where augmented reality technology will go in the next few years, and in late 2020 I convinced myself to explore a little behind how it works. Using Python and a handful of SciPy libraries (Numpy, Matplotlib, OpenCV, Scikit), I created a toy AR implementation using concepts from linear algebra and computer vision. My implementation, though far from the quality of professionally developed software, is capable of (roughly) projecting simple shapes (e.g a cube) onto real world videos -- you can even try it on your own.

Users can select and label a number of keypoints to track over the length of the video, which is handled with OpenCV off-the-shelf trackers. For each frame, a least-squares homography matrix is calculated to extrapolate the tracked object's 3D orientation from the 2D image frame. This matrix is then applied to our AR shape, which returns the 2D location of each shape point within the frame. Finally, the shape's lines are drawn onto each frame, which are collected into a video output.

Click on this sentence to load the demo video (~40MB)

The code and some starter files can be found here.

I was fortuante enough to spend some of my winter 2019 holiday season in Iceland, a country with stunningly beautiful landmarks and geography. As I enjoy urban and landscape photography, this was an exciting opportunity for me to practice my camerawork and editing. Click here to see some more pictures in full resolution.

I was a Software Development Engineer intern in Fall 2021 (Sep - Dec), on the Amazon Music team. My project was to implement an experimental feature on the Web Player which would allow users to add multiple tracks at once to their playlist from a track recommendation widget, by clicking a single button ("Add All To Playlist" in the below screenshot).

I used TypeScript React to build the frontend component, and connected it to backend with Java.

I teach for CS 61C (Great Ideas in Computer Architecture), Cal's intro class to low level programming and CPU design (syllabus at cs61c.org). As a tutor, I taught small weekly sections to reinforce conceptual ideas and give students exposure to the types of problems they might encounter on homeworks or exams.

As a teaching assistant, I primarily taught labs, which gave students hands-on exposure to the languages, concepts, and tools they learn in lecture. I also assisted in other areas as needed (grading, proctoring, project development and support), most notably adding a unit testing framework in C to the class's first project which teaches C and memory management.

At ASML, I was a Software Engineer Intern on the High Performance Computing team, which manages and develops internal software for ASML's supercomputers and servers. My project was to develop a filesystem metadata analytics tool in Golang backed by an SQLite database. This tool would scan the entirety of ASML's distributed filesystems and collect information about directories -- their size, last modified date, file and subdirectory count, recursive file and subdirectory count -- into a database. This database could then be read by the program to reconstruct the filesystem in-memory, allowing the user to look at disk usage and find outliers, for example directories that are unusually large or that haven't been modified in a long time.

The main challenge in this project was that in order to scan all of ASML's filesystem in a reasonable time, the program had to be extremely parallelized so that the bottleneck would simply be I/O and not the program itself. I made heavy use of Golang's concurrency features (e.g goroutines and channels) to achieve this goal, ultimately reaching a scan rate of around ~50 thousand directories a minute. Additionally, the tree can be rapidly reconstructed in-memory with a light memory footprint; a 10-million directory database takes around 10 seconds to read and rebuild.