Justin is a freelance software engineer and musician based in Oakland, CA.

I didn't want the user to experience the typical reload delay in navigating among parts of the site, so I designed it as a single-page application, where the "links" (about/portfolio/music) switch among the sections by adjusting the display style element to show or hide each section.

But I also wanted to be able to link to each section. So I wrote some JavaScript that generates three versions of this page, differing only in which section is initially visible. In addition, the script constructs the portfolio section from a skeleton structure and a dictionary of data for each portfolio entry.

Independent/solo

Published at http://justinfrancos.com

• HTML5/CSS3
• BootStrap 4
• Node.js
• jQuery

GitHub Repository

I wrote a calendar-scraping Python script, which lives on a Linode server. The front-end accepts online calendars that you specify by URL, uses AJAX and SSE to communicate with the Python script, combines the resulting calendar data and displays them by date.

Many libraries are utilized by the calendar scraper, including html2text, which I patched to include XPath-ish data with every node of text.

Independent/solo

Published at http://cs.justinfrancos.com

• Python
• HTML5
• jQuery/Ajax/SSE
• BootStrap 3
• GNU/Linux
• Selenium/PhantomJS
• Beautiful Soup
• NGINX
• Patching other people's software

Front-end JavaScript

Commissioned by Ryan Moore from The Globe Institute's Sound and Consciousness Program to automate the drawing of diagrams that he uses for his classes. They took him hours to create, now they take minutes.

The drawings consist of a circle with lines connecting (not necessarily adjacent) vertices of equilateral shapes along the circle's circumference.

Independent/solo

Published at http://justinfrancos.com/cyclicalpatterns

• jQuery
• HTML5
• BootStrap 3
• Single‑page application
• Trigonometry
• SVG

Front-end JavaScript

Epiphany School/solo

• Linux Administration
• LVM/RAID
• Hardware Configuration

Automated a musical ear training exercise I learned in high school, which originally required a tape recorder and many hours of preparation.

This is a rewrite/redesign of an earlier (2010) version, which was written in Objective-C.

Some technical points:

• Created custom controls
• Created interface programmatically using “constraints”
• Used lower level audio calls for instances where low-latency, synchronicity, and memory conservation were needed
• Addressed concurrency issues

1.53K units sold, 4.5 star rating (as of 3/8/2017)

Independent/solo

Ear Sharpener in the iTunes Store

• Swift
• XCode
• iOS
• Constraints
• Concurrency
• Low‑level audio

Independent/solo

Published at http://earsharpener.com

• JavaScript
• JQuery
• BootStrap 3

Front-end JavaScript

The principal wanted a permanent remote monitor mounted in her office. So I Installed Debian on an HDMI stick, and replaced X's login software with a script that ran 12 instances of mpv, each one accessing an RTSP stream from ZoneMinder and displaying in a 3x4 grid.

Epiphany School/solo

• Linux Administration
• Bash

There is a “brain fitness” game called “Dual N-Back”. I made a musical version of it called Dual N-Bach.

Independent/solo

Dual N-Bach in the iTunes Store

• Swift
• XCode

Eight year old laptops had hardware that was working fine but Windows XP was approaching end-of-life. So I wrote a set of scripts to be run against a fresh Linux Mint (Qiana) install, to make the laptops suitable for students and for being integrated into a Windows domain environment, which could then be used to image all ~100 laptops using a FOG server that I setup.

Scripts automated: Joining the domain using Centrify on first boot after imaging, customizing available applications, pre-configuring wireless connection, disabling text mode except for via "Magic SysRq", replacing mdm with lightdm, adding printers, replacing the boot logo, setting some Libre Office defaults, locking the background, and allowing an admin to access an xterm while a student is logged on.

Epiphany School/solo

• Linux Administration
• Bash

Independent/solo

• Linux/Bash
• Objective-C
• XCode
• SQLite

Automated a musical ear training exercise I learned in high school, which originally required a tape recorder and many hours of preparation.

I had to use C++ for some of the low-level audio, specifically to synchronize playback of multiple sounds.

This is an earlier version of the above (2015) version of Ear Sharpener.

Independent/solo

• Objective-C
• C++
• XCode
• iOS

From 2013 until 2016 I played keys with Johnny Blazes and the Pretty Boys, a funk/soul group consisting of many talented friends whom I love. During the three years that I was with them, we performed at Boston's Pride Festival, Salem's Pride Festival, The Slutcracker after party, closed out many burlesque shows at Oberon, and played at other venues around Boston/Cambridge/Somerville including Johnny D's, TT the Bear's, Radio, The Midway, Sally O'Brien's, Beat Brasserie, and ONCE/Cuisine En Locale.

We introduced our debut album, Soul Vernacular, in 2015. One of the tracks from the album, "Cold Clear Light", appears in the Harmonix video game Rock Band 4.

Soul Vernacular's title track:

In 2008 I composed and performed a classical style piano piece:

An atmospheric collaboration with Dana Colley (former Morphine) circa 2010. Dana on drums, alto and bari sax, me on Fender Rhodes:

From 2002 until 2006 I played keys in a rock band alongside some incredible musicians and songwriters. Here is a sample track:

A sad angsty song I wrote in high school:

In 2008 I collaborated with Ashley Clark and MIT's artist in residence Joe Davis on the short film "Making Fire", which screened at the 2008 Moscow International Film Festival.

Various other appearances and collaborations: