Tim-Doerzbacher.com

I've developed a skill set varied enough to take any web-based idea from initial concept, to design, and all the way through development to the finished implementation. I'm most comfortable with open source software.

Contact Info

What I Can Do

Here's an annotated list of software, languages, and so forth that I've used. The battery icons indicate my level of comfort with a particular item.

Technologies

  • Agile Development
  • Building robots for fun
  • Database Design
  • Graphic Design
  • LAMP Environments
  • Linux Administration
  • /Regular Expressions/
  • Website Design
  • DurandalJS
  • Eclipse
  • ejabberd
  • Facebook APIs
  • FreeCAD
  • Git
  • Grep
  • Grunt
  • Jenkins
  • jQuery
  • Knockout
  • MediaWiki
  • MySQL/MariaDB
  • Nagios
  • NightwatchJS
  • NodeJS
  • Phabricator
  • PHPUnit
  • PostgreSQL
  • Python
  • QUnit
  • Rasbian
  • React
  • RequireJS
  • Selenium
  • Subversion
  • Symfony2
  • Thrift
  • Ubuntu
  • WordPress

Languages

  • Agile Development
  • Building robots for fun
  • Database Design
  • Graphic Design
  • LAMP Environments
  • Linux Administration
  • /Regular Expressions/
  • Website Design
  • DurandalJS
  • Eclipse
  • ejabberd
  • Facebook APIs
  • FreeCAD
  • Git

Skills & Techniques

  • Agile Development
  • Building robots for fun
  • Database Design
  • Graphic Design
  • LAMP Environments
  • Linux Administration
  • /Regular Expressions/
  • Website Design

Operating Systems

  • Agile Development
  • Building robots for fun
  • Database Design

Where I've Worked

Opus One Interactive

Senior Engineer

  • Added continuous integration tests to our build process
    • Integration tests are run using custom GitLab runners
    • Configured runners to run Selenium headless using Xvfb
    • NightwatchJS is used to drive the Selenium tests
  • Leading the graduation migration from legacy PHP code to PSR compatible code using Composer libraries
    • Moving to PSR compatible code was done for better code analysis, coverage, and code completion for quicker development
  • Fully automated release process
    • Used Symfony based console commands to automate the creation of release branches, and their associated merge requests via Gitlab's API
    • Upon successfully passing all tests and every thing is merged, a release tag is automatically cut and pushed.
    • Added Slack integration to alert developers to the progress of the release process.
  • Created and implemented roadmap to move the UI off of legacy CSS towards using Bootstrap 4 for styling
    • I did any necessary adjustments and modifications to Boostrap 4 to make it appear similar to the legacy styling.
    • Switching to Bootstrap alleviated styling inconsistency issues caused primarily from conflicting CSS rules in the old styling.
  • Added Bootstrap support to gradually move away from legacy libraries
    • Previously jQuery and Prototype were used to provide interactive functionality.
  • Database clean up
    • Previously, no foreign key checks were used causing database inconsistencies
    • Refactored code that relied on invalid IDs to implement tri-state logic
    • Added foreign keys and tests to ensure database sanity

Intermedix

Front End Engineer / Release Engineer

  • Redesigned and implemented new release engineering process.
    • Fully automated publishing of release assets.
    • Automated release emails by using ChangeLog.
    • Organized and developed a branching strategy for release and development.
    • Redesigned the Grunt project files into a modular structure and more easy to maintain structure.
    • Integrated Stash with Jenkins to enforce testing before merging.
    • Created automatic release process that is triggered by new commits or merges to the master branch.
    • Built and maintain Jenkins build slave.
    • Added additional linting rules and code to enforce consistency in the code.
  • Oversaw development of new major release of our product.
    • The original architecture was of a large, monolithic package which was prone to regressions.
    • Chopped the package in many smaller, more focused packages to allow downstream implementers more flexibility with upgrading and feature sets.
  • Designed and implemented visual regression tests to improve continuous integration.
    • The testing framework is shared, making any updates or the testing framework to be affected immediately in all existing and new modules
    • All demos in the documentation are automatically checked for visual regressions.
  • Evaluating and integrating additional third party libraries in the shared toolkit.
    • Automated patching and tweaking (when necessary) so that all libraries can be used seamlessly with RequireJS.

Walking Thumbs

Full Stack Developer

  • Integrating PHP and ejabberd based nodes and their respective database nodes into a custom XMPP-based messaging system.
    • Apache Thrift was used to enable direct communication between the PHP and ejabberd nodes.
    • ejabbard calls originally queried the database through Thrift calls to PHP. Rewrote to have the ejabberd nodes directly query the PostgreSQL cluster when possible.
  • Created syncing algorithm for finding other users on the system.
    • Hashing was used for matches instead of unencrypted contact information.
    • This was done to protect privacy concerns while still being able to match other users.
    • Normalized email and phone numbers to prevent false positives and maximize matches. This was extremely important since all contacts were stored only as hashes.
  • Improved and expanded automated testing suite; increased the code coverage and reduced the execution time.
    • Handled all server related tasks to support other developers working on the Android and iOS clients.
      • Set up Nagios on an AWS instance.
      • Installed, configured, and upgrading of servers.
    • Built automated server build scripts for use by the rest of the team, decreasing the server-side ramp up time for new app developers.
      • Handled overseeing implementing company websites.

        Kb Port

        Server & Web Developer

        • Handled UI design and implemention on several major software revisions.
          • Utilized HTML5/CSS3 for maximum compatibility in the future.
          • Previous versions were hacked to work on Internet Explorer with a proprietary Active X control.
        • Developed RAID-based archival system for compiling video sessions from network connected video recording products.
          • System has up to 14TB of storage allowing hundreds of days of recording video to be quickly searched, indexed, and shared.
          • Automated backups to the archival unit eases consolation of student videos and prevents the video records from filling up.
        • Developed customized customer management and inventory management software.
          • Features included allowing automated upgrades to systems out in the field to facilitate up-selling new products and features.
          • The system interfaced with copy protection code on the systems to prevent unauthorized cloning.
        • Designed a new video package format to allow exchange of data between the company's various products.
          • Designed to be easily extendable at future times to allow any type of metadata or otherwise to be added without breaking backwards compatibility.
          • Utilized OSS tools for maximum inter-compatibility on different platforms.

        Education

        Art Institute of Pittsburgh

        Graduated with Bachelor degree in Graphic Design

        References

        References available upon request.