toptal.com
Contact us: +1.888.867.7001
Steven Kryskalla, Software Developer in Commerce Charter Township, MI, United States
Steven Kryskalla

Software Developer in Commerce Charter Township, MI, United States

Member since November 10, 2014
Steven is a full-stack software engineer and web developer with nearly a decade of experience working on large consumer projects for some of the world's most easily recognizable companies. Recently focused on DevOps, he is a smart and personable professional who can tackle solo or team challenges with equal ease.
Steven is now available for hire
Hire Steven

Portfolio

  • Dropbox
    Bash, Bitten CI, Trac, VMware vSphere, Jenkins, Puppet, Python
  • CommandIQ
    RQ, Redis, Boto, AWS S3, Redshift, Amazon EC2, Python
  • Lumosity (Lumos Labs)
    CentOS, HAProxy, Graphite, Nagios, Python, Redis, MySQL, Chef...

Experience

Location

Commerce Charter Township, MI, United States

Availability

Part-time

Preferred Environment

Terminal, Linux, Git, Firefox, Vi

The most amazing...

...thing I built in 24 hours was a distributed MySQL traffic replayer (dumping packets, parsing the MySQL protocol, filtering, distributing queries to clients).

Employment

  • Software Engineer, Release Engineering

    2015 - 2017
    Dropbox
    • Operationalized and automated manual processes related to desktop client builds (Windows, Linux, and OSX).
    • Maintained and improved the existing build system (Trac, Bitten, py.test) for desktop clients.
    • Designed and deployed a new desktop client build system using Jenkins, VMware vSphere, and Python.
    • Participated in on-call rotation for build issues.
    • Wrote custom puppet modules for OS X and Linux to provision build infrastructure.
    Technologies: Bash, Bitten CI, Trac, VMware vSphere, Jenkins, Puppet, Python

  • Senior Back-end Engineer

    2014 - 2015
    CommandIQ
    • Improved the reliability and functionality of back-end systems (data processing pipeline).
    • Used auto-scaling groups for deployment (Netflix-style red/black deploys of new AMIs).
    • Integrated Rollbar for better visibility of platform errors and exceptions.
    • Added monitoring via CloudWatch.
    • Managed a Redshift data warehouse cluster (data loading, unloading, monitoring, cluster resizing, etc.).
    Technologies: RQ, Redis, Boto, AWS S3, Redshift, Amazon EC2, Python

  • Senior Software Engineer, Operations

    2012 - 2014
    Lumosity (Lumos Labs)
    • Fixed hardware failures, network failures, MySQL and Redis crashes, bad deploys, DDoS attacks, failed maintenance windows, and more at all hours of the day.
    • Managed 150 dedicated servers (dedicated hardware from SoftLayer).
    • Sharded and scaled clusters for MySQL, Redis, and Memcached.
    • Added automation and monitoring for all levels of the stack.
    • Managed configuration with Chef and Ansible.
    Technologies: CentOS, HAProxy, Graphite, Nagios, Python, Redis, MySQL, Chef, Ruby on Rails (RoR)

  • Software Engineer, Operations

    2011 - 2012
    Lolapps
    • Rewrote copy-pasted Bash deployment scripts as clean, re-usable Python code (with Fabric).
    • Migrated internal Subversion repos to Git and GitHub.
    • Set up a continuous integration and deployment system using Jenkins.
    • Implemented automated rolling of MySQL table partitions to safely rotate out old data on live database servers.
    • Helped manage 200+ dedicated servers in many capacities including provisioning, automation, and maintenance.
    Technologies: HAProxy, Memcached, MongoDB, MySQL, Bash, Fabric, Pylons, Python

  • Software Engineer

    2008 - 2011
    ePrize
    • Built online promotions for top brands such as Xbox, Disney, Gap, Condé Nast, Dell, and Coca-Cola.
    • Led development on Xbox Live Rewards.
    • Built custom CMS and internationalization functionality on top of Django.
    • Did back-end engineering work for large scale email marketing campaigns via ExactTarget.
    • Developed Facebook applications.
    • Integrated and built data exchanges for clients using a broad range of technologies (SOAP, REST, SFTP, Java, C#, Perl, Python, etc.).
    • Created custom reports and dashboards for clients to help them visualize their programs' metrics.
    Technologies: Twitter API, Facebook Open Graph API, MySQL, SOAP, REST APIs, Django, Python, JavaScript, Perl

  • Robotics Lab Assistant

    2005 - 2007
    Lawrence Technological University
    • Built software to generate thousands of pages of printed material for Robofest competitions (certificates, name badges, signs, etc.).
    • Did web development for Robofest.net using Java, JSP, and Python.
    • Taught classes and led workshops on robotics for people of all ages (grade school through adult).
    • Helped organize and run Robofest events.
    • Conducted systems administration for robotics and computer labs on campus (Linux, Windows, Solaris).
    Technologies: SVG, Robotics, C++, C, Python, Java

Experience

  • Journal of Brief Ideas
    https://github.com/physicsdavid/journalofbriefideas

    An open access journal (like arXiv) for scientific ideas. Winner of the Communications category at Science Hack Day SF 2013.

  • OpenXC Taximeter
    https://github.com/lost-theory/ingenuity-taxi

    A program that shows drivers the real-time cost of their trip using data from OpenXC. Winner of Best Use of Data at BoingBoing Ingenuity 2013.

  • Xbox Live Rewards

    Microsoft's loyalty program for Xbox Live members. I built out the back-end (integrating with Xbox Live and partners), CMS functionality and internationalization, and front-end features (surveys, data visualization, other interactive functionality).

  • Disney Movie Rewards
    http://www.disneymovierewards.go.com/

    Disney's movie rewards program. I performed maintenance and built out custom functionality including custom reporting, promotions, and integration with Disney and other vendors.

  • My StackOverflow profile
    http://stackoverflow.com/users/75956/lost-theory

    Rated top 10% for Python development.

Skills

  • Languages

    Python, JavaScript, SQL, Bash, Java, C, C++, Ruby, Perl

  • Frameworks

    Flask, Pylons, Ruby on Rails (RoR), Django

  • Tools

    Nagios, GitHub, Git, Mercurial, Terminal, Chef, Boto, Puppet, Jenkins, VMware vSphere, Trac, Subversion (SVN), Adobe Photoshop, Audacity, Paint.NET, Inkscape

  • Platforms

    Linux, MacOS, Firefox, CentOS, Amazon EC2, Android, Windows, Mailgun

  • Storage

    Redis, Memcached, MySQL, AWS S3, Redshift, PostgreSQL, MongoDB

  • Other

    Graphite, Vi, HAProxy, SOAP, Robotics, SVG, Bitten CI, Tornado

  • Paradigms

    DevOps, Object-oriented Programming (OOP), Functional Programming, Agile Software Development, Asynchronous Programming, Scrum, Concurrent Programming

  • Libraries/APIs

    Fabric, REST APIs, Facebook Open Graph API, RQ, Twilio API, Twitter API, Underscore.js, jQuery, Facebook API

Education

  • Bachelor of Science Degree in Computer Science with a minor in Mathematics
    2003 - 2008
    Lawrence Technological University - Southfield, Michigan

To view more profiles

Join Toptal
Share it with others
Hire the top 3% of freelance developers TM