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James Koshigoe

James Koshigoe

San Francisco, CA, United States
Member since February 27, 2014
James is a software engineer and consultant focused on web development. He has over a decade of experience in both startup and enterprise business environments building solutions where full-stack skills, creative thinking, and high attention to detail are key, and fast turnaround is paramount.
James is now available for hire
  • JavaScript, 12 years
  • CSS, 12 years
  • Ruby, 4 years
  • Node.js, 4 years
  • Ruby on Rails (RoR), 4 years
  • React, 3 years
  • TypeScript, 2 years
  • Python, 2 years
San Francisco, CA, United States
Preferred Environment
IntelliJ, Vim, Git, Mac, Linux
The most amazing...
...system I've ever built is an enterprise permission system providing security to every instance of data while maintaining scalability.
  • Full-Stack Software Engineer Consultant
    2014 - PRESENT
    • Architected and led a development team building a Spotify-like application for a Series-A funded startup using Node.js, Electron, and React.
    • Worked full-stack on the team to develop a consumer-facing review platform with Node.js, React, GraphQL, Elasticsearch, and PostgreSQL.
    • Built optimization algorithms to automate advertising campaign management using Facebook's Marketing API, Python, Django, and PostgreSQL.
    • Built a bidirectional shipping integration API with Ruby on Rails for a very large affiliate network corporation.
    • Managed multiple overseas engineering teams using Agile practices.
    Technologies: JavaScript, TypeScript, React, Node.js, Ruby on Rails, Python 3, Django
  • Senior Software Engineer
    2013 - 2014
    • Automated and optimized as much of IMM's manual processes as possible so IMM's talent could focus on what they do best.
    • Provided technology and architectural experience to build core infrastructures upon which other developers relied.
    • Built high-traffic websites for IMM's digital marketing campaigns for well-known brands such as TracFone, Chili's, On The Border, DirectBuy, and more.
    Technologies: PHP, Zend Framework 2, PHPUnit, JavaScript, Node.js, Ext.js, MySQL, Git, SVN
  • Lead Developer
    2011 - 2013
    InvitedHome (formerly Vacation Rental Partner)
    • Paved a path and began moving the entire codebase from CakePHP to Ruby on Rails. Re-architected it and kept business needs moving forward.
    • Integral in building the back-end and parts of the front-end for a new guest-facing site, enabling VRP to pivot its business model.
    • Built custom feeds using REST, JSON, and XML to list VRP’s properties on HomeAway, FlipKey, and SkipJump through their proprietary APIs.
    • Built accounting tools to automate manual tasks that previously cost the CEO numerous hours every month.
    Technologies: Ruby on Rails, PHP, CakePHP, PostgreSQL, RSpec, jQuery, Git
  • Website Developer, Consultant
    2010 - 2011
    Denver Homes Online
    • Worked with the client from the ground up to craft several web designs and implement them in a foundation the client could maintain.
    • Trained the client in digital marketing fundamentals, including key concepts of SEO and proper usage of analytics to track the performance of campaigns.
    Technologies: PHP, Concrete5 CMS, SEO, Photoshop
  • Founder
    2009 - 2009
    • Developed from scratch an MVC framework in PHP, complete with a custom ORM.
    • Built a social network foundation with user profiles. Implemented commenting and friending features.
    Technologies: PHP, MySQL, jQuery UI, SVN
  • Website Developer
    2008 - 2008
    Sito Marketing/American Vending Systems
    • Created and concurrently managed all the technical needs of ten websites.
    • Built a specialized CMS in PHP that allowed for fast generation of hundreds of landing pages.
    • Integrated leads coming from various sources into a Customer Relationship Management (CRM) system using PHP and a REST API.
    Technologies: PHP, MySQL, jQuery, Python, SVN, SugarCRM, WordPress
  • Website Developer
    2007 - 2008
    Colorado Home Helper
    • Developed a system for real estate agents to email clients custom home search reports using an AJAX-based interface and PHP/MySQL back-end.
    • Developed and further customized an existing PHP-based MLS to allow visitors to register and save searches. Integrated featured listings and improved overall functionality and usability.
    Technologies: PHP, MySQL, jQuery, SVN
  • RelatedJS (Development)

    A set of data structures used to manage complex relationships in JavaScript.

  • Praisee (Development)

    Praisee is a community dedicated to giving consumers a voice to share their reviews, ask questions, and find answers to all products

    I co-founded Praisee and wrote the service from scratch on top of React.js, GraphQL/Relay, Node.js, TypeScript, PostgreSQL, Redis, and Google Cloud Platform. The front-end is isomorphic and the back-end is a custom scalable architecture designed for the unique batch data loading and authorization needs of GraphQL.

  • MetricLift (Development)

    MetricLift automates advertising on Facebook by continuously sampling audiences and adjusting spend across hundreds of multivariate ad sets. We've been able to increase conversions for clients anywhere from 1.5x to 2x. I built the back-end with Python/Django which talks to various APIs such as Facebook's Marketing API and HubSpot's APIs.

  • Portfolio and Code Samples (Development)

    A variety of previous projects and code samples to view.

  • Languages
    JavaScript, Ruby, CSS, ECMAScript (ES6), TypeScript, PHP, SQL, Sass, Less, ES7, Python, GraphQL, C, C++
  • Frameworks
    Ruby on Rails (RoR), Express.js, Flux, Redux, Electron.js, Django, Relay, Laravel, AngularJS, PHPUnit, Bootstrap, Swagger
  • Libraries/APIs
    Node.js, React, jQuery, MobX, Facebook Marketing API, Facebook API, Facebook Ads API, Socket.IO, Authorize.Net, Devise, Pandas, SQLAlchemy, Stripe API, Stripe, NumPy
  • Tools
    Git, Adobe Photoshop, JSX, Vim Text Editor, RSpec, JIRA, Browserify, Babel, Chrome Developer Tools, Mocha, Balsamiq, Moqups, Elastic, Google Analytics, Apache, Nginx, Gulp.js, Grunt, Trello, Sketch, InVision, Jupyter, IPython, IPython Notebook
  • Paradigms
    Agile Software Development, Object-oriented Programming (OOP), REST, Responsive Web Design (RWD), Agile, SOLID Principles, Functional Programming, Model View Controller (MVC), Scrum, Kanban, Search Engine Optimization (SEO)
  • Other
    Front-end, RESTful Web Services, Digital Marketing, Facebook Ads, Social Media, User Experience (UX), Facebook Marketing, SEM, Customer Acquisition, PIP, Facebook, HubSpot, Google Tag Manager
  • Platforms
    Linux, Mac OS, Heroku, Windows, Docker, Ubuntu, Ubuntu Linux, CentOS, Google Cloud Platform, Jupyter Notebook, WordPress
  • Storage
    MySQL, PostgreSQL, Elasticsearch, MongoDB, SQLite, Redis
  • B.S. (incomplete) degree in Computer Science
    2010 - 2012
    University of Colorado Boulder - Boulder
  • B.S. (incomplete) degree in Computer Science
    2006 - 2008
    University of Colorado Denver - Denver
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