Tomas Casas
Verified Expert in Engineering
PHP Developer
Córdoba, Cordoba, Argentina
Toptal member since December 20, 2013
Tomas is a software engineer with a passion for problem-solving. He's had the opportunity to work with OOO and functional paradigms. For the last 15 years, Tomas has been doing web applications using PHP and JavaScript. He then focused on JavaScript for SPA and moving and redesigning a React SPA using ClojureScript. He has been a contractor for US-based companies, corporations, and startups for over 10 years.
Portfolio
Experience
- Unit Testing - 8 years
- JavaScript - 8 years
- Integration Testing - 6 years
- PHP 5 - 5 years
- React Redux - 4 years
- ClojureScript - 3 years
- Reagent - 1 year
- Material UI - 1 year
Preferred Environment
GitHub, Visual Studio Code (VS Code), React, Material UI, Create React App, Webpack, Node.js, Microservices, Docker, Kubernetes
The most amazing...
...things I've developed are a SQL tokenizer to filter and sort in-memory objects and a pop-under by injecting code to a new about blank tab.
Work Experience
Senior Software Engineer
Skafos
- Collaborated with the front-end team in creating and supporting a components' library, CRA, and Next.js apps. Deployed CRA apps as static assets served from GCP storage. The Next.js app was deployed to Heroku.
- Transitioned all FE repositories into a single mono repository for easier code reuse.
- Designed and crafted the billing microservice for Shopify's usage-based charges using routers, handlers, and DAOs.
- Learned a lot about the MS ecosystem with Docker images running in Kubernetes containers in GCP. Collaborated with the front-end team in creating and supporting components' library and CRA and NextJS apps.
UI/UX Developer
Roomkey
- Migrated the leading site from React and Redux to CLJS using Reagent and reframed together with Material UI.
- Collaborated transition from Backbone to Redux and React with new features. The process started by moving away from Grunt to Webpack to deal with packaging the app and rendering HTML templates. That helped build Node.js and Express.js skills.
- Ported a hotel meta-search site from a proprietary framework to Backbone with responsive design and helped build a proprietary state controller stack to deal with app state and browser history.
- Supported a Google Chrome price check extension checker, Scout.
- Assisted unit and integration tests using Mocha and Cypress.
- Held up a component to trigger pop-unders and tab-switches on partner sites.
Team Leader, Web Developer
Walt Disney Parks and Resorts Online
- Coordinated tasks for a group of five PHP and four QA developers and supported the overall interaction of four engineers with the client.
- Received client specifications and discussed them with client product owners and business analysts.
- Worked on app performance using REST request parallelization and resiliency to handle the event of service degradation.
- Worked on a calendar jQuery plugin.
- Created other frameworks and libraries, including the Zend Framework 1.x, Guzzle, jQuery, and Mustache.
Partner Contractor
Threevoice – FlamingoTV
- Developed web UI and core components to enable the company to provide prepaid and postpaid VoIP services.
- Created a client dashboard on top of Zend 1.x and Doctrine2.
- Managed OpenSips and the Asterisk configuration through Web UI.
- Built Java handlers implementing a radius dictionary for billing (created by another colleague).
- Mirrored two stand-alone servers with one acting as master and the other as slave. Implemented them to switch roles in the case of unavailability events.
Consultant
The World Bank
- Helped to adapt the wage model for the Peruvian government.
- Helped to adapt the wage model for Antigua and Barbuda's government.
Web Developer
Elinmobiliario.com
- Created a web UI to manage email marketing campaigns.
- Created a "threaded" console daemon using a Unix fork to handle email processing (client use of PHP required).
Web Developer
ZonaProp
- Created an application responsible for mapping real estate attributes from a client app using ZonaProp web services DTD.
Web Developer, Technology Integrator, Partner
Threevoice
- Created a solid state PBX built on top of the NanoBSD OS with MySQL for data and LightTPD as web server.
- Developed the PHP 5.2 user interface to manage users, groups, IVRs, and terminations.
- Added a remote deployment of new releases and license management.
- Created a C++ extension for SEMS to enable prepaid calling cards.
Contractor, Business Analyst, Developer
Lockheed Martin Aircraft Argentina SA
- Resumed efforts pursuing short-term manufacturing plans based on resource availability.
- Created proofs of concept with ASP.NET and C# to leverage product configuration and midterm planning.
Consultant
The World Bank
- Helped in the adaptation of the wage model for Paraguay's Government.
Business Analyst
Vates SA
- Worked to mock a prospective new product for the company.
- Prepared proposals for the public sector, including local and nonlocal biddings.
- Prepared use case analysis for a Transantiago (Chile) project working for Siemens Itron. Helped with Java business rules coding.
Junior Professional Associate
The World Bank
- Handled IT support for LCSHD.
- Collaborated with the “ITC for State Strengthening” terms of reference and project structure.
- Provided statistical analysis infrastructure through terminal services.
Business Analyst, Systems Analyst
Harriague y Asociados
- Helped with manufacturing system analysis and design.
Contractor, PM, Business Analyst, Developer
Lockheed Martin Argentina SA
- Prepared and won a bidding offer for a manufacturing system.
- Negotiated requirements and project boundaries and integration to existing apps with client.
- Analyzed and developed with a team of two other developers to create a platform to handle product configuration and an MRP level 2.
Partner
QGroup
- Built several projects related to product configuration and BOM.
- Created a distance learning platform proof of concept for my university.
- Developed a site for client invoice orders (Richetta SA - Sonepar Distribution).
Experience
Roomkey
Tech stack: CLJS, Reagent, Reframe, React, Redux, Clojure, Datomic
Walt Disney Parks and Resorts Online
http://disneyworld.disney.go.comFlamingo VoIP Telephony Platform
Bandin and Alfa Real State Franchise Property Ads
Elinmobiliario.com Email Marketing Campaigns
Siemens Itron - Transantiago
https://es.wikipedia.org/wiki/TransantiagoSIP/IPS - Integrated Production System
Education
Master's Degree in Supply Chain Management and Technology
Universitat Ramon Lull - La Salle - Barcelona, Spain
Systems Engineer Degree in Systems Engineering
Instituto Universitario Aeronautico - Cordoba, Argentina
Coursework in Electronics Engineering
Universidad Nacional de Cordoba - Cordoba, Argentina
Skills
Libraries/APIs
Doctrine 2, React, React Redux, Preact, Backbone.js, Underscore.js, jQuery, Sinon.JS, Chai, REST APIs, RADIUS, Node.js, jQuery UI, SyncJS, Mustache, Immutable.js
Tools
Microsoft Access, Adobe Photoshop, Apache, GitHub Pages, Eclipse IDE, Git, Perforce, MySQL Workbench, Asterisk, Atom, Reagent, JavaScript Debugging, WebdriverIO, Microsoft Excel, GitHub, Adobe Illustrator, Apache Tomcat, Mocha, Mercurial, Apache Ant, CorelDRAW, CVS, IBM Rational Rose, Inkscape, lighttpd, Subversion (SVN), Sublime Text 2, MongoDB Atlas, Create React App, Webpack, Google Kubernetes Engine (GKE), Docker Swarm, Docker Hub, CircleCI
Languages
Visual Basic 6 (VB6), SQL, JavaScript, VB.NET, JavaScript 6, JavaScript 5, PHP 5, Visual FoxPro, Visual Basic for Applications (VBA), HTML5, CSS, HTML, PHP, CSS3, Excel VBA, UML, C#, JADE, Java, BASIC, C++, Pascal, Sass
Frameworks
Redux, Zend Framework, Rational Unified Process (RUP), NHibernate, Hibernate, Compass, ClojureScript, Cypress, OpenSIPs, Symfony 2, Bootstrap, Guzzle, CodeIgniter, ASP.NET, Slim, Yii, Material UI, Re-frame, Next.js
Paradigms
Object-oriented Programming (OOP), RESTful Development, Agile Software Development, Prototype-based OOP, Unit Testing, REST, Procedural Programming, Functional Programming, Continuous Integration (CI), OLAP, Scrum, Behavior-driven Development (BDD), Dependency Injection, Inversion of Control (IoC), Microservices, Design Patterns
Platforms
NetBeans, Windows, Unix, Windows Server, MacOS, Visual Studio Code (VS Code), Ubuntu, iOS, FreeBSD, Oracle, Docker, Kubernetes, Amazon Web Services (AWS)
Storage
MySQL, Microsoft SQL Server, ADABAS, SQLite, PostgreSQL, Redis, MongoDB
Other
Web Development, Enterprise Architecture, Integration Testing, Front-end Development, Use Cases, Terminal Servers, Sippy Softswitch, PGP, IRC, IIS, Prototyping, VoIP, Unix Shell Scripting, WebSockets, Business Requirements, Systems Engineering
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