Diego is available for hire
Hire DiegoDiego Ferreyra
Verified Expert in Engineering
Software Developer
Location
Córdoba, Cordoba, Argentina
Toptal Member Since
January 24, 2013
Diego is an established software developer who has created successful apps and websites for a number of companies. He is a self-taught programmer with in-depth knowledge of a variety of web and mobile technologies. He has built game engines, phone applications, websites, and JavaScript apps.
Portfolio
IDEX
Highcharts, JavaScript, TypeScript, Angular, GitHub, Front-end Development...
AssetWorks
Angular, Material UI, Google Maps API, GitHub, TypeScript...
Stayafloat
Angular, Bootstrap, GitHub, TypeScript, Front-end Development, Material Design...
Experience
Availability
Part-time
Preferred Environment
Visual Studio, MacOS
The most amazing...
...software I've built is an isometric ActionScript 3 game framework on which future applications can be built.
Work Experience
Enterprise Web UI Developer
2020 - 2023
IDEX
- Developed core features for a web application that puts critical data at your fingertips to support management, engineering, and operational decisions within the wastewater collection system.
- Tracked and fixed bugs using the Azure tracking environment.
- Collaborated with the back-end engineers to connect and improve the API.
Technologies: Highcharts, JavaScript, TypeScript, Angular, GitHub, Front-end Development, REST APIs, Material Design, Front-end Architecture
Angular Engineer
2020 - 2020
AssetWorks
- Optimized maps for real-time marker updates and tracking for over 5,000 entities.
- Combined markers to show more advanced information, like type and direction, while moving.
- Improved and optimized components to avoid issues and help readability.
- Solved several performance issues with the company's Angular app.
Technologies: Angular, Material UI, Google Maps API, GitHub, TypeScript, Front-end Development, Front-end Architecture
Front-end Angular Developer
2019 - 2020
Stayafloat
- Handled all front-end development on a pre-started project and continued working and improving on it as the single developer.
- Improved the site to be mobile-first ready. Made sure all templates worked on tablets and phones.
- Created a small JSON parser for dynamic form creations.
Technologies: Angular, Bootstrap, GitHub, TypeScript, Front-end Development, Material Design, Responsive Design, Front-end Architecture
Front-end Developer
2018 - 2019
Sage Bionetworks
- Developed and maintained the site using Angular 7.
- Built a force chart in D3 for gene network viewing.
- Developed and optimized a bar chart in DC for gene RNA values.
- Stored the gene network in MongoDB with Express.js API management.
- Processed data transforming gene links into force network data.
Technologies: Angular, DC.js, D3.js, MongoDB, Node.js, GitHub, Front-end Development, REST APIs, Material Design, Responsive Design, Front-end Architecture
Full-stack JavaScript Developer
2017 - 2018
Trinity Mobile Networks
- Optimized Google Maps to host and update 10,000+ markers in real time.
- Developed several AngularJS features on the main portal.
- Implemented portal unit testing with Mocha and Chai.
- Implemented an ES6 transpiler for the AngularJS portal.
Technologies: Google Maps, Node.js, AngularJS, GitHub, REST APIs, Material Design
Ionic Developer
2017 - 2017
Visio Green (via Toptal)
- Developed the application from scratch, choosing to implement ES6 into an Ionic project that come out to worked really well and take advantage of it.
- Developed the project and its architecture from scratch.
- Turned wireframes into screens.
- Optimized information management across the platform.
Technologies: Firebase, ECMAScript (ES6), AngularJS, Ionic, GitHub, REST APIs, Responsive Design
Senior Front-end Developer
2016 - 2016
Lystnr.com (via Toptal)
- Developed a pixel-perfect landing page.
- Added new features to the AngularJS app, turning links into editable fields.
- Added new endpoints to the AngularJS app.
- Created new form templating.
Technologies: CSS, HTML5, AngularJS, Front-end Development, Responsive Design
Front-end Developer
2016 - 2016
Pampered Chef (via Toptal)
- Developed several apps in Angular 2.
- Improved templates for the client's main site in HTML5 and CSS.
Technologies: Angular, Webpack, ECMAScript (ES6), GitHub, TypeScript, Front-end Development, Material Design, Responsive Design
Full-stack Developer
2016 - 2016
Heal (via Toptal)
- Developed the client's portal web app from scratch.
- Set the architecture for the new AngularJS site.
- Turned wireframes into a working site.
- Helped with some UI/UX decisions.
Technologies: AngularJS, JavaScript, GitHub, Responsive Design
Full-stack Developer
2015 - 2016
Fapl (via Toptal)
- Worked along the CEO developing the main site and mobile app.
- Helped with the back-end implementation, suggesting and researching better and more secure methods.
- Implemented a secure file upload with Amazon S3.
- Developed several sections of the mobile and web app, which were both based in AngularJS.
Technologies: Amazon S3 (AWS S3), Express.js, Node.js, Ionic, AngularJS, GitHub, Responsive Design
Web Developer
2015 - 2015
Monsoon
- Used new frameworks like AngularJS and Ember.js.
- Specialized in CSS and responsive design.
Technologies: JavaScript, GitHub, Front-end Development, Responsive Design
Full-stack JavaScript Developer
2014 - 2015
Kidozen
- Worked with a Node.js back end for managing connectors and on the front-end side with a custom JavaScript framework. Got the opportunity to contribute to an ACE editor while working on Kidozen.
Technologies: JavaScript, REST APIs
JavaScript Developer
2012 - 2013
Motorola
- Worked with a custom framework.
- Had a great experience working in an Agile environment.
- Led the team and interviewed new developers.
Technologies: JavaScript
Mobile Developer
2011 - 2012
Blanco Martin & Assoc.
- Designed and developed a number of Android and iOS mobile apps using HTML5.
- Implemented a RESTful API during development of the apps.
- Made UI/UX design decisions.
Technologies: PhoneGap, JavaScript, CSS3, HTML5
UI Developer
2011 - 2012
Globant
- Developed a one-page JavaScript application for Intel AppUp using several different frameworks, including Ember.js, YUI, Backbone.js, and Node.js for the back end.
- Created a travel web page for AmEx using JavaScript, HTML5, and Ruby. The site included a vacation planning page, which gives users the option of booking hotels, flights, cars, and various travel packages.
- Developed SKL, a flash cards game for Facebook. Wrote the interface and data management aspects using ActionScript 3.
Technologies: CSS3, HTML5, PHP, JavaScript
ActionScript 3 Developer
2006 - 2010
MindSmack
- Developed a number of highly interactive sites and games using Flash, including RPG, action, and graphic adventure games.
- Created an entire ActionScript 3 framework for isometric games.
- Designed and coded several websites using HTML, CSS, and JavaScript.
Technologies: ActionScript 3
Web Developer
2003 - 2005
TecnoImagen
- Built dynamic websites from scratch using Flash and XML for several companies.
Technologies: Microsoft Access, Active Server Pages (ASP), ActionScript 2
Experience
StayAfloat
http://stayafloat.ioI was the solo front-end developer here in charge of creating and maintaining the entire site. The application was built using Angular 6 and Bootstrap for mobile-ready functionality.
Agora
https://agora.ampadportal.org/genesAngular application for the studies of brain genes related to Alzheimer's.
Heal
https://patient.heal.com/Developed the front end of a patient portal from scratch using AngularJS. They introduced me to the John Papa Angular style guide, which was really interesting and helped improve my skill.
Fapl, Co.
Worked with the team on the early stage of the web and mobile app development.
I worked really close to the CEO and was able to participate in the architecture of the apps really actively.
I worked really close to the CEO and was able to participate in the architecture of the apps really actively.
Pampered Chef
http://www.pamperedchef.comWorked on several projects with Angular 2. I was new to that technology, but learned a lot during the process.
I also helped on templates to improve the main site.
I also helped on templates to improve the main site.
Lystnr
Developed the new landing page and added new features to the existing Angular app.
Swyp Card
Developed the landing page.
Intel AppUp
I was involved in the development of several Intel AppUp prototypes. This involved implementing an MVC design and writing APIs using Node.js and MongoDB. I also wrote code for the front end using the Ember, YUI, and Backbone.js frameworks. Additional work included a number of UI/UX bug fixes, as well as using Redmine to track and address bugs in the code.
AmEx Travel
https://travel.americanexpress.com/homeI wrote the front-end UI for the travel portion of the AmEx website using JavaScript, HTML5, and CSS3. Its features include infinite scrolling for hotel search results as well as an API for the Ruby back end.
To-do App | Backbone and SlimPHP Framework
https://github.com/gatof81/Backbone-SlimPhp-Todo-AppThis project features a user-friendly to-do app that uses Backbone.js on the front end and the SlimPHP framework for the API and back-end services, creating a well-structured, user-friendly, and high-performance application.
MindSmack Madness
This is a high definition company promotion website that behaves like an interactive movie. I was the sole developer on the project and implemented an object-oriented approach in ActionScript 3 that included lazy loading, preloading, and video streaming features.
Polaner
This is a website for which I wrote the front-end code using HTML5, CSS3, and Flash.
Ortega
This is a web page for cooking recipes that I developed using Flash, ActionScript, and an XML parser.
Portal Vecino
This is an Android and iOS mobile app that I developed from scratch using PhoneGap with HTML5, CSS3, and JavaScript. It uses a SugarCRM back end and allows users to upload road traffic tips. It also includes a geolocation feature.
Water Collection Systems Data Collection and Analysis
https://www.adsprism.com/welcomeI spent over three years developing an app using the latest Angular framework. I created new features and did bug fixing and optimizations on an ever-growing app that included GIS maps, charts, and a lot of data analysis tables.
Skills
Languages
SCSS, CSS, Sass, CSS3, JavaScript, HTML5, HTML, ECMAScript (ES6), TypeScript, Less, PHP, ActionScript 3, ActionScript 2, Active Server Pages (ASP)
Frameworks
Bootstrap 3+, Bootstrap 3, Bootstrap, AngularJS, Angular, Angular Material, Material UI, JavaScript MVC, PhoneGap, Ionic, Express.js, Next.js, Svelte
Libraries/APIs
jQuery, RxJS, Google Maps, Highcharts, Google Maps API, Backbone.js, Node.js, RequireJS, D3.js, Google Maps JavaScript API 3, Google Maps API (GeoJSON), REST APIs, DC.js, Handlebars, JavaScript API for Chrome, React, Stripe, Stripe API, NgRx, NgRx/store
Tools
Git, Slack, Gulp, Bitbucket, GitHub, NPM, Confluence, Webpack, Sublime Text, Angular CLI, Atom, Grunt, Mercurial, Microsoft Access, Visual Studio, Jira, Adobe Photoshop, Adobe Illustrator, Sketch, AWS CodeCommit, Pixelmator, Figma
Paradigms
Agile Software Development, Responsive, BEM, Event-driven Programming, Unit Testing, Search Engine Optimization (SEO), Asynchronous Programming, Object-oriented Programming (OOP), Design Patterns, Mobile Development, Prototype-based OOP
Other
Angular Bootstrap, Vine API, Mega, Front-end, Front-end Development, Cordova, Angular Component Architecture, Full-stack, Google Maps Styling, APIs, API Integration, Data Visualization, Material Design, Responsive Design, Front-end Architecture, PSD to HTML, Yam, Illustration, Web UI
Platforms
MacOS, Firebase, Azure
Storage
JSON, Amazon S3 (AWS S3), MongoDB, MySQL, SlimPHP
Industry Expertise
Photography
Education
2004 - 2007
Bachelor's Degree in Multimedia Design
La Metro - Cordoba, Argentina
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