Ana Helena Sánchez Ramírez, Developer in Hillsboro, OR, United States
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Ana Helena Sánchez Ramírez

Verified Expert  in Engineering

Software Developer

Hillsboro, OR, United States
Toptal Member Since
August 18, 2016

Ana is a mobile developer with a master’s degree in computer science and who understands the meaning of responsibility and good teamwork. Her recent accomplishments deal with Android/iOS implementations which commonly use MVC architecture and the REST API. Design wise, her guiding principles are simplicity, speed, and efficiency.



Preferred Environment

Xcode, Vi, Eclipse, Android Studio, OS X, Linux

The most amazing...

...application that I've implemented was made for military purposes in where we kept track of the GPS position to save UXO data.

Work Experience

Senior Mobile Developer

2017 - 2018
  • Optimized mobile applications (Android and iOS).
  • Coded applications for the iPhone and Android market.
  • Led a team in the build of applications using best practices.
  • Maintained and repaired any bugs found.
  • Implemented test cases.
  • Worked in a collaborative environment using Git and Jira.
Technologies: Kotlin, Java, Android, Swift

Mobile Developer

2015 - 2017
  • Created Android applications using REST services, GPS positions, cameras, galleries, contacts, maps, SQLite databases, social, and third-party libraries.
  • Developed applications in Swift or Objective-C, using auto layout, core data, rest calls, animations, camera, gallery, and social and third-party libraries.
  • Supported Android/iOS projects.
  • Collaborated on web application development using C# and JavaScript for the front-end functionality.
  • Worked in a collaborative environment using Git, JIRA, and Trello.
  • Developed a web application using Node.js, Express.js, React, and Hapi.js.
  • Created Android functional and unit tests.
Technologies: Swift, iOS, Java, Android

Programmer Analyst

2013 - 2014
Oracle MDC
  • Worked with a Fusion CRM.
  • Created an API with PL/SQL to handle the resell rights on a Fusion CRM.
  • Built a bridge with PL/SQL to migrate relevant data between applications.
  • Developed APEX applications for our Oracle partners.
  • Communicated with clients.
Technologies: Apex, PL/SQL, SQL

Systems Engineer

2008 - 2010
  • Created a financial section for an IPN administrative web application and it's intranet. Starting from the design to the implementation. Technologies used: Toad and ColdFusion.
  • Developed a web application for internal IPN kinder garden control; including the design and implementation. Technologies used: Toad and ColdFusion.
  • Implemented a web page using Flash ActionScript 3.
  • Supported different internal web applications in ColdFusion or Java.
  • Created PDF reports and sent emails using Java.
Technologies: Oracle, Toad, Flash, Java, Adobe ColdFusion

SPS | Sixpack Shortcuts Training Application

This application was made on iOS Swift. (A module collaboration was also made in Android.) This application allows you to buy exercise programs, see the related videos, and keep control of your progress. You can schedule the programs and more. This is a project made in collaboration with the VanillaSys iOS team.

It uses REST, a camera, an SQLite database, the AV Framework, Facebook, G+ SDK, a calendar, and push notifications.

MYSTIC | Munitions Yoking Software Technological Information Core

An Android application to handle UXO data. It also has a small collaboration with the web application.


An Android application that holds the Beisbol (baseball) statistics of the Charros team of the LMP league.

The application allows you to see the real-time scores of the games. You can also see the latest news, check the calendar, review the tweets related to the team, or take a picture and share it on Twitter.

It uses REST, Facebook SDK, Twitter API, maps, directions, animations, a camera, a gallery, and push notifications.


This application is made in Objective-C and provides space to handle the recipes provided by Chef Oropeza. The user can select his favorite recipe, have control of them, save the ingredients, see it's nutritional table, and create his own cookbook. It also provides a menu or exercise plan given the user profile. Other features: search for recipes, filter based on ingredients, and an online store.

This app uses REST, Facebook SDK, core data, auto layout, animations, camera, gallery, and the Shopify SDK.


In this Android application, you can apply for a credit card and keep control of it. You can program the payments, pause the credit, and receive notifications.

It uses REST and the Facebook SDK.

This project dealt with the administrative control of IPN (an educational institution). I developed, in a team, the financial portion and designed it with the IPN rules in mind; specifically how money is distributed to the schools. For example, how the schools requested and spent their budgets, the reports, and the accounting.

I collaborated on the design process, database implementation, and web implementation. I used MVC for the web and the Entity relationship for the database data.


This application was made for the benefit of IPN workers who were also parents of CENDI (kindergarten) children. It was made for the parents and teachers to use in managing the CENDI children.

The application verifies data, checks availability, and provides a set of questionnaires so that the parent would have a health profile of their children. This also contains an activity and management system for the teachers.

I developed it with ColdFusion and SQL for the database. I also collaborated on how the design was made.

The RIV project supports a system that has control of the research residents' IPN.

I collaborated on the web page development which was implemented on Flash using ActionScript 3. The page would ask for user data which would then be sent using AJAX.

These are mobile applications for Voxfeed that reward you for recommending your favorite brands in social networks. I contributed to four applications, in total: Voxfeed for Influencers (Android and iOS) and Voxfeed for Brands (Android and iOS).

Voxfeed for Influencers
• Allows a user to connect to brands making proposals using their social networks.
Technologies: Google Analytics, Intercom, Fabric, Crashlytics, Mixpanel, Social Networks APIs (Facebook, Twitter, Instagram), YouTube Videos, Push Notifications, Sockets, REST API

Voxfeed for Brands
• Allows the brands to review the proposals and review the engagement behavior through graphs.
Technologies: Intercom, Crashlytics, Sockets, REST API
2014 - 2014

Incomplete PhD Degree in Computer Science (Security: High-Speed Cryptography on Embedded Platforms)

Radboud University Nijmegen - Nijmegen, Netherlands

2010 - 2012

Master's Degree in Computer Science

Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional - México City, México

2003 - 2008

Engineer's Degree in Telematics

Unidad Profesional Interdisciplinaria en Ingeniería y Tecnologías Avanzadas - México City, México


RxJava, RxSwift, Shopify API, GSON, iText, JavaMail, Node.js, jQuery, React


Android Studio, Android NDK, Jira, Bitbucket, GitLab, Open Office, Adobe Fireworks, Servlet, Eclipse IDE, GitHub, Trello, Flash, Gradle, Vim Text Editor, MATLAB, Adobe ColdFusion, Toad, Adobe Dreamweaver, Xcode


Android SDK, Jakarta Server Pages (JSP), JUnit, Flux, Express.js, Hibernate, Apache Struts, Hapi.js


REST, Extreme Programming, Test-driven Development (TDD), Model View Controller (MVC)


Swift, Swift 4, Java, Swift 2, APEX Code, ECMAScript (ES6), Java 8, XML, JavaScript, Kotlin, ActionScript 3, HTML, Objective-C, Apex, C, C#, SQL


Android, Firebase, Linux, Windows, MacOS, NetBeans, OS X, Eclipse, iOS, Oracle


JSON, PostgreSQL, MySQL, PL/SQL Developer, Oracle PL/SQL, Microsoft SQL Server, PL/SQL


AVFoundation, Microsoft 365, System Architecture, APIs, Ajax, Customer Relationship Management (CRM), Vi

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