Rolando Malena, .NET Developer in Cotui, Sánchez Ramírez Province, Dominican Republic
Rolando Malena

.NET Developer in Cotui, Sánchez Ramírez Province, Dominican Republic

Member since April 9, 2018
Rolando Malena has spent over eight years of experience developing applications using C# and has worked on nine projects for small and medium companies, developing desktop, web, and mobile applications. He specializes in developing desktop applications and web APIs as a back-end developer. He is very humble and eager to learn and grow more as a professional engaging with people and newer technologies as time goes on.
Rolando is now available for hire

Portfolio

Experience

Location

Cotui, Sánchez Ramírez Province, Dominican Republic

Availability

Part-time

Preferred Environment

Git, Microsoft SQL Server, Visual Studio, Windows

The most amazing...

...project I've worked on was maintaining a workflow for importing and massaging analytic data from 25+ sources (Web APIs) and regularly adding new sources.

Employment

  • Back-end Software Developer

    2018 - 2020
    IQzone (via Toptal)
    • Worked and maintained the external analytics import process to import and massage data from 25+ web APIs.
    • Implemented a retry mechanism on the above process to perform multiple attempts when requesting the metrics via HTTP requests improving the reliability by 200%.
    • Refactored 90% of the code for the above process increasing maintainability by 300%, saving significant time when implementing and/or updating external analytics sources.
    • Improved a telemetry data import process by designing and implementing a multi-threaded workflow that accelerated the import process by 300%.
    • Designed and implemented a web API that allowed an external portal to update saved publisher data, exchange mapping information, and retrieve publisher metrics.
    • Implemented workload to send specific saved data to a development environment through web requests, allowing us to test with real data without compromising it.
    • Updated the application settings workflow to hold values for multiple environments and the interpretation of such within the application.
    • Worked as part of a development team to improve the tools and user experience for the ad-operations team.
    Technologies: Subversion (SVN), Microsoft SQL Server, Visual Studio, Microsoft Power BI, ASP.NET, .NET, C#
  • Software Developer

    2012 - 2018
    Tienda Malena S.R.L.
    • Developed an inventory system to keep track of purchased and sold products that accelerated decision making by 500% while purchasing new products.
    • Supported reading and generating product barcodes incresing efficiency by 300% when selling products, dispatching customers three times faster.
    • Supported managing customers, invoices, payments, etc.
    • Maintained and enhanced such applications and made sure the software is always on production.
    • Managed database integrity.
    Technologies: Microsoft SQL Server, Visual Studio, Windows Presentation Foundation (WPF), .NET, C#
  • Software Developer by Contract

    2016 - 2017
    Centro Médico Núñez Hernández
    • Developed a new multiple inventory system to control inventory within multiple departments that reduced time in decision making by 800% deciding what merchandise was needed.
    • Implemented product management and purchases from the main department to easily look quantities of products on each department, reducing consulting time by 500%.
    • Implemented the ability to transfer products within departments, consume products on patients, etc.
    • Supported reading and generating product barcodes speeding up by 300% the process of reporting transfers between departments and consumed products.
    • Created a complex algorithm to manage the inventories from the database.
    Technologies: Microsoft SQL Server, Visual Studio, Model View Viewmodel (MVVM), Windows Presentation Foundation (WPF), .NET, C#

Experience

  • Payroll System for Meat Suppliers

    Developed a desktop application that allows users to register departments, occupations, employees, incentives, extra hours, discounts, etc. It generates a monthly reports with details of how much to pay each employee based on the data input.

    Technologies: C#, .NET Framework, WPF, MVVM, Visual Studio, SQL Server, Entity Framework

  • Online Repository for Teachers

    Developed an online repository that would allow registered teachers to upload files (Word documents, PowerPoint presentations, PDFs, Image files, etc.) as content for multiple subjects that would be downloadable in the future.

    Technologies: C#, .NET Framework, ASP.NET MVC, HTML5, CSS3, JavaScript, jQuery, Visual Studio, SQL Server, Entity Framework

  • SnapDog
    https://www.microsoft.com/en-us/p/snapdog/9nblggh4wr96

    Develop a UWP application that would allow its users to see and save locally funny pictures of dogs gathered from multiple sources that updates daily. It was a personal project.

    Technologies: C#, .NET Framework, UWP, MVVM, Visual Studio, SQL Server

  • Patient Management System for a Medical Dispensary

    Developed a desktop application so employees in a medical dispensary could register, diagnose, treat, and apply medications to patients.

    Technologies: C#, .NET Framework, Windows Forms, Visual Studio, SQL Server

  • Currency Calculator
    https://www.microsoft.com/en-us/p/currency-calculator/9nblggh0n8cs

    Developed a Windows Phone 8 application that would allow its users to convert between currencies with a few taps. It was later ported as a UWP to be able to download from the Microsoft Store. It was a personal project.

    Technologies: C#, .NET Framework, Windows Phone 8, UWP, MVVM, Visual Studio, SQL Server

  • eCommerce Website to Advertise Cars on Sale

    Developed a web application that users and companies could register to and buy advertisement plans to post any vehicle on sale to make it visible to many potential buyers.

    Technologies: C#, .NET Framework, Silverlight, WCF, Visual Studio, SQL Server

  • Online Encyclopedia of Mathematics for Children

    Developed an online encyclopedia that allowed authorized users to add and manipulate content (text, images, videos, hyperlinks) that would allow children to learn simple concepts in the field of mathematics.

    Technologies: C#, .NET Framework, Silverlight, WCF, Visual Studio, SQL Server

Skills

  • Languages

    C#, XAML, C#.NET, HTML5, JavaScript, CSS3, SQL, CSS, HTML
  • Frameworks

    Windows Presentation Foundation (WPF), ASP.NET, ASP.NET MVC, .NET, .NET Core, Bootstrap, Silverlight, Entity Framework Core, ASP.NET Core, ASP.NET Core MVC
  • Libraries/APIs

    Web API 2, Windows Forms, jQuery, Entity Framework
  • Paradigms

    Model View Viewmodel (MVVM), REST
  • Storage

    JSON, Microsoft SQL Server, Databases
  • Other

    API Integration, APIs, CSV, CSV File Processing, Full-stack
  • Platforms

    Universal Windows Platform (UWP), Windows, Azure
  • Tools

    Visual Studio, Git, Subversion (SVN), Microsoft Power BI

Education

  • Bachelor's degree in Computer Science
    2009 - 2015
    Instituto Tecnológico del Cibao Oriental (ITECO) - Cotuí

Certifications

  • Complete ASP.NET Core 2.1 Course
    FEBRUARY 2019 - PRESENT
    Udemy
  • Xamarin Forms – Build Native Cross-platform Apps with C#
    MARCH 2018 - PRESENT
    Udemy
  • The Complete ASP.NET MVC 5 Course
    JUNE 2017 - PRESENT
    Udemy
  • Introduction to MVVM
    OCTOBER 2015 - PRESENT
    Microsoft Virtual Academy
  • JavaScript Fundamentals for Absolute Beginners
    JULY 2015 - PRESENT
    Microsoft Virtual Academy
  • HTML5 & CSS3 Fundamentals: Development for Absolute Beginners
    JULY 2015 - PRESENT
    Microsoft Virtual Academy
  • Building Apps for Windows Phone 8 Jump Start
    JUNE 2013 - PRESENT
    Microsoft Virtual Academy
  • Programming with C# Jump Start
    MARCH 2013 - PRESENT
    Microsoft Virtual Academy
  • Microsoft Silverlight
    AUGUST 2012 - PRESENT
    Microsoft Virtual Academy
  • Software Development Techniques
    NOVEMBER 2011 - PRESENT
    McFree Consulting Group
  • Web Development with ASP.NET 4.0
    SEPTEMBER 2011 - PRESENT
    Instituto Tecnológico del Cibao Oriental (ITECO)
  • Programming with Visual C# 2010
    MARCH 2011 - PRESENT
    Instituto Tecnológico del Cibao Oriental (ITECO)
  • Databases with SQL Server 2008 R2
    SEPTEMBER 2010 - PRESENT
    Instituto Tecnológico del Cibao Oriental (ITECO)
  • Basic English
    DECEMBER 2008 - PRESENT
    Instituto Tecnológico del Cibao Oriental (ITECO)

To view more profiles

Join Toptal
Share it with others