Duvid is available for hire

Duvid Rottenberg

Verified Expert in Engineering

Back-end Developer

Location

New York City, NY, United States

Toptal Member Since

January 26, 2022

Duvid is a self-taught software developer with 15 years of experience specializing in back-end systems with C# and SQL in a New York-based telecommunications company. He also teaches a full-stack development course covering ASP.NET MVC, C#, and jQuery. Duvid enjoys learning how to utilize cutting-edge technologies on an ongoing basis.

C#SQL .NET FreeSWITCH .NET Core JavaScript ASP.NET MVC jQuery VoIP HTML5 Linux Windows Microsoft SQL Server

Portfolio

ICA Institute

ASP.NET MVC, C#, HTML5, Microsoft SQL Server, jQuery

Xchange Telecom

C#, SQL, JavaScript, ASP.NET MVC, APIs, API Integration...

Experience

.NET - 15 years SQL - 15 years APIs - 15 years C# - 15 years HTML5 - 10 years JavaScript - 10 years ASP.NET MVC - 10 years .NET Core - 5 years

Availability

Part-time

Preferred Environment

Windows

The most amazing...

...system I've developed was for remote elementary school classes during the COVID-19 pandemic.

Work Experience

Instructor

2020 - PRESENT

ICA Institute

Taught a course in full-stack development using ASP.NET MVC, C#, HTML5, and jQuery.
Developed the curriculum to help students understand what's going on under the hood as they worked toward becoming professional developers.
Mentored students who needed additional assistance with their studies.

Technologies: ASP.NET MVC, C#, HTML5, Microsoft SQL Server, jQuery

Senior Developer

2007 - PRESENT

Xchange Telecom

Developed an IVR engine that incudes high-volume conferencing capabilities.
Created an automated system for provisioning telecom services.
Integrated with many third-party systems using a wide variety of API technologies.

Technologies: C#, SQL, JavaScript, ASP.NET MVC, APIs, API Integration, Interactive Voice Response (IVR)

Experience

IVR System with High-capacity Conferencing

A menu-driven phone system I developed with high stability and high capacity. The system can handle conferences with thousands of participants. Many schools used this Xchange Telecom system for remote classes during the COVID-19 pandemic.

Skills

Languages

C#, SQL, JavaScript, HTML5

Frameworks

.NET, .NET Core, ASP.NET MVC

Tools

FreeSWITCH

Libraries/APIs

jQuery

Other

APIs, API Integration, HTTP REST, VoIP, Interactive Voice Response (IVR)

Platforms

Linux, Windows

Storage

Microsoft SQL Server

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