Alex Tushinsky

Alex has spent the past 30+ years working as a software developer, application architect, cybersecurity professional, and technical trainer. He is a lifelong learner and holds over 20 active certifications in IT. Alex is a Microsoft Certified Trainer and enjoys sharing his knowledge with others. He has taught at Rutgers University, Bergen Community College, County College of Morris, College of Southern Nevada, and UNLV. He holds a BS in Software Development and a Masters in Cybersecurity from Western Governors University. As a developer, Alex works with Java, C#, and Python helping small businesses and entrepreneurs achieve their vision from a technical perspective. He also works as a virtual CISO, performs penetration testing, and educates businesses and individuals on the importance of cybersecurity. When not working, Alex spends his time with his beautiful wife, and many pets, including two cats, and three Boston Terriers. He is an active runner and cyclist and is an ethical and health-conscious vegan.

What's New

Let's Build It: AI Chatbot with RAG in .NET Using Your Data
course

Let's Build It: AI Chatbot with RAG in .NET Using Your Data

Build a Retrieval-Augmented Generation (RAG) chatbot that can answer questions using your data.

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Working with Large Language Models
tutorial

Working with Large Language Models

Learn how to work with Large Language Models (LLMs). Understand the fundamentals of how GPT works, the transformer architecture, and master prompt engineering techniques to build AI agents.

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From Zero to Hero: SignalR in .NET
course

From Zero to Hero: SignalR in .NET

Enable enterprise-grade real-time communication for your web apps with SignalR.

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Deep Dive: Solution Architecture
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Deep Dive: Solution Architecture

Master solution architecture and turn business needs into scalable, maintainable systems.

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Migrating: ASP.NET Web APIs to ASP.NET Core
course

Migrating: ASP.NET Web APIs to ASP.NET Core

A step-by-step process to migrate ASP.NET Web APIs from .NET Framework to ASP.NET Core.

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Getting Started: Caching in .NET
course

Getting Started: Caching in .NET

Let's make the hardest thing in programming easy for .NET software engineers.

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From Zero to Hero: Testing with xUnit in C#
course

From Zero to Hero: Testing with xUnit in C#

Learn how to test any codebase in .NET with the latest version of xUnit, the industry-standard testing library.

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Create a ChatGPT Console AI Chatbot in C#
blog

Create a ChatGPT Console AI Chatbot in C#

This walkthrough is your hands-on entry point to create a basic C# console application that talks to ChatGPT using the OpenAI API.

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