Who is Ehsan Tatasadi?

Ehsan Tatasadi is a freelance Senior .NET & Azure Engineer based in Hamburg, Germany, with 8+ years on the Microsoft stack and more than 7 years in the German energy sector (a DAX-listed energy utility and a regional grid operator). He builds and modernizes .NET platforms on Azure, connects them with Dynamics 365, and runs them in production.

What technologies does Ehsan Tatasadi specialize in?

C#, .NET 8 and ASP.NET Core with SQL Server; Azure (App Service, Functions, Key Vault, Private Endpoints, Application Insights); Dynamics 365 CE integration via the XRM SDK, C# plugins and JavaScript form scripts; Terraform and Azure DevOps YAML pipelines; React and TypeScript. He is certified in AZ-400, AZ-204, AI-103 and GH-300.

Where is Ehsan Tatasadi located?

Ehsan Tatasadi is based in Hamburg, Germany. He works remotely, on-site in Hamburg, and on-site anywhere in Germany on demand.

Is Ehsan Tatasadi available for freelance projects?

Yes, he is available immediately, full-time, for freelance projects in .NET development and modernization, Azure migration, Dynamics 365 integration, and Azure DevOps & Terraform — especially in the energy sector and other regulated industries.

Available now for new projects

Modern .NET platforms, on Azure, built for energy.

I’m Ehsan Tatasadi, Senior .NET & Azure Engineer in Hamburg. I build and modernize .NET platforms on Azure for energy companies, connect them with Dynamics 365, and run them in production.

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CertifiedAZ-400AZ-204AI-103GH-300MB-200

Ehsan Tatasadi

Senior .NET & Azure Engineer · Hamburg

DE · EN

Page response

up to 75%

faster at a DAX-listed utility, by batching CRM calls

CRM calls per request

34 → 11

on one portal page, after batching

Infrastructure as code

Every portal resource in Terraform. Every pipeline in YAML.

App Service, Key Vault, Private Endpoints, Application Insights.

resource "azurerm_private_endpoint" "portal" {
  name      = "pe-portal-prod"
  subnet_id = azurerm_subnet.private.id

  private_service_connection {
    name                 = "psc-portal"
    is_manual_connection = false
  }
}

Energy sector

7+ years, two long engagements

Regional grid operator

2019–2022 · Acando / CGI

DAX-listed energy utility

2022–2026 · Freelance

His deep expertise in the Azure platform, DevOps, and platform engineering consistently kept us on the right track and elevated the entire team.

Ingo Zimny · Geschäftsführer, Pentawork Solutions

01What I do

From first commit to production

.NET Development & Modernization

ASP.NET Core backends and REST APIs. Upgrades like .NET 5 → .NET 8, breaking changes resolved, performance tuned.

C# · .NET 8 · ASP.NET Core · EF Core

Azure Migration, DevOps & Terraform

IIS to Azure App Service with Private Endpoints and Key Vault. Terraform and YAML pipelines instead of manual deployments.

App Service · Terraform · Azure DevOps

Dynamics 365 Integration

Dynamics 365 CE wired into portals via the XRM SDK, C# plugins and form scripts. Onboarding, PV registration, grid connection.

D365 CE · XRM SDK · C# plugins

Azure AI Integration

Azure OpenAI and Microsoft Foundry agents with RAG over Azure AI Search. AI-103 certified, shown in reference projects.

Reference projects · public source

View services

02Selected work

The stack I build and run

All Projects →

energy · freelance · 2022–2026

DAX-listed energy utility

ASP.NET Core backends for customer portals, the move from IIS to Azure App Service, .NET 5 → .NET 8, Terraform, Azure DevOps and Dynamics 365 integration. Then running it in production.

Private EndpointsKey VaultApplication InsightsAzure DevOps YAML

Read the case study

Two long client engagements in the German energy sector (4 and 3.5 years), plus personal reference projects with public source code that show how I design and automate Azure solutions.

Drawing: an application moves from IIS to a layer stack of React, .NET 8, Azure App Service and Dynamics 365, with Terraform and Azure DevOps

Senior .NET & Azure Engineer – DAX-listed Energy Utility

Drawing: B2C and B2B self-service portals for PV registration and grid connection, connected to ASP.NET MVC and Dynamics 365

Lead Consultant (Fullstack .NET & Dynamics 365) – Regional Grid Operator

Drawing: a chat client talks to a Microsoft Foundry agent that uses Azure AI Search and Dynamics 365 data, with Entra ID and Terraform

D365 CRM Intelligence – AI Assistant for Dynamics 365

Drawing: client applications reach Azure OpenAI through Azure API Management, with Managed Identity and Terraform

Azure AI Integration Gateway Platform

Screenshot of the order processing app next to its flow: Next.js, Azure Functions, Service Bus

Event-Driven Order Processing System

Screenshot of the invoice upload and extracted details next to its flow: Azure Functions, Azure AI Services, Cosmos DB

Smart Invoice Automation

03Skills

The tools behind the work

The core of my client work: .NET / C# backends with SQL Server, Azure, Dynamics 365 CE integration, Azure DevOps and Terraform, and running systems in production. Azure AI is covered by the AI-103 certification and personal reference projects.

Backend Development

.NET / C#

ASP.NET Core

REST APIs

.NET Upgrades & Modernization

ASP.NET MVC

Entity Framework Core

Microservices

Integration Development

Azure

Microsoft Azure

Azure App Service

On-Premises to Azure Migration

Azure Functions

Azure API Management

Azure Service Bus

Azure Event Grid

Azure Storage

Azure Key Vault

Private Endpoints

Entra ID

Managed Identity

DevOps & Infrastructure as Code

Azure DevOps (YAML Pipelines)

Terraform

CI/CD

Infrastructure as Code

GitHub Actions

Bicep

Docker

PowerShell

Git

Multi-Environment Release Management

Dynamics 365 / Power Platform

Dynamics 365 CE (CRM)

XRM SDK / Organization Service

Early-bound Entities

C# Plugins

JavaScript Form Scripts

Customizing (Entities, Forms, Business Rules, Security Roles)

Solution Management & Deployment

Power Automate

Power Pages

Data

SQL Server

Azure SQL

PostgreSQL

Cosmos DB

Data Modeling

Performance Tuning

Monitoring & Operations

Application Insights

Azure Monitor

Log Analytics

Azure Workbooks

Incident Management

Root Cause Analysis

Performance Optimization

Frontend

React

TypeScript

JavaScript

HTML5

CSS / SCSS / Tailwind

Next.js (personal projects)

Azure AI

Azure OpenAI

Microsoft Foundry

Microsoft Agent Framework

Azure AI Search

Retrieval-Augmented Generation (RAG)

AI Document Intelligence

Ways of Working

Scrum / Kanban

Code Reviews

Unit & Integration Testing

Technical Documentation

GitHub Copilot

Claude Code

AI-Assisted Development

04Testimonials

In their own words

What colleagues, managers, and clients say about working with me — taken from my LinkedIn recommendations, shown in their original language.

I had the pleasure of working alongside Ehsan (in my role as Product Owner) for several years on the same project. His deep expertise in the Azure platform, DevOps, and platform engineering consistently kept us on the right track and elevated the entire team. Just as impressive, Ehsan is always proactive and generous with his time, uplifting everyone around him with his can-do attitude and unwavering willingness to help.

Ingo Zimny

Geschäftsführer bei Pentawork Solutions

Managed Ehsan directly

Ehsan hat gemeinsam mit mir bei CGI gearbeitet. Ich habe ihn als sehr strukturierten und zuverlässigen Mitarbeiter geschätzt. Sein Know-How im Bereich Azure, Frontend-Entwicklung sowie DevOps machten ihn zu einem gefragten Experten. Die Zusammenarbeit war sehr gut und professionell. Ich würde jederzeit gerne wieder mit ihm zusammen arbeiten.

Torben Häder

Driving digital transformation

Managed Ehsan directly

I worked with Ehsan for 5–6 years on the same project for a major customer. He was one of the best colleagues I've had the pleasure of working with. Ehsan had complete command of his technical areas, including .NET, Azure Cloud, and Azure DevOps, and was one of our lead experts. One of the key initiatives where he played a major role was our transition from classic Azure DevOps pipelines to YAML pipelines, which he helped drive successfully. He is a true senior professional who consistently delivers high-quality work, takes ownership of his responsibilities, and is always willing to support his colleagues. He is also an excellent code reviewer—not afraid to provide constructive feedback, but always in a respectful and collaborative manner that helps the whole team improve. Beyond his technical expertise, Ehsan was one of the easiest colleagues to approach. He was always open to discussing ideas, sharing knowledge, and exchanging opinions in a friendly and professional way. I would gladly work with him again.

Nikica Cvitkusic

Dynamics 365 CRM/CE Consultant and Developer