You will get Legacy .NET Application Migration
Top Rated
Top Rated
Project details
You will get a fully migrated .NET application — clean, buildable, and ready to deploy — without downtime or broken functionality.
I have migrated 20+ .NET Framework applications to .NET 6/7/8 for SaaS and enterprise clients, including EF6 to EF Core upgrades, ASP.NET MVC to Core rewrites, and full desktop-to-web transformations. Every migration starts with a free audit so you know exactly what is involved before work begins.
What sets this apart:
— Price confirmed after audit, not before — no surprises
— Phased delivery with Git commits at every milestone
— Handover document explaining every change made
— 100% Job Success Score across 13 completed projects
— Available for questions within 0–4 hours
Not sure if your app qualifies? Message me first — I will review your codebase and give you an honest estimate within a few hours, at no cost.
I have migrated 20+ .NET Framework applications to .NET 6/7/8 for SaaS and enterprise clients, including EF6 to EF Core upgrades, ASP.NET MVC to Core rewrites, and full desktop-to-web transformations. Every migration starts with a free audit so you know exactly what is involved before work begins.
What sets this apart:
— Price confirmed after audit, not before — no surprises
— Phased delivery with Git commits at every milestone
— Handover document explaining every change made
— 100% Job Success Score across 13 completed projects
— Available for questions within 0–4 hours
Not sure if your app qualifies? Message me first — I will review your codebase and give you an honest estimate within a few hours, at no cost.
Programming Languages
HTML & CSS, ASP.NET, C#What's included
| Service Tiers |
Starter
$400
|
Standard
$900
|
Advanced
$1,500
|
|---|---|---|---|
| Delivery Time | 7 days | 14 days | 30 days |
Number of Revisions | 2 | 5 | 9 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | |
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$100
CI/CD
(+ 2 Days)
+$200
Docker
(+ 2 Days)
+$150
Code Review
(+ 3 Days)
+$100Frequently asked questions
12 reviews
(12)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
DM
Dmitry M.
Dec 3, 2025
Databricks, Python, Grafana and automation developer need
Great job as always. Looking forward to the next.
DM
Dmitry M.
Nov 17, 2025
ASP.Net MVC Razor developer needed for several months
Danijel is a solid developer who doesn't have "no" in his vocabulary. He consistently tackled difficult problems without complaint and produced very good code. We will use him again.
GI
Gabriel I.
Nov 12, 2025
C# Developer Needed for Remote Debugging Support
LA
Legas A.
Nov 12, 2025
ASP.NET MVC developer needed for long term engagement
GC
Glen C.
Apr 15, 2024
2 page ASP.net core site
Great work and did as requested. Great communicator as well.
About Danijel
Senior .NET & Azure Engineer | Microservices REST APIs AI Integration
100%
Job Success
Sombor, Serbia - 1:13 am local time
Here's what I've delivered on Upwork:
✅ 13 projects completed with 100% Job Success Score
✅ REST APIs handling 1,000+ requests/day, saving one client 20 hours/week in manual work
✅ Migrated 20 legacy .NET Framework apps to .NET Core — zero downtime
✅ Built Python ETL pipelines on Databricks for enterprise analytics workflows
✅ Long-term engagements up to 1,100 hours with repeat clients
What I work with:
→ Backend: C#, ASP.NET Core, .NET 6/7/8/9/10, Web API, Entity Framework, Dapper
→ Architecture: Microservices, Clean Architecture, Domain-Driven Design, CQRS
→ Cloud: Azure (App Service, Functions, DevOps, OpenAI Service), CI/CD pipelines
→ Data: SQL Server, Python, PySpark, Databricks, ETL
→ Frontend (when needed): Angular, JavaScript, React
Steps for completing your project
After purchasing the project, send requirements so Danijel can start the project.
Delivery time starts when Danijel receives requirements from you.
Danijel works on your project following the steps below.
Revisions may occur after the delivery date.
Codebase review & audit
I scan all projects, NuGet packages and dependencies. You get a written report of breaking changes, risks, and a confirmed price before any migration work begins.
Core framework upgrade
I upgrade the project targets from .NET Framework to .NET 6/7/8, update all NuGet packages, and resolve build errors. The solution compiles clean on the new framework at the end of this step.