You will get a legacy ASP.NET app migrated to .NET 8, 9, or 10
Project details
I migrate legacy ASP.NET / .NET Framework applications to modern .NET, architected properly, not just recompiled. 13+ years building production .NET systems, including my own commercial software line.
Single App/Module covers migrating one small application or module, with dependency updates and a regression testing checklist so nothing breaks silently. Full Application covers your entire ASP.NET app, migrated and tested end-to-end. Multi-App/Enterprise is a starting price for larger systems; I'll scope the full migration on a call before quoting a final number.
Every migration includes 14 days of post-delivery support for issues that surface after go-live.
This covers the framework migration itself: dependency updates, compatibility fixes, and testing. It does not include a full architecture redesign beyond what the migration requires, or new feature development, both available separately or as add-ons.
Single App/Module covers migrating one small application or module, with dependency updates and a regression testing checklist so nothing breaks silently. Full Application covers your entire ASP.NET app, migrated and tested end-to-end. Multi-App/Enterprise is a starting price for larger systems; I'll scope the full migration on a call before quoting a final number.
Every migration includes 14 days of post-delivery support for issues that surface after go-live.
This covers the framework migration itself: dependency updates, compatibility fixes, and testing. It does not include a full architecture redesign beyond what the migration requires, or new feature development, both available separately or as add-ons.
Programming Languages
ASP.NET, C#Coding Expertise
Performance OptimizationWhat's included
| Service Tiers |
Starter
$900
|
Standard
$1,800
|
Advanced
$3,500
|
|---|---|---|---|
| Delivery Time | 10 days | 15 days | 25 days |
Number of Revisions | 1 | 2 | 2 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Clean Architecture Refactor Bundle
(+ 5 Days)
+$700
Docker/VPS Deployment Bundle
(+ 2 Days)
+$300
Ongoing Care Plan (First Month)
+$350Frequently asked questions
About Sahidul
Senior .NET Core Developer | ASP.NET Core, SaaS & ERP | AI Integration
Dhaka, Bangladesh - 11:35 am local time
Over the past decade I've led technical teams and delivered systems for MetLife, Telenor Health, ShareTrip, and Monstar Lab, working across core banking, digital healthcare, and online travel platforms. Alongside that, I independently design, build, and ship complete business software under my own brand, Zero Byte BD - 25+ production ASP.NET Core applications (ERP, POS, hospital & school management, inventory, invoicing) and a Windows utility app, Net Speed Meter, used by over 1 million people. I've also written five published technical books on C#, ASP.NET Core, and SignalR.
What I can do for you:
- Design and build ASP.NET Core / .NET web apps, REST APIs, and admin dashboards from scratch, or take over and stabilize an existing codebase.
- Build multi-tenant SaaS products, ERP/POS systems, and business management platforms with Entity Framework Core, SQL Server/MySQL, and clean, documented architecture.
- Integrate AI (OpenAI/Claude/Azure AI) into existing .NET applications.
- Add real-time features (SignalR), secure authentication/authorization, and third-party API integrations.
- Lead delivery end-to-end - requirements, architecture, sprint planning, and hands-on coding - as a Certified Scrum Master (CSM(R)) and Scrum Product Owner (CSPO(R)).
I write clean, maintainable code, document what I build, and communicate clearly in English throughout the project. Browse my Project Catalog below for fixed-price ASP.NET Core services - from a quick bug fix to a full ERP build - or message me about a custom project. I'm happy to start with a short paid trial task if that helps you evaluate fit.
Steps for completing your project
After purchasing the project, send requirements so Sahidul can start the project.
Delivery time starts when Sahidul receives requirements from you.
Sahidul works on your project following the steps below.
Revisions may occur after the delivery date.
Audit codebase & dependencies
Review the current app, dependencies, and third-party integrations to plan the migration.
Migrate & fix compatibility issues
Migrate the code to modern .NET, updating dependencies and resolving breaking changes.