You will get a legacy .NET code audit with a modernization roadmap & cost estimate
Project details
Get a clear, written roadmap for modernizing your legacy .NET/ASP.NET application — what to fix first, what it will cost, and what could go wrong. Delivered by a senior .NET architect with 13+ years shipping production systems in banking, healthcare, and travel-tech.
Many legacy ASP.NET / .NET Framework applications still run fine day-to-day but are quietly accumulating risk: outdated dependencies, hard-to-maintain code, and rising hosting costs. Before committing budget to a full rewrite or migration, this audit gives you a concrete, written picture of what you're actually dealing with.
You'll receive a full review of your codebase and dependency/framework versions, a prioritized modernization roadmap document ranking what to fix first and why, and a ballpark cost and timeline estimate for the full migration path. Higher tiers add a security-focused review, a live walkthrough call to discuss findings, and a phased cost/time plan you can take directly to stakeholders.
This audit does not include the migration work itself — that's a separate, scoped engagement once you know exactly what you're taking on.
Many legacy ASP.NET / .NET Framework applications still run fine day-to-day but are quietly accumulating risk: outdated dependencies, hard-to-maintain code, and rising hosting costs. Before committing budget to a full rewrite or migration, this audit gives you a concrete, written picture of what you're actually dealing with.
You'll receive a full review of your codebase and dependency/framework versions, a prioritized modernization roadmap document ranking what to fix first and why, and a ballpark cost and timeline estimate for the full migration path. Higher tiers add a security-focused review, a live walkthrough call to discuss findings, and a phased cost/time plan you can take directly to stakeholders.
This audit does not include the migration work itself — that's a separate, scoped engagement once you know exactly what you're taking on.
Programming Languages
ASP.NET, C#Coding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$350
|
Standard
$550
|
Advanced
$900
|
|---|---|---|---|
| Delivery Time | 5 days | 5 days | 8 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.
Live 30-Minute Walkthrough Call
+$75
Security-Focused Deep Dive
+$150Frequently asked questions
About Sahidul
Senior .NET Core Developer | ASP.NET Core, SaaS & ERP | AI Integration
Dhaka, Bangladesh - 1:27 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.
Codebase & dependency review
I review your repository, framework/dependency versions, and overall architecture to identify risks and outdated components.
Prioritized modernization roadmap
I write a document ranking what to fix first and why, based on risk and impact to your business.