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$
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I will build a custom web app or saas backend with dot net
Lakshmanan P
About this gig
Need a reliable backend for your web application or SaaS product?
I will build a secure, scalable and production-ready backend using ASP.NET Core, C#, Web API, Entity Framework Core and SQL Server.
With 15+ years of software engineering experience, I have designed and developed real-world platforms, SaaS applications, marketplaces and business solutions.
What I can build:
ASP.NET Core Web APIs
Custom SaaS backends
Business web applications
REST API development
Database design & SQL Server
JWT authentication & role-based access
Payment gateway integration
Third-party API integration
Admin & management APIs
Subscription-based applications
Clean Architecture & scalable backend design
Azure deployment
My technology stack:
ASP.NET Core C# Web API Entity Framework Core SQL Server React Next.js Azure REST APIs JWT Git
Real production platforms I have built:
iCampusLink Education & internship marketplace
GetWash Car wash marketplace and service platform
Minimeo Kids learning platform
InformationNeeds Content and information portal
I focus on clean code, secure APIs, maintainable architecture and production-ready solutions.
Please contact me before placing an order
Get to know Lakshmanan P
Lakshmanan P
Senior Full Stack Developer and AI SaaS Engineer
- FromIndia
- Member sinceMar 2020
- Avg. response time1 hour
- Last delivery2 years
Languages
Tamil, English
Senior Full Stack Developer with 15+ years of experience building production-ready web applications, SaaS platforms, APIs and AI solutions. I specialize in ASP.NET Core, C#, Web API, React, Next.js, React Native, SQL Server, Azure, OpenAI and Claude AI. I have built real-world platforms including iCampusLink, GetWash, Minimeo and InformationNeeds, covering marketplaces, payments, authentication, dashboards and automation. I help businesses build, modernize and scale web applications, APIs, SaaS products and AI-powered solutions.
My Portfolio
FAQ
What information do you need to start the project?
I need your project requirements, API or feature list, preferred technology (if any), database requirements, design/reference, and access to required third-party services. If you are not sure about the architecture, I can help you define the technical approach before development.
Can you work with my existing codebase or database?
Yes. Send me repository access or a schema and I'll review it before we agree scope. Adding features to an existing .NET application is common work for me.
Can you integrate my existing frontend with the API?
Yes. I can integrate ASP.NET Core APIs with React, Next.js, Angular, mobile applications, or other frontend technologies.
Can you build a complete SaaS application?
Yes. I can develop SaaS applications including backend APIs, database, authentication, subscriptions, payments, admin functionality and integrations. Large projects can be discussed and provided through a custom offer based on the complete requirements.
Do you do the frontend as well?
Yes — Angular or React, or plain HTML if you prefer. Tell me if you already have a designer and I'll build to their design.
Can you integrate payment gateways or third-party APIs?
Yes. I can integrate payment gateways, authentication services, CRM systems, external REST APIs, webhooks and other third-party services depending on your requirements.
What if the project needs more work than the package covers?
I'll tell you before you order, not after. Message me with your requirements and I'll send a custom offer with exact scope and price.
Can you deploy the application to Azure?
Yes. I can deploy ASP.NET Core applications and APIs to Azure App Service and configure the required database, application settings and deployment environment.
