You will get a scalable ASP.NET Core Web API and backend
Project details
Need a reliable, scalable backend for your web application or SaaS product? I will build a professional ASP.NET Core Web API tailored to your requirements, with clean architecture, database integration, validation, error handling, and Swagger/OpenAPI documentation where applicable.
With 12+ years of .NET development experience, I can help with both new API development and improvements to existing applications. I work with C#, ASP.NET Core, Entity Framework Core, Dapper, SQL Server, PostgreSQL, and REST APIs.
Depending on your selected package, I can deliver API endpoints, database integration, authentication/authorization, third-party API integrations, and production-ready backend functionality.
My focus is not just making an API work — I build solutions that are maintainable, secure, performant, and ready to evolve as your application grows.
This project is suitable for SaaS applications, web applications, mobile app backends, business systems, dashboards, and API integrations.
With 12+ years of .NET development experience, I can help with both new API development and improvements to existing applications. I work with C#, ASP.NET Core, Entity Framework Core, Dapper, SQL Server, PostgreSQL, and REST APIs.
Depending on your selected package, I can deliver API endpoints, database integration, authentication/authorization, third-party API integrations, and production-ready backend functionality.
My focus is not just making an API work — I build solutions that are maintainable, secure, performant, and ready to evolve as your application grows.
This project is suitable for SaaS applications, web applications, mobile app backends, business systems, dashboards, and API integrations.
Programming Languages
HTML & CSS, ASP.NET, C#Coding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$99
|
Standard
$299
|
Advanced
$549
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Optional add-ons
You can add these on the next page.
Additional 3 API endpoints
(+ 1 Day)
+$75About Rahul
Senior Full-Stack .NET Developer | SaaS | APIs | Chrome Extensions
Lucknow, India - 8:40 pm local time
I help startups and businesses turn ideas into production-ready software — from MVP architecture and development to third-party integrations, performance optimization, security, and ongoing improvements.
What I can help you build
SaaS & Web Applications — architecture, development, APIs, authentication, subscriptions, dashboards, and business workflows
.NET Backend Systems — C#, ASP.NET Core, Web API, Entity Framework Core, Dapper, SQL Server, PostgreSQL, MySQL
Full-Stack Applications — Blazor, JavaScript, jQuery, HTML/CSS and API-first architectures
Chrome Extensions — Manifest V3, content scripts, background services, API integrations, subscriptions, Stripe payments, and web-portal automation
AI-Powered Applications — OpenAI/API integrations, AI-assisted workflows, intelligent automation, and AI features within existing applications
Third-Party Integrations — Stripe, Google APIs, Gmail, email services, security APIs, payment systems, and other external APIs
Desktop Applications — WPF, WinForms, Windows automation, utilities, and business applications
Database & Performance Optimization — query optimization, database design, API performance, scalability, and troubleshooting
Existing Application Modernization — fixing legacy systems, improving architecture, adding new functionality, and migrating to modern .NET
My technical expertise
Backend: C#, .NET, ASP.NET Core, Web API, Entity Framework Core, Dapper, LINQ
Frontend: Blazor, JavaScript, jQuery, HTML, CSS
Databases: SQL Server, PostgreSQL, MySQL
Desktop: WPF, WinForms
Extensions: Chrome Extensions, Manifest V3
Cloud & Integrations: Azure, REST APIs, Stripe, Google APIs, Gmail and third-party services
Architecture: Clean Architecture, SOLID, RESTful APIs, authentication/authorization, scalable SaaS architecture
I approach projects from both an engineering and product perspective. I care about clean architecture and maintainability, but also about usability, performance, security, scalability, and how the software will work in a real business environment.
Whether you need to build a new SaaS product, develop an MVP, extend an existing .NET application, create a Chrome Extension, integrate AI or payments, or troubleshoot a difficult backend problem, I can take ownership from development through delivery.
If you have a product idea or an existing application that needs a senior .NET engineer, let's discuss it.
Steps for completing your project
After purchasing the project, send requirements so Rahul can start the project.
Delivery time starts when Rahul receives requirements from you.
Rahul works on your project following the steps below.
Revisions may occur after the delivery date.
Review requirements and project scope
I'll review your requirements, API functionality, database needs, and technical materials to confirm the implementation scope.
Design the API architecture
I'll define the API structure, data models, business logic, authentication requirements, and database integration approach.