You will get A powerful ASP.NET Core Web API backend with a modern React frontend.
Project details
You will get a clean, scalable, and secure ASP.NET Core Web API tailored specifically for your business or startup needs. Whether you’re building your first MVP or expanding an existing system, I’ll deliver a professional backend that’s ready for real-world use.
With experience in both freelance and enterprise-level development, I focus on writing maintainable code, using best practices in architecture, security (JWT), and database design (Microsoft SQL Server). I also provide full React frontend integration if needed, so your application is fully functional from day one.
The work I deliver is efficient, production-ready, and easy to scale as your business grows. This service is perfect for those who want reliable backend development without wasting time or money.
With experience in both freelance and enterprise-level development, I focus on writing maintainable code, using best practices in architecture, security (JWT), and database design (Microsoft SQL Server). I also provide full React frontend integration if needed, so your application is fully functional from day one.
The work I deliver is efficient, production-ready, and easy to scale as your business grows. This service is perfect for those who want reliable backend development without wasting time or money.
Programming Languages
HTML & CSS, ASP.NET, C#Coding Expertise
PSD to HTML, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$249
|
Standard
$549
|
Advanced
$949
|
|---|---|---|---|
| Delivery Time | 7 days | 15 days | 30 days |
Number of Revisions | 2 | 4 | 5 |
Number of Pages | 3 | 6 | |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$50
Admin Panel / Dashboard
(+ 2 Days)
+$100
Docker Containerization
(+ 3 Days)
+$75
CI/CD Pipeline (GitHub Actions)
(+ 2 Days)
+$120Frequently asked questions
About Kacper
Backend Developer, Start-up owner
Lodz, Poland - 2:33 pm local time
After recently selling my startup, I’m diving back again into my true passion: crafting robust, full-stack applications.
I specialize in backend magic with ASP.NET Core, C#, and SQL Server, but I also bring React skills to the table — giving you seamless project delivery from database to browser. Whether it's building APIs, designing data models, or creating intuitive UIs, I turn complex challenges into scalable, elegant systems.
Now available for freelance projects!
My Expertise
Backend & .NET Development
* ASP.NET Core, C#, Minimal APIs, Asynchronous Programming
* Microsoft SQL Server (Stored Procedures, Jobs, Performance Tuning)
* Containerization: Docker, Kubernetes (Certified Practitioner)
Full-Stack Development
* End-to-end solutions with .NET and React
* RESTful APIs, SQL, and cloud-ready architectures
* Clean frontend interfaces with React and TypeScript
Bonus Skills
* Teaching coding (SQL, Python, Lua) — clear communicator, great with stakeholders
* Translating complex tech into plain English — ideal for cross-functional teams
Why Work With Me?
Proven Scale
Built enterprise-grade backend systems at Rossmann, handling real-world, high-load environments.
Startup Experience
Fresh off a successful exit — I know how to balance business goals with technical execution.
Versatility
From legacy .NET rescue missions to fresh greenfield builds, I adapt fast.
Mentor Mindset
Over 2 years teaching coding — I make tech understandable for teams, clients, and users alike.
Let’s Build Your Next Project
Need a full-stack .NET and React developer who can deliver high-quality results — fast?
Reach out at: kacperormaniec@gmail.com
Steps for completing your project
After purchasing the project, send requirements so Kacper can start the project.
Delivery time starts when Kacper receives requirements from you.
Kacper works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements Analysis
Review your needs and clarify goals to ensure we’re building the right solution.
Database and Backend Setup
Set up ASP.NET Core Web API, configure database (MSSQL/PostgreSQL), and structure the project.