You will get MVP & SaaS App | .NET Developer | Full Stack Developer
Top Rated
Project details
You have a product idea — and you need it built properly, not just quickly.
I'm a .NET Developer and Full Stack Developer specialising in MVP and SaaS development: React + .NET Core, clean architecture, scalable API design, and UI that holds up in production.
Most developers will build what you ask for. I'll tell you what you actually need — then build that.
What I deliver:
Discovery & scope: define MVP boundaries, user flows, and tech stack before writing code
Architecture first: data model, API structure, auth strategy — designed to scale
Full stack build: React/Next.js frontend + .NET Core backend + REST API + database
Auth, roles, and access control built in from the start
Third-party integrations: Stripe, SendGrid, AWS, or your stack
Staging delivery + handoff docs so your team can take it forward
Done = your MVP runs in staging, all core flows work, and you have a clear handoff doc.
Past results: EdTech LMS for 10,000+ users (Stripe + SendGrid); AI financial monitoring platform (–45% manual checks); digital lending platform (+35% completed applications).
I'm a .NET Developer and Full Stack Developer specialising in MVP and SaaS development: React + .NET Core, clean architecture, scalable API design, and UI that holds up in production.
Most developers will build what you ask for. I'll tell you what you actually need — then build that.
What I deliver:
Discovery & scope: define MVP boundaries, user flows, and tech stack before writing code
Architecture first: data model, API structure, auth strategy — designed to scale
Full stack build: React/Next.js frontend + .NET Core backend + REST API + database
Auth, roles, and access control built in from the start
Third-party integrations: Stripe, SendGrid, AWS, or your stack
Staging delivery + handoff docs so your team can take it forward
Done = your MVP runs in staging, all core flows work, and you have a clear handoff doc.
Past results: EdTech LMS for 10,000+ users (Stripe + SendGrid); AI financial monitoring platform (–45% manual checks); digital lending platform (+35% completed applications).
Programming Languages
Python, ASP.NET, JavaCoding Expertise
Localization, Performance Optimization, SecurityWhat's included $149
These options are included with the project scope.
$149
- Delivery Time 3 days
- Number of Revisions 0
Optional add-ons
You can add these on the next page.
Fast 1 Day Delivery
+$50Frequently asked questions
12 reviews
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OS
Oleksandr S.
May 22, 2026
Full Stack Developer & .NET Developer help with API Integration issues
Really impressed with Daria's expertise. She spotted the root cause of our API issues within the first 30 minutes and explained everything clearly. Highly recommend for any .NET or Full Stack Developer consultation
OK
Olha K.
Feb 11, 2026
Full Stack .NET Developer Needed to Help With Payment Integration
Daria did a great job helping us fix our Stripe integration in a .NET app. She quickly found why webhooks weren’t updating the order status and guided us through a clean solution. Clear communication, fast turnaround, and very easy to work with. Would definitely hire again.
BL
Bartosz L.
Jun 2, 2023
.NET Developer needed to develop Blazor application (PART TIME)
Daria is great for her excellent work, communication, availability, and technical skills in .NET. Her coding proficiency, clear communication, prompt availability, and strong technical abilities have been instrumental in the success of your project. She is a valuable asset to your team.
SW
Stuart W.
Apr 3, 2021
.Net Full stack developer
Dari was easy to communicate with and an excellent and talented developer
SM
Stuart M.
Jul 6, 2020
Seeking Experienced Vue.js & Typescript Developer for Ongoing, Remote, Team-based work.
I have no hesitation in recommending Daria and her team.
Honest, hard working, skilful, communicative and keen.
The work done for me was exactly as I requested and they were able to solve problems along the way. It was a big bit of work (6+ months) and they fitted into my team well.
I would definitely use Daria again.
Honest, hard working, skilful, communicative and keen.
The work done for me was exactly as I requested and they were able to solve problems along the way. It was a big bit of work (6+ months) and they fitted into my team well.
I would definitely use Daria again.
About Daria
.NET Developer | Full Stack Developer | C# Development | Angular Blazo
100%
Job Success
Zaporozhye, Ukraine - 6:35 am local time
As a Full Stack Developer, .NET Full Stack Developer, and experienced Web Developer, I help companies build scalable SaaS platforms, CRM systems, and enterprise-grade solutions. Over the past 10+ years, I’ve worked as a React Developer, WordPress Developer, and Mobile App Developer, delivering production-ready systems across fintech, e-commerce, healthcare, and AI-driven platforms.
During my career as a Full Stack Developer and .NET Developer, I’ve built and scaled 10+ complex web platforms. I’ve also worked as a Python Full Stack Developer on data-heavy projects and as a Full Stack Developer AI, integrating AI services into enterprise systems.
🔴 I’ve built Norwegian E-learning web application and online training software - a place where businesses, employees, and organizations of all sizes can come together to learn, grow, and succeed. As a Tech Lead, Full Stack Developer and .NET Developer I leveraged microservices architecture with Vue.js, ASP.NET, SQL, Azure App, and multiple APIs. The Vignita platform reached 2,500 companies and 100,000+ upskilled employees nationwide, introducing e-learning solutions in 10+ local university programs.
🟠 Affiliate B2B platform “Affaim” – built as a .NET Full Stack Developer and Python Full Stack Developer, integrating APIs, handling high-load databases, and delivering secure partner portals. My role as a Web Developer and Full Stack Developer Shopify included complex integrations and multi-tenant structures.
🟡 Global financial service “WorldRemit” – worked as a .NET Developer, .NET Full Stack Developer, and Full Stack Developer AI, migrating legacy systems to modern microservices and integrating global payment APIs.
🟢 AI-powered arbitrage platform “Sellerbility” – delivered as a Full Stack Developer AI, building automation logic and AI integrations. As a Full Stack Developer and React Developer, I implemented analytics dashboards and API-driven modules.
🔵 Multi-platform Telemedicine system – developed as a Mobile App Developer, Full Stack Developer, and Web Developer, using .NET Core, Xamarin, Vue.js, and secure API integrations. My experience as a Mobile App Developer includes cross-platform apps and enterprise-grade mobile systems.
As a professional Full Stack Developer, I prefer long-term cooperation and full-time engagement. However, I am also open to handling ad-hoc tasks or specific roles such as .NET Developer, Backend .NET Developer, Angular Developer, or Senior Web Developer. I also build .NET MAUI cross-platform apps that share a single C# codebase for iOS, Android, and desktop. In addition, I’ve worked as a WordPress Developer on custom business platforms and as a Full Stack Developer Shopify, building scalable e-commerce integrations. I also act as a Full Stack Developer React, focusing on dynamic dashboards and frontend performance optimization.
As a Full Stack Developer, I have used a wide range of technologies to design, build, and scale complex software systems for both startups and enterprises.
As a Full Stack Developer, I’ve worked with C#, .NET, .NET Core, ASP.NET, ASP.NET MVC, ASP.NET Web API, ASP.NET Web Forms, LINQ, Entity Framework, .NET Framework, WPF, WCF, OAuth, Auth0, Elasticsearch, and numerous API integrations including AI-driven services.
For frontend development, I’ve used Angular, jQuery, TypeScript, Vue.js, React.js, and Blazor to build interactive, responsive user interfaces fully integrated with .NET-based architectures.
Throughout my 10+ years in development, I’ve also worked with major databases like MsSQL (EF), MySQL, PostgreSQL, MongoDB, Redis, and Azure SQL Database, as well as cloud platforms such as Microsoft Azure, Azure Containers, Azure App Services, and Azure Data Factory.
In addition, I have strong experience in AI and automation, working with OpenAI API and Dify AI to create smart, data-driven software solutions.
As a Full Stack Developer, I also specialize in API development and integration: ChatGPT API, Stripe API, RevenueCat API, Crypto Payments API, Crypto Exchange API, PayPal API, Zendesk, Dify, IronPDF, Google Maps, SendGrid (both REST and RPC), RESTful, GraphQL, and gRPC.
I’ve also worked with mobile technologies such as Flutter, Dart, FlutterFlow, Supabase, Firebase Auth, Android, iOS, and general mobile app development.
My core expertise remains as a Full Stack Developer and .NET Developer, designing clean architectures (MVC, Microservices, Event-Driven), integrating AI tools as a Full Stack Developer AI, and delivering reliable cross-platform systems as a Mobile App Developer.
If you're searching for a Web Developer, React Developer, WordPress Developer, Python Full Stack Developer, Full Stack Developer Shopify, or .NET Full Stack Developer, I’m ready to collaborate
Steps for completing your project
After purchasing the project, send requirements so Daria can start the project.
Delivery time starts when Daria receives requirements from you.
Daria works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & scope alignment
I review your idea, ask clarifying questions, and define the MVP scope: what's in, what's out, and what to build first.