You will get SaaS Consultation | .NET Developer | Full Stack Developer
Top Rated
Project details
You have a SaaS idea — but not sure which tech stack to choose, how to structure the backend, or where to start.
I am a .NET Developer and Full Stack Developer who has built SaaS products across FinTech, HealthTech, EdTech, and B2B — from greenfield architecture to multi-tenant platforms on .NET Core, C#, and ASP.NET.
In this consultation we cover:
Stack decision: .NET Core vs Node.js, SQL Server vs PostgreSQL vs MongoDB — which fits your SaaS and why.
Architecture: monolith vs microservices, API design, database schema, and multi-tenancy — planned from day one.
Auth and access: OAuth2, JWT, role-based access control, and user management for a growing SaaS platform.
Integrations: Stripe, SendGrid, AWS, and third-party APIs — connected without coupling your core system.
Delivery plan: phased roadmap so you ship an MVP fast and extend without rebuilding.
Done = clear SaaS architecture, stack decision, and written action plan within 24 hours.
.NET Developer · Full Stack Developer · C# Developer · Node.js · MySQL · Web Application.
What does your SaaS need to do?
I am a .NET Developer and Full Stack Developer who has built SaaS products across FinTech, HealthTech, EdTech, and B2B — from greenfield architecture to multi-tenant platforms on .NET Core, C#, and ASP.NET.
In this consultation we cover:
Stack decision: .NET Core vs Node.js, SQL Server vs PostgreSQL vs MongoDB — which fits your SaaS and why.
Architecture: monolith vs microservices, API design, database schema, and multi-tenancy — planned from day one.
Auth and access: OAuth2, JWT, role-based access control, and user management for a growing SaaS platform.
Integrations: Stripe, SendGrid, AWS, and third-party APIs — connected without coupling your core system.
Delivery plan: phased roadmap so you ship an MVP fast and extend without rebuilding.
Done = clear SaaS architecture, stack decision, and written action plan within 24 hours.
.NET Developer · Full Stack Developer · C# Developer · Node.js · MySQL · Web Application.
What does your SaaS need to do?
Programming Languages
Python, ASP.NET, C#Coding Expertise
Cross Browser & Device Compatibility, PSD to HTML, LocalizationWhat's included
| Service Tiers |
Starter
$49
|
Standard
$149
|
Advanced
$224
|
|---|---|---|---|
| Delivery Time | 1 day | 2 days | 3 days |
Number of Revisions | 0 | 0 | 0 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
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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
Full Stack Developer | .NET Developer | C# Developer Angular Blazor
100%
Job Success
Zaporozhye, Ukraine - 11:59 am local time
8+ years as a Full Stack Developer and .NET Developer, 60+ web apps shipped for US, UK and EU clients $60k+ earned on Upwork as a C# Developer and .NET Developer, 100% Job Success Score
As a Full Stack Developer, I've shipped 40+ releases combining React, Angular and ASP.NET Core
As a C# Developer, I cut API response times by 45% and infrastructure costs by 30% for a fintech client As a .NET Developer, I migrated 3 legacy monoliths to .NET Core microservices, +70% deployment speed
💥 Recent win — as a Full Stack Developer and C# Developer, I rebuilt a logistics platform using .NET Core, Angular and MySQL, cutting order processing time by 55% and lifting client retention by 22%.
🟢 Most business platforms are slow, hard to scale and expensive to maintain. With 8+ years as a .NET Developer, C# Developer and Full Stack Developer, I architect scalable web developer solutions on .NET, Angular, React and Python stacks that turn technical debt into growth 🟢
⭐️⭐️⭐️⭐️⭐️ "She's an outstanding .NET Developer and Full Stack Developer. Reliable, communicative, and delivers clean, production-ready C# code every time."
🎯 WHY CLIENTS CHOOSE ME AS A FULL STACK DEVELOPER
I'm a Full Stack Developer, .NET Developer and C# Developer with full-cycle ownership — from database architecture and API design to pixel-perfect frontends. As a C# Developer, I write clean, testable code following SOLID principles, and as a Full Stack Developer I make sure the entire product actually works for your users.
✔️ .NET Core & C# — as a .NET Developer and C# Developer: scalable ASP.NET Core APIs, background services, .NET MAUI apps
✔️ Frontend — React, Angular, Vue.js, jQuery, built for speed and clean UX
✔️ Full Stack Development — as a Full Stack Developer, connecting .NET, Node.js and Python backends to JavaScript frontends
✔️ Web Developer Services — as a web developer, WordPress, Laravel and PHP sites alongside custom .NET apps
✔️ Database Architecture — MySQL, SQL Server, API Integration for data-heavy systems
✔️ Cloud & DevOps — Azure, AWS, Docker, CI/CD, supporting .net full stack developer and full stack developer react deployments
📊 RESULTS
🔶 Fintech Platform: as a .NET Developer and C# Developer, -60% transaction errors, 99.9% uptime via a full .NET Core rebuild
🔶 E-commerce Marketplace: as a Full Stack Developer, React + .NET Core APIs, +28% checkout conversion, 3x page load speed
🔶 Healthcare SaaS: as a senior .net developer, HIPAA-compliant rebuild, -40% manual admin work
⚙️ TECH STACK
C#, .NET, .NET Core, .NET Framework, .NET MAUI, ASP.NET, React, Angular, Vue.js, Node.js, JavaScript, TypeScript, Python, PHP, Laravel, WordPress, HTML5, CSS 3, jQuery, Bootstrap, MySQL, SQL Server, Git, Azure, AWS, Docker, Software Architecture & Design, Agile Software Development, Desktop Application development
💼 EVERY PROJECT AS A FULL STACK DEVELOPER INCLUDES
▪️ Clean, well-documented C# and .NET code with automated testing
▪️ Direct communication, just a senior C# Developer / .NET Developer working on your project
▪️ Ongoing support after launch as your long-term Full Stack Developer and .NET Developer partner
🏭 INDUSTRIES
Fintech · Healthcare · E-commerce · Logistics · SaaS · Real Estate · EdTech
🔎 ALSO EXPERIENCED AS
react developer · python developer · java developer · blockchain developer · mobile app developer · wordpress developer · full-stack web developer · python full stack developer · wordpress full stack · full stack developer react · c# .net developer · senior fullstack developer · .net full stack developer · senior .net developer · .net core developer · c developer · cs cart developer · qnap integration · c# wpf · c# angular · c# unity · javascript fullstack · fullstack web developer · full stake developer · c# game developer · full-stack development
Each project covers a real client engagement, twice over: react developer dashboard + rebuild; python developer API + script; java developer module + fix; blockchain developer audit + integration; mobile app developer release + update; wordpress developer site + migration; full-stack web developer scope; python full stack developer work; wordpress full stack rebuild; full stack developer react integration; c# .net developer contract; senior fullstack developer judgment; .net full stack developer discipline; senior .net developer oversight; .net core developer debugging; c developer fixes; cs cart developer migrations; qnap integration fixes; c# wpf builds; c# angular dashboards; c# unity prototypes; javascript fullstack proofs of concept; fullstack web developer delivery; full stake developer projects; c# game developer credits; full-stack development results.
🚀 LOOKING FOR A RELIABLE FULL STACK DEVELOPER OR .NET DEVELOPER?
👉 Hire a proven .NET Developer, C# Developer and Full Stack Developer.
📅 Last updated: 07.07.2026
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.
You share your idea — I prepare
I review your answers before the call and prepare focused questions so every minute is spent on decisions, not background.
SaaS architecture consultation call
We cover stack, architecture, auth, integrations, and delivery plan. You leave with a clear picture of what to build and how.