You will get a multi-tenant SaaS with login, billing, and analytics
Top Rated
Project details
You will get a robust, scalable multi-tenant SaaS architecture built to handle user authentication, role-based access, subscription billing, and usage analytics out of the box. With deep experience in SaaS platform engineering, I specialize in designing secure systems that are future-proof, cloud-native, and optimized for growth. Whether you’re launching a new product or re-architecting, I’ll deliver a high-quality technical foundation tailored to your needs.
Programming Languages
ASP.NET, TypeScript, C#Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$3,500
|
Standard
$5,800
|
Advanced
$8,500
|
|---|---|---|---|
| Delivery Time | 10 days | 15 days | 20 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 3 | 5 | 8 |
Design Customization | |||
Content Upload | - | ||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$500 - $1,200
Additional Revision
+$150
Additional Page
(+ 2 Days)
+$300
Content Upload
(+ 1 Day)
+$200Frequently asked questions
21 reviews
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LB
Levon B.
Jan 13, 2026
providing estimate
JV
Joannes V.
Dec 1, 2025
C#/.NET Core webapp, team webmail
Awesome!
AT
Andrew T.
Nov 21, 2025
Web App
ID
Ivans D.
Oct 27, 2025
System audit & Modernization plan – ASP.NET / React / Azure Expert
Kyrylo delivered the audit on time and gave really useful insights. Thank you!
SH
Simon H.
Oct 23, 2025
.NET / MVC / Umbraco / Okta SSO expert
Kyrylo completed the project successfully and I wouldn't hesitate to work with him again if I ever need Umbraco / C# work again.
About Kyrylo
Full-Stack Development Partner for Modernization, SaaS & AI-Accelerate
100%
Job Success
Warsaw, Poland - 1:59 pm local time
Legacy systems draining budget, slowing delivery, and blocking growth?
At OSKI Solutions, we help companies modernize legacy applications and build scalable cloud-ready products with our 3x delivery strategy: experienced engineers + AI-assisted coding + disciplined execution.
That means you get more than just developers. You get a team that can move significantly faster on implementation, reduce repetitive work through AI-assisted workflows, and still keep architecture, maintainability, and business priorities under control. Most of our engineers are from Ukraine, and we’ve built a delivery model that combines strong technical talent with modern AI tools to help clients ship faster without sacrificing code quality.
Over the past 20+ years, I’ve worked as a senior engineer, architect, and ex-CTO, helping startups, SMBs, and enterprise clients rebuild outdated systems into secure, scalable, future-ready platforms. We work hands-on with .NET, Node.js, React, and modern cloud infrastructure to turn brittle systems into products that are easier to maintain, extend, and grow.
What we do best
Backend Development
.NET Core, ASP.NET MVC, C#, Entity Framework
Node.js, Express, REST APIs, GraphQL APIs
Microservices, event-driven systems, business-critical backend logic
Frontend Development
React, Next.js, TypeScript, Redux
Angular, Vue.js, SPA and PWA development
Responsive interfaces, Tailwind, Material UI
Legacy Modernization
Legacy .NET and custom business platform modernization
Monolith to modular/cloud migration
Performance, maintainability, and technical debt reduction
CMS & Business Platforms
Umbraco CMS, Umbraco Cloud, migrations, custom development
ERP-related systems and workflow platforms
Internal tools, client portals, dashboards, admin systems
Cloud & DevOps
Azure, AWS, Google Cloud
Docker, Kubernetes, CI/CD pipelines
GitHub Actions, GitLab CI, deployment automation
Databases
SQL Server, PostgreSQL, MySQL
MongoDB, Redis, caching and query optimization
API Integrations & SaaS
Stripe, PayPal, Twilio, SendGrid
Slack, Shopify, Zoom, QuickBooks, Google Maps
SaaS integrations, workflow automation, external service connectivity
Why clients choose OSKI Solutions
3x delivery strategy: senior engineers + AI-assisted coding + structured execution
20+ years of experience modernizing complex systems
CTO-level thinking focused on business outcomes, not just tickets
Full-cycle delivery from architecture to deployment
Lean, practical approach that keeps MVPs and modernization efforts within scope
Clear communication with weekly demos, tracked hours, and transparent reporting
Selected results
One Motion Technologies — designed and built ERP system from scratch
TutorPro — helped scale a SaaS platform, supporting 3x adoption growth in 2 years
Umbraco platforms — delivered 15+ CMS and business platforms, including cloud migrations and integrations
What our 3x approach means in practice
We use AI to accelerate coding, prototyping, refactoring, and repetitive engineering tasks — but not to replace engineering judgment.
The result is:
faster delivery,
cleaner implementation,
better budget efficiency,
and a stronger technical foundation for future scaling.
💬 Send me a message, and I’ll review your project, suggest the best approach, and give you a realistic next-step plan.
Steps for completing your project
After purchasing the project, send requirements so Kyrylo can start the project.
Delivery time starts when Kyrylo receives requirements from you.
Kyrylo works on your project following the steps below.
Revisions may occur after the delivery date.
Project Intake & Requirements Review
We'll begin by reviewing your business goals, technical needs, and desired features to ensure alignment with your SaaS vision.
Architecture Design & Multi-Tenant Strategy
We'll define the system architecture, choose the right multi-tenancy model (database-per-tenant or shared DB), and structure your app for scalability.