You will get a full-stack ERP/CRM system with advanced workflows
Top Rated
Project details
You will get a scalable ERP/CRM system built from scratch or tailored to your business needs. I specialize in full-stack .NET and JavaScript development and will ensure advanced workflows, custom modules, and clean integration with your operations. Pricing may vary depending on project scope.
Programming Languages
ASP.NET, TypeScript, C#Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$3,000
|
Standard
$5,000
|
Advanced
$8,500
|
|---|---|---|---|
| Delivery Time | 21 days | 30 days | 45 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 5 | 10 | 15 |
Design Customization | |||
Content Upload | - | ||
Responsive Design | |||
Source Code | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$200 - $400
Additional Revision
+$100
Additional Page
(+ 2 Days)
+$150
Content Upload
(+ 1 Day)
+$120
Source Code
(+ 2 Days)
+$500Frequently asked questions
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JH
Jeremy H.
Oct 17, 2025
Development Estimate Required - PHP or .NET
Roman and the entire team at OSKI are true professionals who are committed to understanding business problems and finding appropriate technology solutions to difficult problems. We've been extremely happy with their .NET work and their ability to write custom integrations to a variety of different platforms via APIs.
If you need a hard working, extremely responsive and communicative team I would highly recommend Roman and his team.
If you need a hard working, extremely responsive and communicative team I would highly recommend Roman and his team.
AH
Anthony H.
Sep 28, 2024
Sybase to MSSQL sync - scoping project
JA
Jean A.
Mar 29, 2024
Software developer needed
PB
Paul B.
Nov 23, 2023
Umbraco Development
Great communication, quick responses and excellent frontend development work.
SD
Shawn D.
Jun 11, 2023
Part-time Powerbuilder Programmer
Did a great job on some difficult PowerBuilder/PowerServer tasks. I highly recommend Roman, he's top-tier.
About Roman
.NET & Node | React & Vue | C#, SQL, API | AI | Full Stack Developer
100%
Job Success
Zhitomir, Ukraine - 5:16 pm local time
🎯 What I bring to your brand as a Senior Full Stack Developer:
✔️ Over 20 years of commercial software engineering experience, leading .NET framework, C# development, and Node.js architectures for global enterprises.
✔️ Results-focused Full Stack Development: As a .NET Expert, I create scalable microservices architectures and API development plans that boost performance and handle high user concurrency. As a Software Architect, I ensure your custom software development is always ROI-driven and infinitely scalable.
✔️ Technical & Architecture Audit Mastery: As a Senior Full Stack Developer, I develop a detailed code audit, database audit, and technical architecture audit to map out your system structure. My cloud infrastructure expertise allows me to refine backend systems before scaling. I’ve delivered 150+ architecture audits and system performance reports, helping streamline software development workflows.
✔️ API Integration & Webhooks Expertise: As an API Specialist and backend developer, I prioritize REST APIs, GraphQL, and third-party integrations. My approach as a Software Architect focuses on secure authentication, OAuth2, and custom API architecture.
✔️ Frontend & Modern UI Solutions: As a Senior Full Stack Developer, I use React.js development and Vue.js optimization for high-performing user interfaces. As a .NET Expert, I handle Angular setups, UI component architecture, and frontend-to-backend integration to ensure your web application performs flawlessly.
✔️ Cloud Deployment & CI/CD Innovation: As an Azure developer and DevOps consultant, I use Docker containerization, Azure App Services, and Azure Functions to scale deployments.
✔️ Database & Performance Optimization: I am a database specialist and SQL Server developer. My technical data skills include PostgreSQL optimization, Entity Framework, and complex SQL queries. As a Software Architect, I ensure your database design is flawless using the best indexing and scaling strategies.
✔️ AI Integrations & Tooling: As an AI integration developer, I build C# and Python solutions for AI-driven services. My expertise includes pragmatic implementation of LLM APIs, OpenAI/Claude integrations, and utilizing the Model Context Protocol (MCP) to securely connect AI agents with backend systems and custom data sources without unnecessary over-engineering.
📊 My Achievements in Numbers:
🔶 Software Architect for a Global Enterprise (SaaS / B2B):
▪️ Improved API response times by 200% through technical code audit and query optimization.
▪️ Reduced cloud infrastructure costs by 50% via enhanced microservices architecture and Docker deployment.
▪️ Accelerated feature delivery by 30% using automated CI/CD pipelines and agile workflows.
🔶 Senior Full Stack Developer for a FinTech Platform:
▪️ Achieved 99.99% uptime through .NET migration and Node.js backend optimization.
▪️ Reduced database deadlocks by 100% with a technical database audit and SQL Server optimization.
🔶 API Specialist for an E-commerce Engine:
▪️ 2x checkout speed by redesigning the REST API and payment gateway integration (Stripe).
▪️ 3x faster user onboarding through architecture audit insights and Auth0 security implementation.
Why should you hire me as your Senior Full Stack Developer and Software Architect? ▪️ 20+ years in software engineering, backend architecture, API development, and cloud infrastructure.
▪️ Senior Full Stack Developer in React.js, Vue.js, Angular, and modern JavaScript.
▪️ .NET Expert in C#, ASP.NET MVC, Web API, and .NET.
▪️ Delivered enterprise backend services and microservices architectures for B2B and SaaS platforms.
▪️ Node.js Specialist support for high-concurrency event-driven applications.
▪️ Database architecture specialist for SQL Server, PostgreSQL, and MySQL growth.
▪️ Expert in Azure DevOps, Docker containerization, and CI/CD pipelines.
▪️ Practical experience in AI integrations, delivering C# and Python solutions for AI-driven services, including LLMs and MCP.
▪️ Software Architect and CTO with a proven track record of zero-downtime, secure deployments.
Specialized Development Services:
🔹 Architecture Audit: From database performance audit to technical code audit.
🔹 API Integration: From third-party API integrations to custom REST/GraphQL APIs.
🔹 Backend Development: From Node.js microservices to .NET Core enterprise systems.
🔹 Frontend & UI: React.js and Vue.js scalable applications.
🔹 Cloud & DevOps: Optimization for Azure App Services, Docker, and GitHub Actions.
🔹 AI Integrations: solutions for AI-driven services, LLM API endpoints, and MCP (Model Context Protocol) implementation.
Looking for an experienced Senior Full Stack Developer and Software Architect? Let’s connect!
Steps for completing your project
After purchasing the project, send requirements so Roman can start the project.
Delivery time starts when Roman receives requirements from you.
Roman works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Requirements Gathering
We'll review your current operations and define workflows, users, and data models
UI/UX Wireframing & Architecture Setup
I'll design wireframes and set up the base architecture (frontend, backend, and database)