๐ง๐ผ๐ฝ ๐ฅ๐ฎ๐๐ฒ๐ฑ ๐ฃ๐น๐๐ | ๐ญ๐ฌ๐ฌ% ๐๐ผ๐ฏ ๐ฆ๐๐ฐ๐ฐ๐ฒ๐๐ | ๐ญ๐ฏ+ ๐ฌ๐ฒ๐ฎ๐ฟ๐ | ๐ด,๐ฌ๐ฌ๐ฌ+ ๐จ๐ฝ๐๐ผ๐ฟ๐ธ ๐๐ผ๐๐ฟ๐ | $๐ฎ๐ฌ๐ฌ๐+ ๐๐ฎ๐ฟ๐ป๐ฒ๐ฑ |
I'm a senior .NET / C# developer and Azure cloud architect who builds and scales production systems for companies that can't afford downtime or rework โ healthcare platforms, fintech products, e-commerce systems, and real estate/property-management software.
If your project needs more than someone who writes code to spec โ if you need someone who can architect the solution, own the delivery, and still be there for support six months later โ that's the role I take on.
WHAT I BUILD
โโโโโโโโโโโโโโโโโโโโโโโโ
โฆ SaaS Platforms โ multi-tenant, subscription-based .NET Core / Azure applications built to scale from a handful of users to enterprise volume
โฆ Healthcare Systems โ HIPAA-aware EHR/EMR platforms, HL7/FHIR integrations, and clinical workflow tools built to compliance standards
โฆ Fintech & Payments โ secure transaction processing, Stripe/PayPal integrations, reporting and reconciliation systems, PCI-conscious architecture
โฆ E-Commerce Platforms โ custom storefronts, order/inventory management, and integrations with payment gateways, CRMs, and ERPs
โฆ Real Estate & Property Management Systems โ listing platforms, tenant/lease management tools, and workflow automation for property teams
โฆ AI-Powered Features โ OpenAI/LLM integrations, intelligent document processing, and AI-assisted workflows added to existing .NET applications
โฆ Legacy Modernization โ turning outdated ASP.NET/VB.NET systems into maintainable, cloud-ready .NET 8 platforms without breaking what already works
TECH STACK
โโโโโโโโโโโโโโโโโโโโโโโโ
+ Backend: C# ยท .NET 8 / .NET Core ยท ASP.NET Core ยท ASP.NET MVC ยท Web API ยท Entity Framework Core ยท LINQ ยท Blazor ยท SignalR ยท Microservices ยท REST & SOAP APIs
+ Frontend: Angular ยท React ยท TypeScript ยท JavaScript ยท HTML5 ยท CSS3 ยท Blazor UI
+ Cloud & DevOps: Microsoft Azure (App Services, Functions, AKS, Service Bus, Key Vault, Azure SQL) ยท AWS (EC2, Lambda, RDS, S3) ยท Azure DevOps ยท GitHub Actions ยท CI/CD ยท Docker ยท Kubernetes ยท Infrastructure as Code
+ Databases: SQL Server ยท PostgreSQL ยท Cosmos DB ยท MongoDB ยท Stored Procedures & Query Optimization for high-volume systems
+ Integrations: Stripe ยท PayPal ยท Twilio ยท SendGrid ยท OAuth 2.0 ยท HL7 ยท FHIR ยท CRM/ERP integrations
HOW I WORK
โโโโโโโโโโโโโโโโโโโโโโโโ
I stay involved from architecture through deployment โ writing clean, documented, production-ready code, and communicating progress clearly at every step. I manage scope, timelines, and stakeholder expectations as carefully as I manage the codebase itself. Depending on what your project needs, I can work as a hands-on senior engineer, a solution architect, or a long-term technical lead.
I'll tell you honestly, early, if I'm the right fit for what you're building. Send me your project scope and I'll respond within a few hours.
VB.NET
.NET Framework
C#
Microsoft Azure
Azure DevOps Server
ASP.NET
ASP.NET MVC
ASP.NET Core
AWS Development
Azure DevOps
DevOps
ADO.NET
Microsoft SQL Server
Web Form
ASP.NET Web API
.NET Core
.NET Stack
Azure App Service
Angular
DevOps Engineering
William C.
San Rafael, California
$75/hr
5.0
11 jobs
Experienced full stack .net developer ready to build quality applications. I have worked for the smallest to the biggest companies and will put all I have learned to work for you.
VB.NET
Responsive Design
C#
JavaScript
CSS
HTML
Jenkins
jQuery
SQL Programming
AWS Application
SendGrid
Mailchimp
Mobile Web
PHP
API Integration
William C.
Fresno, California
$40/hr
5.0
4 jobs
๏ง Programming Languages โ C#, JavaScript, Python
๏ง Web Development โ ASP.NET Core, MVC, HTML, CSS, Angular
๏ง Mobile Development โ Xamarin, XAML
๏ง Desktop Development โ WPF, Windows Forms
๏ง Cloud Computing โ Amazon Web Services (AWS)
๏ง Database management โ SQL Server, Postgres, DynamoDB
VB.NET
.NET Framework
C#
.NET Core
ASP.NET Core
Microsoft SQL Server
HTML
JavaScript
CSS
Twilio
Mobile App
Amr A.
Atwater, California
$30/hr
5.0
6 jobs
Professional Summary
23 years of software development in general.
13 years experience in iOS / macOS, Objective-C & Swift development
1 year experience in Android, Java & Kotlin development
2 year GNUstep Linux, python, shell scripts, experience
7 years of Internet Applications / Web Development.
4 years experience using .Net Environment.
3 year experience in E-Commerce.
4 year experience in System analysis / design and development for Database applications.
iOS
Android
Swift
Kotlin
Python
SwiftUI
Linux
Richard S.
Huntington Beach, California
$75/hr
5.0
18 jobs
As a VB6 to .NET migration specialist, I help organizations unlock the full value of their legacy applications by transforming them into secure, modern, high-performance .NET solutionsโwithout disrupting business operations. With deep expertise in both classic VB6 architecture and the latest .NET frameworks, I streamline the migration process to reduce technical debt, improve maintainability, and extend system longevity. My approach blends precision engineering with practical business insight, ensuring every modernization effort enhances scalability, integrates seamlessly with todayโs technologies, and positions your organization for future growth. If you're ready to evolve beyond the limits of VB6, I deliver a clear, reliable path forward.
Tell us what you need. Create your own job post or generate one with AI then filter talent matches.
Hire top talent fast
Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.
Collaborate easily
Use Upwork to chat or video call, share files, and track project progress right from the app.
Payment simplified
Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.
Don't just take our word for it
โUpwork provides an umbrella-level of security. I can see a talentโs work history and ratings. I can hold payments in escrow. I can communicate through Upwork Messages instead of working through my email address.โ
KD
Kim Darling
Emerald Tiger
โUpwork is the best platform to hire skilled professionals when we're not looking for a full-time employee. All the companies in our portfolio use Upwork to find talent across a wide range of fields.โ
DM
David Merry
Kinetic Investments
โOur very specific requirements can be a challengeโWith Upwork, weโre able to access a bigger community to ensure the success of our projects.โ
KK
Katja Krohn
Summa Linguae
How do I hire a VB.NET Developer in California on Upwork?
You can hire a VB.NET Developer in California on Upwork in four simple steps:
Create a job post tailored to your VB.NET Developer project scope. We'll walk you through the process step by step.
Browse top VB.NET Developer talent on Upwork and invite them to your project.
Once the proposals start flowing in, create a shortlist of top VB.NET Developer profiles and interview.
Hire the right VB.NET Developer for your project from Upwork, the world's largest work marketplace.
At Upwork, we believe talent staffing should be easy.
How much does it cost to hire a VB.NET Developer?
Rates charged by VB.NET Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.
Why hire a VB.NET Developer in California on Upwork?
As the world's work marketplace, we connect highly-skilled freelance VB.NET Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream VB.NET Developer team you need to succeed.
Can I hire a VB.NET Developer in California within 24 hours on Upwork?
Depending on availability and the quality of your job post, it's entirely possible to sign up for Upwork and receive VB.NET Developer proposals within 24 hours of posting a job description.