Hire the Best .NET Core Developers
in the United States

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
4.5/5
of Upwork by G2 peer reviewers
Aamir M.

Tampa, Florida

$69/hr
4.8
78 jobs

๐Ÿ‘‹ Welcome to my Web App Development Profile! I'm Aamir Munir, a dedicated Full Stack Web Developer with expertise in .NET Core and MERN Stack technologies. I hold a Bachelorโ€™s degree in Computer Science and specialize in building scalable, high-performance web applications tailored to your business needs. With experience across both frontend and backend development, Iโ€™m passionate about delivering clean code, intuitive user interfaces, and robust backend systems that drive results. Whether you need a full web solution or want to enhance an existing application, Iโ€™m here to help you succeed. ๐Ÿ’ผ My Core Expertise: โœ… Full Stack Web Development using .NET Core and MERN Stack โœ… Designing and developing RESTful APIs & scalable backend systems โœ… Creating modern, responsive, and user-friendly interfaces โœ… Database design, modeling, and optimization (SQL & NoSQL) โœ… End-to-end application development: From idea to deployment โœ… Strong problem-solving skills and a collaborative mindset ๐ŸŽจ Frontend Technologies โœ… HTML5 โœ… CSS3 โœ… JavaScript (ES6+) โœ… React.js โœ… Redux โœ… Bootstrap โœ… Tailwind CSS โœ… Razor Views (ASP.NET MVC) ๐Ÿ–ฅ๏ธ Backend Technologies โœ… .NET Core / ASP.NET MVC โœ… C# โœ… Entity Framework Core โœ… Node.js โœ… Express.js โœ… REST API Development โœ… Authentication & Authorization (JWT, OAuth) ๐Ÿ—ƒ๏ธ Databases โœ… Microsoft SQL Server โœ… MongoDB โœ… PostgreSQL (Basic) ๐Ÿ› ๏ธ Tools & Workflow โœ… Visual Studio / VS Code โœ… Git & GitHub โœ… Postman โœ… Docker (Basic knowledge) โœ… Agile Tools (Jira, Trello) Iโ€™m committed to delivering high-quality software solutions on time and on budget. Letโ€™s work together to build something impactful, functional, and future-ready. ๐Ÿ“ฉ Feel free to invite me to your job or send a message Iโ€™m always happy to chat #FullStackDeveloper #.NetCore #ASPNETMVC #CSharpDeveloper #MERNStack #ReactJS #NodeJS #ExpressJS #MongoDB #SQLServer #JavaScriptDeveloper #HTML5 #CSS3 #RESTAPI #EntityFramework

  • .NET Core
  • JavaScript
  • ASP.NET MVC
  • ASP.NET
  • Android App Development
  • Web Design
  • iOS Development
  • Full-Stack Development
  • SQL Programming
  • PHP
  • jQuery
  • ASP
  • ActiveX
Ian A.

Littleton, Colorado

$65/hr
5.0
4 jobs

Senior AI Full Stack Engineer with strong experience building enterprise-grade SaaS platforms, AI-powered systems, and scalable cloud applications using C#/.NET, ASP.NET Core, Azure, React, and modern AI technologies. Specialized in designing high-performance backend architectures, RESTful APIs, AI integrations, and cloud-native applications across enterprise and startup environments. Experienced in developing scalable systems using ASP.NET Core, Entity Framework, PostgreSQL, SQL Server, Docker, and modern CI/CD workflows. Strong background integrating AI capabilities into real-world business systems using OpenAI APIs, Claude APIs, embeddings, automation workflows, and intelligent document/data processing pipelines. Experienced building AI-powered features such as conversational assistants, semantic search systems, workflow automation tools, and internal business copilots. Experienced with React, Next.js, TypeScript, and modern frontend architectures to deliver scalable and responsive user experiences for SaaS platforms, dashboards, and enterprise applications. Comfortable working across the full product lifecycle including architecture, development, cloud deployment, optimization, and long-term scalability. Adaptable and collaborative engineer with strong communication skills and experience working closely with cross-functional teams, stakeholders, and fast-moving startup environments. Comfortable translating complex technical requirements into practical solutions while maintaining clear communication, flexibility, and a strong focus on long-term product value.

  • .NET Framework
  • JavaScript
  • TypeScript
  • C#
  • ASP.NET Core
  • RESTful API
  • Microservice
  • React
  • Next.js
  • OpenAI API
  • Artificial Intelligence
  • Claude
  • Automation
  • Microsoft Azure
  • CI/CD
  • PostgreSQL
  • Microsoft SQL Server
  • Software Architecture
  • Node.js
  • Amazon Web Services
Tim T.

St. Louis, Missouri

$15/hr
5.0
5 jobs

I design and develop scalable, user-friendly web applications with a focus on innovation and efficiency. With a decade of experience, I excel in tackling complex coding challenges and managing multiple projects simultaneously. My strong foundation in software engineering is complemented by my passion for AI development, where I explore cutting-edge technologies to enhance user experiences. As a founder and lead developer, I have prioritized collaborative teamwork, mentoring fellow engineers, and fostering an environment that encourages creative problem-solving. If you're seeking a versatile developer who can deliver high-quality solutions while adapting to your unique project needs, let's connect and discuss how I can help bring your ideas to life.

  • Web Development
  • Product Development
  • Web Application
  • Artificial Intelligence
  • Android App Development
  • iOS Development
  • App Development
  • Mobile Game
  • Python
  • C#
  • ASP.NET Core
  • HTML
  • Database
  • Database Administration
  • SwiftUI
Oleg U.

Boca Raton, Florida

$60/hr
5.0
104 jobs

Microsoft 365 | SharePoint Online | Azure | Power Apps | Power Automate | Power BI | Microsoft Teams | OneDrive | Artifitial Inteligence (AI) Hello and thank you for visiting my page. Over the past 15 years, Iโ€™ve helped organizations like yours adopt the tools in the Microsoft 365 & SharePoint ecosystem, including SharePoint Online, Power Apps, Power Automate, Copilot, Power BI, Microsoft Teams, Project Online, Planner, OneDrive, and Exchange. By doing this, my team and I empower users, optimize operations, and ultimately transform their businesses. I build intranets, extranets, and collaboration solutions using SharePoint 2013/2016/2019/Online, Power Pllatform, SPFx, React, C#, .Net Core, JavaScript, TypeScript, Microsoft Teams, OneDrive, and other features in Microdoft 365. I'm extremely proficient in optimizing operations by automating manual business processes, migrating on-premise solutions to the cloud, and enhancing reporting for actionable insights. I use cutting edge no-code Power Platform to build forms and automate processes as well as custom solutions development and integrations. My personal goal is to deliver perfectly designed solutions. I always ensure perfect UI/UX design in custom SharePoint Online branding and Power Apps development projects.

  • .NET Core
  • Microsoft Azure
  • Intranet Implementation
  • Microsoft SharePoint Development
  • JavaScript
  • C#
  • Application Integration
  • Microsoft PowerApps
  • Microsoft Power Automate
  • Microsoft SharePoint Designer
  • Angular
  • Microsoft SharePoint Administration
  • React
Ayaz A.

Sacramento, California

$25/hr
5.0
7 jobs

๐’๐ž๐ง๐ข๐จ๐ซ .๐๐„๐“ ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ž๐ซ | ๐€๐’๐.๐๐„๐“ ๐‚๐จ๐ซ๐ž ยท ๐€๐ณ๐ฎ๐ซ๐ž ยท ๐’๐š๐š๐’ ยท ๐Œ๐ข๐œ๐ซ๐จ๐ฌ๐ž๐ซ๐ฏ๐ข๐œ๐ž๐ฌ ยท ๐€๐ˆ ๐ˆ๐ง๐ญ๐ž๐ ๐ซ๐š๐ญ๐ข๐จ๐ง If you need a .NET system that actually scales, not just one that works today, you're in the right place. I help startups and enterprises design, build, and modernize web applications, cloud platforms, and APIs using C#, ASP.NET Core, and Microsoft Azure, with 11 years of experience turning complex business problems into clean, maintainable software. ๐–๐ก๐š๐ญ ๐œ๐ฅ๐ข๐ž๐ง๐ญ๐ฌ ๐ฎ๐ฌ๐ฎ๐š๐ฅ๐ฅ๐ฒ ๐œ๐จ๐ฆ๐ž ๐ญ๐จ ๐ฆ๐ž ๐ฐ๐ข๐ญ๐ก: A legacy .NET Framework or MVC app that needs modernization to .NET 8/9 or Azure A SaaS product idea that needs to be architected from scratch with multi-tenancy, auth, and scalable APIs A backend that's slowing under load and needs refactoring, query optimization, or cloud migration A DevOps bottleneck, no CI/CD pipeline, manual deployments, fragile release process An enterprise integration project, third-party APIs, payment gateways, ERP connectors, or real-time data workflows ๐ˆ'๐ฏ๐ž ๐ฌ๐จ๐ฅ๐ฏ๐ž๐ ๐š๐ฅ๐ฅ ๐จ๐Ÿ ๐ญ๐ก๐ž๐ฌ๐ž. ๐‡๐ž๐ซ๐ž'๐ฌ ๐ก๐จ๐ฐ ๐ˆ ๐ฐ๐จ๐ซ๐ค: --๐๐š๐œ๐ค-๐„๐ง๐ & ๐€๐๐ˆ ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ฆ๐ž๐ง C#, ASP.NET Core (2.0โ€“9.0), Web API, gRPC, SignalR, Blazor Server and WASM, clean architecture, CQRS, repository pattern, microservices, I don't just write code, I design systems that are easy to extend six months later. --๐‚๐ฅ๐จ๐ฎ๐ & ๐ˆ๐ง๐Ÿ๐ซ๐š๐ฌ๐ญ๐ซ๐ฎ๐œ๐ญ๐ฎ๐ซ๐ž, ๐€๐ณ๐ฎ๐ซ๐ž & ๐€๐–๐’ Azure App Services, Functions, Logic Apps, Service Bus, Key Vault, Blob Storage, Azure SQL, Cosmos DB. AWS: EC2, S3, RDS, Lambda. I design cloud-native architectures that are cost-aware, secure, and production-ready from day one. --๐ƒ๐ž๐ฏ๐Ž๐ฉ๐ฌ & ๐‚๐ˆ/๐‚๐ƒ Azure DevOps, GitHub Actions, GitLab CI/CD, Jenkins, Bitbucket Pipelines, Docker, Kubernetes. I set up automated build and release pipelines so your team ships faster with fewer surprises. Front-End Angular (v2โ€“v19), React.js, TypeScript, Tailwind CSS, Material UI, Bootstrap, full-stack delivery when your project needs it. Databases SQL Server, Azure SQL, PostgreSQL, MySQL, MongoDB, Cosmos DB, Entity Framework Core (6/7/8), stored procedures, query optimization. I've rescued databases drowning in N+1 queries and missing indexes. Integrations & Security REST APIs, OAuth2, JWT, SSO, Stripe, PayPal, Authorize.Net, SendGrid, Twilio, WebSockets, OpenAPI/Swagger. --๐€๐ˆ-๐€๐ฌ๐ฌ๐ข๐ฌ๐ญ๐ž๐ ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ฆ๐ž๐ง๐ญ I integrate AI APIs and LLM-powered features into .NET applications ,from OpenAI-based document processing to intelligent automation workflows, helping you ship smarter products without building an ML team. ๐–๐ก๐š๐ญ ๐ฆ๐š๐ค๐ž๐ฌ ๐ฆ๐ž ๐๐ข๐Ÿ๐Ÿ๐ž๐ซ๐ž๐ง๐ญ ๐Ÿ๐ซ๐จ๐ฆ ๐จ๐ญ๐ก๐ž๐ซ .๐๐„๐“ ๐๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ž๐ซ๐ฌ ๐จ๐ง ๐”๐ฉ๐ฐ๐จ๐ซ๐ค: I've led development teams, architected systems from greenfield to enterprise scale, and mentored junior developers across startup and Fortune 500 environments. I don't disappear after handing over code,, I think about long-term maintainability, onboarding cost, and your next developer's experience. I communicate clearly, give proactive updates, flag risks early, and deliver on time. I've worked across healthcare, fintech, residential management, and enterprise SaaS, I understand that your software isn't just a technical project, it's a business product. ๐ˆ๐ง๐๐ฎ๐ฌ๐ญ๐ซ๐ข๐ž๐ฌ ๐ฌ๐ž๐ซ๐ฏ๐ž๐: Healthcare ยท Fintech/Payments ยท Residential & Property Management ยท Enterprise SaaS ยท E-commerce ยท Internal Tooling ๐„๐ง๐ ๐š๐ ๐ž๐ฆ๐ž๐ง๐ญ ๐ฆ๐จ๐๐ž๐ฅ๐ฌ: Long-term retainer ยท Project-based ยท Team augmentation ยท Project rescue ยท Architecture consulting ๐‘ณ๐’†๐’•'๐’” ๐’•๐’‚๐’๐’Œ ๐’Š๐’‡ ๐’š๐’๐’– ๐’๐’†๐’†๐’… ๐’‚ ๐’”๐’†๐’๐’Š๐’๐’“ .๐‘ต๐‘ฌ๐‘ป ๐’†๐’๐’ˆ๐’Š๐’๐’†๐’†๐’“ ๐’˜๐’‰๐’ ๐’ƒ๐’“๐’Š๐’๐’ˆ๐’” ๐’ƒ๐’๐’•๐’‰ ๐’•๐’†๐’„๐’‰๐’๐’Š๐’„๐’‚๐’ ๐’…๐’†๐’‘๐’•๐’‰ ๐’‚๐’๐’… ๐’ƒ๐’–๐’”๐’Š๐’๐’†๐’”๐’” ๐’•๐’‰๐’Š๐’๐’Œ๐’Š๐’๐’ˆ ๐’•๐’ ๐’š๐’๐’–๐’“ ๐’‘๐’“๐’๐’‹๐’†๐’„๐’•.

  • .NET Core
  • ASP.NET
  • ASP.NET MVC
  • C#
  • Angular
  • AngularJS
  • React
  • Azure DevOps
  • Azure Cosmos DB
  • MySQL
  • Vue.js
  • Bootstrap
  • AWS Lambda
  • SQL
  • Blazor
  • DevOps
  • AWS Cloud9
  • AWS IoT Analytics
  • JavaScript
  • Microsoft 365 Copilot
Gleb U.

Cincinnati, Ohio

$45/hr
4.8
18 jobs

I build custom C# / .NET software for businesses that need reliable desktop applications, internal tools, and practical workflow solutions. My main experience is in Windows desktop development and business software. I work with C#, WPF, MAUI, ASP.NET Core, Razor, MVC, MVVM, SQL, Entity Framework, and Web API, and Iโ€™m also interested in Blazor-based internal applications. Iโ€™m a good fit for projects involving internal tools, workflow systems, document generation, printing features, integrations, and software that supports day-to-day operations. I work well on MVPs, prototypes, and milestone-based projects where the goal is to turn a business need into a practical working solution. I can take ownership of a project, communicate clearly, and make practical decisions to keep development moving. I can also help refine requirements as the project evolves. In many business applications, the best solution becomes clearer during implementation, and Iโ€™m comfortable helping shape that process while keeping the work structured and aligned with the clientโ€™s goals. Iโ€™m especially interested in .NET applications for internal platforms, admin tools, business automation, and AI-assisted workflow solutions where the technology supports a real business need. I usually prefer fixed-price or milestone-based projects when the scope is clearly defined, because it keeps the process transparent and predictable for both sides. If you need help building, improving, or supporting a .NET desktop application, internal business tool, or custom software solution, Iโ€™d be glad to discuss your project.

  • .NET Framework
  • C#
  • .NET Stack
  • Windows Presentation Foundation
  • Desktop Application
  • ASP.NET Core
  • Blazor
  • ASP.NET Web API
  • API Integration
  • SQL
  • Entity Framework
  • Model View ViewModel
  • XAML
  • Razor Template Engine
  • Web Services Development
  • Azure App Service
  • Microsoft Azure
  • ASP.NET MVC

How it works

Post a job for free Post a job

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

How do I hire a .NET Core Developer in the United States on Upwork?

You can hire a .NET Core Developer in the United States on Upwork in four simple steps:

  • Create a job post tailored to your .NET Core Developer project scope. We'll walk you through the process step by step.
  • Browse top .NET Core Developer talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top .NET Core Developer profiles and interview.
  • Hire the right .NET Core 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 .NET Core Developer?

Rates charged by .NET Core 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 .NET Core Developer in the United States on Upwork?

As the world's work marketplace, we connect highly-skilled freelance .NET Core Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream .NET Core Developer team you need to succeed.

Can I hire a .NET Core Developer in the United States 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 .NET Core Developer proposals within 24 hours of posting a job description.