.NET Development Services

A World-class .Net Development Company

.NET Development Services – Build, Modernize, and Scale Enterprise Software

Deliver reliable enterprise applications with Toptal’s .NET Development Services. Our .NET development engineers help organizations improve performance, reduce technical debt, and support changing business requirements.

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Clients Served

35,000+

Total Vetted Professionals

30,000+

Toptal Total Projects Delivered

85,000+

Years in Business

15+

TRUSTED BY LEADING BRANDS

Our Services

Toptal .NET Development Services

Strengthen enterprise software platforms with .NET services designed around your business goals. From new application development to modernization initiatives and ongoing support, our engineers help improve reliability, scalability, and delivery speed.

Custom .NET Application Development

Build .NET applications tailored to business requirements, operational workflows, and future growth objectives without sacrificing maintainability.

ASP.NET Web Application Development

Create responsive web applications that support modern user expectations while maintaining performance across devices.

.NET Architecture and Solution Design

Design scalable application architectures that support future enhancements while reducing complexity throughout the software life cycle.

Legacy Application Modernization

Modernize software platforms to improve maintainability, security, and long-term user adoption.

Cloud-native .NET Development

Develop cloud-native applications that take advantage of modern infrastructure capabilities while supporting operational flexibility.

.NET Application Integration

Connect business workflows and applications to improve information sharing and eliminate manual processes.

.NET Migration Services

Transition applications to modern .NET environments through structured migration approaches that minimize business disruption.

Microservices Development

Create modular services that support independent deployment cycles and allow applications to scale more effectively over time.

Azure and Cloud Development

Build Azure-based solutions that support application growth while improving reliability, performance, and flexibility.

Quality Assurance and Testing

Validate application behavior through testing approaches that identify defects earlier and reduce delivery-related risks.

DevOps and CI/CD Enablement

Implement automation practices that improve release consistency and help teams deploy software more efficiently.

Application Support and Maintenance

Provide ongoing support through monitoring, performance tuning, issue resolution, and routine application maintenance.

Looking for guidance about the perfect .NET development service for your needs?

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PARTNERSHIP THAT WORKS

How We Deliver .NET Development Services

Our .NET development experts, with experience at leading companies, develop and deploy tailored solutions to meet your business needs and unique industry demands for sustainable results and long-term success.

Discover

A leader from our team works with you to understand your business challenges, pain points, and strategic goals to uncover new opportunities and identify the options to reach your objectives.

Define

Toptal leaders collaborate with your team to define your specific goals and service needs, evaluating multiple approaches and aligning requirements with your strategic objectives to define the best solution.

Develop

We will create your unique project timeline, process, and first drafts, whether your goal is to migrate critical systems, strengthen application performance, or modernize enterprise software.

Deploy

Toptal will get to work, tracking quality assurance, handling project management, and maintaining the delivery schedule.

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Robert Orshaw

CEO, Technology Services

As Toptal’s CEO of Technology Services, Robert leads strategy and operations across our technical services portfolio, spanning AI, automation, and operations. He previously served as Deloitte’s Managing Director & Chief Commercial Officer, transforming its Cloud Operate and Engineering business into a multibillion-dollar operation. He held senior roles at IBM, Velocity, co-founded Corio, and was CIO for two Fortune 500 companies.As Toptal’s CEO of Technology Services, Robert leads strategy and operations across our technical services portfolio, spanning AI, automation, and operations. He previously served as Deloitte’s Managing Director & Chief Commercial Officer, transforming its Cloud Operate and Engineering business into a multibillion-dollar operation. He held senior roles at IBM, Velocity, co-founded Corio, and was CIO for two Fortune 500 companies.

Previously At

CUSTOMIZED SOLUTIONS

.NET Development Solutions That Deliver Value

Toptal delivers leading .NET development services through its diverse talent network and flexible delivery models. We implement the right skills at each project phase, blending expertise from various roles for seamless execution.

End-to-End Delivery by Toptal
On-demand Talent & Teams

End-to-End Delivery by Toptal

Comprehensive project delivery, tailored to your specific requirements.

CEO, Technology Services

Delivery Manager

Senior .NET Developer

Full-stack .NET Developer

.NET Solutions Architect

Azure Solutions Architect

Full-stack .NET Developer

.NET Back-end Developer

Robert Orshaw

CEO, Technology Services

Previously at

Technology Experience

35+ Years

Rachael Karaffa

Delivery Manager

Rachael serves as a Delivery Manager at Toptal with a focus on leading diverse global teams in developing innovative solutions for our clients. She works across multiple disciplines, including technology, marketing, and management consulting. Rachael specializes in managing people and client relationships, process optimization, and driving teams toward optimal business outcomes.

Previously Managed Client

Experience

9+ Years

Mohamed Fakhreddine

Verified Expert in Engineering

22+ Years

of Experience

Senior .NET Developer

Mohamed is a senior full-stack developer with 22+ years of experience at companies like Microsoft, Amazon, Google, and Facebook. His experience spans a wide range of technologies, from Angular 2 to Java and .NET. He is a team player and passionate about dynamic web applications built on REST services.

Previously at

Tiago Chilanti

Verified Expert in Engineering

23+ Years

of Experience

Full-stack .NET Developer

Tiago is a full-stack developer with 23 years of experience. His preferred technologies are Angular 2+ on the front end, C# .NET on the back end. He's experienced in ideating, managing, and developing solutions from the ground up. He's also a certified scrum master/product owner and agile methodologies enthusiast with experience managing scrum teams. He's worked for both startups and notable companies like HP and Dell.

Previously at

John Gibbons

Verified Expert in Engineering

29+ Years

of Experience

.NET Solutions Architect

Since 1997, John has been working as a professional software developer. He started his technical career as an Excel RAD developer at Goldman Sachs and now specializes in system architecture and development on the Microsoft stack (Azure, ASP.NET Core/5, C#, Microsoft SQL Server). He communicates well, listens carefully to your requirements, comprehends what needs to get done, and then delivers high-quality well-tested code to move you forward.

Previously at

Jose Miguel Arreola

Verified Expert in Engineering

16+ Years

of Experience

Azure Solutions Architect

Jose is a software architect and developer with desktop, web, mobile apps, and big data expertise. He worked at billing for Microsoft using Azure, power apps, flows, and the big data platform, one of the world's biggest clusters. He co-founded a last-mile delivery app called Encalientes that connects restaurants with customers and drivers. Jose's contributions to the app were critical for it to reach over 60,000 active users and become operational in four cities.

Previously at

Anne Adams

Verified Expert in Engineering

20+ Years

of Experience

Full-stack .NET Developer

Anne is an experienced developer who has worked both for large corporations and startups. After building financial trading applications for eight years as an engineer at Merrill Lynch, Anne founded and built LoudUp, a music-based social network that she designed, developed, and launched from the ground up. She specializes in .NET technologies and JavaScript.

Previously at

Erez Nassimi

Verified Expert in Engineering

32+ Years

of Experience

.NET Back-end Developer

Erez has 32 years of experience in software development and 15 years in team building and management. His expertise covers multiple languages (C++, C#, Pascal, SQL), frameworks (.NET), paradigms (OOP, REST), platforms (Windows), protocols (Diameter, FIX), including API development, design patterns, web scraping, and clean coding. Familiar with stock options, currency exchanges, and trading/algo-trading, he has won innovation awards at Amdocs, contributing to CodeProject and StackOverflow.

Previously at

On-demand Talent & Teams

30,000+ vetted professionals, ready to deploy individually or in teams.

Full-stack .NET Architect

ASP.NET Developer

.NET Developer

ASP.NET Core Developer

.NET Core Developer

.NET Developer

Enterprise .NET Developer

.NET Developer

.NET Solutions Developer

Verified Expert in Engineering

24+ Years

of Experience

Full-stack .NET Architect

Tao is a senior full-stack developer and architect who worked on over 14 million lines of code on large-scale, real-time acquisition software projects. He primarily focused on the back end for more than 24 years. Tao's expertise is mainly in C++, C#, Java, Python web development, performance optimization, and troubleshooting in Azure and AWS.

Previously at

Verified Expert in Engineering

25+ Years

of Experience

ASP.NET Developer

Anmar is a senior full-stack developer with over 25 years of experience. Passionate about continuous learning, he adeptly adopts new technologies to tackle real-world challenges. With a self-taught, versatile skill set and a resilient 'can-do-anything' attitude, Anmar's expertise spans ASP.NET, SQL, Bootstrap, Excel VBA, Git, jQuery, JavaScript, and Java, with a commitment to ongoing technical growth. He will be a great addition to any team.

Previously at

Verified Expert in Engineering

23+ Years

of Experience

.NET Developer

Tim has over 23 years of experience in software development. He has also spent several years working as a freelancer for companies of varying sizes, ranging from large enterprises to early-stage startups, helping bring their ideas to life. He specializes in ASP.NET, .NET, C#, SQL Server Integration Services (SSIS), MySQL, and Python. Tim’s extensive background enables him to ramp up on projects of any size quickly and efficiently.

Previously at

Verified Expert in Engineering

18+ Years

of Experience

ASP.NET Core Developer

Giorgi is a software developer with more than 18 years of experience. He works mainly with C#, ASP.NET Core, REST, GraphQL, MAUI, Xamarin, Entity Framework Core, AWS, Azure, and SQL Server. He has also worked with many other frameworks and systems, such as ASP.NET MVC, ASP.NET Web API, WCF, Avalonia, WinForms, Oracle, and many more. Giorgi is an open-source author and contributor on GitHub, a Microsoft MVP, and a member of the .NET Foundation.

Previously at

Verified Expert in Engineering

16+ Years

of Experience

.NET Core Developer

David is a software engineer and an adjunct computer science professor at Stevens Institute of Technology in Hoboken, New Jersey. They’ve been involved in a number of startup businesses and have worked in the financial services sector on high-bandwidth/high-transaction computing. David is an expert in C#/.NET and TypeScript, having used both since initial betas; they also do regular work with .NET Core and Node.js on the back end and React, Angular, Cordova, and Ionic on the front end.

Previously at

Verified Expert in Engineering

14+ Years

of Experience

.NET Developer

Alonso is a professional software engineer with more than 14 years of experience creating highly maintainable software products. He’s a seasoned full-stack developer with test automation experience. Thanks to his excellent communication skills and a keen eye for specification analysis, Alonso delivers bug-free solutions that fully meet the client’s requirements.

Previously at

Verified Expert in Engineering

19+ Years

of Experience

Enterprise .NET Developer

Remya has more than 19 years of software development experience, is very passionate about coding, and is committed to her work. She has extensive experience mainly on .NET frameworks from .NET 2.0 until .NET Core. Remya's main area of focus is building back-end APIs in C# and VB.NET, and she is also experienced in IBM MQ, Apache Kafka, Microservices, and PL/SQL coding.

Previously at

Verified Expert in Engineering

29+ Years

of Experience

.NET Developer

Star has been consulting and developing software for 29+ years, with special skills in capturing and communicating requirements, data modeling, and modeling business processes. Her experience largely focuses on media production workflow management, and she has an interest in optimization and complexity reduction in enterprise-level data systems. Her primary platform choices are C# and related Microsoft tools.

Previously at

Verified Expert in Engineering

31+ Years

of Experience

.NET Solutions Developer

Anderson is a software engineer who’s strongly committed to delivering the best solution for the problem. In his more than 31 years in the IT industry, he’s worked on projects in custom web development, collaboration portals, e-learning platforms, enterprise resource planning, content management systems, project management tools, mobile apps, reporting, and business intelligence platforms up to Internet of Things projects. Anderson has an MBA in project management and holds a PMP and MCSD .NET certification.

Previously at

Looking for guidance about the perfect .NET development service for your needs?

Get a Free Consultation Now

Looking for guidance about the perfect .NET development service for your needs?

UNRIVALED EXPERTISE

Our Talent Has Worked With Top Companies

Having previously worked with these leading global companies, our talent brings valuable insights and expertise to deliver world-class outcomes.

Why organizations choose us

Toptal in Action

Discover the cutting-edge benefits our clients enjoy with the global Toptal network.

Toptal builds a scalable .NET ERP platform, modernizing child care management.

Challenge: Child Care Seer founder Tom Callahan saw the potential to improve the service level and profitability of the child care industry. He required highly skilled software experts to bring his solution to market.

Solution: Toptal’s team of specialists developed the Child Care Seer platform, cutting-edge ERP software that optimizes child care management. To build the back end, they leveraged ASP.NET frameworks for Microsoft SQL Server and AWS to host the entire configuration. They used Vue.js to build a front end that works seamlessly with the API.

Outcome: The custom-curated Toptal team of specialists helped bring Child Care Seer software to market in record time, significantly improving business profitability.

If you want to fail fast, do it the other way. If you want to succeed, use Toptal.

Tom Callahan

Founder, Child Care Seer

Read Full Case Study

Toptal Ranked #1 Most Reliable Professional Services Company in America

Newsweek and Statista’s rankings were based on an independent survey of more than 2,400 decision-makers at Fortune 500s.

IBM — Newsweek's Most Reliable Companies in America 2026 ranking. Toptal is ranked #11, the highest-ranked professional services firm.

See the Most Reliable Companies in America

Methodology for the Rankings

How likely the respondent is to recommend the selected company to others.

Measures the convenience of interaction with the company and efficiency of processes.

Measures the company’s cost-effectiveness and quality relative to price.

Measures whether the company consistently meets or exceeds expectations in quality and timeliness of deliverables.

Measures the company’s ability to consistently fulfill commitments and maintain customer trust.

See the Most Reliable Companies in America

OUR THOUGHT LEADERSHIP

Explore Insights From the .NET Development Field

Read the latest articles and resources to keep you current on emerging trends in .NET development, cloud application modernization, enterprise architecture, and more.

How to Boot-strap and Create .NET Projects

To create a .NET project from scratch, simply using Visual Studio Wizard is good enough most of the time. However, the default project settings produced by wizards are hardly acceptable for professional teams, as they set too low of a bar on quality. In this article, Toptal Freelance Software Engineer Andrei Smirnov guides us through several standard practices, configuration files, and project settings every developer should apply when starting a new .NET project. Doing this in the very beginning of a project decreases future technical debt and makes product source code readable and professional-looking.

Andrei Smirnov

Verified Expert in Engineering

Andrei is a back-end and protocol engineer with more than 20 years of experience working for organizations including Chainlink Labs, Microsoft, EMC, Motorola, and Deutsche Bank. He has delivered software across web and mobile environments, with expertise spanning C#, .NET, Go, and distributed systems. Today, Andrei focuses on back-end architecture and platform development, helping organizations build scalable and reliable software solutions.

Previously at

An Elasticsearch Tutorial for .NET Developers

Ivan Cesar

Verified Expert in Engineering

Ivan has a decade of work on projects of all sizes, mostly using .NET technologies. He also likes to take part in algorithm competitions.

Caching and Connection Handling in .NET: An Aspect-Oriented Programming Tutorial

Marko Pađen

Verified Expert in Engineering

Marko has over a decade of experience with large-scale software including architecture, design, coding, testing, documentation, and release.

.NET on Linux: Simpler Than It Seems

Zablon Dawit

Verified Expert in Engineering

Zablon is a full-stack web developer specializing in ASP.NET and JavaScript. He has created enterprise software for various companies, including Pelmorex Corp and S.R.E Software Development.

.NET Development Related Offerings

Explore Related Services and Roles

Pair Toptal’s .NET Development Services with related competencies to effectively tackle your business challenges.

Looking for guidance about the perfect .NET development service for your needs?

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