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Our C# development services

Application development on C#

As a company with C# software development expertise, we assist enterprises at each step of the development life cycle: from ideation to implementation and production release. Our experts build secure, reliable, and performant applications using proven methodologies and industry best practices.

Cloud-native application development on Microsoft Azure

As part of our C# development services, we help companies to improve portability, scalability, and maintenance by building cloud-native systems. Engineers at Altoros deploy applications on Azure Kubernetes Service, ensuring high availability, fault tolerance, data security, and stable performance with zero downtime.


In addition to C# development services, we help businesses with platform (e.g., Microsoft Azure to AWS), technology (ASP to ASP.NET or ASP.NET Core), and legacy app (to an updated stack) migration.

App modernization

Altoros offers application modernization services to improve performance and enable ease of maintenance for business-critical legacy monoliths. As a company with C# development expertise, we perform zero-downtime upgrades, ensuring uninterrupted user experience.

Maintenance and support

We provide 24/7 maintenance, support, and effective troubleshooting of your systems across all levels (infrastructure, platform, etc.).

Remote full-stack developers

70% of our engineers are full-stack experts with 7+ years of experience in the IT industry. Our teams are proficient in modern technologies: ASP.NET MVC, VB.NET, .NET Core, WCF, Entity Framework, Angular, JavaScript, jQuery, AJAX, etc.

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Extend your in-house talent with C# experts

As a company with C# software development expertise, we have an extensive pool of talent to build high-quality applications of any complexity.

A zero-risk 2-week trial period

Pay only if you are satisfied with our work

Middle C# Developer
Professional skills

Languages: C#, JavaScript

Frameworks: .NET Framework, ASP.NET MVC

Databases: MS SQL Server, PostgreSQL, Oracle

APIs: Facebook, PayPal, USPS, Endicia, Google BigQuery

5+ Years of experience
Senior C# Developer
Professional skills

Languages: C#, JavaScript, PL/SQL, SQL, Visual Basic

Frameworks: .NET Framework, ASP.NET, ADO.NET, WCF, LINQ, Telerik

Databases: Oracle

12+ Years of experience
C# Team Lead
Professional skills

Languages: C#, JavaScript, SQL, Visual Basic

Frameworks: .NET Framework, .NET Core, Angular 2, Entity Framework

Tools and technologies: Microsoft Visual Studio, Visual Studio Code, ASP.NET

Databases: Microsoft SQL Server, Microsoft Azure SQL Database

14+ Years of experience

Why choose Altoros as a C# development company?

Onboard experts within 72 hours of signing a contract. As a company with C# development expertise, we recruit, motivate, and manage experienced software engineers, enabling customers to focus on their business goals and deliver the project faster.

A scalable team. Quickly scale the team up and down or change the structure according to the project needs.

The experts at Altoros have 6–12 years of experience on average. We have developers with deep knowledge of healthcare, FinTech, logistics, e-commerce, insurance, sports, and other industries.

Agile processes. You will regularly receive updates at status meetings (daily, weekly, or biweekly). We move in frequent iterations, reporting the results by the end of each stage. When working with Altoros, you can evaluate the progress at any time and see whether the functionality implemented matches your vision.

Our customers speak

Since the company's foundation in 2001, Altoros has gone a long way to build a team of full-stack developers with solid technology expertise that has received a lot of positive customer testimonials.

Our customer satisfaction rate is95%according to our NPS surveys held on a 3-month basis. Learn more about our customers.




“I would definitely recommend Altoros for software development projects. It has been a pleasure working with them. There is a huge commitment from the team. The code quality and communication are top-notch. Absolutely would recommend hiring Altoros for software needs.”

Landon Swan, Co-founder of Likefolio




“The remit of the Altoros ops folks is to locate and stabilize a malfunctioning service and report it to the engineering team. If they can't stabilize it, they have permission to wake us up, but that's only happened once.”

Laurie Voss, Cofounder and COO at npm



Doubled our customer base and rolled out several new product lines

“In collaboration with our in-house team, our Altoros contractors swiftly identified and articulated critical paths against our roadmap. Altoros contractors were able to dive in from day one and meaningfully contribute to our engineering organization.”

Alex Scott, Co-founder at Revere

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Why use C# for web development?

With code reusability to accelerate release cycles, C# is a perfect choice for companies interested in developing highly scalable web apps and dynamic websites. The language also comes with numerous libraries to expand its functionality.

Hire C# developers at Altoros to benefit from the expertise of top specialists.

Frequently asked questions

  • What are the benefits of using C# for software development?

    C# is a powerful and versatile programming language that offers several benefits for software development, including:

    • Object-oriented programming (OOP) support for better code organization and maintenance
    • Strong type checking and automatic memory management for improved code reliability and security
    • Cross-platform compatibility with .NET Core for increased deployment flexibility
    • Integration with Microsoft technologies and tools for enhanced productivity and collaboration
  • How can Altoros help me with C# software development?

    Altoros is a professional software development company that offers comprehensive C# development services, including:

    • Custom software development tailored to your specific business needs and requirements
    • Legacy application modernization and migration to C# for improved performance and scalability
    • Third-party software integration with existing systems and databases
    • Quality assurance and testing to ensure bug-free and reliable software delivery
    • DevOps consulting and support to streamline the development process and accelerate time-to-market
  • What tech stack does Altoros use for C# development?

    Altoros has extensive experience with the following C# tech stack components:

    • .NET Framework and .NET Core for cross-platform development
    • ASP.NET and ASP.NET Core for web application development
    • Xamarin for cross-platform mobile app development
    • Azure and AWS for cloud deployment and hosting
    • SQL Server, MySQL, and PostgreSQL for database management
    • Git, Jira, and Confluence for project management and collaboration
  • How much does it cost to outsource C# development with Altoros?

    The cost of outsourcing C# development with Altoros depends on several factors, such as the project scope and complexity, desired features and functionalities, project timeline, engagement model, and more. To get an accurate cost estimate for your project, you can contact Altoros Labs for a free consultation and project assessment. Based on your requirements, they will provide you with a detailed proposal and cost breakdown.

  • Will my app idea be secure with you?

    As a leading C# development service provider, we value your privacy and ensure your app idea is secure with us. We will sign a Non-Disclosure Agreement (NDA) to keep your ideas safe, and only essential members of your dedicated development team will have access to your confidential data.

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Alex Tsimashenka
Business Development Director
+1 (650) 419-3379