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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

  • Do you have a C# team available?

    As a company with C# development expertise, Altoros can extend your in-house talent with a dedicated team of engineers, architects, and project managers. Having deep knowledge around industry best practices and the Agile methodology, our developers build resilient, highly available, and production-grade apps.

  • What is the cost of hiring C# developers?

    The cost of C# development services at Altoros depends on the size of a dedicated team and project requirements. Contact us, and we will send you the price estimate.

  • What to look for in C# developers?

    Our specialists use C#, ASP.NET, .NET Framework, and .NET Core when delivering web, desktop, mobile, cloud, and IoT applications. Hire C# developers with 5–10 years of industry experience in a matter of days rather than months. Our company offers C# software development services under flexible pricing models (an hourly rate, fixed cost, or dedicated teams).

  • What differentiates Altoros from other C# development companies?

    At Altoros we focus on:

    • 72-hour onboarding
    • proven development methodologies
    • full protection of sensitive data
    • dedicated development teams shat scale on demand
    • transparent processes and regular communication

    We select and hire only the most qualified C# developers.

  • How do you ensure a high quality of the code?

    Being a company with C# development expertise, we adhere strictly to the ISO 9001 quality standards. To ensure customer satisfaction, we usually start with a small pilot project before moving on to major tasks. Additionally, you will be able to review the source code and the contributions by any of our engineers throughout the app life cycle.

Still have questions?
Let’s discuss

Contact us and get a quote within 24 hours

Damian Castelli
Business Development Manager