KISS Software / What we do / web development expertise / Custom Web Development in C# and .NET for Scalable Business Solutions

Custom Web Development in C# and .NET for Scalable Business Solutions

We develop reliable C# and .NET web applications — from corporate platforms to high-load portals. Our architecture is designed for growth, security, and fast integration. KISS Software delivers custom .NET solutions tailored to your business processes and digital transformation goals.

Get a .NET architect consultation

    Why choose KISS Software?

    • Experts in .NET and complex business logic
      Experts in .NET and complex business logic

      We work with distributed systems, enterprise architectures, and high-requirement environments.

    • Flexible approach for your tech stack and infrastructure
      Flexible approach for your tech stack and infrastructure

      We integrate seamlessly into your existing IT ecosystem — without unnecessary restructuring.

    • Clean code, transparent architecture, and documentation
      Clean code, transparent architecture, and documentation

      Your product remains easy to maintain, understand, and scale.

    What we deliver for your project

    Build a robust .NET application tailored to your needs

    Performance, security, and scalability are embedded from day one.

    Design intuitive UI/UX for employees and customers

    Interfaces are validated with real use cases before launch.

    Integrate with your internal systems and services

    CRM, ERP, payments, logistics — we automate secure data exchange.

    Ensure high performance and fault tolerance

    We apply proven .NET patterns and optimization tools.

    Set up DevOps, CI/CD, and a secure release environment

    Deploy updates without downtime and with full error tracking.

    Provide technical support and long-term product growth

    From bug fixing to scaling for thousands of users.

    Ready to launch a secure and scalable .NET application?

    Tell us your challenge — we’ll prepare a precise implementation plan
    Estimate project scope and timeline

      Our projects

      More projects

      Testimonials

      Мы заказывали у KISS Software анимацию для 2D-платформера. Ребята сразу поняли нашу стилистику, предложили интересные решения по эмоциям персонажей, а результат превзошёл ожидания. Игроки отмечают именно «живость» анимации. Будем работать ещё.
      Андрей
      гейм-дизайнер
      Нужно было подключить аутсорс на этапе риггинга и внутриигровых синематиков под Unreal Engine. KISS вошли в проект аккуратно, без долгих вводных, всё отдали в срок, багов — ноль. Отличная техничка, быстрая реакция и понимание продакшн-процесса.
      Михаил
      продюсер, студия разработки игр
      Уже третий проект делаем с командой KISS — всегда всё прозрачно, по делу и вовремя. У них реально хорошее чувство гейм-драмы и движущейся композиции. Отдельно ценим их подход к оптимизации под мобильные платформы.
      Денис
      CEO

      Development stages

      Full-cycle .NET development — from architecture design to scaling and support.
      1
      2
      3
      4
      5
      6
      1
      2
      3
      4
      5
      6
      Requirements analysis and technical consulting
      We conduct a strategic session to understand goals, processes, and technical constraints. Identify automation and integration points. Evaluate which .NET solutions best fit your infrastructure. Define roadmap, functional requirements, and a business-aligned technical specification.
      Time to deliver
      ~ 1-2 days
      Architecture and UI/UX design
      Design scalable architecture using ASP.NET Core, modular structure, and microservices when required. Define access levels and system roles. Create UI/UX prototypes aligned with user workflows. Validate visuals and logic based on feedback.
      Time to deliver
      ~ 2-4 days
      Backend development and business logic
      Implement core modules: user dashboards, admin panels, CRM features. Build business logic: data processing, calculations, API integrations. Use C#, Entity Framework, SQL Server, and other .NET technologies. Configure security, authentication, and validation. Deploy to test environment.
      Time to deliver
      ~ 3-7 days
      System integrations and APIs
      Integrate with ERP, CRM, accounting, logistics, and third-party services. Configure real-time data exchange via APIs. Prepare internal and external API documentation. Ensure communication security and stability. Test all integration scenarios and failure cases.
      Time to deliver
      ~ 5-15 days
      Testing and production launch
      Perform manual and automated testing. Validate security, load handling, UX, and requirements compliance. Fix issues and optimize performance. Configure DevOps processes: CI/CD, containers, monitoring. Launch to production.
      Time to deliver
      ~ 2-4 days
      Support, optimization, and growth
      Provide ongoing support and regular updates. Extend functionality as business grows. Add new modules, APIs, and integrations. Ensure uptime, backups, and monitoring. Support scaling and future expansion.
      Time to deliver
      ~ 1-2 days

      Technologies and tools we use

      java photo
      Java
      Javascript
      Javascript
      MySQL
      PHP photo
      PHP
      java photo
      Java
      Javascript
      Javascript
      MySQL
      PHP photo
      PHP

      FAQ

      We build from scratch and also improve, migrate, and scale existing .NET systems.

      Yes. We integrate legacy components, migrate data, and configure interoperability.

      From 6–12 weeks for an MVP, up to 3–6 months for enterprise-level systems.

      Have an idea but not sure how to implement it in .NET?

      We’ll help you define the right architecture and tech stack for your goals

        Chat with manager