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Hire C# / .NET Developers

Kultrix C# and .NET developers build robust enterprise web applications, APIs, and desktop software that scale under real-world load.

Start in 1-2 Weeks

Start in 1-2 Weeks

Senior Engineers Only

Senior Engineers Only

7+ Years Experience

7+ Years Experience

NDA

NDA

EXPERTISE

Our Tech Stack

C# / .NET 8
ASP.NET Core
Blazor
Entity Framework
Azure
SQL Server

WHAT WE DO

Our C# Developer Expertise

ASP.NET Core APIs

ASP.NET Core APIs

We design and build RESTful and gRPC APIs with ASP.NET Core, following clean-architecture principles, proper versioning, and OpenAPI documentation so downstream teams integrate without friction.

Blazor Applications

Blazor Applications

We build interactive web UIs using Blazor Server and Blazor WebAssembly, delivering rich single-page experiences without leaving the .NET ecosystem or hiring a separate JavaScript team.

Database Design

Database Design

We model relational data with SQL Server or PostgreSQL, manage migrations through Entity Framework, and tune queries, indexes, and execution plans to keep response times under control at scale.

Azure Cloud Setup

Azure Cloud Setup

We deploy .NET workloads to Azure App Service, Azure Functions, and AKS, configure pipelines in Azure DevOps, and enforce security through Managed Identity and Key Vault.

Legacy Modernisation

Legacy Modernisation

We migrate .NET Framework applications to .NET 8, refactor monoliths into modular services, and introduce dependency injection and unit testing to legacy codebases safely.

Enterprise Connectors

Enterprise Connectors

We connect .NET systems to ERP platforms, payment gateways, and third-party APIs using service clients, message queues, and retry-resilient HTTP patterns with Polly.

WHO THIS IS FOR

Who This Is For

Whether you are a startup or enterprise, we have the right engagement for you.

Startup MVP icon

Startup MVP

Fast-track your MVP with senior talent. Launch on time and within budget.

Existing app upgrade icon

Existing App Upgrade

Improve performance, UX, and features of your existing product with expert help.

Scale up delivery icon

Scale Up Delivery

Augment your team with senior specialists to accelerate feature delivery.

OUR APPROACH

Flexible Engagement Models

Choose the cooperation format that best fits your business goals and development velocity.

Startups

MVP Development

Fast launch to test your idea and gather user feedback with minimal investment.

What's included

  • Core feature development
  • Basic UI/UX design
  • Stable performance

Timeline Typically 9-16 weeks

Businesses

Full App Build

Complete cycle from initial strategy and design to final launch.

What's included

  • Custom architecture & design
  • Seamless team integration
  • Production-ready release

Timeline Typically 20-40 weeks

Enterprises

Team Extension

Scale your team with expert developers to accelerate development.

What's included

  • Senior-level developers
  • Seamless team integration
  • Flexible management

Timeline Flexible / Long-term

OUR HIRING PROCESS

How To Hire Our Developers

Share Your Vision

01

Tell us about your project goals, timeline, and team needs. We'll set up a free consultation to dive deeper into your requirements.

We'll Guide You

02

Based on your project, we recommend the ideal team structure, engagement model, and technology approach - tailored to your goals and budget.

Meet Your Future Team

03

We handpick the best-fit professionals from our senior talent pool. You'll meet them, review their experience, and give the green light.

Let's Get Started

04

Your team onboards within 48 hours. We align on workflows, set up communication, and start delivering results from week one.

We Grow With You

05

As your project evolves, we scale your team, add new specialists, or adjust scope - all within your existing partnership.

INDUSTRIES

Industries We Support

Our C# Developer professionals build solutions across various sectors.

(01)

Fintech

Data-driven commerce solutions that improve journeys, boost sales, and optimize operations.

Fintech industry icon
(02)

Retail

Data-driven commerce solutions that improve journeys, increase sales, and optimize operations.

Retail industry icon
(03)

Healthcare

Reliable medical platforms that protect patient data, simplify workflows, and support clinical accuracy.

Healthcare industry icon
(04)

B2B SaaS

Product-driven platforms that enhance workflows, automate processes, and scale with your business.

B2B SaaS industry icon
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Ready to hire a C# Developer?

Expert professionals ready to join your team and deliver results.

CASE STUDIES

Our Recent Work

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Testimonials

What Our Clients Say

What impressed us most was how Kultrix handled the full stack - frontend, backend, and mobile - with one cohesive team. Communication was clear, delivery was predictable, and the final product exceeded what we initially scoped.

Frank W.

Co-CEO

Kultrix built both our web platform and mobile app from scratch. Their team understood the complexity of our industrial workflows and translated them into clean, intuitive interfaces. We launched on time and our operators adopted the tools immediately.

Dinant V.

Co-CEO

Kultrix handled everything for us - landing page, dashboard, mobile app, and even a Chrome extension. Having one team own the entire product surface meant everything felt connected and consistent. They shipped fast and the quality speaks for itself.

Timur G.

CEO, Ping Proxies

Kultrix has been our go-to partner for multiple projects - from marketing websites to full mobile applications and backend systems. They scale up when we need speed and maintain consistency across every project. Reliable, fast, and technically strong.

Musa S.

CEO, Volume Apps

Working with Kultrix on our mobile app and backend was seamless. They brought strong product thinking to every sprint, not just code. When priorities shifted, they adapted quickly without losing momentum. Exactly the kind of partner a product team needs.

Taj S.

Product Lead, Pelago

We needed a team that could handle mobile development, server infrastructure, and AI features all at once. Kultrix delivered on all three fronts. Our fitness platform went from concept to production in under four months with zero compromises on quality.

Laurent D.

CEO, Fitblast

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FAQ

Frequently Asked Questions

C# is the programming language; .NET is the runtime and framework ecosystem. In practice, the terms are used interchangeably - all Kultrix .NET developers write C# and work across the full .NET stack including ASP.NET Core, Entity Framework, and the Azure SDK. When we say C# developer, we mean someone fluent in the complete Microsoft backend platform.

Most Kultrix engagements begin within 48 hours of contract signing. We maintain a bench of vetted senior .NET developers available for immediate placement. For larger teams or highly specialised requirements such as Blazor or Azure Service Fabric, a one-week lead time is typical.

Yes - joining a live codebase is standard practice for Kultrix developers. They begin with a code review, map dependencies, identify technical debt, and align with your architecture before writing their first PR. Productive contribution typically begins within the first sprint.

Absolutely. We have completed multiple .NET Framework to .NET 8 migrations, including projects using Web Forms, WCF, and ASMX web services. We assess compatibility, prioritise the migration path, automate what can be automated, and rewrite what cannot be safely ported. Migrations are done incrementally to minimise delivery risk.

Our .NET developers are fluent across Azure App Service, Azure Functions, Azure Service Bus, Azure SQL, Cosmos DB, Blob Storage, AKS, and Azure DevOps pipelines. We apply Managed Identity throughout to eliminate hard-coded secrets, and use Key Vault for configuration management.

Testing is not optional at Kultrix. Our developers write xUnit tests for business logic, use Moq or NSubstitute for mocking, and set up integration tests against a real database using TestContainers. Coverage gates are configured in CI so regressions are caught before they reach production.

Yes. Fixed-scope engagements such as building an API, migrating a database, or implementing a payment integration are scoped after a discovery call and quoted with a fixed price and timeline. Changes are handled through a straightforward change-order process that keeps delivery on track.

All Kultrix .NET developers are mid-to-senior level with a minimum of four years of professional C# experience. Every developer passes a technical interview covering OOP design, async patterns, and SQL before joining our bench. We do not place juniors on client engagements.

We offer monthly retainer and time-and-materials models. Retainer engagements include a fixed allocation of developer hours with a guaranteed response SLA. T&M engagements are billed weekly against tracked hours. Both models include transparent timesheets and a dedicated account manager.

Yes. Kultrix developers structure .NET projects using clean or onion architecture, separating domain, application, infrastructure, and presentation concerns. This makes the codebase easier to test, easier to extend, and easier for new team members to navigate from day one.

Yes. We have experience with both Blazor Server and Blazor WebAssembly, including authentication with MSAL, state management with Fluxor, and publishing optimised WASM bundles. If your team wants to avoid a JavaScript frontend while keeping rich interactivity, Blazor WebAssembly is a strong choice and we can lead that implementation.

Kultrix is a product-focused agency, not a talent marketplace. Every developer is a Kultrix employee or long-term contractor - not an anonymous profile. We manage quality, handle replacements if a fit is not working, and provide a dedicated account manager. You get the flexibility of a freelancer with the accountability of an agency.