.NET development for
backends that have to be right.
.NET is our first choice when the business logic is complex and correctness is not negotiable. We build high-throughput APIs, enterprise system backends with real financial and compliance rules, and .NET Framework to .NET 9 migrations. C#'s type system catches a whole category of bug before it ever reaches production.
.NET for enterprise-grade backends that have to be right
.NET's combination of static typing, high performance, and mature enterprise tooling makes it the right choice when the business logic is complex and correctness is non-negotiable.
REST & GraphQL APIs
High-throughput APIs serving web and mobile frontends. ASP.NET Core's performance benchmarks put it consistently among the fastest web frameworks, and that is measured, not a marketing claim.
Enterprise System Backends
Complex business logic for operations-heavy businesses: financial calculations, multi-step workflows, compliance requirements. E2P+SEND, the UK schools assessment and SEND platform we built on .NET and MSSQL, reached 352 schools and roughly 700,000 users on the system.
Microservices Architecture
.NET microservices with gRPC communication, message queues (RabbitMQ, Azure Service Bus), and Docker-based deployment. We've migrated monolithic .NET apps to microservices without downtime.
Legacy .NET Migration
Migrating from .NET Framework to .NET 8/9, unlocking cross-platform deployment, better performance, and modern C# features while keeping existing business logic intact.
When the backend has to handle complexity at scale
.NET isn't the flashiest choice, but for enterprise applications where correctness, performance, and long-term maintainability matter, it's hard to beat the combination of C#, Entity Framework, and ASP.NET Core.
Performance that scales
ASP.NET Core is one of the fastest web frameworks available. TechEmpower benchmarks consistently put it at the top. For high-traffic APIs, this isn't theoretical: it reduces infrastructure cost at scale.
C# catches bugs before production
C#'s strong static typing, nullable reference types, and pattern matching catch an entire category of bugs at compile time. For complex business logic with many edge cases, this matters more than developer velocity.
Entity Framework Core is mature
EF Core handles complex queries, migrations, and relationships cleanly. For enterprise data models with dozens of tables and complex relationships, it's the most productive ORM available.
Cross-platform now
Modern .NET runs on Linux, macOS, and Windows. Docker containers, AWS, Azure, GCP: it deploys anywhere. The days of .NET being a Windows-only choice are long over.
When should you choose .NET?
.NET isn't the flashiest choice, but it earns its place on the right kind of backend.
.NET makes sense when
- Business logic is complex and correctness is non-negotiable
- You need high-traffic, high-performance enterprise APIs
- Your team values static typing and compile-time safety
Consider alternatives when
- You need I/O-heavy APIs or real-time features better suited to Node.js
- Your team is a unified JavaScript/TypeScript team
- The project is a small MVP where developer velocity matters more than long-term scale
Hire a .NET Developer
Skip the full build. Get a vetted .NET developer working inside your existing team, on your stand-ups and your roadmap.
Hire a .NET Developer →
Built by AI-native engineers, so your .NET backend is ready for agents and LLM features
We design the API contracts, auth, and event model so AI agents and language-model features can call into your .NET services safely later, rather than retrofitting them. It is how our own products, Tully AI and Mebag, were built.
Strongly typed contracts, scoped tokens, and predictable problem-details errors so an agent can call your API without surprises.
Retrieval endpoints and change-feed streams that keep a vector store current without a nightly export job.
A managed .NET layer in front of OpenAI, Anthropic, or Gemini with rate limits, caching, and fallbacks.
Shipped with prompt versioning, evals, and guardrails. See how we build AI →
Common questions about .NET development
Straight answers on stack fit, working in your codebase, cost, and how we start.
Do you build custom .NET applications, or can we hire a .NET developer to join our existing team?
Both. Most engagements are a fixed-price custom build. If you already have a team and just need backend capacity, we also place vetted .NET developers who work inside your workflow, on your tools and your stand-ups, while we handle employment and payroll.
How much does .NET development cost?
We work fixed-price, not hourly. You get a fixed number and a fixed timeline before any code is written. The figure depends on domain complexity; a focused API for one product is very different from a multi-service enterprise backend with data migrations. See our pricing page for how we structure engagements, or book a call for a real number.
How experienced is your team with .NET specifically?
We have been writing .NET in production for 8 years, across 600+ shipped projects. E2P+SEND, the UK early-years-to-primary assessment and SEND platform, was built on .NET and MSSQL and reached 352 schools with roughly 700,000 people on the system.
.NET vs Node.js: which should I choose for my backend?
.NET for complex business logic, high-traffic enterprise APIs, and teams that value static typing and compile-time safety. Node.js for I/O-heavy APIs, real-time applications, and JavaScript teams that want a unified stack. We use both and will recommend based on your specific requirements.
Do you work with .NET 9 and modern C#?
Yes. .NET 9 and C# 13 for new projects, with ASP.NET Core, Entity Framework Core, and minimal APIs or controllers depending on the service. For existing systems we work with whatever version is live and plan an upgrade path where it adds value. Migrating .NET Framework 4.x applications to modern .NET without service interruptions is a common engagement.
Is .NET still a good choice in 2026?
For enterprise backends where correctness, performance, and long-term maintainability matter, yes. ASP.NET Core is among the fastest web frameworks measured, and the C# type system catches a whole category of bug at compile time. Where it is not the best fit: a small MVP where developer velocity beats long-term scale, an I/O-heavy real-time API better suited to Node.js, or a team that is unified on JavaScript and TypeScript with no reason to add another runtime.
Can you integrate with an existing .NET codebase?
Yes. We start with an architecture review before making any changes: understanding the patterns, dependencies, and technical debt. Then we agree on an approach before extending or refactoring.
What does the process look like?
A 30-minute scoping call, then a fixed-price, fixed-timeline proposal within 48 hours. A focused .NET API for one product typically runs 12 to 20 weeks; a complex enterprise backend with multiple service boundaries, integrations, and data migrations, 24 to 40 weeks.
Do you sign an NDA before we talk details?
Yes. We can have an NDA in place before the first call. Just ask and we will send one over.
Hire .NET Developers
Need .NET engineers embedded in your team rather than a full project handoff? Our .NET Developers join your existing workflow (your tools, your stand-ups, your roadmap) while we handle employment, payroll, and HR. Add one developer or a full team, scale up before a release and back down after, and keep everything they build.
Need a .NET development team?
Enterprise APIs built to last.
Complex backends, enterprise migrations, high-traffic APIs. Tell us what you're building. We've been writing .NET in production for 8 years.