~/ fusor/ architecture.svg net10.0 · live
ONLINE · 99.97 % UPTIME

Business applications
engineered as
systems.

.NET 10 / C# 12 stack, layered architecture, native observability. Spec, fixed price, delivered.

17 yrs
IN BUSINESS
87.4 %
CODE COVERAGE
<200 ms
P95 LATENCY
fusor.architecture · runtime view live
arch · prod · eu-west · v2026.04 built with .NET 10 · C# 12
── stat_01
17
years in prod
founded in 2009
── stat_02
99.97%
average uptime
contractual SLA
── stat_03
87.4%
code coverage
xUnit + Coverlet
── stat_04
<200ms
p95 API latency
monitored 24/7
// Architecture.cs
5 layers

// Layered architecture — testable, built to evolve.

── CLIENT
Blazor · MAUI · Web
SPA / SSR PWA
L1
── EDGE
API Gateway · Auth
ASP.NET Core OAuth2 / OIDC SSO / SAML
L2
── AI
Claude
Agents API
L3
── DATA
Persistence
EF Core 10 SQL Server MariaDB
L4
── OPS
Observability
Serilog Grafana Prometheus
L5
// Features.cs
6 items

// What keeps you clear of nasty surprises.

FIXED_PRICE

Fixed price, from the quote

No hourly billing, no project-management fees. The spec sets the price. Full stop.

Assert.Equal(0,
  budget.Overrun); // SLA
PIPELINE

Industrialized pipeline

Intake → spec → design → sprints → QA → prod. Every stage is tooled so our devs write code, not slides.

foreach (var s in Stages)
  await s.AutomateAsync();
CI_CD

Continuous integration

Automated builds, tests on every commit, a preview environment for each feature. You follow progress live.

[Trigger(OnPush)]
await CI.RunAsync();
UX

User logic first

Business tools are used 8 hours a day. Usability isn't a bonus — it's a KPI.

var ux = await UserTest.RunAsync();
Assert.True(ux.Friction < 0.1);
SCALE

Applications that scale

Modular architecture. New features, new modules, third-party integrations — without starting from scratch.

services.AddModule<NewFeature>();
// v2, v3, v…
OWNER

A single point of contact

One dedicated contact from discovery to production. No game of telephone across 4 project managers.

public record Contact(
  Human Person // 1
);
// SAMPLE_CODE

Code we stand behind.

CQRS with MediatR, declarative validation, transactions per scope, observability built in. Readable at the next review, testable at the next commit.

100% async/await
Nullable reference types enabled
Analyzers + style cop in CI
No magic strings, everything typed
Application/Quotes/CreateQuoteHandler.cs C# 12
// CQRS handler — testable, transactional, observable
public sealed record CreateQuote(Guid ClientId, Brief Brief)
  : IRequest<QuoteId>;

public sealed class Handler(AppDb db, IClock clock)
  : IRequestHandler<CreateQuote, QuoteId>
{
  public async Task<QuoteId> Handle(
    CreateQuote cmd, CancellationToken ct)
  {
    var quote = Quote.Draft(cmd.ClientId, cmd.Brief, clock.Now);
    quote.Price(Pricing.FixedFor(cmd.Brief));

    db.Quotes.Add(quote);
    await db.SaveChangesAsync(ct);

    return quote.Id;
  }
}
// Pipeline.cs

// From idea to production, in the clear.

01
──── INTAKE
Specification
Scoping workshop. We formalize the need with you, even when it isn't written down.
⧗ 1–2 wks
02
──── SPEC
Mockups & fixed quote
Interactive wireframes, technical architecture, final price. Signed, we start.
⧗ 2 wks
03
──── BUILD
Development in sprints
A preview environment every sprint. You test continuously, not at the end.
⧗ 2–4 mo
04
──── SHIP
Integration & go-live
Deployment on your infrastructure or ours. Team training. Documentation.
⧗ 1–2 wks
05
──── EVOLVE
Maintenance & evolutions
You grow, the application follows. Modules, integrations, refactors.
⧗ ongoing
// fusor.csproj

.NET stack, full-stack C#.

One language from backend to frontend: C#. Web (Blazor), desktop, mobile (MAUI), services (ASP.NET Core). Hosting on-premise, private cloud, or Azure — your IT, your rules.

{
"sdk": "net10.0",
"language": "C# 12",
"packages": [
".NET 10" "C# 12" "ASP.NET Core 10" "Blazor Server" "EF Core 10" ".NET MAUI" "SQL Server 2022" "Redis" "Azure" "Docker" "SignalR" "MediatR" "OAuth2 / OIDC" "OpenAPI 3.1" "Serilog" "Polly" "Hangfire" "xUnit"
],
"uptime": 99.97,
"region": "eu-west"
}
// telemetry/live.json
live · refresh 2s

// Observability at runtime, not in the post-mortem.

P50 LATENCY
42 ms
P95 LATENCY
187 ms
P99 LATENCY
412 ms
ERROR RATE
0.04 %
THROUGHPUT
2 410 rps
CPU (AVG)
34 %
source: app-prod-eu-west · last 5 min · sampled $ kubectl logs -f fusor-api
// expertise.cs

// Our method, your values.

├── method/

Pragmatic approach

From your specification, custom business applications at a fixed cost — tailored to your line of work and integrated with your existing systems.

Mockups Development Testing Integration
Fixed cost, delivered
├── stack/

Microsoft & web

Microsoft technologies and web access — your teams work anywhere, on any device, with no heavy install on the user's machine.

ASP.NET Core Blazor Web Multi-device
Anywhere, any device
├── values/

Transparency & usability

A long-term relationship built on trust: you're an active part of your project. The application must serve the people who use it every day — usability is our battleground.

Trust Transparency UX
Long term
$ fusor --init

Ready to launch the build?

Send us your spec (or just an idea on the back of a napkin). You'll get a fixed-price quote within 72 h.