Multi-layer Caching with the Decorator Pattern
Databricks SQL cold starts kill web API performance. Fix it with two-layer caching: Azure Blob Storage & IMemoryCache, using the Decorator pattern.
App Dev
Struggling to modernise legacy applications or build cloud-native solutions from scratch? Our development expertise in .NET, Azure, and DevOps accelerates your delivery and de-risks your journey.
Talk to our .NET expertsWhat we do
Struggling to modernise apps or build cloud-native solutions from scratch? Our development expertise in .NET, Python, TypeScript, Azure and DevOps accelerates your delivery.
Discovery
Jumpstart your .NET modernisation with our battle-tested process
Proof of Concept
Build the business case by implementing a scenario
Blueprints
De-risk your project and accelerate time to value
Delivery Squads
Team-per-week working to a deadline or budget
DevOps
Streamline delivery with CI/CD, Infrastructure as Code, and automation
App Modernisation
Transform legacy applications into cloud-native .NET solutions
Performance Optimization
Identify and eliminate bottlenecks to maximise application speed and efficiency
Mentoring
Weekly "office hours" to help solve problems & make decisions
Skills Assessment
Understand your capabilities to plan for modernisation success
endjin ♥
Reactive Programming
In the Cloud Native era, apps are complex, interconnected & data driven. Reactive programming is a useful paradigm for any system that has to deal with things happening, and solves the problem of extracting intelligent signals from the noise of modern data volumes.
Reactive Extensions for .NET was created in 2008 by the Cloud Programmability team at Microsoft, for a Cloud Native future, which has now arrived
The System.Reactive NuGet package has been downloaded over 150 million times, and is used by Visual Studio, .NET Interactive and ReactiveUI.
Since 2023, the Open Source project has been maintained by endjin.
Reactive programming provides clarity when our code needs to respond to events. The Rx.NET libraries were designed to enable cloud-native applications to process live data in reliable, predictable ways.
We've written a FREE book which explains the vital abstractions that underpin Rx, and shows how to exploit the powerful and extensive functionality built into the Rx.NET libraries.
Reaqtor evolves Rx.NET by adding state & durability primitives to enable long running queries, for processing live or historic data streams. Reaqtor is used by Bing, MSN, and M365 to handle billions of standing stateful queries, processing thousands of events per second.
We spent 5 years collaborating with Microsoft to Open Source Reaqtor under the .NET Foundation and become the project maintainers.
Reactive Extensions for .NET talks
Watch our talks on Reactive Extensions for .NET, from modernization and new features to high-performance event processing with Reaqtor.
Watch on YouTube.NET Learning Paths
Curated series covering the patterns, performance techniques, language features, and data modelling every .NET developer should know.
All .NET posts
High-Performance .NET
Memory allocation strategies, Span<T>, and performance optimisation techniques for .NET.
Modern C# Language Features
Nullable references, pattern matching, and the latest C# 11–12 language features every .NET developer should know.
Modern Compute
A three-part exploration of modern CPU architectures — from post-AI hardware shifts to compute-intensive workload strategies.
Json Schema Patterns in .NET
A seventeen-part guide to data modelling with JSON Schema in .NET — from basic objects to polymorphism and pattern matching.
AIS.NET Performance
High-performance AIS message parsing in C# — and how each .NET release from 6.0 to 10.0 improved it for free.
C# Nullable References
A sixteen-part deep dive into C# nullable reference types — from the new default to advanced nullability attributes and generics.
Design Patterns in C#
A seven-part guide to classic design patterns — Factory, Adapter, Builder, Composite, Decorator, Facade, and Proxy — implemented in C#.
Reactive Extensions (Rx.NET)
From first subscription to advanced operators — mastering reactive programming with Rx.NET.
ASP.NET Core Fundamentals
Authentication, DI, middleware, and service lifetimes — the essentials of ASP.NET Core development.
.NET & C# talks
Watch our talks on .NET development, C# language features, and high-performance coding techniques.
Watch on YouTubeLatest App Dev blogs
LINQ Max and nullable value types
LINQ's projecting Max operator has a trap for the unwary when used with value types. Understand what goes wrong, and how to avoid it.
Integration Testing Azure Functions Part 5: Reqnroll in Build Pipeline
Integration testing Azure Functions with Reqnroll and C#. Part 5 covers running your Corvus.Testing specs in Azure DevOps and GitHub Actions pipelines.
Integration Testing Azure Functions Part 4: Reqnroll Configuration
Integration testing Azure Functions with Reqnroll and C#. Part 4 shows how to supply or override configuration values for the functions apps under test.
Integration Testing Azure Functions Part 3: Reqnroll hooks
Integration testing Azure Functions with Reqnroll and C#. Part 3 uses scenario and feature hooks to start functions apps and keep your BDD specs readable.
Integration Testing Azure Functions Part 2: Reqnroll step bindings
Integration testing Azure Functions with Reqnroll and C#. Part 2 uses Corvus.Testing step bindings to start and stop functions apps in your scenarios.
We share the value we create.
We help our customers succeed by leveraging our Intellectual Property.
"Past Us" created value so that "Future Us" could benefit, and work smarter; constantly focusing on delivering real business value rather than reinventing the wheel, to scratch a technical itch. You can benefit from our efforts too.
Endjin on GitHubGitHub Repos
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From SMEs to global enterprises, we help organisations build modern, cloud-native applications with .NET and Azure.
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