Work with UK .NET experts trusted by SMEs and blue-chip organisations across finance, healthcare, and enterprise software.
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You have probably used products built by our .NET developers.
Since 1996, SquareCode has delivered .NET software for UK organisations that need reliability, security, and long-term maintainability. Our engineers build platforms that process payments, protect sensitive data, and serve users at scale — from internal enterprise tools to customer-facing applications.
We build enterprise-grade web platforms with ASP.NET Core APIs and modern front-ends. Our APIs run in containers and scale on Azure or AWS, while our teams deliver secure, responsive interfaces designed for performance and accessibility.
Legacy .NET Framework estates can be migrated to modern .NET without halting production. We incrementally port WCF, WebForms, and monolith components so you gain a future-ready codebase and lower infrastructure costs.
We deliver native-performance apps for iOS, Android, Windows, and macOS from a single .NET MAUI codebase — ideal for regulated industries that need encrypted storage, biometric authentication, and offline sync.
Our QA specialists design automated testing suites covering unit, integration, performance, and security testing — so your .NET applications are stable, performant, and ready for production.
We transform operational data into actionable insight using .NET workers, Azure Synapse, and modern data pipelines — with governed ETL, versioned contracts, and dashboards your teams can trust.
We design automated infrastructure for your .NET services on Azure and AWS using Infrastructure as Code and mature CI/CD practices — giving your team a stable, observable platform to build on.
Why technology leaders choose our UK .NET teams
We have built a reputation for delivering compliant, mission-critical .NET solutions at predictable velocity — embedding seamlessly alongside in-house development teams.
Our engineers bring deep experience in distributed systems, high-concurrency patterns, and secure cloud design — contributors who can own complex problems from architecture through delivery.
We staff senior experts quickly so they can understand your domain and codebase and start contributing meaningful value without a long, costly ramp-up.
We have delivered for regulated sectors including healthcare and financial services, with controls aligned to frameworks such as SOC 2, HIPAA, and ISO 27001.
Projects delivered for UK and global organisations.
Consumer Products
Hasbro
We developed a license management system for Hasbro sales managers — a dependable internal platform that needed to integrate cleanly with existing workflows and scale as the business grew.
Technology
Cisco
We integrated wearable devices into Cisco wellness systems — scaling with the product roadmap, maintaining quality under pressure, and becoming an extension of the internal delivery team.
Hospitality & Telecoms
Marriott
SquareCode was founded building call management and tariff switching software for Marriott — the kind of long-running, business-critical .NET platform that still informs how we approach enterprise delivery today.
Our engineers use modern AI coding tools to ship faster while maintaining clean, reviewable code.
The ecosystem we use for .NET projects
Need extra .NET expertise? Plug us in where you need us most.
Add senior, production-ready .NET developers who integrate directly into your team — working your hours, joining your standups, and following your workflows.
Learn moreSpin up focused delivery pods to handle full builds or workstreams, with clear priorities and consistent velocity across your .NET roadmap.
Learn moreHand off the full project lifecycle from planning to deployment. You define the outcomes; we take ownership of execution and keep you informed throughout.
Learn moreOur .NET engineers are senior contributors with extensive production experience in distributed systems, cloud architecture, and enterprise integrations. You work directly with the engineers delivering your project.
Depending on scope and team size, we can typically onboard senior .NET engineers within a few weeks — often faster for staff augmentation engagements where requirements are clear.
Yes. We migrate legacy .NET Framework estates incrementally, keeping production stable while porting modules to modern .NET with comprehensive testing at each stage.
Yes. SquareCode is a UK company with engineers aligned to UK hours — making collaboration, standups, and stakeholder communication straightforward for British organisations.
Yes. We provide dedicated QA teams to augment your staff or build a quality strategy from the ground up, including automated test suites for integration, performance, and security.
