Development

ASP.NET & .NET Development

Robust, secure web applications on ASP.NET and MSSQL — the enterprise-grade stack for platforms that need to be reliable, scalable, and maintainable.

Discuss Your Project See It Live

ASP.NET with MSSQL is the stack of choice when a web application has to be genuinely robust — strong typing, mature tooling, first-class security, and a database engine built for serious transactional workloads. We design, build, and maintain ASP.NET applications: bespoke platforms, business systems, APIs, and integrations, from new builds to extending and fixing existing .NET codebases.

The problem

Many businesses inherit or commission an ASP.NET application and then struggle to find a team that can maintain it well — adding features without breaking things, keeping it secure and patched, tuning MSSQL queries that have slowed down, or untangling code that grew without structure. Others know .NET is the right fit for a reliable, transactional platform but need a team that can build it properly from the start.

How we build it

Whether we are building new or working on your existing codebase, we prioritise structure, security, and maintainability. New builds get a clean architecture, parameterised queries and hardened inputs, sensible separation of concerns, and documentation your team can follow. On existing systems we audit first, then improve incrementally — fixing bugs, tuning slow MSSQL queries, patching security issues, and adding features without destabilising what already works.

What's included

What we build into it

New ASP.NET web applications and platforms, built to last

MSSQL database design, optimisation, and query tuning

REST APIs and third-party integrations

Security hardening — parameterised queries, input validation, auth

Maintenance, bug fixing, and feature work on existing .NET codebases

Performance profiling and scaling for growing platforms

Migration and modernisation of legacy .NET applications

Clean, documented, version-controlled handover

Typical tech stack

ASP.NET C# MSSQL Entity Framework REST APIs Azure

Proof — Live Project

We've built this for real, at scale

Bid Specialists runs on ASP.NET and MSSQL — a live, production platform we built with multi-user architecture, Google Places integration, and fast filtered search across a global dataset. It is direct proof of our ASP.NET and SQL Server capability on a complex, real-world system.

Read the Case Study Visit the Live Site

bidspecialists.com

FAQ

Common questions

Can you maintain or fix an existing ASP.NET application we already have?

Yes — this is a common request. We audit the existing codebase and database, then work incrementally: fixing bugs, patching security issues, tuning slow MSSQL queries, and adding features, all without destabilising the parts that work. You do not need the original developers.

Why choose ASP.NET and MSSQL over other stacks?

It is a strong fit when reliability, security, and transactional integrity matter — business platforms, systems handling money or sensitive data, and applications expected to scale. Strong typing and mature tooling also make large codebases easier to maintain safely over time.

Can you optimise a slow MSSQL database?

Yes. Slow queries are one of the most common causes of a sluggish .NET application. We profile the database, identify the expensive queries and missing indexes, and tune them — often a dramatic speed-up without touching the rest of the app.

Related capabilities

Need ASP.NET & .NET Development?

Whether it's a new build, an update, or fixing something that isn't working, tell us what you need and we'll come back with a clear scope and a fixed quote.

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