ASP.NET Core APIs
Minimal APIs or controllers with OpenAPI documentation, versioning, rate limiting and sign-in through Microsoft Entra ID or your own identity provider.
Hire C# and .NET developers · UK
Hire C# and .NET Developers in the UK
C# developers who ship ASP.NET Core features for your roadmap and move ageing .NET Framework applications onto modern .NET, one project at a time.
- Senior engineers who ship production code
- Hourly, dedicated or managed delivery
- You interview before anyone starts
C# and .NET expertise
C# and .NET expertise our developers bring.
At home in modern .NET, and unfazed by the Web Forms, WCF and .NET Framework 4.x code that still runs many UK line-of-business systems.
Blazor web apps
Interactive UIs written in C#, with server, WebAssembly or static rendering chosen per page — a strong fit for internal tools built by a .NET team.
Entity Framework Core
Clean models and migrations, plus the unglamorous fixes — N+1 queries, missing indexes, needless change tracking — that make a slow EF app quick again.
.NET Framework to modern .NET
Incremental migrations that route pages to ASP.NET Core through a YARP proxy, so old and new run side by side until the last route has moved.
Azure-hosted applications
If you are on Azure: App Service, Functions, Azure SQL, Service Bus and Key Vault, defined as infrastructure as code. On AWS or containers, the .NET work is the same.
Microsoft 365 and Dynamics
Microsoft Graph for Outlook, Teams and SharePoint, and the Dataverse and Business Central APIs for Dynamics 365, syncing customers, cases and documents.
What they build
What C# and .NET developers can build for you.
Typical .NET work for UK teams, from customer-facing APIs to the internal systems finance and operations staff use all day.
Line-of-business web apps
Case management, approvals, scheduling and reporting in ASP.NET Core or Blazor, with the role-based access and audit history operations teams rely on.
Windows desktop modernisation
Move WinForms and WPF apps onto modern .NET so they keep receiving fixes — or replace the screens people use most with a web front end.
Teams and Outlook add-ons
Teams apps, Outlook add-ins and background syncs backed by Microsoft Graph, so work gets done in the tools staff already have open.
Dynamics 365 integrations
Keep accounts, orders and cases in step between Dynamics 365 and your website, ERP or finance package, with retries and a log of every change.
Multi-tenant SaaS back ends
Tenant isolation, subscriptions, background jobs and public APIs on ASP.NET Core, ready to host on Azure, AWS or plain containers.
WCF and Web Forms retirement
Replace WCF services with REST or gRPC — or CoreWCF where clients cannot change — and rebuild Web Forms pages in Razor Pages or Blazor, screen by screen.
Technology stack
Technology stack.
The tools that usually sit around C# and .NET in the projects we join. We fit into your stack — this is where we are most at home.
Core
C# and modern .NETASP.NET CoreBlazorSignalR
Data
Entity Framework CoreDapperSQL Server and Azure SQLPostgreSQL
If you are on Azure
App ServiceAzure FunctionsService BusKey Vault
Microsoft ecosystem
Microsoft GraphEntra IDDynamics 365 and DataversePower Platform connectors
Testing
xUnit and NUnitbUnit for BlazorPlaywrightTestcontainers
Hosting and delivery
Docker and KubernetesAWSGitHub ActionsAzure DevOps Pipelines
Developer seniority
The right level for the work.
Every engagement is staffed with senior engineers. What changes is how much architecture and leadership the work needs around them.
Senior C# and .NET developer
Takes features from ticket to reviewed, tested, deployed code without hand-holding. The right choice for most roadmap work.
Lead engineer or architect
Sets the C# and .NET architecture, reviews the team's code and plans migrations, upgrades and scaling work.
A small blended pod
A C# and .NET developer with backend, QA or design support, coordinated by one delivery owner for larger scopes.
Engagement models
Ways to hire C# and .NET developers.
Pay by the hour for bursts of work, reserve a dedicated developer for your roadmap, or hand us the whole project.
Hourly C# and .NET developer
From £23 per hour
Backlog work, fixes, integrations, and flexible sprint support
- Weekly billing, daily written updates, code review, and no long-term lock-in.
Dedicated C# and .NET developer
From £3,300 per month
Ongoing delivery, product teams, and roadmap acceleration
- A named engineer embedded into your workflow with weekly demos and delivery planning.
Managed C# and .NET project
Fixed quote
MVPs, rebuilds, dashboards, SaaS platforms, and business-critical launches
- Discovery, architecture, development, QA, deployment, and post-launch support.
Prices are in GBP. Every estimate is confirmed in writing after a discovery call — the figures above are where engagements start, not a quote.
How hiring works
From brief to first commit.
The goal is not just to introduce a C# and .NET developer — it is to make the first week useful and the work visible from then on.
- 01
Discovery and fit check
We review your C# and .NET goals, current stack, deadlines, risks, and success metrics before suggesting an engagement model.
Role and success criteria agreed
- 02
Shortlist in 24 hours
You get a clear C# and .NET developer profile, relevant experience, availability, and estimated weekly capacity.
Developer profiles to review
- 03
Kick-off within days
We agree priorities, access, communication rhythm, delivery milestones, and code review expectations. Most engagements start within 5–7 working days of sign-off.
Access, rituals and first tickets
- 04
Ship with weekly demos
Every week you see working C# and .NET progress, blockers, next steps, and measurable delivery against the plan.
Visible progress every week
Why Techsleight
Why hire through Techsleight.
What you can hold us to — and what happens if something is not working.
You choose who joins
You see profiles and talk to the C# and .NET developer before anything starts, and nobody joins your team without your say-so.
Senior, production engineers
People who have shipped and supported real products — reviewed for code quality, testing habits and communication, not just a CV.
They work your way
Your repositories, tickets, stand-ups and review rules. Daily written updates and a weekly demo keep the work visible.
No lock-in
Hourly, dedicated or project-based, with short notice periods. Scale up for a launch and back down after it.
You own the code
Code, IP and documentation belong to you from day one. NDA before any detailed conversation, if you need one.
UK-focused delivery
UK business hours, GBP pricing and a contract with a UK company. Our engineers are based in the UK and India.
A whole team behind one hire
Backend, QA, DevOps and design colleagues are there when the C# and .NET work needs them — without you hiring for each role.
Relevant work
Related product work.
We do not have a published C# and .NET case study yet — these show the kind of product work our engineers join.
All case studiesEducation · SaaS
University Management
University management system replacing spreadsheet enrolment and timetabling.
ReactNode.jsPostgreSQLAWS
Read the case studyTravel · Platform
Travel Ecosystem
Travel platform bringing flights, hotels, itineraries and loyalty together.
Next.jsNode.jsPostgreSQLStripe
Read the case studyLegal · SaaS
CO-LAW Group
Client intake, risk checks and document workflows for a boutique law firm.
Next.jsPostgreSQLAWSStripe
Read the case studyFAQs
Questions we get asked.
Straight answers on scope, cost, timelines and how we work. If yours is not here, ask us directly.
Can you migrate our .NET Framework application to modern .NET?
Yes. .NET Framework 4.8 still receives security fixes through Windows, but no new features, and new libraries increasingly target modern .NET only. We assess each project — class libraries often move quickly, Web Forms and WCF need real rework — then migrate incrementally, routing traffic between old and new so releases carry on.
Which .NET version should we be on?
For new work, the current long-term support (LTS) release of .NET. Every .NET version has a published end-of-support date, so if you are on an older release, plan the move before yours arrives. Moving between modern .NET versions is usually modest; leaving .NET Framework is the bigger project.
Do we have to use Azure to run .NET?
No. Modern .NET runs on Linux, in Docker containers and on AWS as well as Azure. If you already run Microsoft 365 and Azure, staying there can simplify sign-in and billing; if not, we choose hosting on cost and your team’s skills rather than habit.
Should we build our front end in Blazor or JavaScript?
Blazor suits internal tools and admin apps maintained by a C# team: one language, shared models and shared validation. For public, high-traffic sites or a product with an established JavaScript team, React or Angular in front of an ASP.NET Core API is usually the better fit. We recommend based on who will maintain it.
How much does it cost to hire a C# and .NET developer in the United Kingdom?
C# and .NET developer rates at Techsleight Labs start from £23/hour for flexible work and from £3,300/month for dedicated monthly capacity. Fixed-price C# and .NET projects are quoted after discovery, once scope, integrations, risks, and timeline are clear.
How quickly can a C# and .NET developer start?
Most C# and .NET engagements start within 5–7 working days of sign-off, and urgent work can sometimes start within 48–72 hours. For larger projects, we first confirm scope, architecture, milestones, and the right senior engineer fit before kickoff. We support UK teams with written updates, planned demos, and timezone-aware handover.
Can I hire one C# and .NET developer or a full team?
Yes. You can hire a single C# and .NET developer, add a small pod with QA and DevOps, or ask us to manage the complete project. We match the model to your current team, delivery pressure, and budget.
Are your C# and .NET developers senior?
Yes. Our hiring pages are built around senior production engineers, not junior bench resources. Every developer is reviewed for commercial project experience, communication quality, code quality, testing habits, and ability to work inside existing teams.
Do you work with existing C# and .NET codebases?
Yes. We often join existing C# and .NET projects to fix performance, unblock releases, add features, improve test coverage, or modernise architecture. We start with a codebase review so the first sprint is practical rather than theoretical.
What happens if the C# and .NET developer is not the right fit?
Tell us early. We will look at the cause with you — the brief, the onboarding or the match — and agree the next step together, such as more technical oversight, a different engagement model, or ending the engagement on the notice terms in your contract. The goal is a useful working relationship, not lock-in.
Hire developers
Ready to hire C# and .NET developers?
Tell us about the role — the codebase, the work and when you need someone. We will reply within one working day with next steps and suitable profiles.
What happens next
- 1A senior engineer reads your brief within one working day, and replies with questions or a first view.
- 2A 30-minute call to understand the goal, constraints and what good looks like — no sales script.
- 3A written proposal with scope, milestones, team and a GBP estimate you can take to your board.
Techsleight Labs is a trading name of Krapton IT Consultancy.
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