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Senior Solution Architect C#/.NET, React, Microservices & Cloud Modernization (O...
Posted 3 days ago by ERPMark Inc
Job OverviewWe are seeking an experienced Solution Architect with strong expertise in C#, .NET, React, Microservices, Cl...
- Rate Not specified
- Category Not specified
- Work type Not specified
- Location United Kingdom
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Senior Fullstack Developer (C#, AWS, Angular)
Posted 1 week ago by Precision System Design Inc.
Precision is seeking a Senior Full Stack Developer for a contract position supporting our Fortune 100 client.This fully...
- Rate Not specified
- Category Outside
- Work type Remote
- Location Remote or Hybrid in Cleveland, Ohio
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Senior Software Engineer (C#, Python or Java) - FTE Conversion
Posted 1 week ago by Javen Technologies, Inc
Title: Senior Software Engineer (C#, Python or Java)Location: RemoteDuration: Full-Time Employment ConversionAt Solventu...
- Rate Not specified
- Category Not specified
- Work type Remote
- Location Remote
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Senior Fullstack Developer (C#, AWS, Angular)
Posted 2 weeks ago by Precision System Design Inc.
Our Fortune 100 direct client is hiring for a talented Fullstack Developer with strong experience working with AWS servi...
- Rate Not specified
- Category Outside
- Work type Remote
- Location Remote or Hybrid in Cleveland, Ohio
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AI Engineers (x2) - Microsoft Foundry Agentic AI C#
Posted 2 weeks ago by Method-Resourcing
Key ResponsibilitiesDesign, build and deploy AI agents using Microsoft Foundry Agent Service or equivalent frameworks.Co...
- Rate Not specified
- Category Not specified
- Work type Remote
- Location London; City of London; East London; Central London; South East London; West London; Canary Wharf; South West London; North London; Greenwich; Stratford
C# Developer Contract Rates in Cardiff: Day Rate Quartiles and Demand
Live market telemetry, compensation quartiles, and IR35 compliance benchmarks across the UK contract sector.
Median Daily Rate
£450/day
in line with national baselines
Interquartile Range
£360/day – £600/day
Middle 50% market distribution
Contract Engagement Split
55% Outside IR35
5% Inside IR35 engagements
Market Conditions and Compensation Trajectory
Operating as an independent C# Developer contractor in Cardiff offers distinct regional financial advantages, effectively balancing competitive local compensation against lower regional operational overheads. Aggregated telemetry across Cardiff records a regional median compensation benchmark of £450/day, registering a 0.0% variance against the broader UK contracting standard. Remuneration boundaries across active placements establish an interquartile band from £360/day to £600/day across 928 local C# Developer vacancies to November 2026. Statutory compliance data indicates that 55% of active Cardiff assignments operate under verified outside-IR35 determinations.
Daily Rate Quartiles and Market Benchmarks
Day rates come from the Quality Contracts market benchmark dataset of UK contract postings; IR35 outcomes and sector labels come from vacancies matching this hub. Quartiles use priced roles only.
| Metric | Value | What it shows |
|---|---|---|
| Median day rate | £450/day | Mid-market advertised pay for this hub |
| 25th percentile (P25) | £360/day | Lower-quartile priced vacancies |
| 75th percentile (P75) | £600/day | Upper-quartile priced vacancies |
| Outside IR35 share | 55% | Stated limited-company / outside SDS |
| Inside IR35 share | 5% | Stated PAYE / umbrella / inside SDS |
| Undetermined IR35 | 40% | Adverts that omit a published status |
| Leading sector | IT (95%) | Largest hiring cluster in the sample |
| Priced sample | 928 roles | Postings with a stated day rate in the benchmark dataset |
| Regional rate band | a regional rate discount versus London | Location pricing context, not an SDS |
Statutory Standards and Frequently Asked Questions
Cardiff does not create a special IR35 code for C# Developer work. The client SDS should name the Cardiff workplace and delivery model. An inside finding on a Cardiff C# Developer brief typically deducts tax at source, while outside IR35 C# Developer work in Cardiff is billed by a PSC. Local pay sits on a regional rate discount versus London, so a higher Cardiff headline rate can still be inside. Commuting into Cardiff does not, by itself, prove substitution or lack of control. Read the C# Developer Cardiff contract for workplace, hours, and equipment clauses.
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