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Inside IR35 Contractor Cardiff

29 jobs found in Cardiff

CL
Apr 12, 2026  
Test Engineer
Test Engineer – Short Term Contract – Fully Remote VIQU have partnered with an NHS organisation who are looking for an experienced Test Engineer to support an ongoing project, working across .NET applications and Power Apps within an Agile delivery environment. This Test Engineer role is ideal for someone who can provide strong hands-on testing coverage in the short term, while taking ownership of building and embedding test automation from scratch using Playwright to improve quality and accelerate delivery. Key responsibilities: Picking up and managing testing tickets via Azure DevOps (ADO) Testing against defined acceptance criteria Manual and regression testing Creating and running test scripts Supporting Agile ceremonies and ways of working Implement a greenfield automation approach: establish frameworks, standards, and automated regression packs using Playwright Key skills & experience: Strong experience as a Test Engineer Hands‑on manual testing and regression...
IR35 Status:
Inside IR35

CV-Library Cardiff, UK Contractor
CL
Apr 12, 2026  
Damp, Mould & Condensation Surveyor
Damp, Mould & Condensation Surveyor – North Somerset – Housing Association £37.33 Umbrella (Inside IR35) / £29 PAYE 37 hours per week Temporary Contract (3 Months) We are currently recruiting for a Damp, Mould & Condensation Surveyor to join a leading Housing Association, delivering a customer-focused surveying service across North Somerset and Bristol. This is a project-focused role where you will take ownership of damp and mould cases from initial inspection through to completion, ensuring works are delivered on time, within budget, and to a high standard. You will work closely with internal teams, contractors, and residents to manage repairs, resolve issues, and maintain excellent service delivery. The role is based out of Portishead, with travel across North Somerset and surrounding areas. Responsibilities Manage damp, mould, and condensation cases from inception to completion Conduct property inspections, identify defects, and diagnose building pathology...
IR35 Status:
Inside IR35

CV-Library Portishead, UK Contractor
CL
Apr 18, 2026  
Technical Administrator
Technical Administrator - 6 month contract - Glascoed, Monmouthshire - £17.87 ph UMB or £13.45 ph PAYE (Inside IR35) The Umbrella rate quoted above is the Gross Umbrella rate (i.e. the rate we pay to the Umbrella Company inclusive of ALL employment costs). Please note, the rate paid by the Umbrella will be less, as will a Limited Deemed rate or Agency PAYE rate. Please get in touch to discuss the rates via these different payment vehicles. The Role Uploads digital files and data. Organizes and archives records and documents. Makes copies of paperwork and distributes as needed. Retrieves data and files for other departments and personnel. Uses alphabetical and numerical systems to organize paper and electronic records documents. Checks paperwork, digital forms, and files, updating or correcting documentation as needed. Updates filing systems and devises new filing and organizational and storage systems for data and documents as needed. Creates new files and provides needed...
IR35 Status:
Inside IR35

CV-Library Usk, Monmouthshire Contractor
CL
Apr 09, 2026  
Aircraft Structural Fitters
MPI are looking for Aircraft Structural Fitters with Composite experience to work on site at Western Approach, Bristol. Contract is for approx. 6 months – and is ongoing/rolling contract Rate of pay - Paye: - INSCOPE OF IR35 £23.59 per hour on shift Weekday overtime - £27.65 Weekend overtime - £36.86 ** Likely be up to a couple of weeks on Core Day Shift Training paid at £18.43/per hour ** Shift Pattern: Currently working 12/7 shift on days, 11.5 hour days average 40.25 hrs per week (known as 7 Day Fort Days) all days start from 6.00am to 6.00pm Week 1 – Mon, Tues, Fri, Sat and Sun. Week 2 Wed, Thursday. Duties: As a Skilled Aircraft Fitter with Composite experience, you will be involved in working on a range of aircraft main wing assemblies and sub-assemblies from detail parts, whilst embracing appropriate assembly techniques, tools and fixtures, in accordance with the appropriate technical data and competencies .Assemble composite and metallic aircraft components in line with...
IR35 Status:
Inside IR35

CV-Library Bristol, City of Bristol Contractor
CL
Apr 18, 2026  
C++ Application Software Engineer
World Class Defence Organisation is currently looking to recruit 3x C++ Application Software Engineer subcontractors on an initial 12 month contract.     This role requires: Strong experience in C++ application development. A strong background in software engineering, its realisation and system wide impact. Experience in CI/CD pipelines, GitLab, Docker. Experience of developing software for virtual environments.  Rate: £65.00 per hour Location: Bristol Hybrid / Remote working: The role will likely be onsite – a compressed 4 day week (Monday to Thursday is fine).  There may be some scope for hybrid working (project dependent). Contract: 37 Hours per week Overtime: Hours worked over 37 hours per week will be calculated at ‘time and a quarter’ Duration: 12 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella)...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Apr 18, 2026  
Embedded Software Engineer
World Class Defence Organisation is currently looking to recruit 2x Embedded Software Engineer subcontractors on an initial 6 month contract.     Rate: £68.00 per hour Location: Bristol Hybrid / Remote working: The role will be onsite – a compressed 4 day week (Monday to Thursday is fine) Contract: 37 Hours per week Overtime: Hours worked over 37 hours per week will be calculated at ‘time and a quarter’ Duration: 6 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella)                                                                                                                                           Interview Process: One stage Video Interview Embedded Software Engineer Job Description: We are a world leader in missile and missile systems, seeking a highly capable and adaptable Embedded Software Engineer to join our Development Facility in Bristol. As part of our growing dynamic Software team, you will develop the latest...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Apr 18, 2026  
Rolling Stock / GU Mechanical Technician
Job title: Rolling Stock / GU Mechanical Technician Job Type: Contract Location: Bristol Duration: 6 month contract | Potential for extension Pay rate: Competitive IR35 Status: Inside IR35 Hours of work: 55 per week | Full Time Shift pattern: Night shifts | Sunday Night to Thursday Night each week Rullion are supporting a leading rolling stock organisation in the search for a Rolling Stock Technician to join their team maintaining a modern Class 800 fleet at Stoke Gifford Depot. This is an excellent opportunity for a skilled technician to work on one of the UK's most advanced fleets, playing a key role in ensuring reliability, safety and performance across a busy operational railway. The Opportunity You will be responsible for carrying out both preventative and corrective maintenance, ensuring trains are serviced, repaired and returned to service in line with strict operational and safety standards. This is a varied role combining depot-based maintenance with occasional...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Apr 17, 2026  
Systems Performance Modelling Engineer
World Class Defence Organisation based in Stevenage and Bristol is currently looking to recruit a Systems Performance Modelling Engineer subcontractor on an initial 12 month contract.  Your base site can be either Stevenage or Bristol, depending on your preference. The role can be worked on a 4 day week basis (Monday to Thursday) but due to the nature of the work, the position will need to be based onsite.     This role would be suitable for a Simulation and Modelling Engineer (Matlab / Simulink) ideally from the defence or aerospace industry.   Rate: £80.00 per hour Location: Your base site can be either Stevenage or Bristol, depending on your preference Hybrid / Remote working: The role will based onsite.  A compressed 4-Day week of Monday to Thursday is possible Contract: 37 Hours per week Overtime: Hours worked over 37 hours per week will be calculated at ‘time and a quarter’ Duration: 12 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Mar 20, 2026  
Test Driven Development Lead
World Class Defence Organisation is currently looking to recruit a Test Driven Development Lead subcontractor on an initial 6 month contract.     Rate: £70.00 per hour Location: Bristol Hybrid / Remote working: The role will be onsite – a compressed 4 day week (Monday to Thursday is fine) Contract: 37 Hours per week Overtime: Hours worked over 37 hours per week will be calculated at ‘time and a quarter’ Duration: 6 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella)                                                                                                                                           Interview Process: One stage Video Interview Test Driven Development Lead Job Description: The UK Embedded Software department is at the core of the company’s projects. We create the complex, highly reliable real-time software that powers our missile systems and their components, ensuring that they provide the performance and...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Mar 12, 2026  
C# / C++ Software Engineer
World Class Defence Organisation is currently looking to recruit 5x C# / C++ Software Engineer subcontractors on an initial 12 month contract.  Desktop C# is the expertise the department are looking for; with some experience with C++ but doesn’t need to be overly extensive. Job Title: C# / C++ Software Engineer Rate: £65.00 per hour Overtime Rate: Hours worked over 37 hours per week will be calculated at ‘time and a quarter’ Location: Stevenage or Bristol (depending on your preference) Hybrid / Remote working: The role will be a hybrid role of 3 or 4 days per week onsite Contract: 37 Hours per week Duration: 12 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella) C# / C++ Software Engineer Job Description: WSSE are integral in the development of weapon systems and system architectures, and as a result we have developed a capability supporting developments across the full product life cycle.   The team integrate real products, models...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Mar 11, 2026  
Java Software Engineer
World Class Defence Organisation is currently looking to recruit a Java Software Engineer subcontractor on an initial 12 month contract.     Job Title: Java Software Engineer Rate: £65.00 per hour Location: Bristol Hybrid / Remote working: The role will be onsite – a compressed 4 day week (Monday to Thursday is fine) Contract: 37 Hours per week Overtime: Hours worked over 37 hours per week will be calculated at ‘time and a quarter’ Duration: 12 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella)                                                                                                                                           Interview Process: One stage Video Interview Java Software Engineer Job Description: The team, at the Bristol facility, develop solutions for the next generation of Air Defence Systems; developing evolving products whilst maintaining their enviable reputation for safety, performance and dependability. This...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Mar 06, 2026  
Senior Finance Business Partner
Senior Finance Business Partner Contract until March 2027 - Inside IR35 Bristol Based (60% onsite) Certain Advantage are recruiting on behalf of our renowned manufacturing client for a Senior Finance Business Partner to work within a procurement ops team providing Financial direction for the Commercial Strategy. You will lead the financial decision process to support commercial decision making in the tendering of detail parts and the subsequent impact of tendering decisions on the financial health and performance of the detail parts supply chain (£200m+). Key challenges in this role will include continuous stakeholder management across multiple interfaces (accounting and procurement up to “Head ofs”), and negotiating with procurement suppliers on key financial topics and performance improvement plans. There will be recurring and ad-hoc activities in this varied role. Typical responsibilities will include; Lead the financial decision process to support commercial decision making...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Mar 04, 2026  
Mechanical Design Engineer
World Class Defence Organisation is currently looking to recruit a Mechanical Design Engineer subcontractor on an initial 6 month contract. Job Title:  Mechanical Design Engineer Rate: £50.00 per hour Location: Stevenage or Bristol (depending on your preference) Hybrid / Remote working: 4 days a week likely onsite (likely could be lower on a week by week basis; depending on work). 1 day remote. (flexible on start and finish time). A compressed 4 day week (Monday to Thursday) a possibility. Contract: 37 Hours per week Overtime: Hours worked over 37 hours per week will be calculated at ‘time and a quarter’ Duration: 6 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella) Mechanical Design Engineer Job Description: An opportunity to become part of Europe’s No. 1 Missile Systems Designer, as a Mechanical Design Engineer. You will work closely with other functional teams, to develop products to meet our customer’s needs. Within this role...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Feb 06, 2026  
Embedded Software V&V Engineer
World Class Defence Organisation is currently looking to recruit 5x Embedded Software V&V Engineer subcontractors on an initial 6 month contract.  Skills in C, C++ or ADA are beneficial.  A defence or aerospace industry background would also be great.   Rate: £70.00 per hour Location: Stevenage or Bristol, depending on your preference. Hybrid / Remote working: Full time on site (occasional work from home day) (The company are happy with a 4 day week) Contract: 37 Hours per week Overtime: Hours worked over 37 hours per week will be calculated at ‘time and a quarter’ Duration: 6 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella) Interview process: 1 stage video interview   Embedded Software V&V Engineer Job Description:   The department create the complex, highly reliable real-time software that powers missile systems and their components, ensuring that they provide the performance and functionality our users require when they...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Feb 04, 2026  
Java Software Engineer
World Class Defence Organisation is currently looking to recruit a Java Software Engineer subcontractor on an initial 12 month contract.    Job Title: Java Software Engineer Rate: £65.00 per hour Location: Bristol Hybrid / Remote working: The role will be onsite – a compressed 4 day week (Monday to Thursday is fine) Contract: 37 Hours per week Overtime: Hours worked over 37 hours per week will be calculated at ‘time and a quarter’ Duration: 12 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella)   Java Software Engineer Job Description: The team, at the Bristol facility, develop solutions for the next generation of Air Defence Systems; developing evolving products whilst maintaining their enviable reputation for safety, performance and dependability. This is a very hands-on role and requires the continued design and development of new and evolving software tools and architectures, and the instantiations for future products. Perfect...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Jan 18, 2026  
Algorithm Software Engineer
World Class Defence Organisation based in Bristol is currently looking to recruit an Algorithm Software Engineer on an initial 6 month contract, with very likely extension.  The role will be onsite 4 days per week.  A 4 day working week is OK (Monday to Thursday).   Rate: £65.00 per hour Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at ‘time and a quarter’ Location: Bristol Hybrid / Remote working: The role will be onsite 4 days per week. A 4 day working week is OK (Monday to Thursday). Duration: 6 Months with very likely extension. Contracts are often ongoing and long-term thereafter.  IR35 status: Inside IR35 (Umbrella) Interview process: One stage video interview   Job Description: Work alongside algorithm engineers and technical expert to transcode a large, complex legacy algorithm codebase from ADA to Matlab As part of a wider team, define, distribute and review core activities to enable efficient completion of the transcoding within project...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Apr 19, 2026  
Site Security Specialist
On behalf of our client, we are recruiting for a Site Security Specialist on a 12-month contract. As the Site Security Specialist you will assist the Security Management team to deliver a robust Security framework that protects the company from the prevailing threat environment. Role: Site Security Specialist Pay: £28 per hour via Umbrella Contract: Monday- Friday, 35 Hours per week, 12-month contract Location: Filton IR35 Status: Inside Security Clearance: BPSS to start however will need to be SC clearable Implementation of protective security activities, compliant with extant policies and frameworks requirements. Assist in the management of Security, Systems & Fire Service Providers Assist with the management of Security & fire Risks and Issues. Assist with the implementation of Emergency Response. Assist with providing appropriate security, systems & fire input into event & project planning and implementation. Assist in adherence to Filton Safety rules....
IR35 Status:
Inside IR35

CV-Library Filton, Gloucestershire Contractor
CL
Apr 16, 2026  
Project Professional
Project Professional Filton or Portsmouth Based (Hybrid working 2-3 days per week on site) £27.22 an hour Umbrella Inside IR35 12 Month Contract initially. This is a great opportunity to work within one of the UK's leading Defence organisations based In Filton or Portsmouth. Hybrid working, 2-3 days per week on site. Role Description Responsible for various aspects of Project Management & Governance (P&G) processes supporting the Programme. Provide support to both the P&G team and the wider Support team to aid delivery of the programme. The jobholder requires the ability to arrive at conclusions and follow the most appropriate course of action. Works within procedural constraints or process and Programme delivery requirements. The post requires good knowledge and experience with Excel and Powerpoint. Undertakes a range of specialist duties specific to the Defence Solutions Support Programme. Knowledge: Can use all Microsoft Office software comprehensively...
IR35 Status:
Inside IR35

CV-Library Filton, Gloucestershire Contractor
CL
Apr 19, 2026  
External Package Manager
External Package Manager - Freelance (Inside IR35) Location: Bridgwater Day Rate: £(Apply online only)/day Are you an experienced Build Package Manager? Have you managed subcontractors through envelope to fit out phases? Looking for a long-term freelance assignment? My main contractor client is looking for an experienced Build Package Manager to oversee two subcontractors delivering the building envelope and full internal fitout on a new build project. This is a site based role where you will be the main point of contact leading the envelope and fit out of this projects. This role will allow you to have a great impact on the project, currently at design stage. Key Responsibilities Manage day to day delivery of envelope and fit out subcontractors Review programmes, track progress and maintain resourcing levels Ensure works meet required quality standards and specifications Drive a strong health & safety culture with regular site checks Work with design/engineering teams...
IR35 Status:
Inside IR35

CV-Library Bridgwater, Somerset Contractor
CL
Apr 15, 2026  
Quantity Surveyor
Are you ready to leave your mark on a historic transformation? A large steel producer is seeking an ambitious and established Quantity Surveyor to join a new project. This isn't just another construction job; it is a monumental effort to modernise and revitalise the UK steel making sector. If you are a commercial powerhouse with a passion for heavy industry and a drive for excellence, we want you at the heart of this legacy project in South Wales. Location: Port Talbot (4 days site-based, 1 day remote) Salary/Rate: £25.00 - £31.60 per hour Inside IR35 (Up to £60,000) Duration: Fixed term until March 2028 Schedule: Mon-Fri, 08:30-16:45 Mon-Thu and 08:30-15:45 Fri Key Responsibilities You will lead the commercial and contractual management of large-scale construction and civil engineering works. Your day-to-day will involve: Budgeting: Preparing and reporting on project budgets, forecasts, and cost plans. Contract Management: Negotiating variations and change orders under...
IR35 Status:
Inside IR35

CV-Library Port Talbot, Neath Port Talbot Contractor
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