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Contractor software test engineer

84 software test engineer jobs found

CL
Jun 21, 2026  
Software Test Engineer
World Class Defence Organisation is currently looking to recruit a Software Test Engineer subcontractor on an initial 12 month contract. Rate: £65.00 per hour Location: Stevenage Hybrid / Remote working: 4 days a week likely onsite.  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: 12 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella) Software Test Engineer Job Description: An exciting opportunity to work as a Software Testing Engineer within the Environment Simulators team based in our Stevenage office with our simulation developers.  The Simulation Software department is at the forefront of developing simulations for the Weapon System and sub-systems teams using the full development life cycle and agile methodologies.  Our simulations follow best practices and capability to ensure our products...
IR35 Status:
Inside IR35

CV-Library Stevenage, UK Contractor
CL
Apr 09, 2026  
Software Test Engineer
Software Test Engineer Certain Advantage is hiring for a Software Test Engineer based in the Guildford or Newcastle area. This role is on a contract basis and is hybrid-based. The Company We’re working with a Manufacturing business that operates in the Aerospace sector. They design, manufacture and deliver industry-leading commercial aircraft, and a separate Space and Defence division. Does this sound like your next career move? If you’re ambitious to grow, this may be your next role? The Role: This role is for a Software Test Engineer —someone ambitious and ready to make an impact. You’ll be results-oriented and driven to succeed. You’ll be working in a small, experienced, and collaborative team, and be responsible for: Task estimation in accordance with sprint planning. Design of tests within an agile environment using a test management tool. Design and execution of automated and exploratory tests, particularly in RESTful API environments. Test of Web applications Contribution...
IR35 Status:
Unknown Status

CV-Library Newcastle upon Tyne, UK Contractor
CL
Jun 26, 2026  
Software and Systems Test Coordination Engineer
Position Title: Software and Systems Test Coordination Engineer Duration: Contract Location: Gaydon Based in West Midlands £35.80 per hour (Inside IR35) *Applicants MUST have proof of immediate, on-going and valid eligibility, to work full time, and travel within, the UK* Duties: This role (Software and systems test coordination engineer) is responsible for overseeing the overall testing status of the EVA25 programs. While the role demands a high level of technical understanding, it is not hands-on testing role. The successful candidate will ensure consistent adherence to established processes, effective utilisation of issue management tools and clear and transparent reporting to senior stakeholders.​ Key aspects of this role involves the ability to drive and prioritise actions and process changes based on clear KPIs around testing management with stakeholders across the company. Strong skills in developing metrics, dashboards and professional presentations are...
IR35 Status:
Inside IR35

CV-Library Warwick, Warwickshire Contractor
CL
May 28, 2026  
Senior Software Engineer in Test
Senior Software Engineer in Test  Certain Advantage are recruiting on behalf of our globally renowned brand for a Senior Software Engineer in Test. This is a temporary contract inside IR35 initially until March 2027 working a couple of days onsite per month in Manchester for meet ups. We’re seeking Engineers who can offer demonstrable experience in developing and testing bespoke cloud-native applications; programming with Java, Python (or another OO language) utilising quality tools like SonarQube, with proven experience of automated software testing. If you embrace quality-first coding and want to work on real projects alongside experienced engineers with iterative and agile processes, please apply! Key Responsibilities Define and implement testing for cloud systems (platform and APIs) in an agile manner Implement testing frameworks; utilising automation tools where possible. Support the investigate and resolution of issues. Work closely with the SRE team to develop...
IR35 Status:
Inside IR35

CV-Library Manchester, UK Contractor
CL
Jul 02, 2026  
Electrical Modification Technician
Job title: Electrical Modification Technician Job location: Burton-On-Trent Shifts: Days with flexibility to do shifts when required Hours per week: Average 40 - 45 hours per week Rates: £23.15 PAYE / £30.13 Umbrella Duration: 12 Months+ Start date: ASAP Industries considered: Rail, Rolling Stock, RAF, REME, Army, Navy, Marine, Avionics, Rolling Stock, Commercial/Industrial Electrics, Defence, Plant Engineering, SPM, HVAC, and Process Engineering Disciplines considered: Diesel Engine Fitter, Mechanical Engineer, Mechanic, Avionic Technician, Aircraft Engineer, Marine Engineer, Maintenance Fitter, and Breakdown Engineer Company Summary: They are a global leader in Rolling Stock vehicle manufacturing, service and maintenance. Position Summary This position is for an electrically biased technician, to carry out both mechanical and electrical modifications, exam tasks and system testing. You will be expected to work from modification...
IR35 Status:
Unknown Status

CV-Library Burton-On-Trent, Staffordshire Contractor
CL
Jul 02, 2026  
Network Engineer
Network Engineer +18 months + +DV cleared - current active clearance +Hybrid working in Corsham +Inside IR35 +£575 - £625 a day We are seeking an experienced Network Consultant / Network Engineer to join a highly skilled technical team responsible for the design, development, implementation and support of complex, secure network infrastructures. This role will focus on designing, building and validating both physical and virtual networking solutions within a highly secure environment. You will work across the full engineering lifecycle, from requirements and design through to implementation, testing, documentation and operational support. This is an excellent opportunity for a network professional operating at CCNP level or above who enjoys working across architecture, implementation, testing and stakeholder engagement within challenging and technically demanding environments. Key Responsibilities Design, develop, build and validate network infrastructure components....
IR35 Status:
Inside IR35

CV-Library Corsham, Wiltshire Contractor
CL
Jul 02, 2026  
Electrical & Control Design Engineer
Electrical & Control Design Engineer - Contract Opportunity 🚨 Are you an experienced Electrical & Control Design Engineer looking to work on cutting-edge subsea technology? We're supporting a market-leading engineering organisation at the forefront of remotely operated subsea vehicle development and are looking for a talented engineer to join their team on an initial 6-month contract. 📍 Newcastle 💰 £45-£55 per hour 📄 Outside IR35 📅 Initial 6-month contract with potential extension 🔧 What You'll Be Doing Design, develop, test, and commission advanced electrical and control systems for world-class subsea vehicles and equipment. Take ownership of projects throughout the full engineering lifecycle, from concept and specification through to commissioning, customer acceptance, and field support. Develop and implement PLC, HMI, and SCADA solutions while supporting electrical system integration activities. Participate in Factory Acceptance Testing (FAT), Site Acceptance...
IR35 Status:
Outside IR35

CV-Library Newcastle upon Tyne, Tyne and Wear Contractor
CL
Jul 02, 2026  
Endpoint Engineer
Endpoint Specialist to join a fast-paced IT environment supporting a multi-site, multi-domain organisation. Key Responsibilities Deploy and maintain software across the end-user estate using Microsoft Intune Manage software updates, patching, and auto-update strategies to improve security and compliance Provide 3rd line support for software-related incidents Use Microsoft Defender to identify and remediate vulnerabilities Plan, test, and implement secure software updates and changes Collaborate with internal teams and vendors on software roadmaps and licencing compliance Ensure all solutions are delivered to meet customer needs and SLA targets Support infrastructure design and optimisation for software deliveryKey Skills & Experience Strong scripting skills (PowerShell, VBScript) Proven experience with Microsoft Intune for application packaging and deployment Hands-on experience with Microsoft Defender vulnerability management Knowledge of MSIX App Attach Solid understanding...
IR35 Status:
Unknown Status

CV-Library Manchester, Greater Manchester Contractor
CL
Jul 02, 2026  
Embedded Test Automation Engineer
Automated Test & HIL Engineer (Embedded Systems) Hybrid - London - circa £55 per hour Umbrella - Contract (7-8 months) We're looking for a hands-on Automated Test & Validation Engineer to help verify next-generation mission-critical embedded power systems used in critical global infrastructure. This is a high-impact role focused on HIL development, closed-loop testing, and automated validation of complex hardware and firmware. The Role You'll take ownership of Hardware-in-the-Loop (HIL) test systems and build robust automated test frameworks using NI LabVIEW TestStand. Working across Hardware, Software, and Validation teams, you'll ensure systems perform safely, reliably, and exactly as intended. This is a build-it, break-it, prove-it environment-perfect for someone who thrives in deep technical problem-solving and system-level validation. What You'll Do Design and own HIL test systems for closed-loop embedded validation Build and maintain automated test frameworks...
IR35 Status:
Unknown Status

CV-Library Greenwich, London Contractor
CL
Jul 01, 2026  
Senior Test Development Engineer (LabVIEW)
Senior Test Development Engineer Location: Glenrothes or Livingston About the role: Responsible for the design, manufacture, verification and validation, along with through life technical support of board level, sub-system and system level test equipment. Skills: • Test software design • Excellent knowledge of analogue and digital electronic circuit design • Ability to write comprehensive technical design documentation • Proven knowledge in handover and management of designs in production • Excellent hardware troubleshooting skills • Able to support/debug system integration • Must be eligible for MOD Security Clearance to a minimum of SC level Highly Desirable: • Significant test development in a safety critical industry • Use of Mentor Graphics schematic entry and PCB layout tools • Understanding of common test architectures PXI/d LXI • Measurement Uncertainty and its application in test equipment design and validation • Software...
IR35 Status:
Unknown Status

CV-Library Edinburgh, UK Contractor
CL
Jul 01, 2026  
Senior Mechanical Design Engineer (NPI)
A contract position Outside IR35 Hybrid working - 3 days p/w on site typically A Senior Mechanical Design Engineer specialising in New Product Introduction (NPI) on a contract basis. This is a unique opportunity to apply your expertise in mechanical design engineering to shape the next generation of advanced automotive components. Key Responsibilities: Clean-sheet mechanical design and development of rotating electrical machines, transmissions and drivetrains. Design work may also include pumps, fans, power electronics and batteries as required. Exploration, design development, prototyping and testing of concepts. Mechanical analysis of conceptual designs (including CAE), demonstrating a strong understanding of likely component failure modes and material strengths. Build and test of prototype hardware and test rigs as necessary. Build and strengthen the company's position within key markets by bringing industry-leading products from prototype through to production. Individually...
IR35 Status:
Outside IR35

CV-Library Tyne and Wear, UK Contractor
CL
Jul 01, 2026  
IBM Z Storage Manager
Role: IBM Z Storage Manager Location: Sheffield , UK Type od Work: Contract Mode of Work: 2-3 Days Onsite in a week Responsibilities: The zSeries Storage Engineer is responsible for leading, building and supporting the zSeries Storage hardware and software infrastructure. This role will carry out some or all of the following activities * Perform a Technical Project Management role for large zSeries infrastructure deployment and evergreening projects * Setup automation to reduce manaual interventions in the Storage infrastructure * Test new software and exploit functionality * Consolidate and reduce infrastructure complexity * Risk and Cost Management * Ensure Service Quality Targets are met for offered platform services * Business stakeholder management * Vendor liaison and management * zSeries Storage hardware / software design, configuration, testing, implementation and support Specific Expertise and Experience (Technical/Business/Tool) 1. IBM...
IR35 Status:
Unknown Status

CV-Library South Yorkshire, UK Contractor
CL
Jun 28, 2026  
High Level Technician (Rolling Stock)
Job Title: High Level Technician (Rolling Stock) Job Location: Southwest London Hourly Pay Rate: £31.48 PAYE / £ 41.11 Umbrella Shifts: Minimum of 50 hours a week Shift Pattern: Panama . Days and nights Duration: On-going contract Start Date: ASAP Industries considered: Rail, Rolling Stock, RAF, REME, Army, Navy, Marine, Avionics, Rolling Stock, Commercial/Industrial Electrics, Defence, Plant Engineering, SPM, HVAC, and Process Engineering Disciplines considered: Diesel Engine Fitter, Electrical Engineer / Mechanical Engineer, Mechanic, Avionic Technician, Aircraft Engineer, Marine Engineer, Maintenance Fitter, and Breakdown Engineer Client Summary: A world-renowned Rolling Stock vehicle manufacturing, service and maintenance company and is the number one provider of rail solutions in the world. This prestigious company is also the largest rolling stock manufacturer and provider in the UK and...
IR35 Status:
Unknown Status

CV-Library South West London, London Contractor
CL
Jun 26, 2026  
Electrical Modification Technician
Job title: Electrical Modification Technician Job location: Nottingham Shifts: Days Monday to Friday or Sunday or Thursday Must be flexible to do the odd night shift if requested Hours per week: 45 to 50 hours per week Rates: First 40 hours £22.85 Paye - £29.74 Umbrella After 40 hours £28.57 - £34.65 Umbrella Duration: Ongoing Start date: ASAP Industries considered: Rail, Rolling Stock, RAF, REME, Army, Navy, Marine, Avionics, Rolling Stock, Commercial/Industrial Electrics, Defence, Plant Engineering, SPM, HVAC, and Process Engineering Disciplines considered: Diesel Engine Fitter, Mechanical Engineer, Mechanic, Avionic Technician, Aircraft Engineer, Marine Engineer, Maintenance Fitter, and Breakdown Engineer Company Summary: They are a global leader in Rolling Stock vehicle manufacturing, service and maintenance. Position Summary This position is for an electrically biased technician, to carry out electrical modifications and system testing. You will be...
IR35 Status:
Unknown Status

CV-Library Nottingham, Nottinghamshire Contractor
CL
Jun 26, 2026  
Hardware Engineer (Test Equipment)
Test Equipment Sustainment Engineer Location: Cheltenham (4 days per-week onsite) Duration: 12 Month initial contract Rate: Negotiable on experience Inside IR35 Our client, a reputable leader in aviation electric power engineering, is hiring a dedicated Test Equipment Sustainment Engineer to join their team in Cheltenham. This is a fantastic opportunity to contribute to critical projects, ensuring the seamless transition and sustained performance of test equipment in a high-tech environment. What you'll be doing: * Lead the transfer of test equipment and supporting documentation from engineering to supply chain. * Manage reliability and yield improvement projects to optimise test equipment performance. * Update documentation and drawings in line with company standards. * Provide technical guidance to test systems teams and stakeholders. * Mentor junior engineers and support continuous improvement initiatives. * Ensure safety compliance within engineering labs. * Support...
IR35 Status:
Inside IR35

CV-Library Cheltenham, Gloucestershire Contractor
CL
Jun 26, 2026  
Principal Commissioning Engineer (EC&I)
Role: Principal Commissioning Engineer (EC&I) Location: Plymouth Duration: 12 months Inside IR35 : Umbrella Main Purpose: The role exists in order to develop and implement site commissioning arrangements across all aspects of site activities (e.g. Installation, Commissioning, Handover) in support of the overall project lifecycle. The Principal Commissioning Engineer is responsible for ensuring that activities for the MENSA project are planned and undertaken in line with approved procedures as directed by the Commissioning Manager (or delegate) and report any technical or safety issues via the correct reports (Commissioning Reservations, Technical Queries and Synergi) as appropriate. The Principal Commissioning Engineer will also undertake specific activities on behalf of the Commissioning function as required activities if required. Responsibilities Supervision of the Commissioning Engineers / Technicians under their direct responsibility. Adherence to the agreed...
IR35 Status:
Inside IR35

CV-Library Plymouth, Devon Contractor
CL
Jun 26, 2026  
Application Software Engineer C
Application Software Engineer C++ JOB LOCATION: BRISTOL SECURITY CLEARANCE LEVEL: SC to Start DURATION: 12+ Months (Extension Possible) WORK PATTERN: Full Time ONSITE (Compressed Option Available) - Could be flex every now & then (work dependent). RATE: £ 65.00 Per hr on Umbrella (Inside IR35) TARGET INDUSTRIES AND COMPANIES. Is Defence a must? If not what industries can be considered Preferable for Defence/Aero; not essential if skill sets are apparent from others (Mathematics/algorithm background). ALTERNATIVE JOB TITLES IN OTHER COMPANIES OR INDUSTRIES - Essential Skillset & Tools * 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. Overview: * The team is implementing a demonstration system for a complex new Command and Control application, which...
IR35 Status:
Inside IR35

CV-Library Bristol, City of Bristol Contractor
CL
Jun 25, 2026  
DIG PNT Test Engineer
V06069 – DIG – PNT Test Engineer Filton 1 position (part time)  This role will be 60-80 days over a 6 months period starting in October 2026 Full time on site SC Subject to ITAR Inside IR35 Role Description We are looking to recruit a Test Engineer to conduct comprehensive testing of Positioning, Navigation and Timing (PNT) equipment. This role supports the validation, verification, and performance assessment of PNT systems to ensure operational reliability and compliance with mandated standards. This is a 6-month (0.5 FTE) role commencing October. Flexibility to adjust working days within the week may be required to meet testing schedules. Your primary place of work will be Filton, Bristol, but you will be expected to travel to various UK locations to engage with end-users and conduct test events on a regular basis. It is envisaged there will be up to 3 weeks of overseas travel. Core Duties Typical duties include (but are not limited to): ·...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Jun 25, 2026  
Software Engineer
World Class Defence Organisation based in Bristol is currently looking to recruit 3x Software Engineer subcontractor on an initial 12 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).  Possibility of some remote working (project dependant) Duration: 12 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: The role is within a team implementing a demonstration system for a complex new Command and Control capability, this extends existing concepts and logic. If the demonstration is successful, it may develop...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
CL
Jun 25, 2026  
Application Software Engineer
Application Software Engineer 12-month contract Onsite in Bristol SC must be in place prior io starting £65ph, UMB, inside IR35 Our client, a leading organisation in the Defence & Security sector, is currently seeking an Application Software Engineer for a contract position in Bristol. This role involves participating in the development and testing of a Command and Control application system, with the potential for significant impact on future projects if the demonstration is successful. Key Responsibilities: Developing application-level software, including sophisticated business logic Collaborating with internal algorithm teams to integrate algorithms and test complex transformation logic Implementing and integrating interfaces with other subsystems and external simulators Building and extending components within an existing software application framework Deploying applications into a virtualised test environment Ensuring software solutions meet system requirements within...
IR35 Status:
Inside IR35

CV-Library Bristol, UK Contractor
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