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Contractor 29
Outside IR35 software engineer

29 software engineer jobs found

CL
Mar 14, 2026  
Guidance & Control Software Engineer
Guidance & Control Software Engineer (Interception Systems) Location: North London - Hybrid Type: Contract - Outside IR35 Rate: Starting at £50 per hour DOE About the Role Our client develops advanced autonomous weapon and interception technologies designed for high-speed target engagement in contested environments. The programme centres on a vision-guided one-way aerial system capable of autonomously detecting, tracking, and intercepting manoeuvring objects. The software architecture combines real-time perception with predictive guidance and control. This role will be central to the development of the onboard flight and guidance stack, implementing estimation, tracking and control algorithms in performance-critical C++ code. The engineer will work closely with perception, simulation and hardware teams to ensure reliable terminal behaviour under real-world conditions. The Guidance & Control Software Engineer position suits an engineer with experience in missile...
IR35 Status:
Outside IR35

CV-Library Barnet, Greater London Contractor
CL
Mar 14, 2026  
AI Software Engineer- Start up
I'm looking for an experienced AI Engineer to join an exciting, fast‑growing AI start‑up on a 6‑month contract. This is a great opportunity to work on cutting‑edge AI products and play a key role in designing, building and deploying real‑world AI systems. Tech Requirements We are looking for someone with strong commercial experience in: AI Engineering – designing, building and deploying AI systems TypeScript Node.js Python AWS CloudDesirables Prior AI start‑up experience Ability to thrive in fast‑moving, high‑growth environmentsContract Details 6‑month initial contract Outside IR35 Fully remote (must be based in the UK) Must have full right to work in the UK
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Mar 12, 2026  
AI Software Engineer
Role Details: Contract Length: 3–6 months (potential to go permanent) IR35: Outside IR35 Location: Remote, with occasional travel to London/Kent preferred Day Rate: £300–£325 per day  Key Requirements: Hands-on exposure to Azure AI and Machine Learning Experience with Agentic AI, RAG systems, and GraphRAG At least 10+ years’ experience in .NET  Please note: This role cannot offer sponsorship. Applicants must have full rights to live and work in the UK
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Mar 11, 2026  
Embedded Software Engineer
I'm recruiting for a small business in Cheltenham who are looking for an Embedded Software Contractor on a 3 month contract (outside IR35). The work is based around Zephyr RTOS on Nordic chips. Previous experience (in-depth!) is needed for this. ** Work can be done remotely after an initial period of 3-4 days on-site. Also may require on-site visits to Cheltenham throughout depending on project progression. ** ROLE: Embedded Software Engineer LOCATION: Remote (Cheltenham) RATE: up to £60ph DURATION: 3 months Skills required for the Embedded SW Engineer: * C * Zephyr RTOS * Nordic chips * Linux If you're interested, please apply below or get in touch with any questions Cheers, Nathan
IR35 Status:
Outside IR35

CV-Library United Kingdom Contractor
CL
Mar 14, 2026  
DV Cleared Control Systems Engineer
DV Cleared Senior Software Engineer Aldermaston - Onsite 12-month contract | Outside IR35 Are you a DV cleared Software Engineer who can take full ownership of software delivery on site? Do you enjoy building Siemens PLC solutions from scratch in secure, regulated environments? Looking for a long-term contract with a strong on-site engineering focus? What's in it for you ·£650 to £750 per day ·Outside IR35 ·12-month contract ·4-5 days onsite per week ·Work on high-security, technically challenging projects What will you be doing? ·Designing, developing and programming Siemens PLC systems from scratch ·Leading all software activities on an assigned project ·Configuring Siemens PLCs, HMIs and associated networks ·Producing on-site test documentation and supporting FATs and SATs ·Carrying out on-site testing and commissioning of PLC systems ·Acting as the technical interface with the client during delivery ·Providing technical leadership, mentoring and support to other engineers...
IR35 Status:
Outside IR35

CV-Library Reading, UK Contractor
CL
Mar 14, 2026  
Mechanical Design Engineer
Mechanical Design Engineer - Greater Manchester Our client has an open requirement for a Mechanical Design Engineer on a 6 month contract basis with the possibility for further extension. This will operate on an outside IR35 basis so limited company contractors will be able to operate, and a rate between £35 and £43 per hour is expected, subject to level of experience and suitability. Candidates will be required to work in the office full time initially and then switch to a hybrid model of 3 days office based and 2 from home after a few weeks’ orientation. The client is looking for a good engineering background first and foremost with strong experience and knowledge of typical mechanical equipment and terminology including: Limits and fittings, bearings, linear guides, GD&T’s, rotating equipment, and automated equipment such as motors, gearboxes, and drives. They should also have a basic knowledge of working with steel structures. The client is using Creo design software -...
IR35 Status:
Outside IR35

CV-Library Eccles, City and Borough of Salford Contractor
CL
Mar 16, 2026  
Network Engineer
Network Engineer Cardiff On-site 18 Months £400 to £450 Outside IR35 Your new company A large organisation based in South Wales. Your new role The role focusses on deploying Fortinet infrastructure, including Fortigate firewalls, Fortiswitches, and FortiManager. You will lead the network deployment, ensure alignment across business teams, and build strong internal relationships to provide a smooth handover once the implementation is complete. Key Responsibilities Creating Implementation plans using the LLD provided, planning, and installing local area networks (LAN), wide area networks (WAN) Implementing firewalls, switches, taps and centralised mgmt. As required on 2 new sites Testing new implementations and monitoring network performance, analysing data, and performing updates as required to ensure the best possible delivery. Following the successful build of 2 new DC's, there will be a migration exercise out of the existing DC. Review and apply necessary FW changes...
IR35 Status:
Outside IR35

CV-Library Cardiff, UK Contractor
CL
Mar 15, 2026  
Mechanical Design Engineer
Mechanical Design Engineer Location: Derbyshire Rate: £40 - £42 per hour (Ltd – Outside IR35) Contract: 3 – 6 month initial contract – likely to extend Immediate Start Our client is looking for an experienced professional to take a lead role in managing the full design process—from initial concept through to final delivery. This is a unique opportunity to contribute to high-impact projects within a fast-paced, collaborative engineering environment. You'll use tools like CAD and advanced engineering software to validate calculations, support testing, and oversee project execution, working closely with cross-functional teams to ensure quality, efficiency, and client satisfaction at every stage. What Our Client is Looking For: A hands-on background in fabrication and structural engineering Proficiency in engineering calculations – using Mathcad, Excel, and hand calculations Expertise in acoustics, airflow, and thermal systems Experience with both large and small companies,...
IR35 Status:
Outside IR35

CV-Library Derbyshire, UK Contractor
CL
Mar 15, 2026  
Automation Engineer
We're supporting a major engineering organisation delivering large‑scale automation and control upgrades across the UK water sector. Due to increased project workload, they're looking to bring in an experienced Contract Automation Engineer with strong multi‑vendor PLC/SCADA experience and full‑lifecycle project capability. The Role You'll be delivering controls and automation solutions across major water & wastewater treatment projects. This contract involves full lifecycle engineering-from specifications and design through to programming, FAT/SAT, site commissioning, and handover. Technical Requirements You must be proficient in: Allen‑Bradley / Rockwell Automation Studio 5000 / RSLogix 5000 FactoryTalk View SE/ME Schneider Electric EcoStruxure Control Expert (Unity Pro) SCADA/HMI platforms Mitsubishi Software GX Works / GX Developer Ideal Background This will suit contractors who have previously worked with businesses known for water sector systems integration,...
IR35 Status:
Outside IR35

CV-Library Staffordshire, UK Contractor
CL
Mar 15, 2026  
Senior Civil Engineer
We are seeking an experienced Senior Civil Design Engineer to support a portfolio of National Grid infrastructure projects. The role involves leading the civil and structural design elements for substation, overhead line, and other transmission‑related assets, ensuring compliance with National Grid's technical specifications and governance processes. This is an Outside IR35 contract position, offering hybrid working with on‑site collaboration. Key Responsibilities Lead and produce civil and structural designs for National Grid transmission projects (substations, foundations, compounds, cable routes, OHL works, access roads, drainage, etc.). Ensure all designs comply with National Grid TP / TS standards and relevant industry codes (BS EN, Eurocodes). Prepare design calculations, sketches, reports, specifications, and technical documentation. Manage design risk assessments and contribute to CDM compliance. Coordinate with multidisciplinary teams including electrical, geotechnical,...
IR35 Status:
Outside IR35

CV-Library United Kingdom Contractor
CL
Mar 15, 2026  
Senior Mechanical Design Engineer
Position: Mechanical Design Engineer Location: Castle Donington - Hybrid Contract: Outside IR35 Type: Full-Time The Role This is an outside IR25 assignment expected to last between 6 - 12 months with the successful contractor involved in the design of a range of fabrications and components used in turbomachinery applications. Key Responsibilities: Create detailed 3D models and assemblies using Siemens NX. Generate engineering drawings Perform engineering design calculations eg Perform tolerance stack-up analysis , bolted joint. Preparation of engineering design reports Engage with suppliers and lead design for manufacturing activities Ensure designs meet industry standards, customer specifications, and regulatory requirements. Required qualifications and experience: Bachelor's degree in Engineering. Experience designing castings, machined parts and fabrications. Experience using BS8888 and/or ASME Y14.5 Proficiency in NX software. Strong skills in mechanical...
IR35 Status:
Outside IR35

CV-Library Castle Donington, Leicestershire Contractor
CL
Mar 13, 2026  
Embedded UAV Flight Control Engineer
Embedded UAV Flight Control Engineer Location: Blandford Forum (Onsite) Contract Type: 6 Month Contract Rate: £45 per hour (Outside IR35) We are seeking an experienced Embedded Engineer to support the development of an advanced unmanned aerial platform. This role focuses on embedded flight control software, electronics integration, and real-time system validation within a hands-on engineering environment. Key Responsibilities • Develop and enhance embedded flight control software (PX4 / ArduPilot or similar flight stacks). • Integrate and debug hardware interfaces including SPI, I2C, CAN and UART. • Support hardware bring-up and board-level debugging of flight control electronics. • Implement and optimise real-time messaging and driver-level functionality. • Contribute to fail-safe and system robustness strategies. • Conduct bench and hardware-in-the-loop testing. • Work closely with electronics and systems teams to support integration activities. Required Experience • Strong...
IR35 Status:
Outside IR35

CV-Library DT11, Blandford Forum, Dorset Contractor
CL
Mar 13, 2026  
Design Engineer
Design Engineer Coventry, UK (Onsite) Salary + Benefits £35,000 - £45,000 per annum (Fixed-Term Contract) or £275 - £350 per day (Ltd Company Contractor - Outside IR35) Shift Pattern / Working Hours Monday - Thursday: 08:00 - 16:35 Friday: 08:00 - 15:10   Must hold active UK Security Clearance   An established engineering organisation operating within the defence vehicle sector is seeking immediately available Design Engineers to support global vehicle programmes. This role focuses on developing advanced vehicle protection and integration solutions that enhance safety, performance, and operational capability. You will work across the full design lifecycle, from initial concept through to production, contributing to technically challenging projects in demanding environments. This is a hands-on position within a collaborative engineering team, offering the opportunity to work with complex assemblies and specialist materials. Both fixed-term and day-rate engagement...
IR35 Status:
Outside IR35

CV-Library Coventry, UK Contractor
CL
Mar 11, 2026  
Electrical Services Engineer
ARM are recruiting a Residential Electrical Engineer to support a major project at Devonport Royal Dockyard. Reporting to the Lead Construction Manager, you will be responsible for overseeing and assuring the quality of electrical installation and commissioning activities throughout the construction lifecycle. Your primary focus will be electrical works within facilities supporting submarine refit operations, ensuring compliance with scope, standards, and safety regulations. Key responsibilities: Ensuring delivery of site quality through active management, advice, and on-site support Witnessing installation and commissioning activities Managing day-to-day planning matters alongside the Lead Construction Manager Providing technical guidance to construction and project teams Resolving site issues and Technical Queries within contractual timescales Ensuring contractors adhere strictly to scope of works and approved change requests Conducting and recording inspections in...
IR35 Status:
Outside IR35

CV-Library Plymouth, Devon Contractor
CL
Mar 11, 2026  
PLC Service Engineer
PLC Service Engineer (Contract – 10 Weeks) Location: Midlands (Telford and Nottinghamshire based) Contract Length: Approximately 10 weeks with potential extensions  Rate - £45ph to £50ph Outside IR35 LTD Working Pattern: 1 week of night on call only 6pm to 6am Monday to Sunday 1 week of days on call 6am to 6pm Monday to Sunday Followed by 2 weeks on days Monday to Friday 8am till 5pm of which they will be assisting with commissioning of systems or other service works required Role Overview We are seeking an experienced PLC Service Engineer to support automation and conveyor systems across the Midlands region. This is a primarily remote-based role, with engineers responding to site callouts as required. During the on call shifts the engineer isn't expected to be anywhere but at home answering the phone if a call comes in or responding to tickets as a customer raises them to us on a common platform we use. The engineer will only be expected to go to site if it is a software...
IR35 Status:
Outside IR35

CV-Library Lichfield, UK Contractor
CL
Mar 11, 2026  
Senior Mechanical Design Engineer
Mechanical Design Engineer – Water & Wastewater | Manchester (Hybrid) Location: Manchester – Hybrid working available Type: Permanent or Contract (Outside IR35) Want to design infrastructure that keeps the UK’s water and wastewater networks running safely and efficiently? Ready to take ownership of technical delivery while working on nationally important treatment works upgrades? Our client is expanding their specialist design team and is looking for a Mechanical Design Engineer to deliver high-quality, compliant solutions across major UK water industry projects. What You’ll Do Design mechanical solutions that meet safety, quality, and technical standards Produce design calculations, drawings, reports, and specifications Direct and support CAD technicians Prepare scopes and review outputs from subcontract M&E design teams Liaise with suppliers, review tenders, and specify equipment Carry out design investigations and technical reporting Ensure design changes are...
IR35 Status:
Outside IR35

CV-Library 3 Dickinson St, Manchester M1 4LF, UK Contractor
CL
Mar 11, 2026  
Engineering Manager - Water
Engineering Manager – Water & Wastewater | Manchester (Hybrid) Location: Manchester – Hybrid working possible Type: Permanent or Contract (Outside IR35) Want to lead a multidisciplinary engineering team delivering critical UK water and wastewater infrastructure? Ready to take full ownership of technical leadership, design strategy, and team development on nationally important projects? Our client is expanding their specialist design function and is looking for an Engineering Manager to oversee mechanical, civil, and process design, ensuring high-quality, integrated solutions across major UK water industry projects. What You’ll Do Lead and develop engineers, CAD technicians, and graduates across multiple projects Act as Professional Head for the design function, guiding compliance with technical, professional, and water company standards Approve design packages and ensure full integration across disciplines Identify and implement safe, efficient, and value-engineered...
IR35 Status:
Outside IR35

CV-Library 3 Dickinson St, Manchester M1 4LF, UK Contractor
CL
Mar 10, 2026  
BMS Design Engineer
Role: BMS Engineer - Design Location: London - Hybrid working Duration: 12 month initial contract Pay Rate: £400-£450 P/day OUTSIDE IR35 The BMS design engineer should fully understand the engineering requirements of building control systems for a range of building types, varying in complexity. Candidates will need a thorough understanding of both mechanical and electrical building systems and be able to work autonomously. The role will require experience of interpreting customer specifications to develop comprehensive designs and scope packages for individual disciplines including panel design, hardware configuration, field equipment, software configuration, graphic packages as well as installation and commissioning scope. Candidates must also be prepared to work flexibly as part of the team and be pro-active with modern technologies and best practice. Applicants should have engineering skills as detailed below: Electrical and Mechanical systems and plant knowledge, BMS...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Mar 08, 2026  
Civil Design Engineer
Civil / Senior Civil Engineer - Wastewater Infrastructure Brighton | Hybrid Working | Outside IR35   Are you a Civil Design Engineer with UK wastewater infrastructure experience ready to play a key role in AMP8 delivery?   Whether you're developing your capability, operating at senior level, or already performing as a Design Manager - this is an opportunity to join a growing consultancy delivering technically complex wastewater network schemes.   An expanding detailed design team in Brighton is looking to appoint engineers across varying levels of experience to support the design and delivery of: ·Sewerage rising mains and trunk sewers ·Wastewater pipeline rehabilitation and renewals ·Pumping stations and gravity sewer systems ·Feasibility studies, optioneering and asset assessments You'll work within a technically strong team delivering compliant designs aligned to Sewerage Sector Guidance, Water UK standards and UK regulatory frameworks.   Senior-level engineers...
IR35 Status:
Outside IR35

CV-Library Brighton, Brighton and Hove, UK Contractor
CL
Mar 04, 2026  
Commissioning Engineer
Commissioning Engineer – Automation & Robotics £45–50 per hour | 6-Month Contract | Outside IR35 Wolverhampton | Site-Based (No Hybrid / Remote Working) We’re looking for an experienced Commissioning Engineer to join a project team working on automation and robotic machinery for a major industrial installation. This is a 6-month contract, Outside IR35, offering long hours and solid continuity for the right contractor. The role is fully site-based in Wolverhampton and will require regular on-site presence throughout the contract. The Role * Commissioning of automated and robotic systems on-site * PLC commissioning and software development using Siemens TIA Portal * Fault finding, testing, and system optimisation during commissioning phases * Working closely with mechanical, electrical, and controls teams * Supporting site acceptance testing and handover Key Skills & Experience * Proven experience commissioning...
IR35 Status:
Outside IR35

CV-Library Wolverhampton, West Midlands (County) Contractor
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