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Outside IR35 Stevenage mechanical design engineer

15 mechanical design engineer jobs found in Stevenage

CL
Mar 15, 2026  
Mechanical Design Engineer
Job Title: Mechanical Design Engineer Location: London (Hybrid Working) Job Type: Contract Duration: 3 Months IR35 Status: Outside IR35 Hours: 37.5 per week Start Date: Immediate Overview An opportunity is available for a Mechanical Design Engineer to support the delivery of Stage 3-4 commercial fit-out projects within a Building Services environment. This is a 3-month contract role, offering hybrid working across London, suited to a technically strong mechanical engineer who can quickly integrate into an existing team and contribute to ongoing project delivery. Key Responsibilities Deliver mechanical design packages for Stage 3-4 commercial fit-out projects Produce detailed HVAC designs, calculations and specifications Develop ductwork and pipework layouts Coordinate with electrical and public health engineers Attend design meetings (virtual and in-person where required) Ensure compliance with UK Building Regulations and industry standards Support project teams in...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Mar 20, 2026  
Fire Suppression Design Engineer
Job Title: Fire Suppression Design Engineer Location: Remote working - Occasional travel to Aberdeen / London Role Type: Contract Duration: 12 months Rate: £50.00 - £60.00 per hour Outside IR35 Our client, an established engineering consultancy, require an experienced Fire Suppression Design Engineer to join their multi-disciplined team working on a large-scale industrial power generation project. What the role of the Fire Suppression Design Engineer entails: Requirements validation and specification, based on gas turbine installation and interface with existing fire suppression systems, of Oil mist detection, gaseous fuel detection and fire detection system for the installation Conduct any Risks & Hazards assessment to support design and specifications Support technical specification and selection of sensors and systems for gaseous fuel detection, oil mist detection and fire detection across Ensure designs comply with applicable international and regional safety...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jan 21, 2026  
Senior HVAC Design Engineer
We are working with this leading multi national data centre and mission critical specialist who are working on schemes across UK and europe. With data centres being crucial components of today's infrastructure, supporting everything from business to public services. Operators must ensure the longevity, efficiency, and sustainability of their sites while optimizing them for mission-critical tasks. The teams are at the forefront of designing innovative and energy-efficient data centres, ensuring that our clients meet their goals of performance, cost-efficiency, and sustainability. The Opportunity Join our international and multidisciplinary team of passionate design engineers and help us create high-quality, sustainable, and innovative data centre structures. You will work on medium to large-scale mission-critical projects, covering all stages of design - from concept to construction supervision and handover. As part of an interdisciplinary team of architects, advisors &...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Dec 28, 2025  
Senior HVAC Design Engineer
We are working with this leading multi national data centre and mission critical specialist who are working on schemes across UK and europe. With data centres being crucial components of today's infrastructure, supporting everything from business to public services. Operators must ensure the longevity, efficiency, and sustainability of their sites while optimizing them for mission-critical tasks. The teams are at the forefront of designing innovative and energy-efficient data centres, ensuring that our clients meet their goals of performance, cost-efficiency, and sustainability. The Opportunity Join our international and multidisciplinary team of passionate design engineers and help us create high-quality, sustainable, and innovative data centre structures. You will work on medium to large-scale mission-critical projects, covering all stages of design - from concept to construction supervision and handover. As part of an interdisciplinary team of architects, advisors &...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Mar 15, 2026  
Principal Temporary Works Engineer
Principal Temporary Works Engineer Contract: Long-term Location: Remote with required site/office visits Rate: Competitive Scope: Outside IR35 Overview Our client is a leading UK infrastructure delivery specialist, supporting major national programmes across transportation, energy, water, defence, and complex engineering environments. They are recognised for delivering high-integrity design and construction solutions on some of the country’s most critical and technically demanding projects. With a strong focus on safety, innovation, and sustainable delivery, they work in partnership with government and industry to modernise and maintain essential infrastructure. We are seeking a Principal Temporary Works Engineer to join a specialist design team on a long-term contract. You will lead temporary works engineering activities across a range of complex projects, ensuring safe, compliant, and efficient design solutions. This role requires strong technical leadership, design assurance...
IR35 Status:
Outside IR35

CV-Library Greater London, UK Contractor
CL
Mar 21, 2026  
FPGA Engineer
FPGA Engineer - 6-Month Contract (Outside IR35) Location: Cambridge, UK (Office-based) Rate: £60 - £80 per hour We are seeking an experienced FPGA Engineer to join a pioneering technology consultancy in the defence and security sector. This role offers the opportunity to work on cutting-edge projects, developing and implementing FPGA-based solutions that have real-world impact. You will collaborate with multi-disciplinary teams on projects ranging from proof-of-concept prototypes through to working systems, covering the full product lifecycle from design to delivery. Key Responsibilities: Develop and implement FPGA firmware (VHDL/Verilog) using toolchains such as Vivado or Quartus Contribute to design, testing, and documentation of FPGA-based systems Support the creation of prototypes and working hardware for advanced technology projects Apply knowledge of DSP/system modelling, embedded software, or communications applications where relevant Collaborate with engineers and...
IR35 Status:
Outside IR35

CV-Library Cambridge, Cambridgeshire Contractor
CL
Mar 18, 2026  
Embedded Software Engineer - Contract (Outside IR35) - Cambridge - SC Clearance
Embedded Software Engineer | 6-Month Contract (Outside IR35) | Cambridge Location: Cambridge, UK Contract Type: 6 months (Outside IR35) Rate: Competitive (DOE) Security Clearance: SC Clearance required About the Role We are working with a leading UK defence and security technology consultancy, engaged in developing cutting-edge solutions that protect the UK from emerging technological and cyber threats. As an Embedded Software Engineer, you’ll work alongside a multi-disciplinary team of scientists and engineers to design, develop, test, and deliver prototype solutions. This is a hands-on, technically challenging role where your work will have real-world impact. Responsibilities: Develop embedded software for high-tech systems, primarily in C (Linux environment) Collaborate with teams on design, prototyping, and full product lifecycle development Debug and optimise software and hardware interfaces Contribute to technical problem-solving and innovative solutionsRequired...
IR35 Status:
Outside IR35

CV-Library Cambridge, UK Contractor
CL
Mar 21, 2026  
Senior Civil Engineer
Location: London (2-3 days in office) Contract Type: Long-term contract (Outside IR35) Hours: 40 per week Equipment: To be supplied by company   About the Role: We are currently seeking a talented Civil Engineer or Senior Civil Engineer to join a well-established consultancy based in London. The role involves working on a variety of development infrastructure projects, including drainage strategies and flood risk assessments. The successful candidate will have strong experience using Civil 3D and Infodrainage software, and will play a key role in delivering complex infrastructure solutions for both public and private sector clients.   Key Responsibilities:   ·Design and manage infrastructure projects for residential, commercial, and mixed-use developments. ·Prepare drainage strategies, flood risk assessments, and other associated reports. ·Utilise Civil 3D and Infodrainage to model and design drainage systems. ·Collaborate with multi-disciplinary teams, including...
IR35 Status:
Outside IR35

CV-Library Central London, London WC2N 5DU, UK Contractor
CL
Mar 20, 2026  
Data Modeler
Here's a clean job advert for you: Data Modeller | Banking | £450/day | Outside IR35 | Hybrid – London | 6-Month Contract Must have the right to work in the UK The Opportunity We're looking for an experienced Data Modeller to join a leading financial services organisation on a 6-month contract. This is an outside IR35 engagement offering a day rate of £450, with a hybrid working pattern based in London. The Role As a Data Modeller, you'll be embedded within a data and technology team, responsible for designing, developing, and maintaining logical and physical data models that underpin critical banking operations. You'll work closely with business analysts, data engineers, and architecture teams to ensure data structures are robust, scalable, and aligned with regulatory and business requirements. Key Responsibilities * Design and develop conceptual, logical, and physical data models across banking domains * Work with stakeholders to gather and translate business...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Feb 27, 2026  
Front End Developer
Senior Front-End Developer (Creative Technologist) * 6-month contract (initially) * Market Rates * Outside IR35 * Remote Working (plus x1 day per week in central London) The Opportunity Our client is seeking a Senior Creative Technologist / Senior Front-End Developer to play a pivotal role in shaping the future of the Client Design Practice for a $bn US tech platform and influence the delivery of globally recognised digital experiences, Joining a forward-thinking organisation at the intersection of design, technology and innovation, where you will help define how advanced prototypes and production-ready digital platforms are conceived, engineered and delivered, while working within a highly creative and technically ambitious environment. You will be consulting alongside the Technology Director, Lead Visual Designer and an established Offshore Development team to ensure creative ideas are not only technically achievable but executed to an exceptional standard. You...
IR35 Status:
Outside IR35

CV-Library City of London, Greater London Contractor
CL
Feb 14, 2026  
BMS Service Engineer
We have a fantastic opportunity for a proficient BMS Service Engineer to join a well-established building controls business working on multiple contracts in London on a contract basis. This contract position offers an excellent hourly rate paid weekly ( outside IR35) Company Profile Our client is a household name in the world of BMS providing full turnkey solutions to the Building Energy Management sector since the late 90’s. With their wealth of expertise, they are able to secure projects of all size and type and deliver a best-in-class service from design all the way to end user handover. The Role of the BMS Service Engineer As a BMS Service Engineer you will be responsible for the pre-planned and reactive maintenance of Building Management Systems, predominantly across London. You will have in-depth knowledge of BMS (Building Management Systems) hardware including fault finding, wiring and networking. You will possess the knowledge and experience to be involved with small...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Dec 28, 2025  
Senior Electrical Design Engineer
We are working with a leader in the hyper scale global data centre space -their portfolio includes hyperscale facilities for global tech giants, multi-megawatt data halls, and cutting-edge colocation sites. This is an opportunity to work with a team that sets the benchmark for technical excellence and innovation in the data centre sector. The data centres are at stage two and three so a good time to become involved. The position is as a Senior or Principal Electrical Engineer, you will play a key role in designing and delivering complex electrical systems for large-scale data centres collaborating with multidisciplinary teams to ensure resilient, high-performance solutions for some of the most advanced facilities in the industry. What you'll need to succeed Strong experience in HV, LV, generators, and UPS systems, or a willingness to learn and develop in these areas. Proven background in electrical design within building services. Ability to manage projects and mentor...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Mar 20, 2026  
Software Test Automation Engineer
Software Test Automation Engineer Remote £competitive outside IR35 rate Contract Test, Quality Assurance, ISTQB, Selenium, Cypress, Playwright, Azure Devops, Postman Our client are seeking an experience Test Engineer/Test Automation professional to preside over business-wide test activities - test automation and API testing will be in amongst the main duties of the role. We are looking for a proactive Quality Assurance professional to drive higher software standards through shift-left testing and early requirement analysis. You will plan, design, carry out tests in alignment and conjunction with existing technical and business teams and be the champion of Quality and seamless UAT throughout the business. Key Tools * Selenium, Cypress, Playwright, Postman, Azure DevOps Test Plans, Jira + Zephyr/Xray, TestRail, HP ALM. Test Automation * Knowledge of test automation frameworks (eg, Selenium, Cypress, Playwright). * Understanding of CI/CD integration for automated tests (Azure...
IR35 Status:
Outside IR35

CV-Library SW1A, Westminster Abbey, Greater London Contractor
CL
Mar 15, 2026  
Senior Civil Design Engineer
Job Title: Civil Engineer - Water Rate: £35 to £45 per hour (Outside IR35) Location: Slough Type: Contract | Outside IR35 | Hybrid working About the Role: Our client is seeking an experienced Civil Engineer with strong UK water sector experience to support the delivery of complex infrastructure and non-infrastructure projects. This is a contract opportunity operating outside IR35, offering long-term project stability and hybrid working. You will provide hands-on technical expertise across the full project lifecycle, supporting design, coordination, and delivery on critical water industry schemes. About Our Client: Our client is a well-established UK engineering consultancy with a strong presence in the water sector. They are recognised for delivering technically robust, sustainable solutions and for working collaboratively with contractors, clients, and stakeholders across major programmes. Key Responsibilities: Project Delivery Support and deliver water sector projects...
IR35 Status:
Outside IR35

CV-Library Slough, Berkshire Contractor
CL
Mar 19, 2026  
E&I Package Manager
Project Manager / E&I Package Manager Rate: £65 per hour Outside IR35 Our global EPC client is looking for a Project Manager / E&I Package Manager who possesses significant experience in electrical engineering. The successful candidate will be responsible for the delivery of the major electrical packages for a significant 'normally unattended' Greenfield facility. The project also comprises brownfield aspects requiring interface engagement. The successful candidate will be the focal point between the Client's PMT and the KBR PMT, procurement and engineering teams. The main packages include VFD driven Compressors and main Electrical equipment such as 110kV switchgear, transformers, switchgear, VSD etc. The successful candidate will be looking across those major packages to drive the multi-functional delivery of the RFQ process, including integrating with the construction team on ROS dates, build sequence etc and facilitating stakeholder buy-in. You will be supporting...
IR35 Status:
Outside IR35

CV-Library Leatherhead, Surrey Contractor
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