Freelancer UK
  • All Jobs
  • Outside IR35
  • Agencies
  • Post a Job
  • Pricing
  • Guides
  • Sign in
  • Sign up
  • All Jobs
  • Outside IR35
  • Agencies
  • Post a Job
  • Pricing
  • Guides

Email me jobs like this

Email me jobs like this
Refine Search
Search within
50 miles
10 miles 20 miles 50 miles 100 miles 200 miles
Refine by IR35 Status
Unknown Status 101 Inside IR35 39 Outside IR35 21
Refine by Categories
Engineering 79 Construction 39 Information Technology 18 Management 6 Manufacturing 6 Other 5
Automotive 4 Admin-Clerical 3 Customer Service 2 Marketing 2 Facilities 1 General Labor 1 Government 1 Media-Journalism 1 Sales 1 Science 1
More
Refine by Job Type
Contractor 161
mechanical engineer London

161 mechanical engineer jobs found in London

CL
May 23, 2026  
Mechanical Engineer
Job Title: Intermediate/Senior Mechanical Engineer - 12 Month Contract or Permanent Location: Mostly remote (occasional travel to London) Contract Rate: £45-£53 per hour outside IR35 or Permanent Salary: £50-£60k About the Role: We are seeking an experienced Mechanical Engineer to join a dynamic team focused on innovative engineering solutions in the water and environmental sector. This role offers the flexibility of primarily remote work, with occasional visits to the London office, and provides the opportunity to work on cutting-edge projects in a collaborative environment. Key Responsibilities: Design, develop, and optimise mechanical systems and components. Prepare detailed engineering drawings, specifications, and documentation. Work closely with project teams to deliver solutions from concept through to installation and commissioning. Support project planning, risk assessment, and troubleshooting mechanical issues. Ensure compliance with relevant industry standards,...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
May 23, 2026  
Principal Mechanical Engineer
Principal Mechanical Engineer Remote with occasional visits to the office Location - Manchester OR London OR Newcastle OR Glasgow Contract role - 6 months rolling Inside IR35 - £65 / hour Umbrella A Principal Mechanical Engineer is required to join a design consultancy on a 6-month rolling contract. The role is remote, but you MUST be willing to occasionally travel to either Manchester, London, Newcastle or Glasgow (dependent on your location). This role will be working in the Energy Transition industry working on low-carbon projects from early-stage development through construction, operation and eventual decommissioning. Responsibilities Developing cost-effective, practical mechanical engineering solutions to complex problems Producing calculations, equipment specifications and datasheets for turbines, compressors, pumps, pressure vessels and heat exchangers Collaborating with process engineers on PFDs and P&IDs Supporting plant layout development and 3D model reviews...
IR35 Status:
Inside IR35

CV-Library London, UK Contractor
CL
May 21, 2026  
Mechanical Engineer
Mechanical Engineer, Contract basis, long-term (Ongoing). Design and Build M&E Building Services Contractor. Site Based, Central London. Mixed use projects; Residential and Commercial Weekly paid via agency Required Qualifications & Experience: * Previously held a building mechanical services engineer’s role within a contracting/sub- contracting construction business. * Very strong practical and design knowledge of building mechanical services * Good commercial awareness * Appropriate level Mechanical Engineering Qualifications * Full UK Working entitlement Responsibilities; * Engineering of single or multiple projects from tender to design development, procurement, construction, handover and defect liability stages * Liaising closely with other professionals, incl. structural engineers, builders, architects and surveyors, in-house project teams * Working with the estimating team to produce successful tender bids * Development of Consultants...
IR35 Status:
Unknown Status

CV-Library Hackney, Greater London Contractor
CL
May 22, 2026  
Principal Mechanical Engineer
PRINCIPAL MECHANICAL ENGINEER - LOW CARBON A little more about your role: We are seeking a Principal Mechanical Engineer to join our Energy Transition Team. Working as part of a large engineering group you will lead the development of Mechanical designs on a wide range of Energy projects from initial inception through development, construction, operation and decommissioning. Projects include; conventional power plant, energy from waste plants, industrial facilities and carbon capture schemes. Our team's expertise covers all thermal generation and conversion technologies and includes novel, first of a kind concepts and other low or zero carbon technology such as future fuels and carbon capture, utilisation and storage. Working together with private developers, power utilities, government bodies, banks, lending agencies, contractors and OEMs we safely deliver projects whilst meeting and exceeding client expectations. You should be experienced in the delivery of concept, FEED and...
IR35 Status:
Unknown Status

CV-Library Peninsula Square, London SE10 0DX, UK Contractor
CL
May 13, 2026  
Mechanical Engineer
We are looking for a Mechanical Engineer to join the team of an established FM company in the Tooting area. This role is offering a temporary position and the opportunity to gain experience in a reputable, recognised company. Mechanical Engineer Monday to Friday/ 40 hours Temp to perm Tooting £24-25ph paid weekly via umbrella Perm salary = £38k As a Mechanical Engineer, you will be: * Carrying out ppm works and maintenance testing on the mechanical systems * Trouble shooting and fault finding * Maintenance of AHU/ FCU's, filter changes etc * Responsible for reactive and breakdown repairs * Plumbing repairs and pipe work To be successful as a Mechanical Engineer, you will need: * NVQ level 3 or level 2 plus experience * Experience in Mechanical bias, Plumbing engineer, M&E engineer, M&E engineer, commercial eplumber, Multiskilled engineer role If this role is of interest, please apply directly to this advert
IR35 Status:
Unknown Status

CV-Library Tooting, Greater London Contractor
CL
May 07, 2026  
Mechanical Project Engineer
We are looking for an exceptional and very technically strong Mechanical Building Services Project Engineer with experience of working on large size multi-unit residential and mixed use residential/commercial developments. This is a long term contract position based in Central London, SE1. Our client is a specialist M&E Contractor. This role is with the established Mechanical arm of the business. The position reports to the Contract Director. You will be responsible for overseeing Mechanical Building Services Engineering on the Project. We are looking for a practically minded and technically strong Engineer who can liaise effectively with the consultant, client and on site teams, and maintain a calm and pragmatic approach to ensure the technical success of Mechanical Building Services Installation. This is an Engineer not a Project Manager role although is a comparable level within the company structure. We are looking for a Technical, site-based Mechanical Engineer who knows...
IR35 Status:
Unknown Status

CV-Library SE1, Chaucer, Greater London Contractor
CL
Apr 02, 2026  
Mechanical Design Engineer
World Class Defence Organisation is currently looking to recruit a Mechanical Design Engineer (Military Packaging Design) subcontractors on an initial 12 month contract. This role would suit a Mechanical Design Engineer who comes from a strong Defence or Aerospace background has strong Creo / PRO-E skills.  Other CAD Package skills are also fine.         Job Title:  Mechanical Design Engineer Rate: £50.00 per hour Location: Stevenage Hybrid / Remote working: Hybrid, 2-3 days min on site. Although this can change due to workload. Can be continually reviewed. 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) 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...
IR35 Status:
Inside IR35

CV-Library Stevenage, UK Contractor
CL
Mar 04, 2026  
Mechanical Design Engineer (Military Packaging Design)
World Class Defence Organisation is currently looking to recruit a Mechanical Design Engineer (Military Packaging Design) subcontractors on an initial 12 month contract. This role would suit a Mechanical Design Engineer who comes from a strong Defence or Aerospace background has strong Creo / PRO-E skills.         Job Title:  Mechanical Design Engineer Rate: £50.00 per hour Location: Stevenage Hybrid / Remote working: Hybrid, 2-3 days min on site. Although this can change due to workload. Can be continually reviewed. 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) Mechanical Design Engineer - Military Packaging Design 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...
IR35 Status:
Inside IR35

CV-Library Stevenage, UK Contractor
CL
May 22, 2026  
Mechanical Project Engineer
Position Mechanical Project Engineer (Shell & Core) LocationWest London Type High End Resi Rate £350-£400pd Company M&E Leading Construction & Engineering business, consistently delivery high end residential and commercial projects across Europe & the UK. Specialising in design, and installation of Mechanical & Electrical. Role 6-8-month high end residential project within Mayfair London, this is for the entire shell & core of the project. Work will be on site everyday: 8 -5 / 37.5hr week Package £350 - £400pd MUST HAVE: CSCS Card Relevant mechanical industry qualifications 3+ years Residential experience Tier 1 Main Contractor experience Interested? Apply with your most up to date CV (url removed) Important Information: We endeavour to process your personal data in a fair and transparent manner. In applying for this role, Russell Taylor will be acting within your interest and will contact you in...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
May 23, 2026  
Mechanical Design Engineer
World Class Defence Organisation is currently looking to recruit a Mechanical Design Engineer subcontractors on an initial 6 month contract. This role would suit a Mechanical Design Engineer who comes from a strong Defence or Aerospace background has strong Creo / PRO-E skills.         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...
IR35 Status:
Inside IR35

CV-Library Stevenage, UK Contractor
CL
May 23, 2026  
Mechanical Design Engineer
Job Title: Mechanical Design Engineer Location: Stevenage 4 days on-site per week Role Type: Contract Duration: Initial 6 months+ Rate: £50.00 per hour - Inside IR35 Our client, an established defence manufacturer, require an experienced Mechanical Design Engineer to join their multi-disciplined team in Stevenage. UK citizenship is mandatory to be able to clear the background checks and obtain SC clearance. Current valid SC clearance would be an advantage. What the role of the Mechanical Design Engineer entails: Carry out Mechanical Design and proving activities as part of a wider team for prime and variant products, of both piece parts and assemblies. Support/liaise with manufacturing, resolving manufacturing problems & defects. Support to functional & environmental testing and trials. Liaise with suppliers/purchasing to resolve any technical queries that may arise. Planning and reporting on own day-to-day activities to meet project milestones. Gain clarification...
IR35 Status:
Inside IR35

CV-Library Stevenage, Hertfordshire Contractor
CL
May 23, 2026  
Principal Mechanical Design Engineer
Our client, a leading player in the Defence & Security sector, is currently seeking a Principal Mechanical Design Engineer to join their team on a contract basis. The role involves collaborating with functional teams to develop products that meet customer requirements and engaging in cutting-edge research of novel mechanical technologies. Key Responsibilities: Carry out Mechanical Design and proving activities for prime and variant products, including piece parts and assemblies. Support and liaise with manufacturing, resolving problems and defects. Support functional and environmental testing and trials. Communicate with suppliers and purchasing to resolve technical queries. Plan and report on day-to-day activities to meet project milestones. Gain clarification of and generate requirements, challenging extraneous requirements to reduce lead time, cost, and design complexity. Job Requirements: Experience using Creo 3D design tool. Understanding of manufacturing processes,...
IR35 Status:
Unknown Status

CV-Library Stevenage, Hertfordshire Contractor
CL
May 23, 2026  
Mechanical Design Engineer
Mechanical Design Engineer required for long term contract based out of Stevenage or Bristol. 4 days on site 1 remote. Skillset/experience required: Experience using Creo 3D design tool Knowledge of several of the following: Manufacturing processes Tolerance studies Environmental test Mass property calculations Material selection FMEA Design for Manufacture/Assembly Environmental Gasket Sealing Tooling/fixtures design Structural design Defence Standards Review processes Product Lifecycles Industrial validation An ability to work as part of a multifunctional engineering team and be able to partake in or host design reviews. An appreciation of other engineering areas/domains. Responsibilities: Carry out Mechanical Design and proving activities as part of a wider team for prime and variant products, of both piece parts and assemblies. Support/liaise with manufacturing, resolving manufacturing problems & defects. Support to functional & environmental testing and trials....
IR35 Status:
Unknown Status

CV-Library Stevenage, Hertfordshire Contractor
CL
May 22, 2026  
Tooling Maintenance Technician
Tooling Maintenance Technician Location: Worthing Pay: Up to £16.77 per hour Temp to perm position Hands-on, shop-floor role working with toolmakers, engineers, and maintenance teams. Responsible for stripping, cleaning, inspecting, and rebuilding tooling to keep production running reliably.   Requirements: Mechanical / maintenance engineering or toolmaking background Experience in precision mechanical work Practical, detail-focused, team player Experience as a mechanical engineer, maintenance engineer, toolmaker or ex-toolmaker would be beneficial  Methodical, and thorough in approach
IR35 Status:
Unknown Status

CV-Library Worthing, UK Contractor
CL
May 23, 2026  
Electronics / Firmware Engineer
Contract Senior Electronics / Firmware Engineer – Sensor Expertise Rate: £400–£425 per day + VAT IR35 Status: Outside IR35 Location: Greater London (3-4 days on site per week min) Contract Length: 3–6 months, with potential extension We’re working with an innovative technology business at the forefront of advanced sensing solutions, seeking a Senior Electronics / Firmware Engineer to support the development of next-generation products. This is an opportunity to join a highly collaborative, multidisciplinary team delivering cutting-edge solutions with real-world impact. In this role, you’ll take ownership of sensor characterisation and optimisation, with a particular focus on humidity and temperature sensing technologies. You’ll play a key part in refining performance, reliability, and integration within sophisticated systems, contributing directly to product development from concept through to validation. This is a hands-on engineering role suited to someone who enjoys...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
May 16, 2026  
Senior Electrical Design Engineer
An excellent opportunity has arisen for an experienced Electrical Design Engineer to join a well-established building services consultancy in London on an contract basis outside IR35. This hybrid role will involve working as part of a multidisciplinary building services engineering team, supporting the delivery of electrical design solutions across a range of building projects. The successful Electrical Design Engineer will contribute to the development of electrical building services designs, technical documentation and coordinated BIM models. This role is based in the London office with hybrid working available, offering the chance to work on high-quality building services projects alongside experienced engineers and consultants. Key Responsibilities · As an Electrical Design Engineer, your responsibilities will include: · Producing electrical building services designs for a variety of building projects · Developing electrical schematics, layouts and...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 16, 2026  
Senior Electrical Design Engineer
An excellent opportunity has arisen for an experienced Electrical Design Engineer to join a well-established building services consultancy in London on an contract basis outside IR35. This hybrid role will involve working as part of a multidisciplinary building services engineering team, supporting the delivery of electrical design solutions across a range of building projects. The successful Electrical Design Engineer will contribute to the development of electrical building services designs, technical documentation and coordinated BIM models. This role is based in the London office with hybrid working available, offering the chance to work on high-quality building services projects alongside experienced engineers and consultants. Key Responsibilities · As an Electrical Design Engineer, your responsibilities will include: · Producing electrical building services designs for a variety of building projects · Developing electrical schematics, layouts and...
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
May 21, 2026  
Night Shift Engineer
Multiskilled Maintenance Engineer (Night Shift) Are you a night owl who thrives on independence and technical variety? We are looking for a reliable, Multiskilled Maintenance Engineer to join a premier commercial site in the heart of London. This is a Temp-to-Perm opportunity, offering the chance to prove your skills before securing a long-term role. The Package Rate: Up to £27 per hour (Experience dependent). Shift Pattern: Continental Shifts (Nights Only). Contract: Temp-to-Perm (Typically 12 weeks via agency before moving to staff). Environment: High-end commercial corporate building. The Role Working within a high-spec commercial environment, you will be the "go-to" person during the night hours, ensuring the building remains operational and safe for the following business day. Your responsibilities will include: Planned Preventative Maintenance (PPM): Executing scheduled checks on AHUs, FCUs, pumps, and motors. Reactive Tasks: Responding swiftly to plant failures,...
IR35 Status:
Unknown Status

CV-Library City of London, London Contractor
CL
Apr 03, 2026  
Pipe Stress Engineer
Pipe Stress Engineer Location - Leatherhead Work pattern – 4 days office – 1 day remotely. Rate - £60 p/hr – Outside IR35 Duration – 6 months Start - ASAP Job Responsibilities: During Detail Engineering, perform Piping Stress Analysis of high temperature piping systems using a combination of practical experience and commercially available software. Implement project specifications. Work as part of a team to ensure Isometrics are being checked in a timely manner Ensure a consistent and compliant approach to project execution. FEA Analysis of specialist piping components. Analysis of new and existing piping systems on Greenfield and Brownfield Projects. Work individually or as part of a team in the home office and abroad. Communicate effectively with other engineering disciplines. Committed to multi-centre project execution. Adhere to the companies WAY engineering standards and procedures as well as provide input to their development and enhancement. Skills / Experience:...
IR35 Status:
Outside IR35

CV-Library Leatherhead, UK Contractor
  • Follow us on:
  • Facebook
  • Twitter
  • Instagram
  • LinkedIn
  • Home
  • Contact
  • About Us
  • Terms & Conditions
  • Employer
  • Post a Job
  • Search Resumes
  • Sign in
  • Job Seeker
  • Find Jobs
  • Outside IR35
  • Create Resume
  • Sign in
© 2008-2026 Powered by SmartJobBoard Job Board Software