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
Refine by Categories
Engineering 22 Construction 5 Automotive 4 Information Technology 3 Finance 2
Outside IR35 Contractor senior systems engineer

33 senior systems engineer jobs found

CL
Jul 31, 2026  
Senior Avionic Systems Engineer
Senior Avionic Systems Engineer Location: Shaftesbury, Dorset – On site initially Duration: Initial 6–12 month contract Rate: £60 – 70 ph Ltd Outside IR35 Overview We are seeking an experienced Senior Avionic Systems Engineer to join a dynamic engineering team supporting the development, integration and certification of advanced airborne systems. This role offers the opportunity to work on cutting-edge aerospace programmes, contributing across the full systems engineering lifecycle. The successful candidate will have extensive experience in avionics systems engineering within the aerospace or defence sector. Experience with avionics navigation systems is highly desirable. Key Responsibilities • Lead systems engineering activities throughout the full product lifecycle, from requirements capture through to verification and validation. • Develop and manage system requirements, architectures and interface definitions. • Produce and maintain systems...
IR35 Status:
Outside IR35

CV-Library Shaftesbury SP7, UK Contractor
CL
Aug 07, 2026  
EC&I Engineer
Senior EC&I Engineer Contract | UK | Outside IR35 / Ltd Company Contractors Considered Our client is looking to appoint an experienced Senior EC&I Engineer on a contract basis to support a programme of work surveying industrial gas distribution systems across multiple UK sites and producing high-quality engineering documentation. This is an excellent opportunity for an experienced engineer with a strong background in industrial automation, PLC systems and EC&I design who enjoys a mix of office-based engineering and occasional site work. The Role Working as part of an experienced engineering team, you will undertake site surveys before producing accurate as-built engineering documentation for existing control and automation systems. Typical deliverables will include: I/O Schedules System & Network Architecture Drawings Cause & Effect Diagrams High-Level Control Narratives Engineering documentation updates and verificationThe role is predominantly...
IR35 Status:
Outside IR35

CV-Library Stockton-on-Tees, UK Contractor
CL
Aug 07, 2026  
Senior Design Civil Engineer
Senior Design Civil Engineer – Water  Location: St Albans (Hybrid) Contract Type: Long-term Contract (Outside IR35) Our client, a specialist engineering design consultancy within the water sector, is seeking an experienced Senior Design Civil Engineer to support the delivery of water and wastewater infrastructure projects. This is an excellent opportunity to join a growing team, working across multidisciplinary projects from concept through to detailed design. You will be responsible for developing practical, efficient, and compliant engineering solutions while providing technical guidance to junior team members and collaborating with clients and stakeholders. Key Responsibilities Produce engineering design deliverables that meet safety, quality, and regulatory requirements. Develop practical solutions from project scopes, technical assessments, and site investigations. Communicate technical solutions effectively with clients, stakeholders, and project teams. Support and mentor...
IR35 Status:
Outside IR35

CV-Library St Albans, UK Contractor
CL
Aug 06, 2026  
Senior Civil Engineer
Senior Civil Design Engineer £38 to £55 per hr Outside IR35 Reading Hybrid working available Our client is an award winning multi disciplinary design consultancy who are based near Reading. The are looking to recruit a Civil Design Engineer who has experience of Drainage Design on a wide range of residential and commercial type projects. The right candidate will undertake tasks designing infrastructure for commercial, retail, residential and industrial sectors. Civil Engineer Job Overview • Design of infrastructure for commercial, retail, residential and industrial sectors including SUDS drainage systems, roads to adoptable & DMRB standards. • Liaison with statutory bodies such as Southern & Thames Water, Roads Department, local drainage authorities. • Attend design meetings, site meetings and carryout site inspections. • Liaise and communicate clearly in a professional manner to colleagues, clients, contractors and other designers and to offer advice and...
IR35 Status:
Outside IR35

CV-Library Reading, UK Contractor
CL
Aug 05, 2026  
Contract Software Engineer (Java & Kotlin)
Senior Java & Kotlin Backend Engineer Location: London (Hybrid - Wednesday office attendance required) Contract: Initial 2 months IR35: Outside IR35 Start Date: ASAP The Role We're working with a leading technology organisation seeking an experienced Senior Java & Kotlin Backend Engineer to join their engineering team on an initial two-month contract. This role offers the opportunity to contribute to greenfield backend development, building scalable, cloud-native microservices within a modern engineering environment. You'll work alongside cross-functional teams to design, develop and deliver high-quality backend solutions that are secure, reliable and built for scale. Key Responsibilities Design, develop and maintain backend services using Java and Kotlin. Build and enhance RESTful APIs within a microservices architecture. Develop secure, scalable and high-performance applications. Collaborate with Product Managers, Engineers and technical stakeholders to deliver...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Aug 05, 2026  
Senior Mechanical Design Engineer
Senior Mechanical Engineer - Water Sector St Albans: Hybrid (3 Days Office) Contract: £45-£50/hr (Outside IR35) Advance TRS are supporting a rapidly growing consultancy in their search for a Senior Mechanical Engineer. Joining a newly formed London business unit, you'll have the unique opportunity to help build a team from the ground up, influence how projects are delivered, and play a significant role in the future growth of the business within the UK water market. You'll lead the mechanical design of clean water and wastewater projects, producing high-quality engineering solutions while mentoring junior engineers and coordinating multidisciplinary design teams. Key Responsibilities: * Deliver mechanical design solutions for water and wastewater projects * Produce calculations, reports, specifications and design drawings * Lead and review work from junior engineers and CAD technicians * Coordinate with suppliers, manufacturers and subcontract design teams * Ensure designs...
IR35 Status:
Outside IR35

CV-Library Hertfordshire, UK Contractor
CL
Aug 05, 2026  
Senior EC&I Engineer
Senior EC&I Engineer Nuclear Manufacturing Company | Near Manchester Up to £51.40 per hour | Outside IR35 4-Day Working Week (4 x 10-hour days) A specialist nuclear manufacturing company near Manchester is looking for a Senior EC&I Engineer to support the design and delivery of complex engineering projects within a highly regulated environment. This role will involve working on specialist systems and equipment, including gloveboxes and similar containment solutions, supporting projects from concept through to manufacture and commissioning. Key Responsibilities Deliver EC&I design activities across concept, scheme and detailed design stages Produce and support technical documentation for UKCA / CE Marking compliance Ensure designs meet applicable safety standards and engineering regulations Support multidisciplinary engineering teams throughout project delivery Provide technical support during manufacture, testing and commissioning What We're Looking For Strong...
IR35 Status:
Outside IR35

CV-Library Preston, Lancashire Contractor
CL
Aug 01, 2026  
Senior Mechanical Design Engineer
Contract position Outside IR35 On-site/Hybrid working Our client, specialises in Zero-Emission Aerospace development is seeking a highly skilled Senior Mechanical Design Engineer to create, own, and maintain complex mechanical designs and CAD data. Proven Aerospace experience is Essential Fuel cell related development is Desirable Key Responsibilities: CAD Design & Ownership: Full ownership of CAD design and associated data for assigned components and assemblies Create detailed 3D CAD models of complex parts and assemblies (NX preferred) Produce high-quality 2D production drawings conforming to ASME standards and all applicable regulatory requirements Maintain CAD and engineering assets within the PLM system (Teamcenter or similar) Provide CAD design solutions for technical challenges across multiple projectsEngineering & Analysis: Apply strong understanding of GD&T, materials, finishes, and manufacturing processes Use knowledge of stress analysis principles to...
IR35 Status:
Outside IR35

CV-Library Gloucestershire, UK Contractor
CL
Aug 01, 2026  
Senior Design Engineer - Driveline and Transmissions
A contract position Outside IR35 Hybrid working in Warwickshire Senior Design Engineer (Driveline and Transmissions) for a contract position. Proven Mechanical Design experience on Automotive Transmission and Driveline Components is essential. Key Responsibilities: Designing mechanical components through concept, definitive, and detail design phases. Conducting detailed mechanical design work including 3D modelling, basic stress calculations, FMEA's, 2D layouts, 2D detailing, and tolerance stacks. Agreeing design approaches with the project Chief or Lead Designer. Creating 2D drawings for manufacture or purchase, assembly drawings, and bills of materials. Ensuring design meets system and component specifications, along with fit and function within other systems. Collaborating with manufacturing and process engineers to ensure products are designed for manufacture and assembly. Reporting progress on assigned tasks to the project management teams, chief designer, or engineering...
IR35 Status:
Outside IR35

CV-Library Warwickshire, UK Contractor
CL
Jul 31, 2026  
Senior / Principal C&I Engineer
Senior / Principal C&I Engineer – Contract Location: West Wales This is an excellent opportunity to join a leading engineering business during a period of continued growth as they support the Oil & Gas, Petrochemical, Renewable Energy, and Hydrogen sectors. TUV Certified status would be a bonus, though not essential. Role & Responsibilities * Undertaking work providing Process Engineering support to a range of CAPEX and OPEX projects. * Performing safety specification and certification of safety instrumented systems. * Carry out SIL Verification using simplified equations. * Undertake design and checking of deliverables according to discipline and area of expertise. * Checking the quality of design work to ensure compliance with agreed client design specifications. * Preparation and checking of deliverables including drawings, schedules, datasheets, specifications, (input to control philosophies and narratives if applicable). * Development of C&I...
IR35 Status:
Outside IR35

CV-Library United Kingdom Contractor
CL
Jun 28, 2026  
Senior HVAC Design Engineer
Data Centres are crucial components of today's infrastructure, supporting everything from business to public services. 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 a Senior Mechanical Engineer your role will be as part of an interdisciplinary team lead the design of mechanical systems (Building servies and cooling) on medium to large-scale Mission Critical projects through all design stages from Concept to Construction Supervision and Hand-Over Lead the preparation and review of design deliverables Lead projects and work closely with our data centre clients to deliver quality work to meet their specific needs Present technical content for review by technical and non-technical...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jun 17, 2026  
Senior Electrical Design Engineer
Working with this busy engineering solutions provider who have a strong order book with schemes across the TFL estate - they are looking for an Electrical Design Engineer to join there multi-disciplinary design team Your role will involve: - Creating LV electrical designs for station work, including lighting and power systems. - Problem-solving to integrate new designs with legacy infrastructure. - Working closely with the wider design and CAD teams. The position is ideally suited for someone who: - Is an experienced practically minded electrical design engineer - Understands the practical challenges of electrical installation and buildability. - Can problem-solve on the spot when faced with non-standard site issues. You should have experience in RAIL/ LU (TFL) Standards Role is outside IR35 Your expert recruitment consultant is Trevor Parsons, call today on (phone number removed) or email (url removed) Eden Brown is committed to equality in the...
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
Aug 07, 2026  
System Requirements Engineer
A Contract Outside IR35 Hyrbrid working - Miniumum 3 on site Proven Aerospace experience Essential and experience of requirements processes under ARP4754B Our client, a key player in the aerospace sector, is currently seeking a System Requirements Engineer for a critical contract position. This role involves owning the capture, quality, and traceability of requirements at both system and equipment levels for the fuel cell system, acting as a standard-bearer for requirements engineering best practices across the engineering organisation. This is a pivotal position supporting the delivery of certified, zero-emission aircraft propulsion systems. Responsibilities: Elicit, derive, and author requirements at aircraft-interface, system, and equipment levels, working from certification basis, customer, safety, and architectural inputs. Write and maintain requirements to defined quality criteria (singular, unambiguous, verifiable, traceable), applying structured authoring patterns and...
IR35 Status:
Outside IR35

CV-Library Gloucestershire, UK Contractor
CL
Aug 06, 2026  
Electrical Bias Maintenance Engineer
Electrical Bias Maintenance Engineer | £35.00 - £37.00p/h (outside IR35) Leeds Wakefield Selby Pontefract Bradford Are you an experienced Electrical Bias Maintenance Engineer with a strong background in fast-paced manufacturing, looking for a stable, long-term opportunity? Do you enjoy varied, hands-on fault-finding one day and planned maintenance the next? My client is one of the UK's leading and longest-established equipment manufacturers, working with customers across the country to deliver innovative, cost-effective and reliable packaging solutions. Backed by an experienced team and award-winning processes, they have built a reputation for quality and reliability that sets them apart in the sector. Take Ownership of Day-to-Day Maintenance Across the Site This is a varied role covering the full spread of maintenance activity across the site's semi-automatic packaging lines - from reactive breakdown response and fault-finding through to planned preventative maintenance (PPM)...
IR35 Status:
Outside IR35

CV-Library West Yorkshire, UK Contractor
CL
Aug 06, 2026  
Network & Systems Integration Engineer - Outside IR35
Location: Basildon (3-5 days per week onsite) Duration: 6 month contract Rate: £73.40ph LTD (Outside IR35) Role details: Our client, a leader in the Defence & Security sector, is currently seeking a Network & Systems Integration Engineer to join their team in Basildon on a contractual basis. Key Responsibilities: Creating Network Architecture for the Lab environment Maintaining Lab infrastructure and development areas Configuring systems according to Lead Systems Engineer requirements Supporting Trials Site activities Job Requirements: We are looking for a candidate with recent experience of TSN (Time Sensitive Networking), DDS and VLAN Configuration. Experience in IT Network and its applications within Defence & Security Understanding of the Open Systems Interconnection Model Understanding of IPv4 Addressing Understanding of Virtual Local Area Network configuration Understanding of Network Implementation and Deployment Understanding of Network Architecture...
IR35 Status:
Outside IR35

CV-Library Basildon, Essex Contractor
CL
Aug 06, 2026  
DevOps Engineer - DV Cleared
JOB TITLE: DevOps Engineer - DV Cleared Rate: £550-£600/day (Outside IR35) Location: Onsite Clearance: DV Cleared (Mandatory) Flexible Work Option: Condensed working week (e.g., 3 long days, paid for 5) Job Summary We are seeking a technically skilled DevOps & Software Engineer with DV clearance to contribute across the full software development lifecycle and DevOps toolchain. You will design, implement, and maintain scalable, secure, and automated CI/CD pipelines, infrastructure-as-code (IaC), and system monitoring frameworks to support the continuous delivery of secure and reliable software. This role demands a strong grasp of modern DevOps practices, cloud and container technologies, automation tooling, and software engineering principles. You will work closely with development, security, and operations teams to drive a culture of DevSecOps and continuous improvement. Key Responsibilities Design, build, and maintain scalable CI/CD pipelines using modern DevOps...
IR35 Status:
Outside IR35

CV-Library Worcestershire, UK Contractor
CL
Aug 05, 2026  
Embedded Software Engineer
A contract Outside IR35 Hybrid - Must be able to do 3 days on site Full lifecycle Embedded C to MISRA development - Aerospace, DO178B/C, Model-Based development. Our client, a key player in the aerospace sector, is currently searching for an Embedded Software Engineer to join their team on a contract basis. This role presents a unique opportunity to work on cutting-edge aerospace projects, focusing on developing and integrating software for advanced controller platforms. Key Responsibilities: Develop embedded software for our controller platform. Produce requirements, design, implementation, and tests for software components. Ensure software life cycle data is produced in accordance with development processes and procedures. Perform hardware/software integration for debugging, verification, and release of software. Contribute improvements to internal procedures and standards. Job Requirements: Bachelor's degree in a related engineering discipline (or equivalent knowledge and...
IR35 Status:
Outside IR35

CV-Library Gloucestershire, UK Contractor
CL
Aug 05, 2026  
Firmware Engineer
Contract Details Job Title: Firmware Engineer Duration: 8 months (initially) Location: Hybrid (3 days per week), Reading Outside IR35 £50-£60 per hour SC eligibility required Key Responsibilities Design and develop embedded firmware for advanced radar systems, supporting the full product lifecycle from concept through to integration, verification and production. Develop firmware for FPGA-based and embedded processing platforms using C/C++ and Verilog, interfacing with high-speed digital electronics, sensors and communication protocols. Perform firmware integration, debugging and verification using laboratory equipment including oscilloscopes, logic analysers, JTAG debuggers and protocol analysers, ensuring compliance with system and performance requirements. Collaborate with systems, hardware, software and test engineers to investigate issues, perform root cause analysis and deliver robust firmware solutions for mission-critical defence applications. Essential Skills...
IR35 Status:
Outside IR35

CV-Library Reading, Berkshire Contractor
CL
Aug 05, 2026  
Principal Mechanical Enigneer
Principal Mechanical Engineer - Water Sector St Albans: Hybrid (3 Days Office) Contract: £55-65p/h (Outside IR35) Advance TRS are supporting a rapidly growing consultancy in their search for a Principal Mechanical Engineer. Joining a newly formed London business unit, you'll have the unique opportunity to help build a team from the ground up, influence how projects are delivered, and play a significant role in the future growth of the business within the UK water market. You'll lead the mechanical design of clean water and wastewater projects, producing high-quality engineering solutions while mentoring junior engineers and coordinating multidisciplinary design teams. Key Responsibilities: * Deliver mechanical design solutions for water and wastewater projects * Produce calculations, reports, specifications and design drawings * Lead and review work from junior engineers and CAD technicians * Coordinate with suppliers, manufacturers and subcontract design teams * Ensure...
IR35 Status:
Outside IR35

CV-Library Hertfordshire, 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