1 to 25 of 28 Contract Principal Engineer Jobs in the UK

Principal Engineer Hybrid Working - London - 2 days a week on site. Financial Services Lorien's leading banking client is looking for a strong Principal Engineer to join a high-profile transformation programme delivering a next-generation cloud-native customer onboarding platform. This is a hands … stakeholders to ensure successful programme delivery. Drive production readiness through observability, resilience, automated testing, and secure engineering practices. Key Skills Experience operating as a Principal Engineer, Staff Engineer, or equivalent senior technical leader . Strong hands-on development experience with Python and/or Java. Expertise ...

Cleared Principal Platform Engineer - Platform Security & Infrastructure Location: Yeovil (Onsite) Rate: £680 - £713 per day (Inside IR35) Contract: 12 Months Working Pattern: Full-time or condensed week available (work 3 long days and get paid for 5) Security Clearance: Active UK Developed Vetting (DV) Clearance required Principal Platform Engineer - Secure Platforms | Defence & National Security We're seeking an experienced DV Cleared Principal Platform Engineer to join a high-profile programme delivering secure, mission-critical platforms supporting defence, government, and national security operations. This is an opportunity to work at the forefront of platform ...

Principal Infrastructure Engineer +6 months + +DV cleared role - current active clearance is essentia l +Inside IR35 + 700 - 725 a day +On site in Yeovil We are seeking an experienced Principal Infrastructure Engineer to lead complex infrastructure projects and drive innovation within our organisation. This … access models across complex systems Delivery within highly controlled/secure environments (e.g. air-gapped, defence). If you'd like to discuss this Principal Infrastructure Engineer role in more detail, please send your updated CV to (url removed) and I will get in touch. ...

Principal Platform Engineer - Ref: 1733 Initial contract until 27/12/26 98.82ph, UMB, inside IR35 Yeovil - Full time onsite Please note, DV clearance is required for this positon and the programme will have "UK Eyes Only" restrictions. Your Impact Are you ready to take on complex … technical challenges at the forefront of cyber and platform engineering? At Leonardo, our Principal Platform Engineers are hands-on experts who shape the design, integration, and delivery of secure platforms that keep our customers' missions running. Your work at Leonardo UK will see you take the lead in solving ...

Principal Systems Engineer (Mechanical/Electrical/Process Systems) Location: Hybrid - Derby Office attendance 2/3 days per week Contract Duration: 12 months Rate: £65 Per Hour Inside IR35 Are you a Systems Engineer with experience in mechanical, electrical, and process systems in highly regulated industries … such as nuclear, aerospace, or defence? We are looking for a Principal Systems Engineer to join a dynamic contract team delivering defence and decommissioning projects. You will work in a fast- paced, technically challenging environment, bridging complex systems, leading interface management, and delivering robust, compliant solutions. Key Responsibilities ...

Senior DevOps Engineer/Cloud Platform Engineer £700 to £750 per day via Umbrella Initial contract until November 2026 Hybrid role - 3 days per week on-site in Bury Design and build enterprise-scale AWS DevOps frameworks and CI/CD pipelines BPSS Clearance required ABOUT THE CLIENT … support the delivery of secure, scalable and highly available cloud services. Due to continued programme growth, they are looking for an experienced Senior DevOps Engineer/Cloud Platform Engineer to lead the evolution of their cloud deployment framework and DevOps tooling. THE SENIOR DEVOPS ENGINEER ROLE ...

Senior DevOps Engineer/Cloud Platform Engineer £700 to £750 per day via Umbrella Initial contract until November 2026 Hybrid role - 3 days per week on-site in Bury Design and build enterprise-scale AWS DevOps frameworks and CI/CD pipelines BPSS Clearance required ABOUT THE CLIENT … support the delivery of secure, scalable and highly available cloud services. Due to continued programme growth, they are looking for an experienced Senior DevOps Engineer/Cloud Platform Engineer to lead the evolution of their cloud deployment framework and DevOps tooling. THE SENIOR DEVOPS ENGINEER ROLE ...

Principal Platform Engineer (CyberArk/PAM) Active DV Clearance Highly Preferred, Lapsed DV Considered UKEO 6 Month Contract Initially £100/hour Umbrella Fully Onsite in Yeovil (compressed hours considered) We're recruiting for an experienced Principal Platform Engineer to join a high-profile defence programme ...

Principal Platform Engineer (CyberArk/PAM) Active DV Clearance Highly Preferred, Lapsed DV Considered | UKEO | 6 Month Contract Initially | £100/hour Umbrella | Fully Onsite in Yeovil (compressed hours considered) We're recruiting for an experienced Principal Platform Engineer to join a high-profile defence programme ...

Principal Systems Engineer – Architecture Barrow-in-Furness, Cumbria (or alternatively Filton, Bristol if desirable) – hybrid time on site TBC – 12 month contract duration – Pay rate £58 p/h PAYE basic (£66.43 p/h including holiday pay) or £78.33 p/h Umbrella We are looking … recruit a Principal Systems Engineer to work for our leading defence client on complex systems for submarine projects. Core Duties: Assists in the production of estimates, creates and/or assists in the production of design requirement specifications. Develops, promotes and shares new technologies for implementation across businesses ...

Principal Systems Engineer (Ref: 1705) Initial contract until March 2027 71.74ph LTD (Outside IR35) Basildon - full time onsite SC required, can start on BPSS The Role: Work closely with the Project Chief Engineer to identify and resolve technical issues across the whole system and subsystems … ensure the integrity of the solution. Deputise for the Project Chief Engineer within the project. Lead the architecture team to develop and document the architecture thought the project lifecycle. Lead the integration activity of sub-systems Lead the engagement with technical suppliers Influence all levels of requirements to enable ...

Role: Principal AI Engineer - Lead Colleague AI Transformation (Financial Services) Location: Central London, Hybrid working 2/3 times per week from the office, the rest from home Start Date: ASAP End Date: 6 Months initially Daily Rate: Very competitive day rate, Inside IR35 Overall Purpose … Role We are seeking a hands-on Principal AI Engineer to act as the technical right hand for the Automation & AI Practice, accelerating the Colleague AI agenda. This pivotal role will transition the organisation from isolated AI experiments to a fully resourced, governed, and scalable AI delivery capability. ...

Principal Systems Engineer – Future Combat Air - 1654 Location: Luton, UK (Capability Green) Contract Length: 12 Months Rate: £84.63 UMBRELLA Hours: 37 hours per week Working Pattern: 80–100% onsite (4–5 days per week) Clearance Required: SC Clearance eligible and Sole UK Nationality required My client … opportunity for a Systems Engineer to join the team supporting the development of advanced aerospace systems as part of the Global Combat Air Programme (GCAP) . This role will focus on supporting the development of system requirements, including design and interface definition activities to assist engineering teams with design ...

Principal Systems Engineer Luton 12-Month Contract Paying up to 85p/h (Inside IR35) Key Responsibilities Development of RF system requirements. Assisting engineering domains in design and integration activities. Assisting with requirements definition for integration, qualification, verification, and validation activities Essential: Hold a degree or equivalent qualification ...

Principal RF Engineer HWIL/RF Test & Simulation Stevenage | £65£75 per hour | Long-term contract Were supporting a leading UK defence organisation looking to bring in a Principal RF Engineer to join their specialist Hardware-in-the-Loop (HWIL) team. This is a hands ...

Principal RF Engineer Southampton (or alternatively Bristol) – 6 month duration – Pay rate £74.07 p/h Umbrella or £54.33 p/h PAYE (£62.23 p/h including holiday pay) We are recruiting for an Engineer with microwave engineering knowledge, who is familiar with working on complex ...

Principal RF Engineer HWIL/RF Test & Simulation Stevenage £65£75 per hour Long-term contract Were supporting a leading UK defence organisation looking to bring in a Principal RF Engineer to join their specialist Hardware-in-the-Loop (HWIL) team. This is a hands ...

Principal RF Engineer Southampton (or alternatively Bristol) - 6 month duration - Pay rate £64.81 p/h Umbrella or £47.54 p/h PAYE (£54.45 p/h including holiday pay) We are recruiting for an Engineer with microwave engineering knowledge, who is familiar with working on complex ...

Principal Firmware Engineer (FPGA) – 1701 Location: Edinburgh (primarily onsite, with limited remote working) Duration: 12 Months (Inside IR35) Rate: £70 per hour Umbrella We seek an engineer with recent high-integrity or safety-critical industry experience (defence, aerospace, or similar), or eligible for UK security clearance. Overview … opportunity has arisen for a Principal Firmware Engineer to join a multidisciplinary engineering team developing advanced FPGA and firmware solutions for complex, high-performance electronic systems. The role covers the full development lifecycle, including requirements capture, architecture development, FPGA design, integration, verification, and qualification activities. The successful candidate ...

PRINCIPAL C++/QT SOFTWARE ENGINEER 12 MONTHS CONTRACT HYBRID WORKING HAMPSHIRE £400/DAY OUTSIDE IR35 Principal C++/Qt Software Engineer is required to work for a leading engineering organisation on a long-term programme developing advanced software solutions for Embedded Linux platforms click ...

Role: Senior/Principal Infrastructure Engineer Location: Reading Rate: £45.00 - £53.00 per hour Outside IR35 Contract Length: 12 months (6 months considered) Hours: 36-40 hours per week Working Arrangement: The wider team typically works 3 days in the office and 2 days from home. Open to discussions … this and can be flexible. The Opportunity We are seeking an experienced Senior or Principal Civil Infrastructure Engineer to join a growing consultancy delivering a diverse range of development and infrastructure projects. This role offers the opportunity to work directly with developers, planners, architects and multidisciplinary design teams ...

Hays are now looking for a Senior/Principal DevOps & CloudOps Engineer for one of our local retail clients: £700 - £800 p/d Inside IR35 (depending on level) 3 days p/w in the office, rest is WFH Location is Bury We are looking … Senior or Principal DevOps & CloudOps Engineer to design, build, and evolve our enterprise CI/CD and cloud infrastructure frameworks. Working closely with Engineering, Product, QA, Security, and Reliability teams, you will help deliver secure, scalable, automated, and high-performing cloud services while enabling development teams to deploy ...

Principal Firmware Engineer (FPGA) - 1701 Location: Edinburgh (primarily onsite, with limited remote working) Duration: 12 Months (Inside IR35) Rate: £70 per hour Umbrella We seek an engineer with recent high-integrity or safety-critical industry experience (defence, aerospace, or similar), or eligible for UK security clearance click ...

Principal Software Test Engineer 12 months contract Hybrid working Hampshire County £400/day Outside IR35 Seeking an experienced Principal Software Test Engineer to join a long-term programme focused on the development of advanced software solutions on Embedded Linux platforms click apply for full ...

Senior DevOps Engineer/Cloud Platform Engineer £700 to £750 per day via Umbrella Initial contract until November 2026 Hybrid role - 3 days per week on-site in Bury Design and build enterprise-scale AWS DevOps frameworks and CI/CD pipelines BPSS Clearance required ABOUT THE CLIENT ...