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Principal Engineer United Kingdom Jobs (On-site work)

50 Job Offers

Principal Electronics Design Engineer
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Principal Electronics Design Engineer sought to lead hardware development in Cheshire, UK. You will define electronics architecture, drive analogue/digital design from concept to production, and own PCB quality. Requires a degree in Electronics Engineering, strong experience in product developmen...
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United Kingdom , Cheshire
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85000.00 GBP / Year
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Zenovo
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Principal C++ Engineer
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Principal C++ Engineer sought for a front-office options desk in London, building a brand-new trading stack. You will leverage deep C++ and Linux expertise, including multi-threaded programming, to design and implement bespoke automated trading software. This role demands strong engineering princ...
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United Kingdom , London
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180000.00 - 200000.00 GBP / Year
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Harrington Starr
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Principal Mechanical Design Engineer
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Principal Mechanical Design Engineer sought for Blackburn, London, and Glasgow offices. You will lead designs for district heating, energy centres, and heat pumps. Requires 6+ years in mechanical design for power or building services, plus AutoCAD proficiency. Benefits include car allowance, pens...
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United Kingdom , Blackburn
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Not provided
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Vital Energi Utilities Limited
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Principal Mechanical Design Engineer
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Principal Mechanical Design Engineer sought for Glasgow, London, and Blackburn. You will lead the design of district heating, energy centres, and trigeneration solutions. Requires 6+ years in mechanical design for power, renewables, or building services, plus AutoCAD proficiency. Benefits include...
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United Kingdom , Glasgow
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Not provided
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Vital Energi Utilities Limited
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Principal Software Engineer
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Principal Software Engineer sought by Mastercard to lead DevOps automation across on-prem and cloud infrastructure. Leverage Terraform, Ansible, Chef, and Kubernetes to build CI/CD pipelines and drive Infrastructure as Code. Requires 10+ years’ experience, strong Linux skills, and cloud expertise...
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United Kingdom , London
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Not provided
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Mastercard
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Principal Electrical Critical Systems Engineer
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Principal Electrical Critical Systems Engineer sought by a top-ranked, partner-owned consultancy in London. Join our award-winning Data Centre team, delivering low-carbon, resilient engineering solutions. You need a degree in Electrical Engineering, consulting experience, and a drive to excel in ...
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United Kingdom , London
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Not provided
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Cundall
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Principal Structural Engineer
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Principal Structural Engineer sought for a Birmingham-based role leading prestigious UK and international projects. This client-focused position requires a Chartered Engineer (CEng) with significant design experience in a multi-disciplinary consultancy. You will drive business development, manage...
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United Kingdom , Birmingham
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Not provided
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Cundall
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Principal Electrical Engineer
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Principal Electrical Engineer sought for Egis Transport Solutions in London. Lead rail station electrical design, manage a team, and ensure project delivery. Requires a degree, chartered status, and deep knowledge of Network Rail, HS2, and TfL standards. Join a dynamic team driving innovation in ...
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United Kingdom , London
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Not provided
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Egis in the UK
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Principal Electrical Design Engineer
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Principal Electrical Design Engineer sought to lead design teams in Glasgow, UK. You will oversee high-profile renewable energy projects, developing electrical designs for power generation and transmission. Requires 6+ years’ experience, knowledge of BS7671, and ideally Chartered status. Benefits...
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United Kingdom , Glasgow
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Not provided
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Vital Energi Utilities Limited
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Principal Electrical Design Engineer
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Principal Electrical Design Engineer sought to lead high-profile renewable energy projects across Blackburn, London, and Glasgow. You will oversee design delivery, manage a team, and develop technical specifications for power generation and transmission. Requires 6+ years’ experience, knowledge o...
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United Kingdom , London
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Vital Energi Utilities Limited
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Principal Software Engineer
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Principal Software Engineer sought for a Luton-based role supporting mission-critical embedded systems. Requires ISTQB knowledge, strong test automation skills (Python, C++), and active SC Clearance. You will create automated test scripts, perform integration and regression testing, and collabora...
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United Kingdom , Luton
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Salary
74.00 GBP / Hour
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Morson Talent
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Principal Research Engineer
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Lead next-gen distributed data and AI research as a Principal Research Engineer at Toshiba’s Bristol R&I Lab. Drive cross-domain data sharing and digital twin innovations for sustainability. Requires a PhD in computer science, deep data sharing expertise, and strong system engineering skills. Joi...
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United Kingdom , Bristol
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Not provided
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Toshiba EMEA
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Principal Embedded Software Engineer
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Principal Embedded Software Engineer sought to lead embedded systems architecture and technical delivery in Bradford, UK. This senior, hands-on role demands advanced C/C++, RTOS, and multithreading expertise, plus electrical power systems knowledge. You will own the full software lifecycle, from ...
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United Kingdom , Bradford
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Salary
75000.00 GBP / Year
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Zenovo
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Principal Embedded Software Engineer
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Principal Embedded Software Engineer sought to lead architecture, technical delivery, and strategy for advanced embedded systems in Manchester. This senior, hands-on role demands expertise in C/C++, RTOS, real-time systems, and electrical power systems knowledge. You will own end-to-end product d...
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United Kingdom , Manchester
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Not provided
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Zenovo
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Principal Civil Engineer
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BSP Consulting seeks a Principal Civil Engineer in Nottingham to lead design and drafting across residential, industrial, and commercial sectors. You will manage projects valued up to £30m, using InfoDrainage, Civil 3D, and AutoCAD, with mentorship towards ICE Chartership available. Ideal candida...
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United Kingdom , Nottingham
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Not provided
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BSP Consulting
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Staff / Principal Machine Learning Engineer, Serving
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Staff / Principal Machine Learning Engineer, Serving – UK. Join Inworld, a leading AI research lab backed by $125M+ from top investors, to optimize and deploy realtime multimodal models at scale. You will own full-cycle serving, from containerization to inference optimization and high-performance...
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United Kingdom
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140000.00 - 200000.00 GBP / Year
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Inworld AI
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Principal Automation Engineer
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Lead automation engineering for a long-term Oil & Gas downstream contract in Grimsby, UK. This Principal role requires 10+ years of experience with PLC, SCADA, and DCS platforms, plus expertise in FEED, FAT/SAT, and hazardous area standards (ATEX). You will coordinate with Clients and EPCs, ensur...
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United Kingdom , Grimsby
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Not provided
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Airswift Sweden
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Principal Software Engineer
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Principal Software Engineer sought by RX Global in Richmond, UK. Drive domain architecture, mentor senior engineers, and own technical roadmaps for high-impact systems. Requires deep expertise in distributed systems, cloud-native AWS solutions, and legacy modernisation. Lead through influence, ba...
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United Kingdom , Richmond
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Not provided
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RX Global
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Principal Systems Engineer
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Principal Systems Engineer needed for a 12-month contract in Edinburgh or Newcastle. You will support radar system development by analyzing large datasets from rig and flight trials using MATLAB. Key requirements include V-model lifecycle expertise, safety-critical systems experience, and SC Clea...
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United Kingdom , Edinburgh
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Salary
65.00 - 70.00 GBP / Hour
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Morson Talent
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Principal Civil Engineer
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Lead major civil engineering projects in Glasgow's nuclear sector. This senior role requires a Chartered Engineer with expertise in steel/concrete structures, Eurocodes, and UK nuclear regulations. You will ensure technical compliance and safety across the full project lifecycle, from concept des...
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United Kingdom , Glasgow
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Not provided
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ASSYSTEM
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Until further notice
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About the Principal Engineer role

Explore the pinnacle of technical leadership with Principal Engineer jobs. A Principal Engineer is a master-level technical expert and strategic leader within an engineering organization. This is not merely a senior role; it represents the apex of an individual contributor technical track, where influence, architectural vision, and deep expertise converge to shape the technological future of a company. Professionals in these roles are the go-to authorities for the most complex, high-impact challenges, setting technical standards and driving innovation across multiple teams or the entire organization.

The common responsibilities of a Principal Engineer are vast and critical to long-term success. Typically, they involve defining and driving the long-term technical strategy and architectural vision for major platforms or product suites. They are responsible for researching, prototyping, and selecting technologies that will scale to meet future business needs. A core part of their duties includes leading the design and implementation of complex, cross-functional systems, ensuring they are resilient, secure, and efficient. They serve as the ultimate escalation point for critical production issues, conducting deep-dive analysis and root cause investigations to resolve systemic problems. Furthermore, Principal Engineers have a significant mentorship and governance function, actively coaching senior and staff engineers, establishing best practices, and conducting rigorous code and design reviews to maintain exceptional quality across all engineering outputs. They are also key collaborators, working closely with engineering managers, product leaders, and enterprise architects to align technical execution with business objectives.

The typical skills and requirements for these high-level positions are extensive. A bachelor's or master's degree in computer science, engineering, or a related field is common, though equivalent demonstrable experience is often acceptable. Most roles require a minimum of 10+ years of progressive, hands-on software development or infrastructure engineering experience, with a significant portion spent in lead or architecture-focused positions. Essential technical skills include mastery of relevant programming languages and frameworks, profound knowledge of system design patterns and distributed architectures, and expertise in cloud platforms like AWS, Azure, or GCP. They must possess exceptional analytical and problem-solving abilities to deconstruct ambiguous, complex problems. Beyond technical prowess, superior soft skills are non-negotiable; this includes outstanding communication to articulate technical vision to both technical and non-technical stakeholders, proven leadership and influence without formal authority, and strategic business acumen. For those seeking to define technological frontiers and mentor the next generation of experts, Principal Engineer jobs offer a challenging and highly rewarding career path at the forefront of innovation.