Principal Engineer Jobs in United Kingdom

As Principal Engineer, you'll be responsible for defining and championing appropriate engineering practices across product development, ensuring our teams consistently deliver brilliant, commercially successful products. You'll act as a trusted technical authority, mentor and problem solver, influen

We are seeking a Principal Engineer (Platform Architecture) to help lead the design and evolution of our market-leading analytics platform, shaping technical direction while solving complex, real‑world problems at scale. About us Founded in 2014, Cassini is the established, core utility provider of

The New Technologies Group identifies, evaluates and develops the emerging technologies that will shape Plessey's future products. The team turns new concepts into validated technologies, supports the company's technology roadmap and makes sure new developments transfer successfully into manufacturi

MOO brings brands to life in a sustainable way, with a range of remarkable print and merchandise products. We combine design, technology, manufacturing and service, so that people can connect in memorable ways. Not online but out there, in real life. We started in 2004. Since then we’ve built an awa

About Us_// At Masabi, we’re driving the fare payment revolution, powering the journeys of millions all over the world. We build fare collection platforms that allow riders to seamlessly buy and present tickets for public transport either on their mobile phones, from a ticket machine, or even by tap

About Us_// At Masabi, we’re driving the fare payment revolution, powering the journeys of millions all over the world. We build fare collection platforms that allow riders to seamlessly buy and present tickets for public transport either on their mobile phones, from a ticket machine, or even by tap

Shape the Future of Scotland's Energy Network At BakerHicks, we're playing a key role in delivering the UK's energy transition. Working alongside our construction colleagues at Morgan Sindall Utility Services, we have experienced significant growth within the Transmission & Distribution sector and c

About Commercetools Real innovation starts with a strong foundation, and at commercetools, that comes from the perfect balance of our product and our people. Behind every leap forward is a collective of builders, explorers, doers, makers, and problem-solvers. The kind of people who not only pioneere

BakerHicks has experienced significant growth within the Transmission & Distribution sector over the last decade, securing and delivering major infrastructure projects across the UK. As our project portfolio continues to expand, we're looking for a Senior / Principal Electrical Engineer - HV Distrib

The Role We have an opportunity for a Principal Engineer working with a particular focus on our defence and security clients. You’ll join a team of talented engineers and scientists designing, building, and testing intelligent, human-centric systems. As one of the senior technical voices in the team

Company Overview Throughout our worldwide network of experts, clients and communities, we are renowned for our leadership in fire protection engineering – a legacy of responsibility we have proudly upheld since 1939. Today, our expertise extends broadly across closely related security and risk-based

CoreWeave is The Essential Cloud for AI™. Built for pioneers by pioneers, CoreWeave delivers a platform of technology, tools, and teams that enables innovators to build and scale AI with confidence. Trusted by leading AI labs, startups, and global enterprises, CoreWeave combines superior infrastruct

Reporting to the Associate Director or Associate Engineer, you’ll lead Civil & Structural project teams or oversee multiple smaller teams, taking responsibility for the technical delivery and overall performance of your projects. We’re looking for a well-rounded engineer with broad experience across

About the Role Reporting to the Head of Civils - Bridges, you will be a Chartered Engineer with experience of managing medium-size bridges projects, or managing packages on large projects, typically in a discipline lead capacity. The ideal candidate will be capable of managing diverse projects and a

Fin, now part of Salesforce, is on a mission to help businesses provide perfect customer experiences. Our AI Agent Fin is the highest-performing AI Customer Agent on the market today, enabling businesses to deliver impeccable, always-on customer support across the customer journey, from service, to

Location: London, Warwick, Manchester, Derby At BakerHicks, ​​​​​​​our Electrical Services team works with clients across multiple sectors, delivering large and complex projects which require highly resilient power supplies. Specialising in heavily-regulated industries where quality and safety are k

Updated: 07 July 2026 Freelance | 8–20 hrs/week | Remote (EU/UK) Are you an accomplished Principal Software Engineer passionate about shaping the future of artificial intelligence? Join 10x Team as a Freelance Principal Software Engineer – AI Trainer and leverage your technical expertise to enhance

About AlphaSense: AlphaSense is the AI platform redefining market intelligence and workflow orchestration, trusted by thousands of leading organizations to drive faster, more confident decisions in business and finance. The platform combines domain-specific AI with a vast content universe of over 50

Company Overview Throughout our worldwide network of experts, clients and communities, we are renowned for our leadership in fire protection engineering – a legacy of responsibility we have proudly upheld since 1939. Today, our expertise extends broadly across closely related security and risk-based

Canonical is a leading provider of open source software and operating systems to the global enterprise and technology markets. Our platform, Ubuntu, is very widely used in breakthrough enterprise initiatives such as public cloud, data science, AI, engineering innovation, and IoT. Our customers inclu