Principal Engineer Advanced Manufacturing & DefenceUp to £70,000Location: Dorking, SurreyEngineering expertise meets customer engagement, inno...Read More>>.

Principal Engineer - Product SafetyBarrow based (Mainly remote 2-3 days per month on site) £74.68 per hour Umbrella inside IR35 12 Month Contract Currently recruiting for a Principal Engineer - Product Safety to work wi...Read More>>.

Overview In this role you design, build, and maintain advanced AI-enabled software products within JPMorganChase's CDAO Technology Group. You collaborate with engineers, data scientists, and product owners to deliver production-ready soluti...Read More>>.

Overview In this Principal Engineer role, you will provide high-impact technical leadership to guide architecture, DevOps, and cloud initiatives within a market-leading financial services organization. You will influence tech leads and seni...Read More>>.

Overview As Principal Engineer, you will lead technical teams and shape cutting-edge Java solutions that address real-world client needs. You’ll work within Solirius Reply’s Software Engineering Practice, collaborating closely with clie...Read More>>.

Overview In this role you will lead technically challenging rail engineering assignments across the UK, shaping future rail infrastructure and electrification schemes. You will work with multi-disciplinary teams and clients to deliver proje...Read More>>.

Overview As an OLE Principal Engineer in the Rail North unit, you will lead the technical design and delivery of overhead line projects, ensuring quality, cost, and schedule targets are met. You’ll act as a technical lead, coordinating wi...Read More>>.

Overview In this role you will lead civil and structural design for complex rail infrastructure, shaping major projects across London and Bristol. You will provide technical direction within multidisciplinary teams and ensure quality across...Read More>>.

A leading cloud and software engineering consultancy in Greater London seeks a Principal Software Engineer to provide senior technical leadership. You'll design and evolve scalable software systems, mentor engineers, and influence architectural stand...Read More>>.

慨正橡扯 in the United Kingdom is seeking a Principal Software Engineer to join their team in Manchester or Gloucester. This full-time, permanent position offers a hybrid working pattern, focusing on both technical tasks and team leadership....Read More>>.

Raytheon UK have a full time, permanent opportunity for a Principal Software Engineer to join our team on our Manchester or Gloucester sites within a hybrid working pattern. As Principal Software Engineer, you have the opportunity...Read More>>.

OverviewThe Applied Innovation (of AI) Engineering team is an elite machine learning group strategically located within the Chief Data Analytics Office (CDAO) Technology group of JPMorgan Chase. AI Engineering tackles business critical...Read More>>.

Job Description As a Principal Software Engineer at JPMorgan Chase within CDAO Technology Group in the Applied Innovation (of AI) Engineering team, you will design, develop, deploy, and maintain advanced AI products. You’ll collabora...Read More>>.

The Applied Innovation (of AI) Engineering team is an elite machine learning group strategically located within the Chief Data Analytics Office (CDAO) Technology group of JP Morgan Chase. AI Engineering tackle business critical priorities using...Read More>>.

Gemba Advantage is hiring Senior and Principal Engineers to shape secure, scalable software for critical public sector systems across the UK. You will influence technical direction, mentor teams, and work with customers to solve complex problems,...Read More>>.

Raytheon UK is seeking a Principal Software Engineer in Gloucester. The role is hybrid with onsite work and a requirement for SC and eDV clearance aptitude.You will design and implement software across the stack, collaborating with stakehol...Read More>>.

Are you passionate about leading technical excellence while remaining hands‑on in building high-quality software? Do you enjoy influencing teams, shaping engineering practices, and delivering reliable, secure, and observable solutions in a co...Read More>>.

Are you passionate about leading technical excellence while remaining hands-on in building high-quality software? Do you enjoy influencing teams, shaping engineering practices, and delivering reliable, secure, and observable solutions in a coll...Read More>>.

Join a leading multi-strategy investment management firm where technology plays a critical role in supporting investment, trading, risk and operational functions. The firm operates across multiple investment strategies and relies on soph...Read More>>.

easyJet is seeking a Principal Software Engineer to lead the eCommerce Platform Delivery team. You will guide multiple squads, drive architectural choices, and ensure secure, scalable, high-performance systems.A strong focus on data integri...Read More>>.

easyJet Airline Company PLC is seeking a Principal Software Engineer to lead the eCommerce Platform Delivery team. You will drive the technical vision, architecture, and delivery of high‑performance, secure systems across multiple squads....Read More>>.

RoboShadow, a fast-growing UK-based cyber security startup, is seeking a hands-on Principal Software Engineer to lead delivery and technical direction.This is a true player-coach role, not pure management; you will code, review, architect,...Read More>>.

Palo Alto Networks is seeking a senior software engineer to join the Cortex Platform team. You will work with DevOps, application teams, QA and leadership to design and drive backend and platform changes with real impact across the Cortex ecosyste...Read More>>.

Raytheon UK is seeking a Principal Software Engineer to join our established software development function in London. You will work in a cross-functional team, delivering and deploying critical software across multiple business areas.The ro...Read More>>.

TipTopJob seeks a Principal Software Engineer to lead embedded and application software efforts in a cyber and defence context. You will shape technical direction, mentor a talented team, and deliver high-quality software for mission-critical prog...Read More>>.

JPMorganChase is seeking a Principal Software Engineer within Infrastructure Platforms Engineering & AI Practices to lead across multiple teams. You will design and build platforms and shared services that meet access, compliance, and governance r...Read More>>.

TPXimpact is seeking a Principal Software Engineer to shape the technical direction of high-profile projects and lead delivery of modern, scalable software. You will mentor engineers across teams, line-manage a group, and collaborate with senior s...Read More>>.

Principal Software Engineer C++ (Cloud Video Framework) Contract: Full-Time, Permanent Working Location: Hybrid, 2 Days a week in the office, minimum Office Locations: UK/Hungary Join Our Team...Read More>>.

Cytix is hiring a hands-on Technical Leader who will unblock the engineering team by resolving technical impasses, standardising practices, and owning cross-functional initiatives. You’ll prototype rapidly, ship MVPs, and turn ideas into polishe...Read More>>.

Principal Engineer Department: R&D Employment Type: Full Time Location: Plymouth Description The New Technologies Group identifies, evaluates and develops the emerging technologies that w...Read More>>.

Job Description SummaryPrincipal Engineers combine a high level of technical expertise with sound business acumen and a good understanding of engineering processes. They are part of a formal career path for technica...Read More>>.

Job DescriptionPrincipal Engineer - Support Engineering - Reliability-Centred Maintenance (RCM)Location: Barrow / Brough / FiltonContract: 12 monthsHeadcount: 1Working Pattern: 37...Read More>>.

Edinburgh or London UK-based | Edinburgh or London | Approximately 1 day per week Build the future, in the real world. We’re looking for a Principal Engineer to join us in a Forward Deployed role — w...Read More>>.

As a Senior Principal Engineer within Siemens Energy's UK Grid Technologies business, your day will be centred on leading and guiding a team of engineers to deliver high-quality primary engineering designs for UK transmission operator substations,...Read More>>.

Principal Engineer - Forward DeployedUK-based | Edinburgh or London | Approximately 1 day per weekBuild the future, in the real world.We're looking for a Principal Engineer to join us in a Forward Deployed role - working dir...Read More>>.

End Date Wednesday 21 October 2026 Salary Range £84,624 - £126,936 We support flexible working - click here for more information on flexible working options Flexible Working Options Hybrid Working, Job ShareJob Description Summary...Read More>>.

A Snapshot of Your DayAs a Senior Principal Engineer within Siemens Energy's UK Grid Technologies business, your day will be centred on leading and guiding a team of engineers to deliver high-quality primary engineering designs for UK tra...Read More>>.

Role MissionTo support customer outcomes by making deep, hands-on Microsoft centric expertise available to customers and internal teams across hybrid identity, security and endpoint management. This includes Windows Active Directory and i...Read More>>.

xdesign is seeking a Principal Engineer for a Forward Deployed role in the UK, based in Edinburgh or London. You will work directly with client teams to turn emerging technology into production-ready outcomes, staying hands-on and close to the pro...Read More>>.

We are looking for a Principal Engineer – Powertrain to lead the Powertrain function across Gordon Murray Automotive programmes, delivering the design, development, calibration and global regulatory certification of ultra-low-volume, cutting-...Read More>>.

Safran is an international high-technology group operating in the fields of aerospace (propulsion, equipment and interiors), space and defense. Its mission is to contribute sustainably to a safer world, where air transport becomes ever more environme...Read More>>.