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 enviro...Read More>>.

Overview In this role you will define, lead, and contribute to the evolution of core search and indexing capabilities within Elasticsearch. You will research advances in search infrastructure and work with partners to shape the long-term te...Read More>>.

Overview In this Staff Engineer role, you lead quality assurance and validation for Arm Neoverse-based platform software and firmware, spanning pre-silicon to production. You drive end-to-end testing, define validation strategies, and eleva...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>>.

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 As Principal Engineer, you’ll lead and apply expert geotechnical and tunnel design knowledge to complex European projects, guiding multidisciplinary teams and ensuring delivery with safety, quality and sustainability in mind. You...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 In this role, you will help design and usher a novel injectable drug-delivery device from concept to production. You will join a small, multidisciplinary team at a London HQ and work within ISO 13485 standards to deliver a next‑g...Read More>>.

Energy Trading - Principal Software Engineer London About Indicium AI Indicium AI is trusted by the world's leading enterprises to deliver AI into production at scale. We are a global AI-native consultancy with pro...Read More>>.

Nexus Mods in Exeter seeks a Principal Software Engineer to lead the App Engineering team behind Vortex, our flagship desktop mod manager used by millions. You’ll write production code, shape architecture, and mentor others while solving deep sy...Read More>>.

Cure Talent are delighted to be partnered with an emerging wearable medical technology company at a defining stage of its growth. We are seeking a Principal Software Engineer to provide technical leadership across the software function, working cl...Read More>>.

Leonardo is seeking a Principal Software Engineer to drive pivotal technical work within our Integrated Sensors & Protection line. You will develop a new generation of features using innovative C/C++ software across defence projects, collaborating...Read More>>.

Principal Software Engineer, Backend - Full or Part Time Manchester You’ve probably heard of Autotrader, but do you know what we’re all about? We’re the UK’s leading automotive marketplace, a heritage brand, and a...Read More>>.

nineDots.io is seeking a Principal Engineer to help define how the world decides what software can be trusted. You will tackle software supply chain trust, building systems to verify provenance, security, and governance across pipelines and artifa...Read More>>.

ABOUT US:LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our cus...Read More>>.

About UsTÜV Rheinland Solutions Rail Division, Derby forms part of TÜV Rheinland’s wider technical and engineering capability serving the rail industry. Located in Derby, one of the UK’s principal railway centres, the division is...Read More>>.

Principal Engineer – Photolithography Job Summary We are seeking a highly skilled and innovative Principal Engineer specialising in photolithography processes to support advanced photonics R&D and manufacturing....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>>.

Job Description: Your impact Would you like a once-in-a-generation opportunity to play a key role in a defence programme of national and international importance? We are on the hunt for talented software engineers to su...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>>.

Raytheon UK is hiring a Principal Software Engineer in London. You will join a cross‑functional team delivering critical software for national security, using React/NextJS, TypeScript, Python, and Java across cloud environments.Role requi...Read More>>.

McNally Recruitment Ltd is seeking a Principal Engineer to join a large UK client in Edinburgh or London, with 6 days in the office per month and the rest remote. You will design and engineer software with customer experience at the forefront, con...Read More>>.

Principal Software Engineer C++ (Cloud Video Framework)Principal Software Engineer C++ (Cloud Video Framework)Contract: Full-Time, PermanentWorking Location: Hybrid, 2 Days a week in the office, minimum...Read More>>.

Albany Growth is partnering with a software business undergoing a major technology transformation. We are hiring a Principal Software Engineer to stay hands-on while shaping how to rebuild a large legacy product estate for a cloud-native future....Read More>>.

ZoomInfo is accelerating careers with a fast-paced, bold culture. We are seeking a Principal Software Engineer to own features across the full stack—from React frontends to backend APIs and cloud infrastructure—while shipping fixes for product...Read More>>.

Simple Machines is a leading boutique technology firm seeking a Principal Software Engineer to design and deliver complex, scalable systems across backend, APIs, frontend, data pipelines, and cloud infrastructure. You’ll work with internal teams...Read More>>.

Out of the successful launch of Chase in 2021, we’re a new team, with a new mission. We’re creating products that solve real world problems and put customers at the center - all in an environment that nurtures skills and helps you realize your...Read More>>.

MHR International UK Limited is seeking a Principal Software Engineer to lead complex engineering challenges that shape our products and technical direction. You will operate across the organisation—defining strategy, influencing architecture, a...Read More>>.

Our MissionAt Palo Alto Networks we’re united by a shared mission—to protect our digital way of life. We thrive at the intersection of innovation and impact, solving real-world problems with cutting-edge technology and bold thinking....Read More>>.

Shift Pattern:Standard 40 Hour Week (United Kingdom)Scheduled Weekly Hours:40Corporate Grade:C - Vice PresidentReporting Line:(UK Division) Information TechnologyLocation:UK-...Read More>>.

Want your engineering work to contribute to breakthroughs in cancer research, drug discovery and next-generation healthcare? I'm working with a mission-led technology company building advanced software, AI and automation platforms that help...Read More>>.

Electrical Technical Principal – HV Power TransmissionLocation: UKEmployment Type: Full-timeSalary: Competitive, dependent on experienceAbout the CompanyOur clien...Read More>>.

Aston University Engineering Academy (AUEA) invites applications for a Principal to lead the Academy in Birmingham. This permanent, full-time post sits on the Leadership Scale SL19-SL26 and offers a substantial salary package of £91,156 to £108,...Read More>>.

Not every software leadership role is about managing people and not every technical role gives you the chance to shape solutions, influence clients and still keep your hands on the technology.This is different!Here is an opportunity...Read More>>.

Assystem is seeking a CS&A Principal Engineer (Nuclear) for a permanent, on-site role in Warrington, UK. You will lead the CS&A design and site engineering team, review submissions, and interact with JV construction teams on Sellafield-related pro...Read More>>.