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

Overview In this role, you drive the design and delivery of highways and drainage schemes within a multidisciplinary infrastructure firm. You will lead technical delivery, guide project teams, and collaborate with clients and authorities to...Read More>>.

Overview As Principal Engineer in Exponent’s Mechanical Engineering Practice in London, you drive growth and technical leadership in a global specialty consultancy. You will identify new business opportunities, lead strategic client engag...Read More>>.

Overview As a Principal Engineer at Intercom, you lead strategic, high-impact initiatives across backend and frontend systems, aligning with product and research teams. You’ll influence technical direction, architecture, and the pace of d...Read More>>.

Overview In this role, you provide authoritative technical leadership over internal and partner software teams, ensuring coding standards, architecture, and security guidelines. You’ll act as the senior escalation point for critical incid...Read More>>.

Overview As a Principal Software Engineer, drive the architecture and technical direction for a global, high-scale API platform. You will partner with cross-functional squads to solve complex distributed systems challenges in a cloud-native...Read More>>.

Overview As a Senior IC in MOO's Platform group, you shape the architecture for the end-to-end order journey across storefront, checkout, manufacturing, and post-purchase tooling. You lead strategic technical decisions, mentor engineers, an...Read More>>.

Overview As Principal Engineer, you will lead autonomous cross-functional squads to deliver impactful software for healthcare and drug discovery. You’ll guide agile ways of working and drive product success across teams, while still activ...Read More>>.

Overview As Principal Engineer at On the Beach, you will drive technical innovation at scale, shaping the platform that powers discovery, booking, and experiences for millions of travelers. You’ll define architectural direction, modernise...Read More>>.

Overview In this role you will lead electrical substation design efforts within Murphy Applied Engineering, delivering 3D HV layouts and technical specifications up to 400 kV. You will collaborate with the Engineering Manager HV Plant and c...Read More>>.

Overview As a Principal Backend Engineer, you will design and build scalable, distributed backend services using Java and serverless tech, while contributing to frontend needs when required. You’ll lead the shared services that power Turn...Read More>>.

Overview In this role you lead technical delivery for bridge and structural maintenance and refurbishment projects, with emphasis on post-tensioned concrete bridges. You will guide designs, ensure standards compliance, and collaborate acros...Read More>>.

Overview As Principal Engineer, you will shape architecture, engineering standards, and technical direction to deliver scalable, secure software and cloud-native solutions. You’ll lead from the front, guiding cross-functional teams to shi...Read More>>.

Overview In diesem Senior role, you will act as the technical authority for the Business Systems domain, shaping standards and engineering direction. You will lead high‑impact architectural work, mentor engineers, and ensure scalable, sec...Read More>>.

Overview In this leadership role, you guide HVDC Plant engineering across a multi-project offshore portfolio, aligning designs with standards and regulatory requirements. You will drive technical consistency, risk balance, and delivery cert...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>>.

About Nscale Nscale is the GPU cloud engineered for AI. We provide cost‑effective, high‑performance infrastructure for AI start‑ups and large enterprise customers. Nscale enables AI‑focused companies to achieve superior results...Read More>>.

A leading GPU cloud provider in the UK is seeking a Principal Software Engineer to lead the development of their Fleet Manager platform. The successful candidate will own the architecture of Python-based automation systems. Responsibilities include m...Read More>>.

A leading technology recruitment agency is seeking a remote-first Principal Engineer for a key role with a client known for their high-performance software solutions. The ideal candidate will have over 10 years of software engineering experience, exp...Read More>>.

Principal Software Engineer, Fullstack/Backend Technologies (UK Remote)Full-timeWhen you join Turnitin, you'll be welcomed into a company that is a recognized innovator in the global education space. For more than 25...Read More>>.

Around the world, SYSTRA’s specialists plan, design, integrate, test, commission, project manage and deliver mass transit and mobility solutions that are relied on by more than 50 million people every day.For more than 60 years, t...Read More>>.

Elastic, the Search AI Company, is seeking a Principal Software Engineer to join the Elasticsearch - Search Infra team. You will define, lead, and contribute to core search and indexing capabilities in a globally distributed environment.You...Read More>>.

Raytheon UK is seeking a Principal Software Engineer in London for a permanent, onsite position. You will join a cross-functional software dev team delivering critical software for defence and aerospace projects.Candidates must hold an acti...Read More>>.

Sanderson Government & Defence is seeking a Lead/Principal Software Engineer to drive backend platforms for secure clients. Remote work while SC, with on-site Cheltenham 4 days post-DV, and a mix of private/public cloud deployments.You will...Read More>>.

Lead delivery with vision.Are you ready to take up a vital role in shaping some of our exciting projects? How about joining our talented team, where everyone has a voice, and together we face our clients' problems head-on. It's'a diver...Read More>>.

Are you a highly experienced Engineer ready to lead complex technical change and shape the future of our technology platforms? We’re looking for a Principal Engineer to provide technical leadership across critical delivery initiatives, tr...Read More>>.

Elastic, the company behind Elasticsearch, is seeking a Principal Software Engineer for the Elasticsearch - Search Infra team. You will define, direct, and build the next generation of Elasticsearch capabilities, focusing on indexing, retrieval, a...Read More>>.

We’re looking for a Principal Software Engineer to join the Elasticsearch - Search Infra team This globally-distributed team of experienced engineers focuses on delivering a robust and feature-rich search experience, including con...Read More>>.

Bring more to life. Are you ready to accelerate your potential and make a real difference within life sciences, diagnostics and biotechnology? At Abcam, one of Danaher’s 15+ operating companies, our work saves lives—and we’re all united by a...Read More>>.

MHR International UK Limited is seeking a Principal Software Engineer to lead complex engineering challenges within our modern SaaS environment. You will set strategy, influence architecture, and guide delivery across the organisation, leveraging...Read More>>.

Job Description Overview The Power Energy Systems (PES) Practice of AtkinsRéalis is seeking a Principal Engineer for Overhead Lines to join our team in the UK. We are looking for an energetic and experienced OHL Engineer who can act as a technica...Read More>>.

About Analog DevicesAnalog Devices, Inc. (NASDAQ: ADI ) is a global semiconductor leader that bridges the physical and digital worlds to enable breakthroughs at the Intelligent Edge. ADI combines analog, digital, and software technologies...Read More>>.

Skipton Building Society is seeking a Principal Engineer to lead the Digital Experience Platform and set engineering tenets that shape strategy, delivery and security by design. You will drive VFQ excellence, scale AEM and our Design System, and e...Read More>>.

The Core Banking Platform is the engine that underpins how Skipton records, manages and protects the financial lives of its members. It supports every savings and mortgage account, every transaction posted, every interest calculation and every pro...Read More>>.

Principal Engineer (Geo-environmental Services)Posting Date - 20 Mar, 2026AtMason Evans, we’re a specialist team providing top-tier geo-environmental and geotechnical services across the UK. From contaminated land assessme...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>>.

We Are Zenith is partnering with an innovative engineering organisation operating within the offshore wind and renewable energy sector to recruit a Principal Engineer - MV/HV Cable Design.This is a senior technical leadership role focused o...Read More>>.

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune...Read More>>.

Updated: 07 July 2026Freelance | 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 En...Read More>>.

10x Team is seeking a Freelance Principal Software Engineer – AI Trainer to remotely contribute 8–20 hours per week. You will review AI-generated outputs and refine recommendations for software architecture and coding standards.The role...Read More>>.

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune...Read More>>.

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital...Read More>>.

Principal Software Engineer - Python - Fully Remote (UK) Experienced Python Engineer needed for an early-stage Start-Up that is already profitable and looking to expand the founding team. You will be looking to work for a Start-Up and...Read More>>.

At National Grid Ventures, we're connecting countries, enabling the energy transition and helping create a cleaner, more secure energy future. Viking Link is the world's longest land and subsea interconnector and plays a critical role in connectin...Read More>>.

Overview As a senior Bridge Engineer in our Bridges and Civils team within our Transportation business based in Stockton, you will play a crucial role in shaping the future of transportation. We work on a number of exciting, high‑profil...Read More>>.