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 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 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 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>>.

Overview In this role you shape how AI is embedded across Arm’s engineering platforms and workflows, driving scalable, secure AI architectures. You will translate fast-moving AI capabilities into reusable patterns and target architectures...Read More>>.

Overview As Principal Engineer you will lead the Highway Developments and Implementation team to ensure private developments are designed and delivered to high highway standards. You will act as a specialist adviser to developers and coordi...Read More>>.

Overview In this Principal Engineer role, you shape technical direction across the Surveillance estate while remaining hands-on. You’ll balance deep technical work with guiding senior engineers, ensuring architecture coherence, security p...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>>.

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>>.

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>>.

Galliford Try is seeking a Process Principal Design Engineer (Drinking Water Biased) to lead multidisciplinary design delivery across UK water projects. You will drive technical excellence, mentor engineers, and ensure compliance with H&S and CDM...Read More>>.

OverviewJob Description Summary The energy transition drives an unprecedented growth in demand for and generation of electricity. To accommodate this growth, the capacity of transmission system is projected to grow three-fold. High vol...Read More>>.

AL8238 UK Grid Solutions Limited is seeking an experienced Principal Engineer – Control System Performance to drive HVDC technology development. This role involves leading the NPI programs and acting as a technical authority within HVDC control...Read More>>.

Job Description SummaryAs a Principal Engineer, you will report to the HVDC Valve Engineering Global Leader within the Product Delivery Group (PDG) of Grid Systems Integration (GSI) in GE Vernova. The purpose of this senior-level engin...Read More>>.

Primary Location: UK - Birmingham - Colmore PlazaCompany DescriptionWork with Us. Change the World.At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, provid...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>>.

Were currently recruiting 5 Principal Engineers Support Engineering (Training Services) to support a Submarine Programme. This is a predominantly remote/hybrid position, with occasional travel to site as required by the programme....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>>.

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>>.

Roche in the United Kingdom is seeking a Principal/Senior Principal Software Engineer within the Computational Sciences Center of Excellence. You will design and build scalable, data-centric platforms that accelerate drug discovery, collaborating...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>>.

About the role We're working with a leading foundational AI lab to find experienced software engineers who can help train their latest language model on software development tasks. We're looking for Senior Software Engineers with 5+ years...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>>.

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>>.

Principal Engineering Platform AI ArchitectJob Overview:The Principal Eng Plat AI Architect sets direction for how AI is embedded across Arm's engineering platforms, toolchains and workflows. Reporting to the Director of Engineering...Read More>>.

Requisition ID12683-Posted07/10/2026-Consulting-Birmingham - International Design Hub, Colmore Plaza Amey are a leading provider of full life-cycle engineering, operations and decarbonisation solutions, for trans...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>>.

Neulinx, partnering with a growing AI-powered SaaS company, is hiring a Principal Engineer who will own architecture and drive engineering decisions across software, cloud, and DevOps. This senior IC role emphasizes hands-on leadership without peo...Read More>>.

Senior Principal EngineerLocation: Dublin, IrelandJob Type: PermanentSector: Roads, Transportation & InfrastructureThe Opportunit...Read More>>.