Overview In this role you design and build software and compiler frameworks to power AI models on cutting-edge hardware. You work closely with hardware engineers to ensure seamless interaction between custom processors and the platform they...Read More>>.

Overview In this role you will be the most senior hands-on technical expert for the Risk Screening platform, translating architectural intent into robust production systems. You’ll own non-functional characteristics like latency, scalabil...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 Principal Engineer, you will define engineering strategy and roadmaps, guiding large-scale, cloud-native systems to be scalable, secure, and resilient. You’ll influence multiple teams, mentor engineers, and drive modern delive...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 Principal Technical Engineer, you will design, implement, and secure scalable Kubernetes infrastructure while guiding a growing engineering team. You’ll shape cloud platform strategy, mentor engineers, and drive best practices...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 You lead and support a multi-discipline JV design and site engineering team on nuclear projects. You’ll engage with on-site and office-based teams to review design submissions, coordinate safety case-related activities, and ensur...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 In this role, you will lead engineering across Corporate Technology, defining strategy for People, Finance and Procurement platforms and driving secure, scalable, and well-managed services. You will mentor engineering leads, set ow...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 define DFT architecture for next-generation Arm IPs and SoCs, enabling scalable test across diverse architectures. You will drive reusable DFT methodologies and collaborate with architecture, implementation, verifi...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 In this role you will lead the definition and delivery of manufacturing electrical processes, diagnostic systems, software deployment, and vehicle commissioning across programmes. You own the technical delivery from requirements th...Read More>>.

Overview In this role you will lead the development of a greenfield buy/sell-side trading platform. You will design platform logic and execution algorithms to scale for much higher volumes, within a small, autonomous team. The position offe...Read More>>.

Overview In this role you will lead geotechnical projects from concept through construction within AECOM's Ground Engineering team in Manchester. You will apply cutting-edge ground investigation and design approaches, addressing slope stabi...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 will lead verification activities for mixed-signal ICs within the CSS domain at ADI. You’ll work across multiple business units to shape verification strategies, develop advanced testbenches, and drive issue res...Read More>>.

Overview In this role you will lead system safety and interoperability efforts for the Old Oak Common Station project, ensuring regulatory compliance and robust assurance across design, construction, and commissioning. You will coordinate w...Read More>>.

Overview In this Principal Engineer role, you will lead design delivery for allocated engineering work, ensuring on-time, on-budget outcomes aligned with client specifications. You’ll develop feasibility studies, design concepts, and tech...Read More>>.

Overview In this role you will steer technical direction for reporting solutions that help clients reconcile accounts, investigate transactions, and manage cash. You will lead architecture and implementation, mentor engineers, and drive cro...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 this role you will lead the design, integration, and technical assurance of chilled water systems on a complex marine platform, applying expertise in system performance and optimisation. You will drive robust, compliant solution...Read More>>.

Overview In this role you will lead the Integration Services capability for Internal Products, defining technical direction and building a sustainable shared services team. You will balance centralised reuse with domain autonomy, driving re...Read More>>.

Overview As Principal Installation Engineer, you will lead installation activities for subsea structures and related systems within the Installation and Project Engineering discipline of the Global Project Centre. You will represent the dis...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>>.

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>>.

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>>.

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>>.

At OSB Group, we are continuing to invest in our technology platforms to deliver exceptional customer experiences and support our growth ambitions. We are now recruiting for a Salesforce Principal Engineer to drive the development and evolu...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>>.

We're looking for a Principal Engineer (Electrical) to join our Water Sector team based in the UK. Location Flexible location, based from home or local office with nationwide travel. Hours Full time - some flexibili...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>>.

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>>.

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>>.

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>>.

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>>.

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>>.

Responsibilities include leading an engineering team and delivering high-quality outcomes Requirements include experience in C#, ASP.NET Core, and SQL Desirable experience with React or other front-end frameworks Location...Read More>>.

About the RoleWe are seeking a Lead / Associate Principal Automation & Verification Engineer to join the Motor Test Systems Team. The role may be offered at Lead Engineer or Associate Principal Engineer level depending on the skills, expe...Read More>>.