1 to 25 of 26 Principal Engineer Jobs in London

Principal AI Engineer | Up to £130K | Hybrid in London (3 Days Onsite) | Our client is an AI-native engineering firm trusted by major enterprises to build and operationalise scalable AI platforms. With a unique mix of technical depth and proven delivery frameworks, they enable clients to unlock measurable value from AI at scale. As a Principal AI … Engineer, you’ll be the driving force behind the architecture and delivery of large-scale AI systems. You’ll set the technical vision, mentor cross-functional teams, and work closely with senior stakeholders to turn high-impact ideas into production-ready solutions. This is a chance to shape how AI is built and adopted at enterprise scale. Key Responsibilities … Python engineering skills + FastAPI, CI/CD, MLOps, LLM tooling Leadership across cross-functional engineering teams If you are Interested, apply directly or reach out to jonah.brookes@oliverbernard.com Principal AI Engineer | Up to £130K | Hybrid in London (3 Days Onsite More ❯

Principal Software Engineer Location: London - 1x a month Salary: £95,000 - £120,000 + equity + benefits An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation digital solutions. This is an opportunity to shape greenfield projects from the ground … do I need to be successful? Degree in Computer Science or equivalent hands-on experience. 7+ years' experience in backend software development, including several years in a senior or principal-level engineering role. Expertise in Python (or a similar backend language), with proven experience designing distributed systems, APIs, and microservices at scale. Deep understanding of software architecture, cloud infrastructure More ❯

Principal Software Engineer Location: Remote first (Occasional travel to London) Salary: £95,000 - £120,000 + equity + benefits An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation digital solutions. This is an opportunity to shape greenfield projects from … do I need to be successful? Degree in Computer Science or equivalent hands-on experience. 7+ years' experience in backend software development, including several years in a senior or principal-level engineering role. Expertise in Python (or a similar backend language), with proven experience designing distributed systems, APIs, and microservices at scale. Deep understanding of software architecture, cloud infrastructure More ❯

SAP Principal Systems Engineer Day Rate: £550 Inside IR35 Location: Birmingham (preferred) | London or Salford with travel to Birmingham Contract: 6 months Hybrid: 1-2 days per week onsite Hours: Monday-Friday, 35 hours About the Organisation Join a major enterprise-level organisation operating at the forefront of media and technology innovation. This is an opportunity to contribute … large-scale transformation within a complex environment, working on high-profile HR systems change programmes that support thousands of users. The Role We're looking for an experienced SAP Principal Systems Engineer to lead on the planning, design, integration, testing and delivery of critical SAP HR systems. You'll play a key role in a significant HR transformation … consultancy across multiple projects, shaping solutions and supporting decision-making. Drive improvements across systems and processes, contributing to long-term technical roadmaps. Oversee SIT and UAT activities from a principal engineering perspective. Manage relationships with suppliers and partners, including large-scale delivery partners. Produce, review and approve technical documentation. Support the introduction of emerging technologies and lead cross-functional More ❯

Principal Software Engineer Location: London - 1x a month Salary: £95,000 - £120,000 + equity + benefits An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation digital solutions click apply for full job details More ❯

New Job Opportunity - Principal Telecoms Engineer - Initial 12 Month Outside IR35 Contract Our Client has a requirement for a Principal Telecom Engineer , who will be required to work on a contract basis in Woking. Location : Central London, SW1V 1PX Contract Length: Initially 12 Months IR35 Status: Outside IR35 Requirements : 5 days per week in office (from … time to understand requirements in detail and offer sound advice to both clients and candidates. We actively recruit at all levels and this is a superb opportunity for a Principal Telecom Engineer looking for new employment. As part of putting people first, we strive to be an equal opportunities employer and we are always looking to increase the More ❯

Principal Software Engineer (Java) London – 1 day a week onsite 🚀 Join a FinTech Powering the Future of Payments Are you a seasoned individual contributor looking for a step up into a senior position within a high-performing team within the world of Banking/Payments? Are you passionate about high-throughput, real-time systems? This is your opportunity … or more if you’d like!) 🌍 Opportunity to collaborate with major global banks 🚀 Fast-paced, product-led environment where your voice matters If you're a motivated Senior/Principal/Staff Java Software Engineer ready to tackle complex challenges and deliver meaningful change, hit apply – and shape the future of payments with us. More ❯

We are seeking a Principal Engineer/Engineering Manager to lead one of the core engineering teams within Planning Agent , our AI-powered advertising planning platform used daily by IPG agency teams. You will help shape and grow a product with AI at its core, using agents to power an AI assistant advertising planners throughout their workflow. You More ❯

business, understand our clients' needs and maintain our professional, supportive and entrepreneurial working culture that we all enjoy. What You'll Do We're looking for a highly skilled Principal Engineer with a passion for data, cloud technologies, and building robust, scalable solutions - who also brings strategic product thinking and cross-functional leadership . In this role, you More ❯

Principal Python Engineer London Permanent Hybrid Ncounter is supporting a global investment firm in hiring a Software Developer to help design and evolve internal compute frameworks that underpin their trading and research platforms. This is a high-impact role, working at the intersection of software engineering and distributed systems, with the opportunity to build scalable tools and frameworks … CD automation This role offers the chance to work on complex technical challenges at scale, with direct impact on high-performance computing platforms. If you re a skilled Python engineer with distributed systems expertise and want to join a world-class engineering environment, apply today for a confidential conversation. More ❯

Principal Python Engineer London | Permanent | Hybrid Ncounter is supporting a global investment firm in hiring a Software Developer to help design and evolve internal compute frameworks that underpin their trading and research platforms. This is a high-impact role, working at the intersection of software engineering and distributed systems, with the opportunity to build scalable tools and frameworks … CD automation This role offers the chance to work on complex technical challenges at scale, with direct impact on high-performance computing platforms. If you’re a skilled Python engineer with distributed systems expertise and want to join a world-class engineering environment, apply today for a confidential conversation. More ❯

Principal Engineers provide technical leadership at Amazon.com. They help establish technical standards and drive Amazons overall technical architecture, engineering practices, and engineering methodologies. They work on our hardest problems, building high quality, architecturally sound systems that are aligned with our business needs. They think globally when building systems, ensuring Amazon.com builds high performing, scalable systems that fit well together. … Principal Engineers are pragmatic visionaries who can translate business needs into workable technology solutions. Their expertise is deep and broad. They are hands on, producing both detailed technical work and high-level architectural designs. Basic Experience Knowledge of object-oriented design, data structures, and algorithms Experience (non-internship) in professional software development Preferred Experience Experience designing and building large More ❯

Principal Engineers provide technical leadership at They help establish technical standards and drive Amazons overall technical architecture, engineering practices, and engineering methodologies. They work on our hardest problems, building high quality, architecturally sound systems that are aligned with our business needs click apply for full job details More ❯

CONTRACT DATA ENGINEER - eDV CLEARED NEW CONTRACT OPPORTUNITY AVAILABLE WITHIN A LEADING NATIONAL SECURITY COMPANY FOR A DATA ENGINEER WITH eDV CLEARANCE Contract job opportunity for a Principal Data Engineer National Security client Daily rate up to £900 Central London based organisation in an easily accessible location To apply please call/or email WHO WE … ARE? We are recruiting a contract Data Engineer to work with a National Security SME in central London. Due to the nature of the work, you must hold enhanced DV Clearance. WE NEED THE DATA ENGINEER TO HAVE.... Current enhanced DV Security Clearance Experience with big data tools such as Hadoop, Cloudera or Elasticsearch Experience With Palantir Foundry … environment with tools such as Confluence/Jira Experience in design, development, test and integration of software Willingness to learn new technologies IT WOULD BE NICE FOR THE DATA ENGINEER TO HAVE.... Cloud based architectures Microservice architecture or server-less architecture Messaging/routing technologies such as Apache Nifi/RabbitMQ TO BE CONSIDERED.... Please either apply by clicking More ❯

About The Role Deadline for applications: 11:59pm on 31st October 2025 Were looking for a Principal Software Engineer to shape the technical direction of high-profile projects and lead the delivery of modern, scalable software. We use technology to create impactful, human-centred solutions that make a difference to users and organisations. We believe great engineering happens … project risks, helping teams navigate complex technical challenges. About You Professional knowledge and experience Essential Extensive experience in software engineering, with a focus on large-scale, complex systems. Polyglot engineer comfortable working across multiple languages and frameworks (weve used Python, Java, Kotlin, Node.js, C#, JavaScript, Express, React and Next.js to name a few). Passion for learning new technologies More ❯

in design, manufacturing, and operations — empowering engineers to push the boundaries of possibility. Our customers include leading innovators in Aerospace & Defense, Materials, Energy, Semiconductors, and Automotive. The Role The Principal Software Engineer role at PhysicsX is an individual contributor role with leadership and collaboration expectations. The Principal is expected to be an effective technical thought-partner to … The AI Workbench product group develops and maintains the modelling, optimisation, and inference components of the PhysicsX platform, creating efficient environments for model development and deployment by our ML Engineer and Data Scientist users. It works closely with our Research group to integrate new research into our modelling libraries and applications. What You Will Do Engage with the product More ❯

collaboratively to offer specialist advice, best practice and technology to all areas of our business specifically designed for our global reach. About the Role We’re looking for a Principal Data Engineer to play a leading role in shaping and implementing our enterprise data architecture. This position is ideal for someone who combines deep technical expertise with strong More ❯

About The Role Deadline for applications: 11:59pm on 31st October 2025 Were looking for a Principal Software Engineer to shape the technical direction of high-profile projects and lead the delivery of modern, scalable software. We use technology to create impactful, human-centred solutions that make a difference to users and organisations click apply for full job More ❯

About The Role Deadline for applications: 11:59pm on 31st October 2025 Were looking for a Principal Software Engineer to shape the technical direction of high-profile projects and lead the delivery of modern, scalable software. We use technology to create impactful, human-centred solutions that make a difference to users and organisations. We believe great engineering happens More ❯

About The Role Deadline for applications: 11:59pm on 31st October 2025 Were looking for a Principal Software Engineer to shape the technical direction of high-profile projects and lead the delivery of modern, scalable software. We use technology to create impactful, human-centred solutions that make a difference to users and organisations. We believe great engineering happens More ❯

About WeBuild-AI: WeBuild-AI are AI natives delivering 10x value for enterprise organisations. We combine highly skilled experts with our AI Launchpad , industry-aligned language models, and agents to transform enterprise organisations into AI-powered and data-driven businesses More ❯

Join Our Client as a Principal Control Systems Engineer (Perm/Fixed Term) Are you a seasoned control systems professional with a passion for innovation and a background in defence or highly regulated industries? An exciting opportunity awaits to become a key contributor within a leading organisation dedicated to delivering advanced naval platform management solutions. Our Client is … development, and advancement within a supportive environment. Be part of a forward-thinking organisation that values innovation, diversity, and inclusivity. Application Process If you are an experienced control systems engineer ready to take on the challenges of a regulated defence environment, we would love to hear from you. Please submit your CV for review, and our recruitment team will More ❯

Test Engineers play a critical role in Vitality’s successful business model by planning and executing tests on products and features to validate that they are fit for purpose.The Principal test engineer leads and plans testing across large or multiple teams, providing expertise in many technical areas or specialisms with very deep knowledge in a particular technical area. More ❯

Engineers play a critical role in Vitality’s successful business model by planning and executing tests on products and features to validate that they are fit for purpose. The Principal test engineer leads and plans testing across large or multiple teams, providing expertise in many technical areas or specialisms with very deep knowledge in a particular technical area. More ❯

We are looking for a Principal FPGA Design Engineer to lead complex FPGA developments from system requirements through to fully verified hardware. This is a senior, hands-on technical leadership role within a high-performance engineering team. Key Responsibilities Lead FPGA architecture and end-to-end VHDL design Define system-level requirements and implement robust solutions Develop test More ❯