1 to 25 of 30 Permanent Principal Software Engineer Jobs in London

# Principal Software Engineer - Search Scaling - Elasticsearchat Elastic • London, United KingdomBack to jobs6d agoE## Principal Software Engineer - Search Scaling - ElasticsearchElastic00EngineeringFull-timeLondon, United Kingdom✓ Visa RelocationApply Job### Job DescriptionElastic, the Search AI Company, enables everyone to find the answers they need in real time, using … cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI.What is The Role: We're looking for a Principal Software Engineer to join the Elasticsearch - Search Scaling team. This globally-distributed team of experienced engineers focuses on delivering a robust ...

Role Summary We are seeking an exceptional Principal Software Engineer – AI Native to lead the design, development, and delivery of business‐critical software platforms across Aventum Group. This is a hands‐on leadership role for a highly experienced software engineer who combines deep technical … with an AI‐first mindset. You will be responsible for architecting scalable solutions, driving engineering excellence, and leveraging AI‐native development practices to accelerate software delivery and innovation across the business. As a Principal Engineer, you will act as a technical authority across multiple initiatives, influencing architecture ...

Principal Software Engineer/Principal AI Engineer Embedded Innovation Teams are cross‐functional squads embedded within our segments to rapidly turn internal AI experimentation into validated, reusable solutions, building the capabilities we need to deliver customer value and growth. We work problem‐first rather than … inside segment and function teams, improving the internal workflows that help our people deliver better outcomes for customers, faster. About the role As a Principal AI Engineer, you will be the technical lead for an embedded Innovation Squad, owning technical execution from discovery through to production. You will ...

Principal Software Engineer – Go | Distributed Systems £160,000-£200,000 + 15% bonus + Equity Go/Python/Rust - Kubernetes, AWS, Distributed Systems Hybrid (Central London, 3 days a week in office) Broad/Complex Technical Environment Well-funded Series B deep-tech company … partnered with a well-funded deep-tech scale‐up transforming the life sciences industry by Accelerating scientific discovery. They blend hardware, software and AI as a platform to increase efficiencies in an industry where time can truly save lives. Responsibilities They’re hiring a Principal Software Engineer ...

have within the community. Salary: £80,200 - £120,400 The Opportunity This is more than just a job; it’s a mission. As a Principal Software Engineer, you will play a pivotal role in designing, developing, and maintaining the critical infrastructure that powers our services. You will … meet customer needs. “My purpose is to lead a team of engineers, rise to the challenges presented, push the boundaries and define possible together.” – Principal Software Manager, Northrop Grumman UK What You’ll Do Take ownership of multiple teams’ deliverables and work with technical leads to define ...

Elsevier in London is seeking a Principal AI Engineer/Principal Software Engineer to lead an embedded Innovation Squad, driving from discovery to production and transforming AI prototypes into reusable patterns and starter kits. You will shape agentic AI patterns (orchestration, memory, retrieval), mentor engineers ...

Principal Software Engineer, Mobile (React Native) Nine Elms, London - Full-time (5 days a week on-site) About the company the company is London’s leading premium convenience retail platform. Founded in 2020, our vision is to disrupt the multi‐trillion dollar convenience retail market, currently dominated … development is part of the daily toolkit here, and we ship LLM‐powered features where they genuinely make the product better. The Role As Principal Mobile Engineer you own the technical direction of our consumer iOS, Android and web apps, all built on React Native. This ...

Principal Engineer Location : Waterloo, London, England, UK | Hybrid (1 day per week in office) Who You Are You’ve shown long-term repeated success on a variety of projects, typically over the course of 10+ years. You are a trusted expert and leader, often called upon to guide … infrastructure, authentication, and observability Delivered on high‐stakes consulting engagements across multiple language paradigms, stacks, ecosystems, and client industries Built high‐quality, maintainable software collaboratively, incrementally, and through an approach tailored towards the unique needs of the clients you’ve served Led the development and delivery of production‐grade ...

part of the M&S Software Engineering team, you’ll be joining a well-loved British brand, working on solutions that serve millions of loyal customers and thousands of colleagues. With ethical values at the heart of the business and technology leaders who understand modern software engineering, this … exciting time to join us as we become a digital-first, engineering-led organisation. We are looking for a Principal Software Engineer to provide senior technical leadership across our International Fashion, Home & Beauty domain. You will shape and modernise mission-critical platforms that support international growth, working ...

Marks & Spencer Plc’s Software Engineering team is seeking a Principal Software Engineer to provide senior technical leadership across our International Fashion, Home & Beauty domain and shape mission-critical platforms for international growth. You will set technical direction, drive scalable and secure solutions, mentor engineers ...

Morgan Chase. AI Engineering tackle business critical priorities using innovative machine learning techniques and technologies with a focus on machine learning for Software, Cybersecurity and Technology Infrastructure. The team partners closely with all lines of business and engineering teams across the firm to execute long-term projects in these … areas that require significant machine learning development to support JPMC businesses as they grow. As a Principal Software Engineer at the company within CDAO Technology Group in the Applied Innovation (of AI) Engineering team, you will design, develop, deploy, and maintain advanced AI products. You\'ll collaborate ...

Role Purpose We are seeking a highly experienced Principal Software Engineer to provide technical leadership across our technology function, driving the design, delivery, and continuous improvement of enterprise applications and digital services. This is a senior hands‐on role for an individual who combines deep technical expertise … design and architecture of scalable, secure, and resilient enterprise applications, ensuring alignment with business and technology strategies. Drive Technical Leadership – Define and champion software engineering standards, architectural patterns, best practices, and reusable frameworks across the engineering community. Own Delivery Outcomes – Lead complex technology initiatives from concept through to deployment ...

United States Digital Space LLC is seeking a Senior Principal Software Engineer to drive the development and enhancement of trusted technology products. This role requires proven software engineering experience, expertise in programming languages including Java and Python, and the ability to lead multi-organization adoption ...

right place. JP Morgan Chase’s ambitions for AI/ML are transformational, but safety and security are non negotiable. As a Principal Software Engineer within AI Governance Engineering, you will design and build platforms and shared services that enable teams to develop, deploy, and operate … reduces friction and operational toil while raising the firmwide standard for security, reliability, auditability, and responsible AI. This role is suited to a Senior Engineer who can operate as a technical leader across multiple teams—defining architecture, influencing standards, and delivering high impact software that scales. Job Responsibilities ...

JPMorgan Chase in the UK seeks a Principal Software Engineer to drive AI-enabled development for the International Consumer Bank, delivering scalable, secure software for millions of users with high availability and low latency. You will lead design efforts, collaborate with Product, Design and Compliance teams ...

Software Engineer - Secure Cloud & Data Platforms The Role As a Software Engineer, you will play a key role in developing backend platforms and services using modern commercial and open-source technologies across both private and public cloud environments. Working within an Agile, cross-functional team … opportunity to contribute to sensitive projects Inclusive and supportive culture recognised for putting people first This is an excellent opportunity for an experienced engineer looking to work on cutting-edge cloud and data platforms while contributing to meaningful, real-world outcomes. If you are interested please apply online. Reasonable ...

helps you realize your potential. Our team is key to our success. We’re people-first. We value collaboration, curiosity and commitment. As a Principal Software Engineer at JPMorgan Chase within the Accelerator Business in the Platform Team, you are the heart of this venture, focused … term architectural strategy for platform engineering, ensuring competitive advantage and scalability. Mentor and coach senior engineers across teams, elevating the technical bar and championing Software Engineering Communities of Practice. Serve as the key technical liaison for product, business, and security stakeholders, translating technical decisions into business impact. Lead ...

Elastic is seeking a Principal Software Engineer focused on Search Scaling in London, United Kingdom. This role involves leading and contributing to the evolution of Elasticsearch, enhancing search and indexing capabilities. The ideal candidate will have significant experience in distributed systems and sophisticated search platforms. They will ...

Docker is seeking a Principal Software Engineer to lead the Docker Agents initiative. You will design scalable, distributed systems for AI agents in containers, and mentor engineers across a remote‐first team. The role emphasizes open‐source evolution, reliability, and secure runtimes. Responsibilities include defining the long ...

helps you realize your potential. Our team is key to our success. We're people-first. We value collaboration, curiosity and commitment. As a Principal Software Engineer - Applied AI ML Director at the company within the Accelerator Business, you are the heart of this venture, focused ...

JPMorgan Chase is seeking a Principal Software Engineer within the International Consumer Bank to deliver scalable, secure consumer-facing features with high availability and low latency. You will collaborate with Product, Design and Compliance teams to ship customer-centric solutions that meet regulatory standards while leveraging enterprise ...

building the bank of the future from the ground up, offering you the chance to join us and make a significant impact. As a Principal Software Engineer at JPMorgan Chase within the International Consumer Bank, you will play a crucial role in this initiative, dedicated to delivering … possess an interest in the financial sector and focus on addressing our customer needs. Job Responsibilities Creates complex and scalable coding frameworks using appropriate software design frameworks. Develops secure and high‐quality production code, and reviews and debugs code written by others. Architects and governs agentic AI‐enabled engineering ...

building the bank of the future from the ground up, offering you the chance to join us and make a significant impact. As a Principal Software Engineer at JPMorgan Chase within the International Consumer Bank, you will play a crucial role in this initiative, dedicated to delivering … possess an interest in the financial sector and focus on addressing our customer needs. Job responsibilities Creates complex and scalable coding frameworks using appropriate software design frameworks. Develops secure and high-quality production code, and reviews and debug code written by others. Architects and governs agentic AI-enabled engineering ...

leading technology firm in Greater London is seeking a Principal Software Engineer to design, develop, and maintain critical infrastructure. This role involves ownership of team deliverables, collaboration with external partners, and mentoring engineers. Candidates must have strong capabilities in backend and frontend development, design scalable systems ...

Role: MS Power platform Principal Software EngineerLocation: London,UKJon Type: Permanent (Hybrid - 4 days office Mandatory)KEY ACCOUNTABILITIESPrimary technical point of contact for the applications in scope of this roleRepresent Software Engineering CoE in discussions and forums such as architecture and design forums, governance forums, security etc.Collaborate … party teams to assess environment compatibility, highlight risks, and propose mitigations.Ensure the applications are built in adherence to Intact, and established industry standards for software developmentDocument technical learnings, configurations, and application knowledge for knowledge retention, person dependency reduction, and future transitionBuild proofs of concept, work on architecture, design, development ...