101 to 125 of 173 Principal Software Engineer Jobs in the UK

client is a major defence and aerospace company. Date Posted: 2026-10-15 Country: United Kingdom Location: Manchester, Lancashire Position Role Type: Unspecified Principal Software Engineer Location: Manchester Permanent Onsite Due to the interesting work we do and the sector this team is working in, we require … teams work synchronously with our customers to solve some of the toughest digital challenges faced in the world today. Role & Responsibilities Design and build software using industry best practice Collaborate with stakeholders and other engineers Contribute to the completion of milestones associated with your project Contribute to continuous improvement ...

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 ...

take their career to new heights. Join the ranks of top talent at one of the world’s most influential companies. As a Principal Software Engineer at JPMorganChase within the Chief Data & Analytics Office (CDAO) AI/ML Data Platforms Team, youprovide deep engineering expertise and work … checks, incident triage and root-cause acceleration), while defining guardrails for validation, security, resiliency, and reuse across teams. Applies knowledge of tools within the Software Development Life Cycle toolchain, including enterprise-authorized AI-assisted development and automation capabilities, to improve the value realized by automation at scale. Translates highly ...

TPXimpact is seeking a Principal Software Engineer to shape the technical direction of high-profile projects and lead delivery of modern, scalable software. You will mentor engineers across teams, line-manage a group, and collaborate with senior stakeholders to translate complex problems into robust solutions. We expect … deep experience across languages and frameworks, cloud platforms, and a proven track record in software architecture design. #J-18808-Ljbffr ...

Strategic Enterprise Technology Leadership Recognised Java Engineering Expertise Advanced Architecture & Systems Integration Capability What this role is all about We're looking for a Principal Software Engineer to join Vitality's Engineering function, providing technical leadership across complex enterprise platforms and customer-facing solutions. This … highly influential role responsible for shaping engineering standards, driving architectural decisions, leading large-scale technical initiatives and ensuring the successful delivery of integrated software solutions that support critical business outcomes. The role operates across multiple teams and works closely with senior stakeholders, architects and third-party partners to deliver ...

Northrop Grumman UK is seeking a Principal Software Engineer to design, develop, and maintain the critical infrastructure powering our services. You will lead multiple engineering teams, set technical direction, and deliver solutions with real customer impact. You’ll mentor engineers, collaborate with partners and customers, and ensure ...

Strategic Enterprise Technology Leadership Recognised Java Engineering Expertise Advanced Architecture & Systems Integration Capability What this role is all about We're looking for a Principal Software Engineer to join our client's Engineering function, providing technical leadership across complex enterprise platforms and customer-facing solutions. This … highly influential role responsible for shaping engineering standards, driving architectural decisions, leading large-scale technical initiatives and ensuring the successful delivery of integrated software solutions that support critical business outcomes. The role operates across multiple teams and works closely with senior stakeholders, architects and third-party partners to deliver ...

Corpay One, Inc. is seeking a Principal Software Engineer in London to lead technically across the Client Lifecycle domain. You will drive design, architecture, and delivery of secure, scalable systems, while remaining hands-on and mentoring engineers. The role emphasizes cloud-native architectures on AWS, data-driven ...

DeepCamp is seeking a Principal Software Engineer in the United Kingdom with hybrid remote flexibility. You will own architectural direction for major platforms and drive critical engineering efforts across backend, frontend, APIs and cloud infrastructure. The role requires deep expertise across distributed systems, system design, and leadership ...

Accenture Manchester is seeking a Principal Software Engineer to lead engineering workstreams across client projects, shaping delivery with a strong emphasis on quality and tangible outcomes. You will grow teams, mentor engineers, and collaborate with stakeholders to align technical solutions with business goals. Travel to client sites ...

ABOUT THE ROLE We're 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 ...

Defaqto is hiring a Principal Software Engineer in London to shape how we build software. You will lead the shift from AI-assisted coding to AI-led delivery, own high‐risk initiatives, and set engineering standards across the Technology function. The role reports to the Head ...

technology consultancy firm in Portsmouth is seeking a Principal Software Engineer to lead the design and development of applications across various sectors, including defence and health. The ideal candidate has over 15 years of experience with expertise in C/C++, C#, and Python, alongside strong stakeholder ...

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 ...

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 ...

JPMorgan Chase & Co. in London is seeking a Principal Software Engineer to lead agentic AI-enabled engineering workflows and deliver scalable, high-availability consumer features for millions of end users. You will collaborate with Product, Design, and Compliance teams to ensure secure, compliant, and customer-centric digital ...

Morgan Stanley in London seeks a Principal Software Engineer to own design, development and deployment of critical credit derivatives solutions. You will partner with trading, strats and COO teams to translate business needs into robust technical projects and to deliver features that raise trader efficiency and platform ...

looking for great people to join us, so please come and invest in YOUR future at Hargreaves Lansdown. About the role As a Principal Software Engineer in our Investment Growth Tribe, you’ll be a senior technical leader, playing a key role in our technology transformation. This ...

easyJet Airline Company PLC is seeking a Principal Software Engineer to lead the eCommerce Platform Delivery team. You will drive the technical vision, architecture, and delivery of high‐performance, secure systems across multiple squads. You will mentor engineers, champion best practices, and ensure platform resilience while collaborating ...

global AI-native consultancy is seeking a Principal Software Engineer to lead engagement delivery in the Energy & Commodities Trading sector. This hands-on role combines technical excellence and domain expertise, focusing on architecting scalable AI solutions that drive trading decisions. The successful candidate will work closely with ...

Simple Machines is a leading boutique technology firm seeking a Principal Software Engineer to design and deliver complex, scalable systems across backend, APIs, frontend, data pipelines, and cloud infrastructure. You’ll work with internal teams and client stakeholders, owning outcomes end-to-end in a consultative engineering ...

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 will mentor engineers, shape a long-term technical vision, and collaborate ...

Very Group is seeking an experienced Senior/Principal Software Engineer to lead technical direction across squads. You’ll shape what we build and how, collaborating with Product Managers, Architects and Engineers to tackle scalable, cloud-native challenges and deliver impactful customer experiences at scale. Expect ownership ...

JPMorganChase in the United Kingdom is seeking a Principal Software Engineer (Executive Director) to lead, design, and ship secure, scalable technology across complex data pipelines and APIs. You will influence senior stakeholders, set technical direction, and drive adoption of AI-enabled engineering workflows. This role emphasizes hands ...

that help scientific and enterprise customers automate complex physical workflows across laboratory instruments, robotics systems, scientific data, and cloud services. We are seeking a Principal Software Engineer to help design and build the Robotics Automation Platform. This is a senior hands-on individual-contributor role … engineer who can lead the design and implementation of core platform services while working closely with Product Management, Shared Experience & Authoring, Applied Science, OCI platform teams, customers, and automation vendors. You will build the foundation for the first Robotics Automation pilots and help establish a platform that can support ...