101 to 125 of 165 Principal Software Engineer Jobs in the UK

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 ...

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 ...

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 ...

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 ...

Principal Java Engineer (Hands-On) £70,000 - £85,000 + Bonus + Excellent Benefits Hybrid - 1 Day Per Week Onsite in South Manchester Java Spring Boot AWS Technical Leadership Please note: Visa sponsorship is not available for this position. We're working with an established technology business … South Manchester who are looking to appoint a Principal Java Engineer to play a key role in the conti click apply for full job details ...

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 ...

Principal/Senior Software Engineer x2 Inside IR35 Contract Rate: up to £800/day Location: Remote/London Duration: 6 months initially Description: The opportunity This is a contract engagement supporting a major Information Security AI transformation, a large programme that is modernising and automating … security operating model with agentic AI. We are looking for both a Principal and Senior hands‐on engineer to drive the build of a portfolio of agentic AI security applications, defining the solution architecture and contributing to the most complex components of the solution and system design. ...

Addition Solutions in Farnborough is seeking a Senior/Principal Embedded Software Engineer to join a highly skilled team. You will work on embedded software across software, FPGA and RF technologies in a defence/cyber context, contributing to research, ideation, prototyping and full product ...

Moog Aircraft Group is seeking a Senior Principal Software Engineer to lead the development of software for advanced flight control and actuation systems. You will influence architecture decisions, mentor teams, and ensure software meets the highest standards of reliability and certification. The role requires deep … expertise in safety-critical software, real-time embedded systems, and aerospace compliance. Hybrid work model in Tewkesbury, GBR with strong collaboration across hardware and systems #J-18808-Ljbffr ...

Selection (Holdings) Limited in Cambridge seeks a Principal Software Engineer to guide and contribute to cloud software development using C# and .NET. The role emphasises architecture, security, and scalable platform design, with hybrid working and a top benefits package. You will lead architectural decisions, work across ...