151 to 175 of 245 Principal Software Engineer Jobs in the UK

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 ...

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 ...

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 ...

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 ...

products and systems scale, we need technical leaders who can solve difficult engineering problems and raise the engineering bar around them. The Principal Software Engineer owns technical direction and execution for major products and systems . This is a hands-on role - you will design systems, write … design, testing, security, observability and development practices. Leading technically critical initiatives and mentoring engineers across teams. What We're Looking For 7+ years of software engineering experience building and shipping production systems. Deep expertise in backend, frontend, distributed systems, APIs, databases or cloud infrastructure. Strong system design and architecture ...

KIRA builds technology products used by millions in Southeast Asia. As our products scale, we seek a Principal Software Engineer to own technical direction and drive major systems from design to production. This hybrid role in the United Kingdom requires strong English communication, hands-on coding ...

directly with Raytheon UK to hire for this role. Date Posted: 2026-08-13 Country: United Kingdom Location: Manchester, Lancashire Position Role Type: Onsite Principal Software Engineer Location: Manchester Permanent Onsite/Hybrid (min 3 days a week on site) Due to the interesting work ...

with Raytheon UK to hire for this role. Date Posted: 2026-08-11 Country: United Kingdom Location: Gloucester, South Gloucestershire Position Role Type: Onsite Principal Software Engineer Gloucester/Manchester Onsite Due to the interesting work we do and the sector this team is working ...

generation physiological monitoring solutions, the business is transitioning from advanced product development towards regulatory approval and commercial launch. We are looking for an experienced Principal Software Engineer to provide technical leadership click apply for full job details ...

AALTO in Farnborough is seeking a Principal Software Engineer to lead embedded software across the full lifecycle in a safety-critical domain. You’ll design, implement, verify and maintain avionics software in C, with C++ and Python as supporting tools, working close to product teams ...

Principal Software Developer in Test (SDET)Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: PermanentDrive test automation innovation and engineering excellence in financial technologyThe RoleAs a Principal Software Developer in Test (SDET) at Capco, you'll lead the strategy, architecture, and implementation of robust test automation … enabled ways of working, encouraging the responsible use of approved AI and automation tools to improve engineering productivity, accelerate test delivery, and enhance software quality while ensuring appropriate governance, human oversight, and responsible AI practices.What You'll DoArchitect reusable, scalable test automation strategies and frameworks across web, mobile ...

Principal Software Developer in Test (SDET)Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: PermanentDrive test automation innovation and engineering excellence in financial technologyThe RoleAs a Principal Software Developer in Test (SDET) at Capco, you'll lead the strategy, architecture, and implementation of robust test automation … enabled ways of working, encouraging the responsible use of approved AI and automation tools to improve engineering productivity, accelerate test delivery, and enhance software quality while ensuring appropriate governance, human oversight, and responsible AI practices. What You'll DoArchitect reusable, scalable test automation strategies and frameworks across web, mobile ...

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 ...

Role We’re looking for experienced Principal Software Engineers who enjoy solving complex technical challenges, building scalable systems, and helping engineering teams deliver high-quality software in production environments. This role sits at the intersection of software engineering, architecture, and cloud/platform engineering. … designing, building, and guiding the delivery of modern software solutions using technologies such as Java, Python, C#/.NET and TypeScript , while working closely with engineering teams to ensure solutions are scalable, secure, and maintainable. It’s a strong fit for someone who enjoys taking ownership of technical direction ...

AVEVA is creating software trusted by over 90% of leading industrial companies.Job Title: Principal Software EngineerLocation: Cambridge, United Kingdom – Hybrid Employment Type: Full Time The Job As part of the E3D development group, you’ll be responsible for maintaining and enhancing applications that support both desktop … communal best practices.Demonstrate sound decision making on individual and team workloads to ensure it is delivered in a timely manner.Essential RequirementsExperience developing professional software applications using C++ and/or C#.Awareness of industrial engineering and/or factory plant design.Comfortable with source control systems (GIT) and automated build pipelines ...

development laboratories, manufacturing facilities and employees in multiple countries committed to serving patients worldwide. Please visit www.jazzpharmaceuticals.com for more information. Brief Description The Principal, Cloud Software Engineer will be responsible for designing, developing, and maintaining modern healthcare-focused applications that support clinical, research, and enterprise RnD AAAI … enabled web applications and APIs within an AWS cloud environment, with a strong emphasis on product development, user experience, and delivery of intelligent software solutions. Essential Functions Design, develop, and maintain full stack web applications using Python, Java, C++ and modern frontend frameworks. Build scalable backend services and APIs ...

drive solutions through to completion to develop the electronic systems for the next generation of Dyson products.About the RoleWe are looking for an Associate Principal Embedded Software Engineer to join the Power Electronics discipline of our Research team, based in Malmesbury, Wiltshire, U.K.The Associate Principal role … means being a technical leader in efficient embedded software in at least one field of power electronics such as motor control, power conversion, battery management, etc.You will be working within a team of multidisciplinary engineers taking new ideas to a prototype level prior to transfer to our development teams.The ...

consumers. If you believe the best way to do your job hasn’t been invented yet, you’ll fit right in.About the RoleThe Principal Software Engineer, Mobile is SharkNinja's deepest technical authority on mobile engineering — the person others come to when the patterns don't exist … with no established playbook, ensuring the platform is built for the AI-powered features SharkNinja will ship next.What You'll Bring12+ years of progressive software engineering experience, with deep expertise in native iOS (Swift), Android (Kotlin), and React Native.A track record of solving the hardest mobile engineering problems — architecture ...

This is an excellent opportunity to gain more experience as a principal engineer or step up into the role for the first time. This design group are well known for not only developing innovative HealthTech devices but working from initial concept through to production. With plenty of domain … they need is a technical leader who can see the full picture. You don't need to have HealthTech experience to apply. As a principal engineer, you will play a pivotal role in developing cutting-edge products, ensuring that they meet business and regulatory requirements while delivering innovative ...

Lead a team of talented engineers to build the technology of tomorrow This is an excellent opportunity to gain more experience as a principal engineer or step up into the role for the first time. This design group are well known for not only developing innovative HealthTech devices … what they need is a technical leader who can see the full picture. You dont need to have HealthTech experience to apply. As a principal engineer, you will play a pivotal role in developing cutting-edge products, ensuring that they meet business and regulatory requirements while delivering innovative ...

Role: Principal Software EngineerLocations: Manchester (must be willing to travel to client sites throughout the UK on an ad hoc basis)Level: Manager Salary: Competitive salary and package (Depending on level of experience)Accenture is a leading global professional services company, providing a broad range of services … with the communities in which we work and live. It is personal to all of us.” – Julie Sweet, Accenture CEO As a team:Accenture Software & Platform Engineering is over 1,000 people strong and provides end-to-end product engineering solutions which deliver tangible value, fast. We bring together ...

Principal Engineer is the most senior individual contributor in engineering, setting technical direction, leading architectural decisions and aligning technology investment with business strategy. They combine deep technical expertise with mentorship and broad organisational influence to enable secure, resilient and maintainable solutions. Aligned to the People & Labour sub-domains … effectively. Drive operational excellence through improved observability, resilience, incident management, CI/CD, developer experience and the adoption of AI across the product and software development lifecycle. Who you are Your skills and experience will include: Extensive experience in system design, architecture and technical leadership across complex, business-critical ...

Principal Engineer is the most senior individual contributor in engineering, setting technical direction, leading architectural decisions and aligning technology investment with business strategy. They combine deep technical expertise with mentorship and broad organisational influence to enable secure, resilient and maintainable solutions.Aligned to the People & Labour sub-domains, this … effectively.• Drive operational excellence through improved observability, resilience, incident management, CI/CD, developer experience and the adoption of AI across the product and software development lifecycle.Who you areYour skills and experience will include:• Extensive experience in system design, architecture and technical leadership across complex, business-critical domains.• Proven ...

Principal Engineer at M&S, you’ll play a critical role in shaping our technical direction and delivering against our strategic goals. Acting as a senior technical leader, you’ll drive engineering excellence, influence architecture, and align technology decisions with business priorities.You’ll join our Personalisation product group ...

game-changing career, working for one of the world's leading financial institutions, you've come to the right place. As a Principal Software Engineer at JPMorgan Chase within the Corporate Sector, you provide expertise and engineering excellence as an integral part of an agile data engineering … best-in-class outcomes across various technologies to support one or more of the firm's portfolios. This role is suited to a senior engineer who has hands-on skills to lead across multiple teams-defining architecture, engineering practices and standards, and delivering high-impact software that scales. ...