1 to 25 of 38 Principal Software Engineer Jobs in the UK

Principal Software Engineer/Developer (C# .Net AWS Python) London/WFH to £130k Would you like to join a growing and profitable scale-up that is viewed as a leading FinTech disruptor in a senior role that will allow you a great deal of influence … progression? As a Principal Software Engineer you will architect and build highly performant and scalable solutions using the Microsoft tech stack and SOLID design principles, collaborating with cross functional Agile project teams in 2 week Sprints, you'll be an advocate of best practice and ensure software ...

inclusive employer and a member of myGwork – the largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly. Principal Browser Software Engineer Description - HP Wolf Security is changing the future of endpoint security through delivering secure PCs with advanced hardware-enforced security … features. We are growing the R&D team in Cambridge, UK and we're looking for Principal level browser software engineer to join the HP Wolf Security R&D team. You will be designing and developing our innovative security solution based on micro-virtualization and contributing ...

Principal Software Engineer (Contract) - Naval Radar BAE Systems (Defence Solutions) | Cowes, Isle of Wight | 6 months | Inside IR35 BAE Systems (Defence Solutions) is seeking an experienced Principal Software Engineer to support the development, maintenance and enhancement of advanced naval radar systems in service with … Royal Navy . Based full-time onsite in Cowes , you'll provide technical leadership across the software lifecycle, working within a large, established engineering environment. Key details Location: Cowes, Isle of Wight (full-time onsite) Contract length: 6 months initially IR35: Inside IR35 Rate: £54.57/hour PAYE ...

PRINCIPAL SOFTWARE ENGINEER FULLY REMOTE PERMANENT ROLE SALARY - CIRCA £100K + BENEFITS Your new role We're looking for a Principal Software Engineer to join a high-growth technology business building an AI-powered digital platform operating at significant scale.This is a senior hands … role combining software engineering, architecture and DevOps. You'll own complex product engineering initiatives while also influencing the wider cloud platform, infrastructure and engineering standards. What you'll need to succeed What you'll be doing * Designing and delivering scalable product features end-to-end. * Remaining hands-on across ...

Principal Software Engineer Financial services | London | Hybrid, 6 days onsite per month Package: £75-£95k + 10% pension + 10% cash allowance + bonus + benefits pack. Were recruiting a Principal Software Engineer for a financial services organisation investing in its digital products … work closely with product, business and architecture stakeholders. Improve existing systems through practical, measured changes rather than relying on wholesale redesign. Requirements Significant software engineering experience and a track record of delivering large-scale enterprise web applications. Deep experience with Java, Spring Boot, microservices, ReactJS, SQL, MongoDB, DevOps ...

Principal Software Engineer (Contract) - Naval Radar BAE Systems (Defence Solutions) Cowes, Isle of Wight 6 months Inside IR35 BAE Systems (Defence Solutions) is seeking an experienced Principal Software Engineer to support the development, maintenance and enhancement of advanced naval radar systems in service with ...

Principal Software Engineer Financial services London Hybrid, 6 days onsite per month Package: £75-£95k + 10% pension + 10% cash allowance + bonus + benefits pack. We're recruiting a Principal Software Engineer for a financial services organisation investing in its digital products ...

have a growing international footprint and are one of Europe's fastest-growing engineering businesses. About the role We are looking for a Principal Software Engineer to build the Internal Developer Platform that our engineering teams depend on - a platform built from the ground up for agentic … engineering. Our software teams work on hard problems under tight deadlines. Your job is to make sure the platform underneath them is not one of those problems. Working within the Platforms team, you will architect and own the tooling, infrastructure, workflows, and components that our clients developers build on. ...

121537Category: Software EngineeringLocation: United KingdomWorkplace: HybridSchedule: Full timePosted: 2026-09-28Job purpose As part of the M&S Software Engineering team, you'll be joining a well-loved historic brand, working on solutions that serves millions of loyal customers and thousands of colleagues! With ethical values that … right through the company's core and technology leaders that truly understand software engineers and engineering, it's an exciting time as we're redefining ourselves into a digital first and engineering-led organisation, with the quality of our engineering team being a key differentiator. We are seeking ...

Principal Software Engineer/Developer (C# .Net AWS Python) London/WFH to £130k Would you like to join a growing and profitable scale-up that is viewed as a leading FinTech disruptor in a senior role that will allow you a great deal of influence … progression? As a Principal Software Engineer you will architect and build highly performant and scalable solutions using the Microsoft tech stack an click apply for full job details ...

inspiring stories for people all around the world. PURPOSE OF THE ROLE This is a 12 month FTC, the role is for a Principal Software Engineer to lead development for work order fulfilment order within a major media supply chain transformation programme. The position is critical … closely with architects, developers, and product teams to drive end-to-end delivery and future-proof our technology stack. We're looking for a Principal Software Engineer with strong expertise in AWS serverless technologies, TypeScript, Python, and DevOps practices. You'll work closely with architects, product teams ...

PRINCIPAL SOFTWARE ENGINEER – V06450 Role Description Provide technical expertise across the software team for the requirements, design, implementation, testing and verification of the software subsystems on Naval radar Key Tasks Derive and maintain a set of software requirements from a baseline set of systems … requirements Produce and maintain a software design to meet a set of software requirements Use a software design to produce a deliverable software solution Test a software solution to prove that is meets its design aims and requirements Skills Have considerable ability of using ...

Principal Software Engineer, Global Public Sector Scale’s rapidly growing Global Public Sector team is focused on using AI to address critical challenges facing the public sector around the world. Our core work consists of:Creating custom AI applications that will impact millions of citizensGenerating high-quality … training data for national LLMsUpskilling and advisory services to spread the impact of AIWe are hiring a Principal Engineer to join a small team of our most senior engineers who take on the problems no one else can. You will work at the earliest stage of our engagements ...

Title: Principal Embedded Software Engineer Location: North West & Yorkshire Offices Salary: Up to £75k (depending on experience) We re partnering with an established technology engineering organisation seeking a Principal Embedded Software Engineer to lead software architecture, technical delivery, and development strategy across advanced … embedded systems. This is a senior, hands-on role combining system architecture, embedded software development, and project ownership. A key aspect of this position is applying electrical power systems knowledge and protection function theory within embedded control environments. If you re a senior embedded engineer looking to influence ...

Title: Principal Embedded Software Engineer Location: North West & Yorkshire Offices Salary: Up to £75k (depending on experience) We’re partnering with an established technology engineering organisation seeking a Principal Embedded Software Engineer to lead software architecture, technical delivery, and development strategy across advanced … embedded systems. This is a senior, hands-on role combining system architecture, embedded software development, and project ownership. A key aspect of this position is applying electrical power systems knowledge and protection function theory within embedded control environments. If you’re a senior embedded engineer looking to influence ...

inclusive employer and a member of myGwork – the largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly. Principal Security Software Engineer Description - HP Wolf Security is transforming endpoint security through hardware-enforced protection, isolation technologies, and cloud-connected security services. … solutions protect millions of users worldwide by integrating security directly into the hardware, firmware, and software of modern PCs. As part of the HP Wolf Security R&D organisation, you will help strengthen the security engineering practices that underpin our products, ensuring security is built into every stage ...

PRINCIPAL SOFTWARE ENGINEER - V06450 Role Description Provide technical expertise across the software team for the requirements, design, implementation, testing and verification of the software subsystems on Naval radar Key Tasks Derive and maintain a set of software requirements from a baseline set of systems … requirements Produce and maintain a software design to meet a set of software requirements click apply for full job details ...

Principal Process Automation Software Engineer Peterborough | Full time | £58,500 + overtime Hybrid Working A leading process automation business is entering an exciting period of growth and is strengthening its senior engineering team. This senior position sits at the heart of that growth. If you’ve spent … about it. My client delivers the full lifecycle, from quick upgrades to complete turnkey solutions: assessment, design, build, installation, commissioning, training and support. As Principal Engineer, you will be the technical authority across all of it. Why this role, and why now Join during the growth. You will ...

Principal Embedded Software Engineer | £70-85k + Bonus | Cambridge This is an opportunity to join a market-leading communications technology company developing mission-critical comms systems. You will take technical ownership of embedded application software development across Linux and Android platforms, helping deliver the next … generation of technology that underpins secure communications. Responsibilities: Designing, developing and testing embedded application software across Embedded Linux and Android platforms. Leading software component activities including architecture, task planning, technical reviews and integration testing. Developing new application features whilst maintaining and enhancing existing software components. Translating complex ...

ABOUT THE ROLE 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 … working closely with senior stakeholders, mentoring engineers across multiple teams, and line managing a small group of engineers while helping shape our approach to software delivery, architecture, and engineering culture. DIMENSIONS Budget : Awareness and influence on large-scale project budgets. Headcount : Lead multiple teams or larger cross-functional teams ...

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 continued development of their software platforms and engineering teams. This is an opportunity for an experienced Java Engineer who enjoys technical leadership but doesn't want to move ...

Join AALTO in Farnborough as Principal Software Engineer, developing safety-critical embedded software that powers Zephyr and unlocks the potential of Stratospace. AALTO, a global leader in Stratospace. Based in Farnborough, AALTO is an Airbus subsidiary that manufactures, operates, and delivers services with its solar-powered … part of a highly-skilled, innovative and passionate group of people Team AALTO. Together, we can Unlock Stratospace. Design, develop, test and maintain embedded software for airborne systems, primarily using C, with C++ and Python where appropriate. Contribute across requirements, architecture, detailed design, implementation, integration, verification and certification support. ...

DescriptionAs a Principal Software Engineer within the eCommerce Platform Delivery team, you will provide leadership and technical stewardship across multiple squads within a defined Mission. You will be responsible for the overall design and accountable for upholding engineering standards, ensuring the delivery of robust, secure, scalable … systems. Your role will involve guiding teams towards technical excellence, fostering a culture of continuous improvement, and driving high performance across all aspects of software development. Working closely with Product Managers, Agile Delivery Managers, Enterprise Architects, and the Chapter Lead for Software Engineering, you will ensure engineering standards ...

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 ...

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 ...