226 to 250 of 372 Principal Engineer Jobs

About The Role Deadline for applications: 11:59pm on 31st October 2025 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 engineering happens … project risks, helping teams navigate complex technical challenges. About You Professional knowledge and experience Essential Extensive experience in software engineering, with a focus on large-scale, complex systems. Polyglot engineer comfortable working across multiple languages and frameworks (weve used Python, Java, Kotlin, Node.js, C#, JavaScript, Express, React and Next.js to name a few). Passion for learning new technologies More ❯

Overview The Principal Software Engineer will be a member of the Spacelabs R&D engineering team working on and leading the development of Spacelabs Patient Monitoring and Connectivity (PMC) products. This position requires a deep understanding of solid design and development practices and the ability to apply those to Spacelabs product development. The person will be responsible for … performance and cybersecurity needs of our customers. A strong systems approach to product development will be necessary in this role. You will spend your time as a hands-on engineer and a technical leader. Our team plays a key role in building software products and features. You will use a wide range of technologies, programming languages and systems. You More ❯

as the Lower Thames Crossing and the A9 - Tomatin to Moy. We are reinforcing our excellent technical teams in response to these commitments. We are seeking a Senior or Principal Civil Engineer with a focus on drainage design to strengthen our technical teams and lead a team of drainage engineers based in the UK. This is a fantastic … and proposals as well as work to Mott MacDonald's global standards and review Health, Safety and Welfare alongside environmental impact. Candidate specification We are seeking a Senior or Principal Civil Engineer with a focus on drainage design to strengthen our technical teams and lead a team of drainage engineers based in the UK. We are looking for More ❯

Principal Backend Developer Manchester 65K75K Join a fast-growing SaaS business backed by a global group and help shape a brand-new engineering team. This role is office-based in a vibrant exciting new office! Youll set the technical direction, build scalable backend systems, and deliver products that impact millions of users. Tech Stack : C#/.NET 6+, TDD More ❯

Principal Backend Developer – Manchester £65K–£75K Join a fast-growing SaaS business backed by a global group and help shape a brand-new engineering team. This role is office-based in a vibrant exciting new office! You’ll set the technical direction, build scalable backend systems, and deliver products that impact millions of users. Tech Stack : C#/.NET More ❯

Principal Backend Developer – Manchester £65K–£75K Join a fast-growing SaaS business backed by a global group and help shape a brand-new engineering team. This role is office-based in a vibrant exciting new office! You’ll set the technical direction, build scalable backend systems, and deliver products that impact millions of users. Tech Stack : C#/.NET More ❯

Principal Platform Engineer | Fintech | London | Up to 200k + Equity | London (Min 4 days per week in office) Maze is partnering with a stealth-mode startup that's rebuilding core banking from the ground up. Theyre creating the worlds first open-source, AI-native Thin Ledgerset to replace legacy infrastructure at Tier 1 banks. We're looking for … a Principal Platform Engineer to drive the infrastructure behind mission-critical systems: think active-active, five-nines uptime, and real-time observability at global scale. What You'll Do: Own platform architecture for our next-gen ledger infrastructure Scale multi-region Kubernetes environments across cloud & on-prem Harden distributed systems (Kafka, Redis, CockroachDB) for global banking workloads Lead More ❯

Principal Full Stack Engineer - React Native, Next.js & AWS (250628) Ensure you read the information regarding this opportunity thoroughly before making an application. Who we are: Founded in 1995, Consumer Cellular is the first wireless provider unapologetically built for Americans 50+. An approved wireless partner of AARP, Consumer Cellular differentiates itself from the competition with its affordable plans and … unmatched customers service. Message from the Hiring Manager As a Principal Software Engineer on the Customer-Facing Digital Experience team, you will be expected to seamlessly integrate into the team with minimal guidance, demonstrating the ability to hit the ground running from day one. You will lead a team of highly skilled engineers, mentoring and growing the skills More ❯

Principal Software Engineer | High-growth, Purpose-Led and A* funded Fintech | Hybrid – London **Python, TypeScript, React** A leading fintech scale-up is hiring a Senior Software Engineer to join its high-performing engineering organisation in London. This is an opportunity to contribute to a platform designed to improve finance globally — with real impact at scale. The company … first platform. Backed by leading venture capital and impact investors, the organisation is entering a new phase of growth, with engineering at the core. The Opportunity As a Senior Engineer, you will play a key role in designing and delivering scalable, reliable systems that handle significant volumes of real-time data and transactions. You'll collaborate with product, data … and platform teams to deliver high-impact features that directly improve user financial wellbeing. This is a hands-on role for an engineer who values clean architecture, measurable outcomes, and meaningful user impact. What You’ll Do: Design and implement distributed systems that are resilient, scalable, and secure. Own technical decision-making across architecture and implementation — selecting the right More ❯

Principal Software Engineer | High-growth, Purpose-Led and A* funded Fintech | Hybrid – London **Python, TypeScript, React** A leading fintech scale-up is hiring a Senior Software Engineer to join its high-performing engineering organisation in London. This is an opportunity to contribute to a platform designed to improve finance globally — with real impact at scale. The company … first platform. Backed by leading venture capital and impact investors, the organisation is entering a new phase of growth, with engineering at the core. The Opportunity As a Senior Engineer, you will play a key role in designing and delivering scalable, reliable systems that handle significant volumes of real-time data and transactions. You'll collaborate with product, data … and platform teams to deliver high-impact features that directly improve user financial wellbeing. This is a hands-on role for an engineer who values clean architecture, measurable outcomes, and meaningful user impact. What You’ll Do: Design and implement distributed systems that are resilient, scalable, and secure. Own technical decision-making across architecture and implementation — selecting the right More ❯

Principal Software Engineer | High-growth, Purpose-Led and A* funded Fintech | Hybrid – London **Python, TypeScript, React** A leading fintech scale-up is hiring a Senior Software Engineer to join its high-performing engineering organisation in London. This is an opportunity to contribute to a platform designed to improve finance globally — with real impact at scale. The company … first platform. Backed by leading venture capital and impact investors, the organisation is entering a new phase of growth, with engineering at the core. The Opportunity As a Senior Engineer, you will play a key role in designing and delivering scalable, reliable systems that handle significant volumes of real-time data and transactions. You'll collaborate with product, data … and platform teams to deliver high-impact features that directly improve user financial wellbeing. This is a hands-on role for an engineer who values clean architecture, measurable outcomes, and meaningful user impact. What You’ll Do: Design and implement distributed systems that are resilient, scalable, and secure. Own technical decision-making across architecture and implementation — selecting the right More ❯

Principal Software Engineer | High-growth, Purpose-Led and A* funded Fintech | Hybrid – London **Python, TypeScript, React** A leading fintech scale-up is hiring a Senior Software Engineer to join its high-performing engineering organisation in London. This is an opportunity to contribute to a platform designed to improve finance globally — with real impact at scale. The company … first platform. Backed by leading venture capital and impact investors, the organisation is entering a new phase of growth, with engineering at the core. The Opportunity As a Senior Engineer, you will play a key role in designing and delivering scalable, reliable systems that handle significant volumes of real-time data and transactions. You'll collaborate with product, data … and platform teams to deliver high-impact features that directly improve user financial wellbeing. This is a hands-on role for an engineer who values clean architecture, measurable outcomes, and meaningful user impact. What You’ll Do: Design and implement distributed systems that are resilient, scalable, and secure. Own technical decision-making across architecture and implementation — selecting the right More ❯

About the role: This is an exciting opportunity for a forward-thinking and innovative cloud engineering lead to join ROCK. The Principal Cloud & AI Engineer is a highly technical, hands-on role that provides both deep engineering expertise and architectural guidance as we embark on scaling our AWS and Azure services portfolio. The role requires leadership qualities to … tooling, CI/CD pipelines operational processes, automation, and security practices to ensure ROCK’s cloud deployments are robust, efficient, and financially well-managed. Alongside daily engineering responsibilities, the Principal Cloud Engineer will shape technical best practices, drive continuous improvement, and mentor engineers, fostering a culture focused on growth, learning, and innovation that supports ROCK’s ambition to … and improvement. What we need: Proven experience in implementing and designing cloud solutions in AWS (currently holds or is willing to pass AWS Certified Solutions Architect Professional or DevOps Engineer Professional). Must have experience in Windows migration to AWS, Workspaces and monitoring and security services. Extensive experience with landing zone development using Terraform IaC, CI/CD and More ❯

Overview Mesh-AI are seeking an exceptional Principal Software Engineer to lead delivery of exciting engagements within our Energy & Commodities Trading sector. This role demands a unique combination of hands-on technical excellence and deep domain expertise in trading environments. You will architect and implement critical solutions that power real-time trading decisions, while mentoring teams and driving More ❯

Westlakes Recruit are currently recruiting for a Principal Systems Engineer to be engaged on a permanent basis, based in Bristol, London, Reading, Silchester and Manchester. Your Purpose: Provide consultancy to client project and engineering managers. Lead the use of best practice techniques and tools on client and internal projects. Champion a Model Based Systems Engineering (MBSE) approach to More ❯

sustain optimized product lines across the sector while providing a decisive advantage to the warfighter. Come be a part of our mission. We have an opening for either a Principal Full-Stack (Front-End Focused) Software Engineer or Senior Principal Full-Stack (Front-End Focused) Software Engineer to join our Redondo Beach, CA, Software and Controls … professional development and training, as well as engagement and inclusion activities such as lunch-n-learns, campus events, and leadership mixers. As a Full-Stack (Front-End Focused) Software Engineer, you'll be joining an existing on-contract classified portfolio called Swordfish supporting a critical national security mission that is both in Operations and major development. The program team … or help the team be more productive or produce a higher quality product. This requisition may be filled at a higher grade based on qualifications listed below. Basic Qualifications: Principal Full-Stack (Front-End Focused) Software Engineer: Bachelor's degree with 5 years of relevant experience; Master's degree with 3 years of relevant experience; PhD with More ❯

is a beautiful, surprising and vibrant place to work. We might not be for everyone, but we could be perfect for you. About the job We're looking for Principal Full Stack Engineers to join us Our technology teams combine a diverse set of technologies to meet the needs of our users, handling millions of requests a day across … and knowledge sharing are at the core of what we do. Regular pair programming, code reviews, and stand-ups ensure that our engineers stay connected and aligned. As a Principal Engineer, you'll play a visible, strategic role in driving system design and architecture decisions, mentoring team members, and helping our teams deliver high-quality solutions at scale. More ❯

an environment for every teammate that’s welcoming, respectful and inclusive, with great opportunity for professional growth. Find your future with us. The Boeing Company is currently seeking a Principal Software Engineer–Systems to support our Advanced Design and Prototype Solutions (ADaPS) team located in Huntsville, Alabama. This position will focus on supporting the Boeing Defense Services (BDS … in SW test, automated deployment, introduction of robotics, and the possible use of AI concepts. These responsibilities will be performed on site. Position Responsibilities: The IAMD Programs SW Lead Engineer will be responsible for creating and leading implementation of architecture roadmaps for the factory and electronics (embedded) software products and represent the SW team as part of the Chief … Engineer’s leadership team. Directs software system-level analyses to identify risk, issues and opportunities; consults on integration and deployment of mitigation actions throughout the software lifecycle. Also, directs monitoring and reviewing test completion, verification processes and issue resolution for software systems. Coordinate and provide direction to technical software leaders from each program who are themselves senior engineers. This More ❯

be part of the clean energy movement, creating a lasting impact on the world. All while being part of a passionate, fun, and highly collaborative team. The Role: The Principal Software Engineer (Full Stack) role is a full-time permanent position located in the United Kingdom and is a remote working role. You will have the opportunity to … a Lasting Impact: Be part of the clean energy movement and contribute to a sustainable future, making a meaningful impact on a global scale. If you are a talented principal software developer possessing all of the requisite skills, seeking an opportunity to join our fast-paced start-up, please apply. More ❯

Are you an experienced Principal Embedded Software Engineer seeking a new challenge in Cambridge? This role offers the chance to elevate your career while working on cutting-edge projects in a dynamic and innovative environment. As a Principal Embedded Software Engineer, you will be at the forefront of technological advancements, directly contributing to the development and More ❯

Are you an experienced Principal Embedded Software Engineer seeking a new challenge in Cambridge? This role offers the chance to elevate your career while working on cutting-edge projects in a dynamic and innovative environment. As a Principal Embedded Software Engineer, you will be at the forefront of technological advancements, directly contributing to the development and More ❯

Are you an experienced Principal Embedded Software Engineer seeking a new challenge in Cambridge? This role offers the chance to elevate your career while working on cutting-edge projects in a dynamic and innovative environment. As a Principal Embedded Software Engineer, you will be at the forefront of technological advancements, directly contributing to the development and More ❯

Principal Consultant Integrity Engineer (Pressure Systems) PSSR Conventional Power and Clean Energy Industries Job type: Full time Location:Risktec Derby Job type: Full time Location: RisktecDerby (UK) Salary & Benefits: Competitive Salary, Profit Share, Private medical insurance (BUPA) & Permanent Health insurance, (income protection scheme), Life assurance, Pension (7.5 % company contribution) see below for more detail. Expected duration: Permanent Risktec … at TUV Rheinland UK is seeking Principal Integrity Engineers (permanent role) with specific pressure systems knowledge to take up senior positions in its expanding Asset Integrity Management team based in Derby, UK. The successful candidates will play a key role in leading and delivering solutions for our clients. The majority of the teams activities are focussed on the Conventional … visits, both within the UK and abroad, to meet project requirements. Required qualifications and experience : BEng/MEng degree or equivalent in engineering related topic preferably mechanical engineering. Chartered Engineer or working towards professional registration is desirable. Minimum of 10 years of relevant experience. Rewards: A competitive package of salary and benefits is offered for permanent staff this includes More ❯

Job Title: Product Engineer Location: Remote Salary: £72,000 – £110,000 + stock options I’m working with a fast-growing SaaS scale-up software organisation. They’re looking for a Principal Product Engineer who thrives in a collaborative, product-focused environment. You’ll be part of a cross-functional squad (PM, designer, engineers, data) and involved More ❯

Our client, a leader in the defence and security sector, is seeking a Principal Software Engineer to join their team in Berkshire. This is a permanent role where you will provide technical leadership within their Cyber Unit. Key Responsibilities: Architect, specify requirements, design, implement, and test embedded and/or application software to ensure high quality and timely More ❯