Overview In this leadership role, you blend hands-on coding with strategic software leadership to guide a product squad and set high‑level architecture. You will drive best practices, manage technical debt, and align delivery with other P...Read More>>.

Overview As a Principal Software Engineer in Public Markets Technology, you will help build an AI-enabled investment platform by delivering scalable Python solutions on a cloud-first stack. You’ll collaborate with portfolio managers, data...Read More>>.

Overview In this role you will help evolve ThousandEyes’ technologies within Cisco’s broader portfolio, shipping new features that improve digital experience across networks. You will collaborate with product and engineering leaders to...Read More>>.

Overview In this role you own and shape the technical strategy for a software vertical, aligning with cross‑functional teams to influence enterprise-wide architecture and practices. You lead high-impact technical work, mentor engineers, a...Read More>>.

Overview As Principal Engineer, you will shape the architecture and direction of our API platform, guiding scalable cloud-native systems and event-driven services. You will work with cross-functional squads to solve distributed systems chal...Read More>>.

Overview As a Principal Software Engineer in Mastercard’s Operations Automation Program, you lead automation and infrastructure management across on-premise and cloud environments. You’ll shape scalable DevOps across global engineering...Read More>>.

Overview In this role you will own the end-to-end software lifecycle for secure, mission-critical products in a defence environment. You’ll lead embedded and/or application software development, shaping architecture with cross-functional...Read More>>.

Overview As a Principal Software Engineer, you will lead the development of safety-critical airborne software in a multidisciplinary team. You will influence engineering decisions and shape robust embedded solutions for Zephyr-based stratos...Read More>>.

Overview As Principal Software Engineer, you will provide technical leadership for a new Electron- and Chromium-based desktop platform enabling Autodesk web apps. You will define platform architecture, lead core engineering across Electron,...Read More>>.

Overview In this role you lead technical direction for Vitality’s Engineering function, shaping standards and architecture across enterprise platforms and customer-facing solutions. You work across multiple teams with senior stakeholders...Read More>>.

Overview As Principal Software Engineer, you will architect and build cloud-native solutions across Mobile, Web, and Tooling to advance medical insights and predictive models. You may lead a small team from day one or focus on hands-on deli...Read More>>.

19 hours ago Be among the first 25 applicantsDirect message the job poster from Clearwater AnalyticsLead Recruiter at Clearwater Analytics - Hiring in UK, France, Germany, LuxembourgJob Summary:The Tr...Read More>>.

OverviewiO Associates is supporting a large public-sector organisation. They are looking for a Principal Software Engineer to help shape the future of digital services. You'll join a forward-thinking Head of Engineering who is transfor...Read More>>.

OverviewThis role requires applicants to hold active, or recently active, SC or DV clearance, and to be willing to work on-site up to 4 days per week. At Gemba Advantage, we build secure, user-centred digital products for critical publ...Read More>>.

Hybrid in London (2 days on-site, 3 days from home)Up to £130k base + Bonus +StockPrincipal Software Engineer – Would you like to be part of a brand-new engineering group focused on redefining how people move through next gener...Read More>>.

Your Impact As a Principal Software Engineer (DevSecOps), you will play a key role in accelerating the delivery of secure, high-quality software across Leonardo's defence and security programmes. You will help shape and evolve our ente...Read More>>.

Meet the TeamCisco ThousandEyes is a Digital Experience Assurance platform that empowers organizations to deliver flawless digital experiences across every network - even the ones they don't own. Powered by AI and an unmatc...Read More>>.

Role Purpose We are seeking a highly experienced Principal Software Engineer to provide technical leadership across our technology function, driving the design, delivery, and continuous improvement of enterprise applications and digita...Read More>>.

Meet the Team Cisco ThousandEyes is a Digital Experience Assurance platform that empowers organizations to deliver flawless digital experiences across every network - even the ones they don’t own. Powered by AI and an unmatched set o...Read More>>.

Why Technology at loveholidays? At loveholidays - we trailblaze together. We’re on a mission to open the world to everyone, giving our customers’ unlimited choice, unmatched ease and unmissable value for their next getaway....Read More>>.

OverviewI'm working with a software company that's looking for a Principal Software Engineer to join their team. They have developed a product that utilises data analytics and machine learning to optimise inventory data,...Read More>>.

£80,000 - £100,000 + bonus and sharesThe OpportunityWe are VERY excited about this opportunity. We’ve been working with this client for years and every candidate we have ever placed with them have loved it there. Contractors...Read More>>.

Gemba Advantage is seeking Senior and Principal Software Engineers to design and deliver secure, scalable cloud-native services in small teams. You will remain hands-on while guiding architecture and standards, mentoring peers, and collaborating w...Read More>>.

About Us Huguenots generates highly personalised solutions for fund management clients of all sizes, from start‑up boutiques to global asset management firms, using our in‑house investment reporting platform. All clients are assure...Read More>>.

We're hiring for one of the UK's fastest growing fintech scaleups, where reliability is a competitive advantage not a luxury. As a Principal Software Engineer you will be providing deep technical leadership alongside being extremely hands on as...Read More>>.

Principal Engineer (Java) | London (Hybrid) | FinTechFinancial services experience is essential for this one.We're working with a B2B FinTech disrupting the SME lending market. Their SaaS platform is used by over 80 high street ba...Read More>>.

About Fastmarkets Fastmarkets is an industry‑leading price‑reporting agency (PRA) and information provider for global commodities, offering price data, news, analytics and events for agriculture, forest products, metals and mining,...Read More>>.

About WeBuild-AI: WeBuild-AI areAInatives delivering 10x value for enterprise organisations. We combine highly skilled experts with ourAI Launchpad, industry-aligned language models, and agents to tra...Read More>>.

Bring more to life. At IDBS, one of Danaher’s 15+ operating companies, our work saves lives—and we’re all united by a shared commitment to innovate for tangible impact. IDBS helps BioPharma organizations unlock the po...Read More>>.

Principal Software Engineer Department: Technology Employment Type: Permanent - Full Time Location: London Reporting To: Head of Engineering Description Defaqto is one of...Read More>>.

Job Description - Principal Software Engineer (17065) Job Description Principal Software Engineer ( 17065 ) Description As a Principal Software Engineer within the eCommerce Platform Delivery team, you will provide l...Read More>>.

Job Description: Your impact Would you like a once-in-a-generation opportunity to play a key role in a defence programme of national and international importance? We are on the hunt for talented software engineers to su...Read More>>.

About usAt Raytheon UK, we take immense pride in being a leader in defence and aerospace technology. As an employer, we are dedicated to fuelling innovation, nurturing talent, and fostering a culture of excellence. As a leading defence...Read More>>.

Principal Software Engineer Location: London Permanent Onsite Due to the interesting work we do and the sector this team is working in, we require all candidates to hold an active eDV cleara...Read More>>.

OnsiteDate Posted2026-09-24CountryUnited KingdomLocationLondon, London, City ofPosition Role TypeOnsitePrincipal Software Engineer...Read More>>.

Reading - Hybrid (ideally 2/3 days per week)Albany Growth are partnered with an established software business going through a major multi-year technology transformation, rebuilding and modernising a large legacy product estate onto a new...Read More>>.

We are The Citation Group - a collective of businesses dedicated to supporting small and medium-sized enterprises across a range of essential services. We know that running a business means juggling a lot. Our mission is to ease these pressures by...Read More>>.

Inside IR35Hybrid - LondonRole Overview:We are seeking an exceptional Senior / Principal Java Developer with extensive front-to-back trading systems expertise to join our delivery team on a high-profile eng...Read More>>.

Bring more to life. At IDBS, one of Danaher’s 15+ operating companies, our work saves lives—and we’re all united by a shared commitment to innovate for tangible impact. IDBS helps BioPharma organizations unlock the potential of AI/ML to impr...Read More>>.

Principal Software Engineer Based in Bristol Salary up to 70,000 + Bonus + Excellent Benefits Want to work on complex software that sits at the heart of advanced defence systems? We're looking for an experienced Softw...Read More>>.

Job Description: Job DescriptionAre you a Real Time Embedded Software Engineer ready to take the next step on your career journey. If you are looking at opportunities for progression, to learn and grow within a supportive enviro...Read More>>.

Job DescriptionThe Opportunity Are you a Software Engineer with C++ experience looking for your next challenge? Here at Leonardo, we are seeking an experienced Principal Software Engineer to take on pivotal technical work within our In...Read More>>.

At MHR, our employees are central to our success and play a key role in helping customers achieve sustainable high performance. With a team of over 900 professionals, we work to make things flow smoothly, whether it's for large organisations or in...Read More>>.

Roche in the United Kingdom is seeking a Principal/Senior Principal Software Engineer within the Computational Sciences Center of Excellence. You will design and build scalable, data-centric platforms that accelerate drug discovery, collaborating...Read More>>.

Pathfinder in London is seeking a Principal Software Engineer to lead the design and delivery of complex digital services. You will write production code, guide a small engineering team, and shape architectural decisions in collaboration with prod...Read More>>.

Roche Holding AG in the UK is seeking a Software Engineer (Principal / Senior Principal) to design and evolve modern computational and data ecosystems that accelerate drug discovery. You will build scalable, cloud-native platforms and interactive...Read More>>.

Our MissionAt Palo Alto Networks we’re united by a shared mission—to protect our digital way of life. We thrive at the intersection of innovation and impact, solving real-world problems with cutting-edge technology and bold thinking....Read More>>.

Company DescriptionWork with Us. Change the World.At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, o...Read More>>.