Our client is a major defence and aerospace company.Date Posted:2026-08-06Country:United KingdomLocation:Gloucester, South GloucestershirePosition Role Type:Onsite...Read More>>.

Job Description\n Job Title: Principle Engineer – Software Assurance\n Location: Coventry, hybrid – 3 days/week on site\n We offer a range of hybrid and flexible working arrangemen...Read More>>.

Job DescriptionJob Title: Principle Engineer – Software Assurance\nLocation: Coventry, hybrid – 3 days/week on site\nWe offer a range of hybrid and flexible working arrangements – please speak to your recruiter abou...Read More>>.

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 In this role you will lead architecture and development of high-performance, secure communication systems. You will mentor engineers and drive best practices across the software lifecycle, collaborating with the Software Team to en...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 shape the next generation of software features for defence systems. You join a world-class team focused on delivering market-leading solutions in Integrated Sensors & Protection, driving innovation across com...Read More>>.

Overview As Principal Software Engineer in the eCommerce Platform Delivery team, you lead and shape technical strategy across multiple squads to deliver robust, secure, and scalable systems. You guide architecture and engineering standards,...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>>.

Accenture Manchester is seeking a Principal Software Engineer with strong leadership to drive backend services and cloud-native solutions across UK client projects. The role requires hands-on engineering as well as client and team leadership, with...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>>.

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>>.

This is an opportunity for a Principal Software Engineer to join an award winning Fintech as their continue their next phase of growth. They create industry changing solutions, operate in close to 50 global markets and are known as a market lea...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>>.

Principal Software Engineer, Backend - Full or Part Time Manchester You’ve probably heard of Autotrader, but do you know what we’re all about? We’re the UK’s leading automotive marketplace, a heritage brand, and a...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>>.

慨正橡扯 in the United Kingdom is seeking a Principal Software Engineer to join their team in Manchester or Gloucester. This full-time, permanent position offers a hybrid working pattern, focusing on both technical tasks and team leadership....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>>.

Raytheon UK have a full time, permanent opportunity for a Principal Software Engineer to join our team on our Manchester or Gloucester sites within a hybrid working pattern. As Principal Software Engineer, you have the opportunity...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>>.

Principal Software Engineer / Principal AI EngineerAre you excited about building intelligent systems powered by innovative AI technologies? Do you enjoy designing models that turn complex data into impactful solutions?...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 EngineerLocation: Waterloo, London, England, UK | Hybrid (1 day per week in office)Who We AreAt 8th Light, we bring life to the best ideas.Founded in 2006 and headquart...Read More>>.

Salary: Up to £140,000 + Bonus & Benefits Harrington Starr is partnering with a leading financial technology firm to hire a Principal C# Software Engineer based in London. This is a senior technical leadership role...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>>.

RoboShadow, a fast-growing UK-based cyber security startup, is seeking a hands-on Principal Software Engineer to lead delivery and technical direction.This is a true player-coach role, not pure management; you will code, review, architect,...Read More>>.

JPMorganChase is seeking a Principal Software Engineer within Infrastructure Platforms Engineering & AI Practices to lead across multiple teams. You will design and build platforms and shared services that meet access, compliance, and governance r...Read More>>.

Cytix is hiring a hands-on Technical Leader who will unblock the engineering team by resolving technical impasses, standardising practices, and owning cross-functional initiatives. You’ll prototype rapidly, ship MVPs, and turn ideas into polishe...Read More>>.

Principal Software Engineer, £650/day (Outside IR35)Opportunity for a Principal Software Engineerto work for a retail company at thebeginning of a large digital transformation on an initial 6-month contract outside IR35.You’d re...Read More>>.

Location: Luton (Hybrid: 4 days on-site, 1 day remote) Contract: 12 months IR35: Inside IR35 Security Clearance: Full UK SC required upon application Day Rate: Competitive (please enqu...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>>.

At Fred. Olsen Ltd., we empower people to make a difference. Whether shaping renewable energy’s future or delivering industry-leading logistics, our team thrives on innovation and collaboration.Established in 1963, Fred. Olsen Ltd focus...Read More>>.

Job Description Principal Software Engineer Full Time Location - Heybridge At Rolls-Royce we are proud to be a business that has truly helped to shape the modern world and are committed to always being a force f...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>>.

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>>.

Salary: £95,000 - 95,000 per yearRequirements:We require candidates to be willing and eligible to hold SC and eDV clearance.We are looking for experience in core software engineering.Experienc...Read More>>.

Salary: £100,000 - 100,000 per year Requirements Formal training or certification (e.g., BSc, CKAD, Google Associate Cloud Engineer, or AWS Certified Solutions Architect). Expert-level administration of a maj...Read More>>.

Rolls-Royce is seeking a Principal Software Engineer in Heybridge to deliver on-time software components within the Software Systems Capability function. You will decompose designs, develop tests, and ensure the software meets allocated requiremen...Read More>>.

Salary: £61,000 - 101,000 per yearRequirements:Formal training or certification on software engineering concepts, with advanced applied experienceHands-on practical experience delivering system design, applica...Read More>>.

RTX Raytheon UK is seeking a Principal Software Engineer to lead software development across multiple programmes. The role involves delivering secure, mission-critical systems on-site at Manchester, Gloucester, or London sites, in cross-functional...Read More>>.

MHR International UK Limited is seeking a Principal Software Engineer to lead complex engineering challenges that shape our products and technical direction. You will operate across the organisation—defining strategy, influencing architecture, a...Read More>>.