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

Overview As a Principal Software Engineer you will provide technical leadership across the technology function, shaping architectures and engineering standards for scalable, secure enterprise applications. You’ll mentor engineers, partner...Read More>>.

Overview In this AI/ML-focused software engineering role, you will contribute to cutting-edge defence and aerospace software by applying AI/ML techniques to deployable solutions. You’ll collaborate with systems engineers on research proje...Read More>>.

Overview Founding engineer role in Pearson's Enterprise Innovation team, shaping early AI-driven innovation initiatives with internal and external partners. You lead design and delivery of advanced AI solutions, assess feasibility, and driv...Read More>>.

Overview As a senior engineering leader at Very, you shape how we build scalable, customer‑facing software and cloud platforms. You’ll influence multiple squads, champion engineering standards, and drive architectural decisions with pro...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 Software Engineer, you will lead the design and delivery of governance-by-design platforms and libraries for secure, compliant identity solutions across the enterprise. You will drive AI-enabled, scalable patterns with...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 In this role, you accelerate secure, high-quality software delivery across Leonardo’s defence and security programmes. You will help shape and evolve the enterprise DevSecOps capability to enable teams to deliver features rapidly...Read More>>.

Overview As a Principal Software Engineer in the M&S Software Engineering team, you will shape the modernization of mission-critical systems powering warehouse operations. You’ll influence technology and product strategy while collaborati...Read More>>.

Overview In this role you will lead software development for advanced flight control and actuation systems, shaping architecture and ensuring safety-critical compliance. You will mentor teams and collaborate with hardware and test engineers...Read More>>.

Overview In this Principal Software Engineer role, you will lead high-impact engineering work for Accenture’s Software & Platform Engineering team in Manchester with ad hoc UK travel. You’ll steer client delivery, balancing hands-on tec...Read More>>.

Overview As Principal Engineer, you will lead the strategy and delivery of mission-critical AI platforms within Moody's Digital Content and Innovation team. You will shepherd multi-team efforts from prototype to production, shaping scalable...Read More>>.

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Overview As a Principal Software Engineer, you will lead the design and delivery of embedded software for safety-critical systems in aerospace. You will shape architectures, drive integration and verification, and mentor engineers to ensure...Read More>>.

Overview As Principal AI Engineer you lead the embedded Innovation Squad, driving AI architecture and delivery from discovery to production. You will harden prototypes, design reusable agentic AI patterns, and guide integration with enterpr...Read More>>.

Overview In this role you will provide technical leadership for shared software components across Elekta’s product portfolio. You will guide architectural direction, ensure secure and scalable solutions, and advance engineering practices....Read More>>.

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

Job Title: Principle Engineer – Software Assurance Location: Coventry, hybrid – 3 days/week on site We offer a range of hybrid and flexible working arrangements – please speak to your recruiter about the options for this particu...Read More>>.

Job Title: Principle Engineer – Software Assurance Location: Coventry, hybrid – 3 days/week on site We offer a range of hybrid and flexible working arrangements – please speak to your recruiter about the options for this particu...Read More>>.

As we continue to accelerate the transformation of our technology and services, we are placing security and compliance at the heart of our engineering and platforms. This is an opportunity to lead at the intersection of infrastructure engineering,...Read More>>.

Your Impact at LILA We are seeking a Senior Principal or Principal Software Engineer, AI Lab Execution System to join our Scientific System of Record Team and help define and build the next-generation AI-driven scienti...Read More>>.

The Applied Innovation (of AI) Engineering team is an elite machine learning group strategically located within the Chief Data Analytics Office (CDAO) Technology group of JP Morgan Chase. AI Engineering tackle business critical priorities using in...Read More>>.

Salary: £100,000 - 100,000 per yearRequirements:We require applicants to hold active or recently active SC or DV clearance.We are looking for strong experience delivering production systems in complex envir...Read More>>.

Moog is a performance culture that empowers people to achieve great things. Our people enjoy solving interesting technical challenges in a culture where everyone trusts each other to do the right thing. For you, working with us can mean deeper...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>>.

About Nscale Nscale is the GPU cloud engineered for AI. We provide cost‑effective, high‑performance infrastructure for AI start‑ups and large enterprise customers. Nscale enables AI‑focused companies to achieve superior results...Read More>>.

Energy Trading - Principal Software Engineer London About Indicium AI Indicium AI is trusted by the world's leading enterprises to deliver AI into production at scale. We are a global AI-native consultancy with pro...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>>.

Join a leading multi-strategy investment management firm where technology plays a critical role in supporting investment, trading, risk and operational functions. The firm operates across multiple investment strategies and relies on soph...Read More>>.

Are you passionate about leading technical excellence while remaining hands-on in building high-quality software? Do you enjoy influencing teams, shaping engineering practices, and delivering reliable, secure, and observable solutions in a coll...Read More>>.

easyJet Airline Company PLC is seeking a Principal Software Engineer to lead the eCommerce Platform Delivery team. You will drive the technical vision, architecture, and delivery of high‑performance, secure systems across multiple squads....Read More>>.

Are you a current Elekta employee? Please click here to apply through our internal career site Find Jobs - Elekta. We don’t just build technology. We build hope for everyone dealing with Cancer. Elekta is shaping the standard of care, togethe...Read More>>.

Principal Software EngineerFull TimeLocation - HeybridgeAt 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 for progres...Read More>>.

Raytheon UK is hiring a Principal Software Engineer in London. You will join a cross‑functional team delivering critical software for national security, using React/NextJS, TypeScript, Python, and Java across cloud environments.Role requi...Read More>>.

Are you passionate about leading technical excellence while remaining hands-on in building high-quality software? Do you enjoy influencing teams, shaping engineering practices, and delivering reliable, secure, and observable solutions in a coll...Read More>>.

Job 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 run right throug...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>>.

Job 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 run right throug...Read More>>.

Marks & Spencer is seeking a passionate Principal Software Engineer to join the Customer Platform team, driving modernisation of mission-critical systems as we scale. You will collaborate with cross-functional teams to design, build, and maintain...Read More>>.

Cirrus Selection Limited in Bristol is seeking a Principal Software Engineer with expert RTI DDS and distributed systems experience to shape the architecture, design and evolution of mission-critical software used in advanced defence systems. This...Read More>>.

Instil is seeking experienced Principal Software Engineers to solve complex problems and guide delivery of scalable systems. You’ll design and build software using Java, Python, C#/.NET and TypeScript, and mentor engineers across teams.Ro...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>>.

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>>.

Location: Waterloo, London, England, UK | Hybrid (1 day per week in office) Who We Are At 8th Light, we bring life to the best ideas. Founded in 2006 and headquartered in Chicago, we are a technology sol...Read More>>.