1 to 25 of 63 Principal Software Engineer Jobs in London

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 ...

Principal Software Engineer/Principal AI Engineer Are you excited about building intelligent systems powered by innovative AI technologies? Do you enjoy creating solutions that turn complex data into impactful outcomes? About the team Embedded Innovation Teams are cross-functional squads embedded within our segments … inside segment and function teams, improving the internal workflows that help our people deliver better outcomes for customers, faster. About the role As a Principal AI Engineer/Principal Software Engineer, you will be the technical lead for an embedded Innovation Squad, owning technical execution ...

Principal Software Engineer/Principal AI Engineer Are you excited about building intelligent systems powered by innovative AI technologies? Do you enjoy creating solutions that turn complex data into impactful outcomes? About the team: Embedded Innovation Teams are cross-functional squads embedded within our segments … inside segment and function teams, improving the internal workflows that help our people deliver better outcomes for customers, faster. About the role: As a Principal AI Engineer/Principal Software Engineer, you will be the technical lead for an embedded Innovation Squad, owning technical execution ...

## Principal Software EngineerAnsøg: London The Point - Cross Border: Full time: Slået op i dag: R09353# # **Your role**# # **What you'll be doing**## **Principal Software Engineer** ## **What We Need** Corpay is currently looking to hire a Principal Software Engineer within our Alpha division. This position falls under our Corporate Payments line of business and is located in London, United Kingdom.You will operate as a senior individual contributor and trusted technical leader, reporting directly to the Director of Engineering for Client Lifecycle. This is not a people ...

Selection changes the language of the page/content Principal Software Engineer - Marketing Technology London, England, United Kingdom Software and Services Imagine what you could do here. At Apple, new ideas have a way of becoming extraordinary products, services, and customer experiences very quickly. You bring … passion and dedication to your job and there's no telling what you could accomplish.Apple is in search of an experienced Principal Software Engineer to join the Central Marketing's Marketing Enablement team in London to drive technical architecture vision for its marketing products. This ...

Principal Software Engineer Department: Technology Employment Type: Permanent - Full Time Location: London Reporting To: Head of Engineering Description Defaqto is one of the most trusted names in UK financial services research and ratings, and our technology turns deep market data into decisions that advisers, providers and consumers … rely on every day. The credibility of that output rests on the quality of our engineering. We are looking for a Principal Software Engineer to be the most senior individual contributor in our Technology function. Reporting to the Head of Engineering and working closely with ...

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 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 ...

Principal Software Engineer - Simple Machines Hybrid · Full-time · London, UK About Simple Machines Simple Machines is a leading independent boutique technology firm with a global footprint across London, Poland, Sydney and New Zealand. We operate at the intersection of data, AI, machine learning, data engineering, and software … help them better understand their organisations, customers, and citizens. Our teams design and build large-scale data platforms, intelligent systems, and high-impact software products. We engineer data to lifeTM. The Role As a Principal Software Engineer , you’ll play a key role in delivering ...

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 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 a passionate Principal Software Engineer to join us working across ...

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 proven experience across Financial Services, Energy & Utilities, Healthcare & Life Sciences, Retail … partners - including Anthropic, Databricks, AWS, OpenAI, and Microsoft - to deliver modern AI with speed and measurable impact. Overview Indicium 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 ...

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 ...

have within the community. Salary: £80,200 - £120,400 The Opportunity This is more than just a job; it’s a mission. As a Principal Software Engineer, you will play a pivotal role in designing, developing, and maintaining the critical infrastructure that powers our services. You will … meet customer needs. “My purpose is to lead a team of engineers, rise to the challenges presented, push the boundaries and define possible together.” – Principal Software Manager, Northrop Grumman UK What You’ll Do Take ownership of multiple teams’ deliverables and work with technical leads to define ...

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 ...

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 ...

Title: Principal Software Engineer, AI Innovation Career Architecture Role: Software Engineer Career Architecture Tier: E35 (Principal, Expert Track) Job Summary: This is a founding engineer role in a new, innovation-focused team being built from scratch within Pearson's Enterprise Innovation function. … stage environments. Learning to Learn, Adaptability, Ethical Responsibility (Effective–Advanced): Embrace new technologies and maintain high ethical standards. Qualifications (Education & Experience): Extensive experience in software engineering and AI innovation, with a broad full-stack skillset. Proven track record of working on early-stage or 01 products, shaping direction rather ...

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 ...

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 citizens Generating high … quality training data for national LLMs Upskilling and advisory services to spread the impact of AI We 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 ...

Compliance (formerly DRS) audits every worked hour against working-time legislation and NHSE standards so that payroll is exact. About the Role As our Principal Engineer, you will lead all core software engineering work across the entire Lantum platform and service architecture to scale Lantum’s next … covers back-end, front-end, architecture, infrastructure, DataOps, AI SDLC, and security realms and disciplines. Responsibilities you own core, end-to-end software engineering processes and infrastructure; you ensure that our existing core revenue-generating systems run without interruption under strict SLAs while optimising them, expanding their capabilities ...

Senior/Principal Software Engineer Application Deadline: 30 October 2026 Department: Software Engineering Employment Type: Permanent Location: London (Hybrid) Compensation: £70,000 - £100,000/year Description Please note: This role requires applicants to hold active, or recently active, SC or DV clearance. This role also … kind that have to be secure, scalable, and actually usable by the people who rely on them. We’re looking for Senior and Principal Engineers who want to shape meaningful systems, influence technical direction, and work alongside capable people who care about doing the job properly. You’ll help ...

skilled, innovative and passionate group of people – Team AALTO. Together, we can Unlock Stratospace. About The RoleWe're looking for an experienced, hands-on Principal Software Engineer to take a senior technical role within a multidisciplinary team developing safety-critical aircraft software. This is an opportunity … work close to the product, influence engineering decisions and help shape robust airborne software that will operate in demanding real-world environments. You'll design, develop, verify and maintain embedded software primarily in C, with C++ and Python also part of the engineering toolkit. Working across the full ...

Raytheon UK is seeking a Principal Software Engineer to join our established software development function in London. You will work in a cross-functional team, delivering and deploying critical software across multiple business areas. The role requires hands-on experience with React/NextJS, TypeScript ...

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 ...

Principal Software Engineer (Infrastructure), London London Isomorphic Labs is applying frontier AI to help unlock deeper scientific insights, faster breakthroughs, and life-changing medicines with an ambition to solve all disease. The future is coming. A future enabled and enriched by the incredible power of machine learning. … foundations driving that transformation. You'll be working as part of a small and highly efficient team on all parts of cloud infrastructure and software lifecycle. Reporting directly into our Director of Engineering to help manage and create stability to all cloud and infrastructure tasks around the Training ...

Principal Software Engineer (ML Infrastructure), London London Isomorphic Labs is applying frontier AI to help unlock deeper scientific insights, faster breakthroughs, and life-changing medicines with an ambition to solve all disease. The future is coming. A future enabled and enriched by the incredible power of machine … solve all disease with the help of AI. Your impact This is an exciting opportunity for a small number of innovative and versatile software engineers to work in a fast-paced and research-centric environment. You will collaborate extensively with internal engineering and research teams to evolve the foundational ...