1 to 25 of 60 Principal Software Engineer Jobs in London

Principal Software Engineer/Developer (Java Spring Boot AWS) London/WFH to £120k Are you an experienced Java focussed Software Engineer, with technical project leadership and client facing skills? You could be progressing your career at a global technology consultancy. As a Principal Software Engineer you will lead client projects, often long term technical transformations, designing, developing and delivering a range of projects for clients, mainly within the financial services sector and with a focus on migrating legacy systems to AWS and introducing CI/CD pipelines and cloud deployments. ...

Principal Software Engineer – AI Native Role Summary We are seeking an exceptional Principal Software Engineer – AI Native to lead the design, development, and delivery of business-critical software platforms across the company. This is a hands‐on leadership role for a highly experienced … software engineer who combines deep technical expertise with an AI‐first mindset. You will be responsible for architecting scalable solutions, driving engineering excellence, and leveraging AI‐native development practices to accelerate software delivery and innovation across the business. As a Principal Engineer, you will ...

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 ...

inclusive employer and a member of myGwork – the largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly. Principal Software Engineer/Principal AI Engineer Are you excited about building intelligent systems powered by innovative AI technologies? Do you enjoy … 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 - Search Scaling - Elasticsearchat Elastic • London, United KingdomBack to jobs6d agoE## Principal Software Engineer - Search Scaling - ElasticsearchElastic00EngineeringFull-timeLondon, United Kingdom✓ Visa RelocationApply Job### Job DescriptionElastic, the Search AI Company, enables everyone to find the answers they need in real time, using … cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI.What is The Role: We're looking for a Principal Software Engineer to join the Elasticsearch - Search Scaling team. This globally-distributed team of experienced engineers focuses on delivering a robust ...

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 ...

part of the M&S Software Engineering team, you’ll be joining a well-loved historic brand, working on solutions that serve 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 … 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 Supply Chain & Logistics at M&S, where you will be a driving force behind ...

Role description Principal Software Engineer – Data Technology Platforms Location London Start : ASAP End : As of now till Dec 2026 with possible extesnions Seeking an experienced and data-focused Principal Software Engineer to join our Data Technology Platforms team. This team is responsible for building … scalability. Solution Delivery Analyze business and technical requirements and evaluate solution viability. Design, develop, test, and deploy enterprise-grade data solutions. Support the full Software Development Lifecycle (SDLC), from requirements through production support. Ensure solutions are maintainable, supportable, and aligned with enterprise standards. Optimize performance for large-scale data ...

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 ...

## Principal Software Engineer - C#Applylocations: Londontime type: Full timeposted on: Posted Todayjob requisition id: R5616The TP ICAP Group is a world leading provider of market infrastructure.Our purpose is to provide clients with access to global financial and commodities markets, improving price discovery, liquidity, and distribution of data … consists of a dedicated team that executes complex, multi-leg synthetic strategies on behalf of institutional clients.**Role Overview**ICRV are seeking an exceptional Principal Engineer to own the architecture, design and hands-on delivery of desktop platform automating and streamlining trading desk workflows. This is a high ...

Role description Principal software engineer- C#, .net, React, SQL, Azure with BFSI exp Location London Hybrid working with 3 days work from office -Mandatory Permanent/Fixed term/Contract inside IR 35 Immediate start Applicants must be legally authorized to work in the United Kingdom without … need for current or future visa sponsorship Role Overview We are seeking a talented Software Engineer to join the Solutions Team supporting a business-critical front-office application estate. The role involves working closely with business users, operations teams, and technology stakeholders to provide application support, deliver enhancements ...

Elsevier in London is seeking a Principal AI Engineer/Principal Software Engineer to lead an embedded Innovation Squad, driving from discovery to production and transforming AI prototypes into reusable patterns and starter kits. You will shape agentic AI patterns (orchestration, memory, retrieval), mentor engineers ...

Principal Software Engineer, Mobile (React Native) Nine Elms, London - Full-time (5 days a week on-site) About the company the company is London’s leading premium convenience retail platform. Founded in 2020, our vision is to disrupt the multi‐trillion dollar convenience retail market, currently dominated … development is part of the daily toolkit here, and we ship LLM‐powered features where they genuinely make the product better. The Role As Principal Mobile Engineer you own the technical direction of our consumer iOS, Android and web apps, all built on React Native. This ...

Principal Engineer Location : Waterloo, London, England, UK | Hybrid (1 day per week in office) Who You Are You’ve shown long-term repeated success on a variety of projects, typically over the course of 10+ years. You are a trusted expert and leader, often called upon to guide … infrastructure, authentication, and observability Delivered on high‐stakes consulting engagements across multiple language paradigms, stacks, ecosystems, and client industries Built high‐quality, maintainable software collaboratively, incrementally, and through an approach tailored towards the unique needs of the clients you’ve served Led the development and delivery of production‐grade ...

Senior/Principal Software Engineer Application Deadline: 31 May 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 ...

part of the M&S Software Engineering team, you’ll be joining a well-loved British brand, working on solutions that serve millions of loyal customers and thousands of colleagues. With ethical values at the heart of the business and technology leaders who understand modern software engineering, this … exciting time to join us as we become a digital-first, engineering-led organisation. We are looking for a Principal Software Engineer to provide senior technical leadership across our International Fashion, Home & Beauty domain. You will shape and modernise mission-critical platforms that support international growth, working ...

Role: MS Power platform Principal Software Engineer Location: London,UK Jon Type: Permanent (Hybrid - 4 days office Mandatory) KEY ACCOUNTABILITIES Primary technical point of contact for the applications in scope of this role Represent Software Engineering CoE in discussions and forums such as architecture and design … teams to assess environment compatibility, highlight risks, and propose mitigations. Ensure the applications are built in adherence to Intact, and established industry standards for software development Document technical learnings, configurations, and application knowledge for knowledge retention, person dependency reduction, and future transition Build proofs of concept, work on architecture ...

Marks & Spencer Plc’s Software Engineering team is seeking a Principal Software Engineer to provide senior technical leadership across our International Fashion, Home & Beauty domain and shape mission-critical platforms for international growth. You will set technical direction, drive scalable and secure solutions, mentor engineers ...

Gemba Advantage is seeking a Senior/Principal Software Engineer to design and deliver secure, scalable software solutions while working in small agile teams. The role requires active SC or DV clearance and entails championing modern engineering practices, shaping architectural direction, and influencing technical decisions. Candidates ...

Morgan Chase. AI Engineering tackle business critical priorities using innovative machine learning techniques and technologies with a focus on machine learning for Software, Cybersecurity and Technology Infrastructure. The team partners closely with all lines of business and engineering teams across the firm to execute long-term projects in these … areas that require significant machine learning development to support JPMC businesses as they grow. As a Principal Software Engineer at the company within CDAO Technology Group in the Applied Innovation (of AI) Engineering team, you will design, develop, deploy, and maintain advanced AI products. You\'ll collaborate ...

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 digital services. This is a senior hands‐on role for an individual who combines deep technical expertise … design and architecture of scalable, secure, and resilient enterprise applications, ensuring alignment with business and technology strategies. Drive Technical Leadership – Define and champion software engineering standards, architectural patterns, best practices, and reusable frameworks across the engineering community. Own Delivery Outcomes – Lead complex technology initiatives from concept through to deployment ...

Principal Software Engineer London, United Kingdom Posted 12 months ago Tech stack Java Kubernetes Spring Boot Spring Framework Requirements 8+ years experience in backend development using Java/Spring Boot or equivalent. Experience with containerization and orchestration technologies (Kubernetes). Deep understanding of ... Compensation Competitive Role ...

United States Digital Space LLC is seeking a Senior Principal Software Engineer to drive the development and enhancement of trusted technology products. This role requires proven software engineering experience, expertise in programming languages including Java and Python, and the ability to lead multi-organization adoption ...

helps you realize your potential. Our team is key to our success. We’re people-first. We value collaboration, curiosity and commitment. As a Principal Software Engineer at JPMorgan Chase within the Accelerator Business in the Platform Team, you are the heart of this venture, focused … term architectural strategy for platform engineering, ensuring competitive advantage and scalability. Mentor and coach senior engineers across teams, elevating the technical bar and championing Software Engineering Communities of Practice. Serve as the key technical liaison for product, business, and security stakeholders, translating technical decisions into business impact. Lead ...

helps you realize your potential. Our team is key to our success. We're people-first. We value collaboration, curiosity and commitment. As a Principal Software Engineer at JPMorgan Chase within the Accelerator Business in the Platform Team, you are the heart of this venture, focused … term architectural strategy for platform engineering, ensuring competitive advantage and scalability. Mentor and coach senior engineers across teams, elevating the technical bar and championing Software Engineering Communities of Practice. Serve as the key technical liaison for product, business, and security stakeholders, translating technical decisions into business impact. Lead ...