1 to 25 of 72 Principal Software Engineer Jobs in London

Principal Software Engineer/Developer (Java Spring Boot AWS) London/WFH to 120kAre 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.You'll join ...

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 EngineerAre 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 to rapidly … directly 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/Principal AI Engineer Embedded Innovation Teams are cross‐functional squads embedded within our segments to rapidly turn internal AI experimentation into validated, reusable solutions, building the capabilities we need to deliver customer value and growth. We work problem‐first rather than … 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, you will be the technical lead for an embedded Innovation Squad, owning technical execution from discovery through to production. You will ...

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 ...

experienced Principal Software Engineer looking to work on cutting-edge technology and make a meaningful impact on users' daily lives in the medical field? If so, we invite you to apply below.As the Principal Software Engineer, you'll bring a wealth of cloud-native … technical development and delivery of products in line with our product vision and Quality Management System. Additionally, you'll shape the technology roadmap, enhance software delivery capabilities, and influence the company's overall technology strategy.To excel in this position, you should have a proven track record of successfully taking ...

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 ...

impact we have within the community.Salary: 80,200 - 120,400The OpportunityThis 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 work … 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 UKWhat You’ll DoTake ownership of multiple teams’ deliverables and work with technical leads to define a path that ...

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 Salary to £80k, poss. higher for their ‘Unicorn’ candidate Role can be based remotely, as long as you can occasionally travel to London for client work (travel expenses paid) - approx. once a month. NB: Please only apply if you are a UK National, have … Proof of ID will be required prior to interview. This role is with a growing is a technology consultancy. This is a hands-on principal engineering role: architecture ownership across multiple services, technical leadership across teams, and direct contribution to engineering standards and hiring. Their successful candidate will ...

Location: United Kingdom, London, LondonEmployment type: Full-TimeWork site: 0 days/week in-office – remoteRole type: Individual ContributorTravel: Less than 25%Profession: Software EngineeringDiscipline: Software EngineeringCompany: MicrosoftOverviewIn the Microsoft Frontier Company Engineering team, you won’t just build software; you’ll deliver real outcomes for some … embedding directly within customer teams to solve their toughest challenges, side-by-side, and shipping production-ready solutions in days, not months. As a Principal Software Engineer, you will bring strong software design and engineering expertise, building reliable systems and production-ready services that turn ideas ...

Title: Principal Software Engineer, AI InnovationCareer Architecture Role: Software EngineerCareer 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. The mission … moving, early-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 than ...

Principal Engineer 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 solutions consultancy that partners with organisations from early-stage startups … world's largest companies. We take on hard software challenges and turn them into durable results. We build agentic products, the platforms they run on, and the engineering and design at every layer. Our commitment to quality means we deliver solutions we’re truly proud of, while our curiosity ...

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 ...

highly-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 software ...

Your ImpactThe Principal Software Engineer shapes and evolves our architecture using Distributed Domain Driven Design practices, ultimately ensuring the robustness and scalability of our systems. They influence architectural directions, and through project-embedded consultation. They guide teams to leverage best practices and design patterns.What You'll DoArchitecture …/Data Model Design and Implementation, including how to scale out, make highly available, or map to storage systems Knowledge of multiple software stacks Skilled with designing and operating software in a Cloud Provider such as AWS, Azure, or GCP Knowledge about algorithm development for intensive pipeline processing ...

Here’s a summary of the role: This is a principal-level role for someone who has already operated at Staff or Principal Engineer level in a sizeable engineering organization and can point to specific platform decisions — in production today — that they own. … leadership depth across the organisation and holding a high bar for engineering standards. These are the essentials you’ll need to get an interview: Principal-level track record at scale. 10+ years of software engineering experience, including at least 3 years' operating at Staff or Principal Engineer ...

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 ...