126 to 150 of 258 Principal Engineer Jobs in London

whoever they want to be, because we believe people who bring their best selves to work, do their best work. Job DescriptionAs a Principal Software Engineer, your goal is to make engineering, and our engineers, better every day. You are approachable and collaborative, and you actively nurture … right experience for the job, but don't hit every piece of criteria, we would still encourage you to apply!A highly experienced, senior engineer with a proven record of guiding multi-discipline teams through the full delivery lifecycle of complex, large-scale, distributed software systems.Deep, hands-on experience ...

Principal Backend Engineer/Developer (Java Spring Boot Kafka AWS) London/WFH to £120k Are you an experienced Java Software Engineer who enjoys taking technical ownership, leading projects and working directly with clients? You could be progressing your career at a global technology consultancy, working ...

seeking a Principal Backend Engineer to lead the technical evolution of Diesta’s backend platform. This is a deeply technical role for someone who can make difficult architectural decisions, set a high engineering bar and help the team scale a complex, data-intensive system with confidence. You will … architectural decision records, API and data-contract documentation, and operational guidance that humans and AI agents can use safely. What We’re Looking For Principal-Level Backend Experience : Substantial experience designing and evolving production backend platforms, with a track record of technical leadership in complex, high-scale systems. NestJS ...

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 learning. ...

annum + Benefits London Permanent We're looking for an experienced Principal Software Engineer to join a growing technology business developing complex autonomous systems.Reporting directly to the CTO, you'll combine hands-on engineering with technical leadership, shaping architecture, supporting engineers and facilitating Scrum delivery.Experience developing software … into clear engineering plans.Facilitating sprint planning, stand-ups and retrospectives.Mentoring engineers, reviewing code and maintaining software quality.What we're looking for:Senior, Lead or Principal-level experience, with development skills in Embedded C, C++ and Python.Experience with embedded software, real-time systems and hardware/software integration.Strong technical leadership ...

employed by Rockford Payroll.Rockford Payroll is responsible for the Associate’s employment, pay andapplicable employment-related processes. The Role We are seeking avisionary Principal Data Engineer to lead the delivery of innovative dataanalytics solutions, with a focus on technical excellence, governance, andoperational performance in a high-volume data ...

team driven by our common purpose to deliver a better world. Join us. Job Description Start here. Grow here. We are seeking an experienced Principal Rail Telecommunications Engineer to lead the design, assurance, delivery, and support of telecommunications systems across major rail infrastructure projects. As a senior technical … fibre optics, IP networking, GSM-R, CCTV, PA, CIS, and telecoms transmission systems. Experience working within Network Rail or major rail infrastructure environments. Chartered Engineer (CEng) status or working towards professional registration is desirable. Excellent communication, leadership, and stakeholder management skills. Additional Information #BESPECIALISMS#BES&T To support this commitment ...

Bulgaria, China, Australia, and UAE. Interested in joining our smart, fun, and talented team? Position Overview Fourth is actively seeking an experienced and pragmatic Principal Platform Engineer to join our worldwide team. We are progressing rapidly in developing automated, highly reliable, and zero-downtime infrastructure pipelines that ...

Trayport seeks a Principal Platform Engineer to anchor our Platform/Operations in London. The role is 70% hands-on—designing, building and operating infrastructure for a global trading platform, and mentoring the broader team. You will drive cloud engineering across AWS and Azure, own networking design ...

About the role BigHand builds software that legal organisations rely on every day. Following our acquisition of Ayora AI, we are looking for a Principal Backend Engineer to own the data engineering and infrastructure behind our Agentic AI systems. This is a senior, hands-on individual contributor role … work at the heart of the feature expansion and optimisation of our stack. You will also mentor and support a mid-level backend engineer, helping them grow into a senior role. Ayora’s Product can be found here: https://www.ayora.ai/BigHand’s Products can be found ...

creativity and innovation to build intelligent digital products, platforms and experiences for some of the world's most ambitious brands. As a Lead/Principal AI Engineer, you'll design, build and deliver production-grade AI systems, intelligent workflows and agentic solutions that power modern digital experiences. From ...

looking for an experienced Principal Systems Engineer to support the design, integration, testing, and delivery of complex engineering systems. The role involves working across the full systems lifecycle, from initial concept and requirements through to verification, acceptance, and customer delivery. The successful candidate will work with multidisciplinary teams ...

predictive modelling and clinical analytics by standardising and safeguarding complex healthcare datasets. What will you do Reporting to a Director of Engineering, as a Principal Data Engineer/Architect , you will lead the strategic vision and hands-on execution of our next-generation Object-Centric Data Fabric . ...

join us in our London office as we continue our journey to help make our clients successful. We have an opportunity for a Principal Mechanical Engineer to join our team, working on a variety of high‐tech building design and construction projects. Project focus would initially be data … providing an opportunity to build your career and your team to serve this expanding sector. The key tasks and responsibilities are as follows: The Principal Building Automation Engineer will lead either multi-disciplinary or controls‐specific engineering teams to develop and review Instrument & Controls Engineering design packages, perform ...

JPMorgan Chase & Co. in the UK seeks a Principal Software Engineer to lead the design and delivery of high-traffic, customer-facing financial features within the International Consumer Bank. You will ensure reliability, performance, and security at scale in a globally distributed team. The role emphasizes AI-enabled ...

take their career to new heights. Join the ranks of top talent at one of the world’s most influential companies. As a Principal Software Engineer at JPMorganChase within the Chief Data & Analytics Office (CDAO) AI/ML Data Platforms Team, youprovide deep engineering expertise and work across ...

Strategic Enterprise Technology Leadership Recognised Java Engineering Expertise Advanced Architecture & Systems Integration Capability What this role is all about We're looking for a Principal Software Engineer to join Vitality's Engineering function, providing technical leadership across complex enterprise platforms and customer-facing solutions. This is a highly ...

Northrop Grumman UK is seeking a Principal Software Engineer to design, develop, and maintain the critical infrastructure powering our services. You will lead multiple engineering teams, set technical direction, and deliver solutions with real customer impact. You’ll mentor engineers, collaborate with partners and customers, and ensure delivery ...

Prior experience with these specific tools isn't required — we're happy to support your learning where you have less experience. Our most recent Principal Engineer hire came predominantly from a Java background, even though there's no scope to use Java in the role. ...

AI. What is The Role Elasticsearch powers search, observability, and AI retrieval (RAG) for the world's largest organizations. We are seeking a Principal Software Engineer to join the Elasticsearch Performance team. In this role, you will lead architectural and code-level performance engineering initiatives. Your goal ...

7.2bn for the UK economy. Come and join a mission that matters! London (Hybrid) | 2 days in the office | Competitive Salary + Benefits As Principal Data Engineer you are the primary technical authority for Funding Circle's Data Engineering and Data Platform architecture, designing innovative solutions on Snowflake … lift each other up and think smart every day. A minimum of 10 years of experience in Data & Analytics, with experience in Staff, Principal (or equivalent) roles in Data Engineering, Data Architecture, or Data Platform, ideally within digital products or FinTech. Extensive hands-on experience designing, building and operating ...

202606861Category: Data GovernanceLocation: Ipswich, Suffolk, United Kingdom; United KingdomSchedule: Full timePosted: 2026-11-11We are seeking an experienced, hands-on Principal Data Engineer to play a key technical role within our Enterprise Data Products team.Enterprise Data Products is progressing through a significant technology transformation and rearchitecture. ...

building the next generation of digital health – AI-powered, privacy-first, clinically backed – to help our users know their body better. The job Principal Infrastructure Engineer More than 80 million women open Flo every month to understand their bodies and their health. Every one of those sessions runs … personal as data gets. Keeping that fast and private at this scale is the job. Velocity runs the platform that every Flo engineer builds on: Kubernetes on AWS, the data stores behind our services, and the golden paths that let product teams ship without needing to be infrastructure experts. ...

Exceptions above the standard range are managed through governance controls to protect internal equity. Your Impact Leonardo is looking for a 3rd Line Platform Engineer to join our collaborative and skilled team supporting a critical MOD site. This is an exciting opportunity to serve as a Subject Matter Expert … defence and aerospace operations. This role is based full-time on site in London and requires DV clearance. What you will do as a Principal Platform Engineer: Take ownership of complex technical issues through to resolution, collaborating with users and other IT teams. Provide expert-level troubleshooting ...

leading technology firm in Greater London is seeking a Principal Software Engineer to design, develop, and maintain critical infrastructure. This role involves ownership of team deliverables, collaboration with external partners, and mentoring engineers. Candidates must have strong capabilities in backend and frontend development, design scalable systems, and familiarity ...