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Work to revolutionise flight operations with modern tech London hybrid / mostly remote; to £100,000 DoE plus benefits This growing team of experts in flight and aviation are building a new platform and seeking senior engineers to join them.

As a Principal Engineer in the Boost team, you'll be part of a group of principal engineers who champion technical excellence.

Principal Software Engineer / Developer (Java Spring Boot AWS) London / WFH to £120k. 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

Solid experience as a software engineer with a proven ability to deliver complex features on production systems. This is a hands-on engineering role at the heart of a significant platform transformation. Use AI natively in your engineering work, as part of how you think through problems, generate an

You will work in software engineering teams performing design, implementing code, testing, delivering software to customers, and continue supporting the software in production. Invest in the best engineering and operational practices upfront to ensure our software quality bar is high. Leverage indus

Main Responsibilities of the Principal Electronics & Embedded Software Engineer (Cambridge): Develop electronics and embedded software(C/C++) for diverse and technically complex new products Lead the integration of electromechanical product designs through to manufacture and production transfer Take

Principal Software Engineer (Python, AI) London, England, United Kingdom 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

We would particularly like to encourage applicants with experience in the following areas: Platform engineering: building reusable software foundations, internal developer platforms, and infrastructure that other teams build on Data Engineering: including platforms like Databricks for data proce

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 forums, governance forums, security etc. Ensure the applications are built in adherence to Intact, and established industry sta

London, England, United Kingdom 4 days ago London, England, United Kingdom 4 days ago London, England, United Kingdom 1 month ago London, England, United Kingdom 1 month ago London, England, United Kingdom 19 hours ago London, England, United Kingdom 2 weeks ago London, England, United Kingdom 2 wee

Role Description Principal Software Engineer – Data Technology Platforms 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 Enginee

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. As a Principal Engineer, you will act as a technical authority acro

MARKS&SPENCER is seeking a Principal Software Engineer to lead the modernization of mission-critical systems within our Supply Chain and Logistics teams. This role requires a deep understanding of clean code practices, system design, and significant experience in cloud computing and DevOps to foster

Role Overview 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. Staff or Principal Engineer level in an organization o

Mentor and coach senior engineers across teams, elevating the technical bar and championing Software Engineering Communities of Practice. As a Principal Software Engineer at JPMorgan Chase within the Accelerator Business in the Platform Team, you are the heart of this venture, focused on getting sma

Elastic is seeking a Principal Software Engineer focused on Search Scaling in London, United Kingdom.

Responsibilities * This is a principal‑level, advisory role for an engineer who has built production‑grade distributed systems before, is accountable for strategy and scale, deeply opinionated about data quality, and wants to operate at the intersection of engineering excellence and real‑world

About The Role Join the Software Engineering team where you will play a crucial role in developing, enhancing, and transforming our investment reporting platform, Serpentine, a web application written using Python and Django. Architect and implement new software solutions, leading the overall struct

Solid understanding of software engineering best practices, including testing, code review, and documentation. Own technical planning: break down roadmap items into well-scoped engineering work, lead estimation, and drive architectural decision records (ADRs). Collaborate with front-end engineers to

This role is often a strong fit for engineers who have previously served as Principal or Staff Engineers, Heads of Engineering, CTOs, or Solutions Architects and who enjoy working directly with customers while staying deeply involved with complex technical systems. Inside the Professional Services d

Deep hands-on experience with Java/Spring and full-stack development Strong experience with Domain-Driven Design (DDD) and modern system decomposition Proven delivery of microservice-based architectures Strong React experience and modern frontend practices Experience improving engineering ef

Apply for Principal Software Engineer SC & L at Marks & Spencer in London, England. Reports To Senior Head of Software Engineering, M&S. Prior software engineering community leadership experience.

Principal Software Engineer - PythonTitle:Principal Software Engineer – Python Department:Procode IT Location:Hybrid – Commutable distance of either Chandlers Ford or Oxford Salary:Circa £65k + Discretionary Bonus Scheme Sponsorship: Unfortunately, we are unable to offer spo

We are looking for a Principal Software Engineer to provide senior technical leadership across our International Fashion, Home & Beauty domain. With ethical values at the heart of the business and technology leaders who understand modern software engineering, this is an exciting time to join us as w

As a Principal Software Engineer at JPMorgan Chase within the International Consumer Bank, you will play a crucial role in this initiative, dedicated to delivering an outstanding banking experience to our customers. Required Qualifications, Capabilities and Skills * Formal training or certification

Summary The Principal Engineer is the most senior engineer in the company and plays a crucial role in delivering our business goals. Mentorship & team development * Mentor and coach engineering managers, staff, and key engineers to develop technical and leadership skills. Being creative, curious, an

Summary The Principal Engineer is the most senior engineer in the company and plays a crucial role in delivering our business goals. Mentorship & team development * Mentor and coach engineering managers, staff, and key engineers to develop technical and leadership skills. They are technical leaders

As a Principal Software Engineer, you will be responsible for: Analyzing system performance, identify problems, design, develop, and implement solutions Designing and implementing scalable, high-quality software solutions to meet complex technical requirements and business needs. Do you have a p

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. The Role As Principal Mobile Engineer you own the technical direction of our consumer iOS, Android and web

A leading information and analytics company in Greater London is looking for a Consulting/Principal Software Engineer to lead cross-functional teams. Ideal candidates will have over 7 years of software engineering experience and strong leadership abilities.

As a Principal Software Engineer at JPMorgan Chase within the International Consumer Bank, you will play a crucial role in this initiative, dedicated to delivering an outstanding banking experience to our customers. Required Qualifications, Capabilities and Skills * Formal training or certification

LexisNexis Risk Solutions is looking for a Principal Engineer to guide technical direction and foster a culture of excellent engineering practices. The role requires extensive experience in software architecture, cloud-native solutions, and a strong background in various programming languages.

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. Drive Technical Leadership – Define and champion so

Chainguard is seeking a Principal Engineer to lead the technical direction of the Athena clearing house, focusing on building production-grade systems.

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. Requirement

Simple Machines in London is seeking a Principal Software Engineer to lead delivery of complex, scalable systems across backend services, APIs, frontend components, data pipelines and cloud infrastructure. This hands-on role collaborates with engineering teams and clients, owning outcomes end-to-end

Our Software Engineers don't just implement solutions—they discover new patterns of working with AI thatrevolutionise entire business processes. We work with enterprise organisations on a global stage, reinventing how they design, build, and operate AI powered software at scale with speed. Key Res

Principal Software Developer in Test (SDET) Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: Permanent Drive test automation innovation and engineering excellence in financial technology The Role As a Principal SDET at Capco, you'll lead the strategy, architecture, and imp

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 with software engineers, data engineers, and data scientists to deliver trusted so

Principal Software Engineer | Architecture | TypeScript | Node js | AWS | Hybrid | London Location - London (office-led) High Ownership, Modern Stack, Hands-on Leadership We're looking for a Principal Software Engineer to help shape the future of a large-scale, globally distributed platform used by

In your previous experience, you have: Demonstrated long‑term success on high‑stakes consulting engagements across multiple language paradigms, stacks, ecosystems, technical environments, and client industries Built high‑quality, maintainable software collaboratively, incrementally, and th

Marks and Spencer is searching for a senior software engineer to join their renowned Software Engineering team, driving strategic product development. This role focuses on enhancing technical excellence, spearheading innovation in engineering practices, and influencing product strategy, playing a pi

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.

Principal Software Engineer – Go | Distributed Systems £160,000-£200,000 + 15% bonus + Equity Go/Python/Rust - Kubernetes, AWS, Distributed Systems Hybrid (Central London, 3 days a week in office) Broad/Complex Technical Environment Well-funded Series B deep-tech company We’re partnered with a

Principal Software Engineer (Python, AI) London, England, United Kingdom Summary 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 that they own. Staff or Prin

As a Principal Software Engineer within AI Governance Engineering, you will design and build platforms and shared services that enable teams to develop, deploy, and operate AI/ML solutions with compliance and governance seamlessly integrated. Required Qualifications, Capabilities, and Skills * Profe

Overview TL;DR: We're seeking exceptional senior engineers and technical leaders for our Product team to help build the future of AI software creation. Why Lovable Lovable lets anyone and everyone build software with any language. We are at the forefront of a foundational shift in software creation,