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Touchstone Advisory, a leading UK independent valuation advisory firm, is seeking an exceptional Principal Software Engineer to lead the evolution of our proprietary valuation platform—from a proven proof of concept to a robust, market-ready product. You will be both the hands-on technical lead an

NET Software Engineers to drive this evolution. They're engineering a robust, merchant-centric ecosystem built on quality, resilience, and scale - and they need exceptional. Drive performance optimisation and system reliability through intelligent engineering.

Harrington Starr has partnered with a leading Global Payments Technology company who are seeking to hire a Principal Software Engineer to join their senior engineering leadership team. Provide leadership and mentorship across multiple engineering teams.

Senior Systems & Regulatory Software Engineer. Systems / Regulatory Software Engineer. Engineering-led culture that values.

Join OCI’s Edge Security team as a Principal Engineer to architect and deliver cloud-scale DDoS protection. Mentor engineers, influence cross-org roadmaps, and collaborate with Product, SRE, and Network Engineering from concept to GA. This role requires deep expertise in Linux networking data path

Senior, Staff & Principal Engineers. Senior: 90-115k | Staff: 120-135k | Principal: 140-160k.

This is a hands-on, Principal-level Individual Contributor (IC) role designed for a technical pioneer. You will operate with significant autonomy, influencing the technical strategy for our key products and mentoring senior engineers. Mentor and guide senior and mid-level engineers on modern, sustai

About The RoleDeadline for applications: 11:59pm on 31st October 2025Were looking for a Principal Software Engineer to shape the technical direction of high-profile projects and lead the delivery of modern, scalable software. We believe great engineering happens when teams collaborate,.

This is a hands-on, Principal-level Individual Contributor (IC) role designed for a technical pioneer. You will operate with significant autonomy, influencing the technical strategy for our key products and mentoring senior engineers. Mentor and guide senior and mid-level engineers on modern, sustai

Principal Software Engineer Location: Edinburgh, United Kingdom Contract Duration: 12 months Rate: £63. Role OverviewAn experienced Principal Software Engineer is required to join a. UmbrellaWe seek an engineer with recent high-integrity or safety-critical industry experience (defence, aerospace, o

Principal Software EngineerSalary: Negotiableplus benefits, pension (7% contribution), 25 days holiday & life insuranceWe are looking for principal software engineers with diverse experience.

Touchstone Advisory, a leading UK independent valuation advisory firm, is seeking an exceptional Principal Software Engineer to lead the evolution of our proprietary valuation platform—from a proven proof of concept to a robust, market-ready product. As the technical leader of our software functio

We are looking for principal software engineers with diverse experience.

Principal Software Engineer | Payments | Credit Card Product. The team are hiring a Principal (or Staff) Software Engineer to drive and support the delivery of a new credit card product. They combine a modern, data‑driven approach to product development with software engineering best practices.

We are looking for principal software engineers with diverse experience.

A leading consultancy firm is seeking a Technical Lead - Principal Software Engineer to join their team in London or Cambridge. Ideal candidates will have over 8 years of experience in software engineering, a relevant degree, and strong leadership skills.

Principal Engineer – Join a profitable FinTech Scale-Up. As they continue to grow, they are looking for a Principal Engineer to lead the next phase of innovation across their most critical product. Lead the re-architecture of the team’s code, collaborating with principal engineers in other teams

A leading software company is seeking a Principal Software Development Engineer to work on CAD/Geometry products. Applicants should have a Bachelor's in engineering or Computer Science, with over 8 years in software engineering, particularly in CAD or 3D applications. This role involves developing s

As a Principal Software Engineer, you will play a senior technical leadership role across Appvia’s software delivery engagements. We partner with customers across public and private sectors to reduce technical debt, improve engineering practices, and support long-term system evolution using modern

Technical Lead - Principal Software Engineer. Degree in computer science or software engineering, with at least 8 years of relevant work experience, including experience in technical leadership and people management. We are looking for a highly motivated individual to become a Software Engineering T

Get notified about new Principal Software Engineer jobs in London, England, United Kingdom. Join Monolith as a Principal Software Engineer. Apply now to lead the architectural evolution of our platform as we scale to meet growing demand from the world's largest engineering companies.

Our engineering culture strives to recreate the environments where we did our best work as ICs – where we had the ownership and agency to impact our users with creative and innovative software. We rely on engineers owning their projects, so we need engineers with that experience. As a result, proc

We are seeking an ambitious, self‑motivated Principal Software Engineer to provide technical and strategic leadership for the Data team and shape the platform’s evolution. Principal Software Engineer - Data. Strong experience with cloud infrastructure and modern engineering practices, and the ab

Principal Frontend / Platform Engineer (Contract). Principal-level engineer who can own the frontend end-to-end,. This is a rare opportunity to define how frontend engineering is done at enterprise scale — not just writing components, but shaping the entire frontend platform that others will build

Mentor engineers, influence cross‑org roadmaps, and collaborate with Product, SRE, and Network Engineering from concept to GA. Join OCI’s Edge Security team as a Principal Engineer to architect and deliver cloud‑scale DDoS protection. This role requires deep expertise in Linux networking data

A leading cloud and software engineering consultancy is seeking a Principal Software Engineer to provide senior technical leadership across multiple delivery engagements. The role involves influencing architectural decisions, mentoring engineers, and working on scalable software systems. This positi

Software Engineer, Principal - GenAI / ML. As a Principal Engineer, you will lead a high-impact team focused on advancing Infor MES by leveraging Infor OS technologies to design, develop, and deliver cutting-edge Generative AI and Machine Learning solutions. Collaborate closely with cross-functional

Principal Software Engineer (London Only). Our pay ranges for our Principal Engineer position within London is: £92-818-£116-122 GBP. A track record of understanding, assessing, and embracing new tooling and trends within the software industry.

A Fintech going through a huge transformation is looking for Principal Engineers to join the team and play a key role in shaping their future technology and engineering practices. As a Principal Engineer, you will apply your technical expertise and hands-on skills to tackle sophisticated engineering

We are on the lookout for a Principal Software Engineer I to join our Elasticsearch - Distributed Systems team and focus on how Elasticsearch provides scale, performance, and resilience. Supporting our support engineers with the harder problems. You have experience managing projects involving multip

This is a hands‑on technical role where you'll shape the design, guide the team, and ensure successful delivery of a critical transformation project.Collaborate with a cross‑functional team (including React developers) to ensure seamless integration of front‑end and back‑end.Build credibilit

As a Principal Systems Engineer, you’ll lead a team of talented, collaborative engineers working across Cloudflare’s ecosystem. Principal Systems Engineer - Billing. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a li

At least 10 years of commercial software engineering experience, with a proven track record of leading the design and delivery of large‑scale, complex, and ambiguous technical projects. Snyk is the leader in secure AI software development, helping millions of developers develop fast and stay secur

A specialist cloud consultancy in London seeks a Principal Software Engineer to lead software delivery engagements. This hybrid role requires strong experience in modern software architecture and a consulting mindset. Responsibilities include leading design and delivery of scalable systems, mentorin

Principal Embedded Software Engineer. Principal Embedded Software Engineer. Strong debugging skills across hardware–software interfaces.

As a Principal Engineer at JPMorgan Chase within the Accelerator, you are the heart of this venture, focused on getting smart ideas into the hands of our customers. Recruit, mentor and lead a lean, high‑impact engineering team. Formal training or certification on React engineering concepts and pro

We are looking for a Principal Engineer to serve as the technical anchor for our organization. Principal Engineer – Role Overview. We are looking for a Principal Engineer who can bring a depth and breadth of experience to help shape this journey; working in a role with a high level of ownership, e

Principal Software Engineer, Snyk Code (SAST). Join to apply for the Principal Software Engineer, Snyk Code (SAST) role at Snyk. As a Principal Software Engineer on the Snyk Code team, you will be responsible for driving our technical future and tackling our most difficult and strategic challenges i

Member of Technical Staff - Principal Software Engineer. Profession: Software Engineering. Discipline: Software Engineering.

A leading software company is seeking a Principal Engineer (Web) to lead the design and development of scalable web platforms. The ideal candidate has over 10 years of software development experience, including 3 years in a senior role, and possesses a strong technical background in web architecture

Elasticsearch - Principal Software Engineer II - Storage Engine. Principal Software Engineer II. That's even harder but we do it anyway because it's the best way we know how to build software.

Systems / Regulatory Software Engineer. Senior Systems & Regulatory Software Engineer. You will work at the heart of a multidisciplinary engineering team, helping to.

We are looking for a Principal Software Engineer (we call them Principal Software Craftspeople) who shares the same values of pragmatism, professionalism and transparency as us to join our team. You bring deep hands-on experience in software engineering, particularly modernisation, with a track reco

A leading technology consulting firm in London is seeking a Principal Software Engineer to drive technical direction and client engagement. This role requires extensive experience in software development, particularly with AI and ML technologies.

As we continue to expand our market share in the rapidly emerging Employee Experience platform category, we are looking for a Principal Engineer to join our Engineering Team. The Principal Engineer is the pinnacle of technical influence within the engineering organisation, setting the technical visi

Java Lead Principal engineer – Java, AWS, MongoDB, Architecture, design - UK remote, Outside contract. We are working with a business who are rebuilding their core platform from the ground up and are looking for a Lead Principal Java engineer/architect who’s up for a real challenge. Refactor and

Elasticsearch - Principal Software Engineer I (Distributed Systems). Principal Software Engineer I - Distributed Systems. We are looking for a senior engineer to join our Elasticsearch - Distributed Systems team and focus on scale, performance, and resilience.

Veteran developer who enjoys being hands‑on while serving as a technical leader and mentor for senior engineers. Identifying cross‑cutting technical hurdles and driving the adoption of solutions across the entire engineering organisation. Working alongside Product Managers to turn business goals