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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.

You would be joining a squad of Principal engineers with different expertise that serves as a centre of excellence to the 16+ engineering teams in the wider engineering function. If you are a Front End-leaning Principal engineer who wants to combine your experience in web and AI to help unlock other

Strong experience as a backend or systems focused engineer. The engineering team is currently small and senior, with a strong academic and systems background. Senior Backend Engineer | London | £100,000 - £160,000 | Python | FastAPI | Systems.

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 path

Are you a backend engineer who cares more about building robust systems than chasing AI hype?. Engineers work closely with users, own problems end to end, and shape both the technical and product direction in a small, high trust team. Strong experience as a backend or systems focused engineer.

You would be joining a squad of Principal engineers with different expertise that serves as a centre of excellence to the 16+ engineering teams in the wider engineering function. If you are a Front End-leaning Principal engineer who wants to combine your experience in web and AI to help unlock other

Principal Software Engineer / Tech Lead / Founding Engineer opportunity - Tech Start-Up- Remote UK wide - Up to 120k. Morson Edge are delighted to have teamed up with a Tech4Good start up on their search for their first Software Engineering hire. The client are completely open on what the title of t

A leading technology firm in Greater London is seeking a Principal Software Engineer to drive the technical direction for high-profile projects. The role involves leading the delivery of modern, scalable software aimed at creating impactful, human-centered solutions.

A leading retail company in the United Kingdom seeks a Principal Software Engineer to lead high-performing teams and drive engineering excellence. You will shape and inspire the software engineering culture while working with modern technologies like React, Java, and Azure.

The Role: Principal Software Engineer. At the Principal level, engineers are expected to master their immediate domain and have broad impact across other engineering teams. Influence leadership / CTO organization and collaborate with other Principal Engineers across the organization to build the rig

A leading retail company is currently seeking a Principal Software Engineer to join their dynamic team in London. This role involves leading high-performing engineering teams, enhancing engineering excellence, and influencing technology strategy. The ideal candidate will have a deep expertise in sof

As a Principal Software Engineer you are expected to participate in technical discussions to come up with a design to meet Product Requirements, develop test driven code, pair with team members, mentor juniors and support the existing API Platforms. We help our corporate customers, R&D professionals

A leading insurtech company in Greater London is seeking a Principal Engineer to shape the technology direction and drive modernization initiatives. You'll lead by example in designing and delivering resilient, high-quality systems, and mentor junior engineers.

Get notified about new Principal Software Engineer jobs in. An established, global technology business within the hospitality‑tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next‑generation digital solutions. Delivery Consultant @ Fruition

We are on the lookout for a Principal Software Engineer II 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.

A leading fintech scale-up in the UK is seeking a Principal Software Engineer to drive the development of a new credit card product.

Platform - Principal Software Engineer (Billing Team). Proven record of mentoring engineers, setting technical direction, and elevating engineering quality standards. Extensive experience (8+ years) in backend or platform engineering, with strong expertise in Python and PostgreSQL (schema design, pe

A leading cloud and software engineering consultancy in Greater London seeks a Principal Software Engineer to provide senior technical leadership. You'll design and evolve scalable software systems, mentor engineers, and influence architectural standards.

As a Software Development Engineer at Autodesk Research, you will work side‑by‑side with world‑class researchers and engineers to build new ML‑powered product features that help our customers imagine, design, and make a better world. Principal Software Development Engineer - CAD/Geometry. Yo

I’m working with one of our major Financial domain clients based in Central London, and they’re looking for a.This role requires a highly skilled, hands-on professional who is passionate about technology and finance, experienced in working within a low-latency enterprise event-driven architectur

Share knowledge with the wider engineering community, mentoring and developing those around you to improve the organisation. Experience across large engineering organisations.

We are looking for a Principal Software Engineer who will play a defining role in shaping our platform, our teams, and our technical future. We design and operate a software platform that orchestrates robots, instruments, data pipelines, and increasingly AI-driven workflows — helping labs move fro

Champions quality and security, embedding testing and scanning into CI/CD pipelines and engineering workflows. Passionate about mentoring engineers, conducting code reviews, and driving technical excellence across teams. You will work with like-minded people from business, product and engineering fu

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

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

Salary: Circa £65k + Up to 15% Bonus Sponsorship:**Unfortunately, we are unable to offer sponsorship for this role If you're a Principal Software Engineer, who enjoys architecting complex systems, owning technical decisions, and crafting Python‑powered solutions that make a real impac

A leading technology company is seeking a Principal Software Engineer in London to collaborate with AI researchers and bring innovative health solutions to market. The ideal candidate will have a background in software engineering, knowledge of distributed systems, and a passion for user experience.

Snyk is the leader in secure AI software development, helping millions of developers develop fast and stay secure as AI transforms how software is built. At least 10 years of commercial software engineering experience, with a proven track record of leading the design and delivery of large‑scale, c

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

A leading software development firm in London is seeking a Principal Software Engineer to lead the architectural evolution of their platform. The ideal candidate has over 12 years of software engineering experience, deep expertise in distributed systems, and exceptional leadership skills.

They’re now looking for a Principal Software Engineer to provide senior technical leadership across multiple delivery engagements and to help shape how modern software is built, evolved, and maintained. We (SR2) have partnered with this highly regarded cloud and software engineering consultancy th

Senior Principal Software Engineer. You will interact with architects, software and data engineers, AI/ML modelers, product owners as well as other team members across R&D. Software Engineering & Application Development.

A global technology company is looking for a talented principal engineer in Greater London. The ideal candidate will be responsible for managing complex technical problems, leading engineering teams, and developing innovative products that enhance user experience.

A leading crypto platform in London seeks a Principal Software Engineer to define technical direction and tackle complex architectural challenges. The ideal candidate has 8-10 years of software development experience, primarily in Python. Responsibilities include influencing software architecture, m

Principal Software Development Engineer - CAD/Geometry page is loaded## Principal Software Development Engineer - CAD/Geometrylocations: EMEA - United Kingdom - London - Agar St: EMEA - United Kingdom - Birmingham: EMEA - United Kingdom - Offsite/Home: EMEA - United Kingdom - Cambridge - Aut

They are looking for a Principal Software Engineer to help shape the future of digital services. Setting the technical direction of software engineering and helping to define best practice. You'll join a forward-thinking Head of Engineering who is transforming the team to deliver smarter, more effic

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 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

Were looking for a Principal Software Engineer to shape the technical direction of high-profile projects and lead the delivery of modern, scalable software. Youll provide hands‑on technical leadership, working closely with senior stakeholders, mentoring engineers across multiple teams, and line ma

A leading foreign exchange provider in the UK is looking for a Principal Software Engineer to shape their technology platforms.

As hiring managers, we know TA is a critical function, and as engineers, we know software can do better. As a result, process stifles the best engineers and doesn’t give others the opportunity to practice the behaviors that made the best engineers the “best. Our Engineering Culture Is Motivated

As our Principal Software Engineer, you ll be a technical authority across our digital platforms, combining architectural vision with practical delivery. Mentor and influence engineers at all levels, raising the bar for technical excellence. This is a senior, hands‑on technical leadership role whe

This Principal Software Engineer role is designed for a hands‑on technical leader with strong C++ and Unreal Engine expertise, working at the forefront of complex, performance‑critical software delivery. The position sits within a fast‑growing software and data science consultancy delivering e

Oliver Wyman is seeking a Principal Software Engineer (Cloud) to join our Retail Solutions team in the UK, with London or Newcastle being our preferred office locations but we can offer some flexibility. A strong understanding of software engineering best practices such as version control, CI/CD, au

Recruit, mentor and lead a lean, high‑impact engineering team. Formal training or certification on React engineering concepts and proficient expert experience.

We’re looking for a Staff/Principal level Product Engineer (Individual Contributor) with a focus on frontend development to join our small, highly talented team at Gizmo. While we have a deliberately flat structure, this is a senior, high-impact role for an experienced engineer who can take owners

Elasticsearch - Principal Software Engineer II - Distributed Systems. Principal Software Engineer II. Supporting our support engineers with the harder problems.

A leading staffing agency is seeking a Principal Software Engineer for a remote role in the UK. The ideal candidate will possess expertise in multiple programming languages, including Python and JavaScript, and have a passion for creating high-quality software.