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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.

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

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. Background in resilience engineering, chaos testing, disaster r

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

Senior Backend Engineer | London | £100,000 - £160,000 | Python | FastAPI | Systems. The work is focused on the engineering around AI: evaluation, control, reliability, and building systems that behave predictably in production. Engineers work closely with users, own problems end to end, and shape

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 Software Engineer (London Only). Our pay ranges for our Principal Engineer position within London is: £92-818-£116-122 GBP. Built high‑quality, maintainable software collaboratively, incrementally, and through an approach tailored towards the unique needs of the clients you’ve served

As our Principal Software Engineer, you ll be a technical authority across our digital platforms, combining architectural vision with practical delivery. This is a senior, hands‑on technical leadership role where you ll influence architecture, guide engineering standards, and deliver enterprise‑

It was a formative experience for me as a software engineer because success relied on my ability to be a product manager and designer. Our Engineering Culture Is Motivated By Benji’s (my Co‑founder And CEO) And My Belief That a Small, Talented Team, Given The Right Environment, Can Build High‑

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. Principal SW Engineering or SW Architect roles. A strong understanding of software engineering b

A leading technology solutions provider in London is seeking a Principal Software Engineer to guide technical direction and deliver high-quality solutions for clients. The candidate will leverage extensive experience in consulting and software engineering to drive innovation and mentor teams. Respon

NET Software Engineers to drive this evolution. Drive performance optimisation and system reliability through intelligent engineering. Champion engineering excellence in architecture, code quality, and delivery.

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

As a senior member of the development team reporting to an Engineering Manager, you will serve as a principal engineer. Your responsibilities will include designing fault‑tolerant microservices, building scalable web and mobile UIs, and fostering an engineering culture that prioritises metrics ove

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.

We’re looking for a Principal Software Engineer to shape the technical direction of high-profile projects and lead the delivery of modern, scalable software. You’ll provide hands‑on technical leadership, working closely with senior stakeholders, mentoring engineers across multiple teams, and l

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

At least 7+ years of experience in software engineering. Lead the end-to-end design and delivery of software solutions involving Wargames, Robotics, Autonomous systems, and Digital Twins. Lead small delivery teams and oversee the line management and performance of engineering staff.

Principal Software Engineer - Metadata. Solve real business needs at large scale by applying your software engineering and analytical problem‑solving skills. Ability to work effectively across engineering teams in multiple locations.

Senior/Principal Software Engineer (PHP, MySQL, AWS). Join to apply for the Senior/Principal Software Engineer (PHP, MySQL, AWS) role at Arrive. Knowledge of modern software engineering practices, CI/CD, and DORA metrics.

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. Drive a healthy engineering function, ensuring pace is balanced with the needs of engineers, towards a sustainable model. Prior CTO (at a startup), Principal E

You will work with like-minded people from business, product and engineering functions to develop and refine client journeys covering onboarding, KYC, account management and investment workflows in a secure and compliant environment. Building and deploying scalable, secure, and compliant software at

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.

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

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

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 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.

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.

Member of Technical Staff - Principal Software Engineer. Build the hiring pipelines, onboarding frameworks, or software development best practices as needed to scale an engineering team around you. Bachelor’s or higher degree in Computer Science, or related technical discipline AND strong software

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 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

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

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

A leading technology firm in Greater London is seeking a Principal Software Engineer to shape the technical direction of high-profile projects. You will lead the design and development of scalable software solutions while mentoring engineers and managing a team.

A leading tech solutions provider in Greater London seeks a Principal Engineer to guide projects that leverage AI/ML, deliver high-quality software, and build strong client relationships.

A well-known retailer seeks a Principal Software Engineer to lead high-performing teams and drive engineering excellence. Ideal candidates will have a strong background in software engineering practices, cloud platforms, and team leadership.

Senior Systems & Regulatory Software Engineer. Systems / Regulatory Software Engineer. Hybrid working with a Kent-based engineering hub.

A global information analytics company is seeking a Principal Software Engineer to enhance its API Platforms, focusing on design, development, and mentor junior team members.

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

As the Principal Engineer, Software Supply Chain Security, you’ll own the technical strategy that secures how software is built and delivered on GitLab’s DevSecOps platform. Experience operating as a Principal or Staff Engineer across multiple development teams, providing architectural leadershi

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.

Principal Embedded Software Engineer - Southampton - £70k - £80k. Hexwired Recruitment has partnered with a world renowned Electronics manufacturer based in Southampton who are now seeking a Principal Embedded Software Engineer to help develop and maintain a brand new system the company is develop

As part of the M&S Software Engineering team, you'll be joining a well-loved historic brand, working on solutions that serves millions of loyal customers and thousands of colleagues! With ethical values that run right through the company's core and technology leaders that truly understand software e