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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.

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. Raise engineering quality, automation, and compliance maturity

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

Principal Software EngineerPortsmouth | Hybrid, 3 days onsite£75,000-£85,000 plus bonus and benefitsThis 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 deli

Principal Software Engineer – Manchester – eCommerce - 90k+10% Bonus Great opportunity for a Principal Software Engineer to join a Manchester based eCommerce giant as they work on a large-scale digital re-platform across the estate to MACH and Event-Driven Architecture.

Principal Software Engineer Edinburgh An innovative and well-established med tech company are seeking a proven technical leader to join its R&D team basedin central Edinburgh as a Principal Software Engineer.

A global management consulting firm is seeking a Principal Software Engineer (Cloud) to join their Retail Solutions team in the UK. The ideal candidate will have strong cloud engineering skills and experience in software development, especially in JavaScript and Python.

A leading global technology provider is looking for a Software Engineer in London to drive technical excellence and mentor engineering talent. Join a team committed to shaping a best-in-class engineering culture and making a meaningful impact in technology.

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 structural design and

Collaborate with engineers, product managers, and stakeholders to deliver reliable, scalable features. Degree in Computer Science, Engineering, or equivalent experience. Interest in financial services or experience in B2B software is advantageous.

Principal Software Engineer - React Native - Executive Director. Recruit, mentor and lead a lean, high‑impact engineering team. Formal training or certification on React engineering concepts and proficient expert experience.

A leading global biopharma company is seeking a Senior Principal Software Engineer in London. The ideal candidate will have a robust background in software development, data engineering, and AI/ML technologies.

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. Apply prompt engineering techniques for optimal LLM performance.

Do you have a passion for making systems run as efficiently as possible? Join our innovative team.Our Cloud Technology Group’s Compute division, formerly Linode, consists of collaborative, inclusive, and creative teams that develop applications and services to empower our customers.Our mission is

Principal Software Engineer – Drive Social Impact Through Tech. Are you a tech leader passionate about using software to create meaningful change? We’re seeking a. Passion for ethical software development and social impact.

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

A growing consultancy in the UK is seeking a Principal Software Engineer to lead the design of complex digital twins and provide strategic advice to key defense stakeholders. The ideal candidate will have over 7 years of software engineering experience, strong proficiency in C++ and Unreal Engine 5,

A leading technology recruitment agency is seeking a remote-first Principal Engineer for a key role with a client known for their high-performance software solutions. The ideal candidate will have over 10 years of software engineering experience, expertise in C# or Java, and a solid grasp of cloud t

Principal Software Engineer | London | £120k to £160k + benefits | Python. This is serious engineering in a fast moving space, with high expectations around quality, reliability, and judgement. Taking real ownership over the software you build.

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. You are a software engineer who is passionate about solving pr

Elasticsearch – Principal Software Engineer II – Storage Engine. Principal Software Engineer II. Elasticsearch – Principal Software Engineer II – Storage Engine.

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

It was a formative experience for me as a software engineer because success relied on my ability to be a product manager and designer. While they lead product and technical areas and help other engineers plan their most challenging work, it’s not a requirement, nor do engineers need their sign‑o

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‑

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 role combines advanced engineering with genuine technical authority, shaping how simulat

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

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.

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. Elasticsearch develops and distributes encryption software and technology that is subject to U.

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

You’ll provide hands‑on technical leadership, working closely with senior stakeholders, mentoring engineers across multiple teams, and line managing a small group of engineers while helping shape our approach to software delivery, architecture, and engineering culture. We’re looking for a Prin

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.

At least 7+ years of experience in software engineering. Lead small delivery teams and oversee the line management and performance of engineering staff. Extensive experience with a variety of software modelling and simulation techniques.

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.

Principal Software Engineer / Tech Lead. We're hiring a Principal Software Engineer/Tech Lead to help shape the future of our most ambitious client projects. You have a deep passion for software engineering, meticulous attention to detail and a commitment to delivering solutions that drive tangible

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

A leading tech firm based in London seeks a Principal Software Engineer to drive the development of scalable applications.

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, empowerment, impact and mentorship. We are looking for a Principal Engineer to serve as the tech

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.

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.

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

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 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.

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

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

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

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.