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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.

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 mana

As a Principal Software Engineer, you will play a major role in leading and developing software engineering in the Software Modelling and Simulation, autonomy and geospatial fields, along with providing key advice around innovation and new techniques to stakeholders. We are looking for principal sof

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 simulation-

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 credibility throug

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

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

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 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.

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.

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

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

I am looking for a Principal Software Engineer to join a leading AI cybersecurity startup who recently secured an additional $20 million in Series A funding. This Principal Software Engineer role will pay up to £115,000 (DOE) along with benefits, including career development opportunities, home off

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

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

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.

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 in static analysis. Principal Software Engineer,

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

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

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 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

A specialist cloud consultancy in London seeks a Principal Software Engineer to lead software delivery engagements. Responsibilities include leading design and delivery of scalable systems, mentoring engineers, and collaborating with teams to drive technological improvements. This hybrid role requir

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

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

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

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. We believe that the best way to do that is to empower individual engineers, code review every change, decide big things by consensus, and strive for incremental improvements.

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

As a Principal Software Engineer, your world is being embedded or supporting the teams where the hardest work is happening at any given time, helping them deliver good quality software with predictable velocity, helping them break through when they’re getting blocked, helping them get better over

We’re looking for a Principal Software Engineer to join our digital product delivery function. The Principal Software Engineer is a senior technical leader with deep expertise in building and operating digital products, particularly within complex client environments and multi-team projects. As a

We are looking for an experienced Senior C/C++ modeling Engineer to join our hardware team. In this role, you will collaborate with SOC architects, design, and verification engineers to implement and model the design functionality of custom blocks. BS in Engineering or a related discipline or equiva

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

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.

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

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

We are currently looking for a Principal Software Engineer. Principal Software Engineer - REMOTE. If you possess deep consulting acumen and a passion for developing high-quality software, this opportunity is for you.

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

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.

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,

Principal Software Engineer | London | £120k to £160k + benefits | Python. Backend engineers who enjoy complexity and responsibility and have at least 5 years+ experience. Engineers who think in systems, not just features.

You will have the opportunity to shape the direction of our projects while mentoring junior engineers and preparing for a future lead position. Strong background in software design patterns and architectural principles.

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

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 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.

Platform - Principal Software Engineer (Billing Team). Proven record of mentoring engineers, setting technical direction, and elevating engineering quality standards. Elasticsearch develops and distributes encryption software and technology that is subject to U.

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