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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.

The Principal Software Engineer will work closely with a talented team of Software Engineers across Web, Cloud and Mobile products. Principal Software Engineer requirements: • Strong background in computer science fundamentals, with hands-on experience designing and delivering production-quali

Bristol – Principal Embedded Software Engineer - £80k + great benefits! My client is a leading engineering firm, developing software and hardware for a range of regulated industries. They are looking for a Principal Embedded Software Engineer to join their highly motivated team. You wil

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

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.

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 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.

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.

Extensive experience in software engineering, with a focus on large‑scale, complex systems. Knowledge of AI, machine learning, or other emerging technologies relevant to software engineering. Lead the design and development of advanced software solutions, ensuring high standards of quality, securi

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

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

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

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

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. 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

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

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 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.

Elasticsearch - Principal Software Engineer II - Distributed Systems. Principal Software Engineer II. Elasticsearch develops and distributes encryption software and technology that is subject to U.

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.

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

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.

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.

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

We are looking for a Principal Software Engineer who will play a defining role in shaping our platform, our teams, and our technical future. Prior CTO (at a startup), Principal Engineer, or equivalent senior technical leadership experience is a strong plus. We design and operate a software platform

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

Member of Technical Staff - Principal Software Engineer. Discipline: Software Engineering. Build the hiring pipelines, onboarding frameworks, or software development best practices as needed to scale an engineering team around you.

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

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

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

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

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

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.

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.

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 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

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.

The next stage of their evolution is to build their IaaS products/services, so they are looking to hire a Principal Cloud Software Engineer to provide the expertise to help them achieve their goals. Work within the Software Engineering Team to define & build a solution enabling customers to use cryp

As a Lead / Principal Software Engineer, you will:. Establish and mentor permanent engineering teams within agencies, transferring technical expertise and engineering best practices. Champion engineering excellence by influencing the adoption and continuous improvement of engineering standards and b

Technical Lead - Principal Software Engineer. We are looking for a highly motivated individual to become a Software Engineering Technical team lead within our Project Delivery Model team. Degree in computer science or software engineering, with at least 8 years of relevant work experience, including