26 to 50 of 106 Principal Software Engineer Jobs in the UK

Job Description - Principal Software Engineer (16102) Description easyJet holidays is the UK's fastest-growing tour operator, launched in 2019 and already making significant strides in the travel industry. We combine easyJet's vast flight network with over 5000 handpicked hotels and state-of-the-art technology to deliver unbeatable holiday packages across more than 100 destinations … Sunday Times Best Places to Work and Best Workplace in Travel. The Development team at easyJet Holidays is at the heart of our mission, enhancing our website and proprietary software to keep us ahead in a competitive market. We are a close-knit group that thrives under pressure and drives the company's technological advancements. We are looking for … a Principal Software Engineer to lead complex projects and innovate our architectural practices. This role involves steering the technical direction, mentoring junior engineers, and enhancing our software development lifecycle to maintain our edge as a leader in the travel industry. What you'll be doing Lead the design and implementation of scalable software solutions and More ❯

Principal Software Engineer (Corp Functions) page is loaded Principal Software Engineer (Corp Functions) Apply locations Belfast time type Full time posted on Posted Yesterday job requisition id R4066 Role Responsibilities Mentor other engineers in the team, whilst ensuring alignment with project goals and timelines across the team. Design, develop, and maintain software, ensuring … through automated testing, particularly unit testing, and maintain a strong emphasis on code quality and complexity. Oversee the implementation and management of CI/CD pipelines to streamline the software development lifecycle. Monitor system performance, identify issues, and implement solutions to ensure high availability and performance. Ensure security best practices are followed and implement necessary measures to protect cloud … ceremonies and contribute to an agile mindset within the team. Maintain detailed documentation of code, processes, and system configurations. Experience/Competences Essential Proven experience as a Senior .Net Engineer, preferably in the finance sector. Strong understanding of AWS services and hands-on experience with Infrastructure as Code (IaC), particularly using AWS CDK in Python. Experience with Entity Framework More ❯

Overview As a Principal Software Engineer , you will work in one of our core platform teams, playing a key role in developing software that makes a real impact on people's lives, whether it's developing Covid Tests and vaccines, helping scientists detect cancer, ensuring food safety, or developing biodegradable plastics - our work delivers benefit! Responsibilities … and all applicable procedures. Contribute to the development and maintenance of all aspects of the applications and services owned by the team. Qualifications What will make you a successful Principal Software Engineer at Waters: Extensive knowledge and proven experience as a software developer, with exposure to back-end technology stacks (C#, .NET). Experience with Front … End JavaScript Frameworks, especially Angular. Good experience working with Amazon Web Services, Microservices, API development. Knowledge and application of software engineering practices (e.g., Unit testing, TDD, CI/CD, SOLID, BDD). Proven ability to work as part of a team. Ability to analyze and solve problems. Excellent communication and teamwork skills. The following criteria are desirable but not More ❯

with our customers. We are not only passionate about achieving the right outcome and making quality decisions but are dedicated to our collaborative culture. About the role. As a Principal Software Engineer, you will be responsible for designing, building and running front-end and/or back-end software solutions in an agile delivery squad. This … hands-on, you'll be actively involved in designing, implementing and running the products and services that your squad are responsible for. You'll help shape best practices in software engineering, then both work to and coach other Squad members into driving and ensuring high quality solutions. Our Principal Software Engineers will work as Tech Leads within … autonomous product teams delivering products that are part of the rebuild and in squads aligned to our other key business goals. Our Principal Software Engineers will take responsibility for the technical delivery of great software and they will lead the technical direction for the team. The ability to coach and mentor team members is essential to this More ❯

Staff/Principal Software Engineer Hybrid - Cambridge HQ UK Remote-Friendly Circa £110k+ A leading provider of global payment and data solutions is looking for a Staff or Principal Software Engineer to join their high-performing engineering team. This is a unique opportunity to take a senior role in shaping the architecture and technical More ❯

Principal Software Engineer Location: Manchester (Central) or Leeds (South) (Hybrid Up to 2 days in office) Salary: Up to £95,000 base + Car Allowance + Exceptional Bonus Scheme - Up to 30% Architect the Future of Cloud-Native SaaS at Enterprise Scale We are exclusively partnered with our client , a world-class, global SaaS enterprise, undergoing one … of the most ambitious digital transformations in the industry. As part of their UK & European technology organisation, Were looking for a Principal Software Engineer whos ready to take the next step into architecture. This is a rare opportunity to slowly transition into a Solution Architect role and play a key part in shaping next-generation platforms that … orchestration Microservices, RESTful APIs Event-driven architectures SQL and NoSQL technologies CI/CD, Infrastructure as Code Scalable, cloud-native, distributed systems What Were Looking For A background in software engineering with a deep understanding of scalable system architecture. Hands-on experience designing and delivering cloud-native platforms in complex, fast-moving environments. Strong knowledge of modern development practices More ❯

Principal Software Engineer - Product team Remote/Home Based, UK Aker Systems was founded in 2017 by a team of experienced technology professionals who recognised an opportunity to provide highly secure enterprise data platforms to large organisations. We build and operate ground-breaking, ultra-secure, high performance, cloud-based data infrastructure for the enterprise. Our proprietary technology … different backgrounds and identities to apply. We are committed to maintaining an inclusive, and supportive place for you to do your very best work. We're looking for a Principal Software Engineer to lead the architecture, design, and evolution of our secure, distributed, cloud-native systems. This is a hands-on leadership role where you'll shape More ❯

Principal Embedded Software Engineer £70-90k Reading Remote, with occasional visits My client is an elite company providing media content solutions. Due to sustained success, they are expanding their R&D team. They're seeking a Principal Software Engineer with a strong background in embedded systems and a passion for solving complex technical … challenges in a high-performance environment. Key Responsibilities: Lead software architecture across the full stack, from UI and services to kernel-level development. Collaborate with hardware and FPGA teams to deliver tightly integrated, high-speed embedded systems. Mentor engineers, drive best practices, and contribute to recruitment and technical leadership. Essential Experience: 10+ years in C++ software development in … a Linux environment Experience building complex software for custom hardware, including device interfacing. Strong foundation in data structures, algorithms, and object-oriented design. Desirable Skills: Exposure to Qt, Yocto, Linux kernel, or device driver development. Knowledge of high-speed data, graphics processing, or networking (TCP/IP, multicast). Familiarity with Python, GitLab, or AWS What you'll get More ❯

Principal Embedded Software Engineer | £70-90k | Reading | Remote, with occasional visits My client is an elite company providing media content solutions. Due to sustained success, they are expanding their R&D team. They're seeking a Principal Software Engineer with a strong background in embedded systems and a passion for solving complex technical … challenges in a high-performance environment. Key Responsibilities: Lead software architecture across the full stack, from UI and services to kernel-level development. Collaborate with hardware and FPGA teams to deliver tightly integrated, high-speed embedded systems. Mentor engineers, drive best practices, and contribute to recruitment and technical leadership. Essential Experience: 10+ years in C++ software development in … a Linux environment Experience building complex software for custom hardware, including device interfacing. Strong foundation in data structures, algorithms, and object-oriented design. Desirable Skills: Exposure to Qt, Yocto, Linux kernel, or device driver development. Knowledge of high-speed data, graphics processing, or networking (TCP/IP, multicast). Familiarity with Python, GitLab, or AWS What you'll get More ❯

Great opportunity for a Principal Software Engineer with experience of .NET and AWS to join a fast-growing FinTech company in Manchester that have an award-winning culture built on collaboration. You’d join a large engineering department and would work with cross functional teams responsible for building high-performance, cloud-native systems in a DevOps environment. … As a Principal Software Engineer, you’ll lead by example, writing production-grade code while shaping architecture, mentoring engineers, and driving technical excellence across teams. What You’ll Be Doing: Designing and building scalable, distributed systems (60% hands-on coding) Leading technical strategy across multiple product teams Coaching and mentoring Staff & Senior Software Engineers Owning non More ❯

Great opportunity for a Principal Software Engineer with experience of .NET and AWS to join a fast-growing FinTech company in Manchester that have an award-winning culture built on collaboration. You'd join a large engineering department and would work with cross functional teams responsible for building high-performance, cloud-native systems in a DevOps environment. … As a Principal Software Engineer, you'll lead by example, writing production-grade code while shaping architecture, mentoring engineers, and driving technical excellence across teams. What You'll Be Doing: Designing and building scalable, distributed systems (60% hands-on coding) Leading technical strategy across multiple product teams Coaching and mentoring Staff & Senior Software Engineers Owning non More ❯

Principal/Senior Principal Software Engineer - Email Security The driving force behind our award-winning Email Security Product at Mimecast Dive into the forefront of innovation with our Email Security engineering team. Our pioneering Email Security solution pushes on the boundaries of what's possible, leveraging the latest technologies and tooling in AWS. Why Join Our … with our innovative Email Security team! Our MTA process billions of emails from millions of users on thousands of servers each day!" - Hiring Manager What You'll Do? As Principal/Senior Principal Engineer, you will play a pivotal role in leading the development of our next-generation cloud-based email product. This role involves hands-on … within the team, fostering collaboration and teamwork. Apply technology trends and industry innovations to our products. Coach and mentor team members in areas of expertise. Experience 10+ years of software development experience. Strong object-oriented programming skills following SOLID principles. Proficient in Java and experienced in building REST/HTTP microservices. Familiarity with Jenkins CI/CD pipelines and More ❯

We are a technology-driven company building high-performing, scalable, and resilient software solutions. Our teams work with a modern tech stack including .NET, MongoDB, AWS, Jenkins, SQL Server, and streaming technologies. We’re looking for a hands-on Principal Engineer who can code, design scalable systems, manage Staff Engineers, and drive technical excellence across multiple teams. … This role is perfect for a technical leader who still enjoys writing code while shaping architecture and mentoring engineers. About the role As a Principal Engineer, you will play a critical role in: Architecting scalable, high-performance systems Coding and reviewing mission-critical features (at-least 60% hands-on) Managing and mentoring Staff Engineers & Senior Developers Driving best … practices in software development and AI-powered engineering Owning non-functional requirements (NFRs) such as security, scalability, and reliability Optimising cloud infrastructure and CI/CD pipelines If you thrive on solving complex technical challenges, leading by example, and empowering teams, this is the role for you! Key responsibilities Hands-on coding (at least 60% of the time), working More ❯

Principal Software Engineer -C#/.Net,React Introduction: Are you searching for an opportunity to play a key role in driving the dramatic growth of a highly successful software company? At Poppulo, we're working on what's next in communications and workplace technology. As a pioneer in this industry, we understand that meaningfully reaching every … the requirements. We believe in fostering an environment where there is a diversity of perspectives, in hopes that we can all thrive. The Opportunity We are seeking a skilled Principal Software Development Engineer to join our Extensions & Adapters team within Data Integrations. In this role, you'll build and enhance plugins that expand the functionality of our … adapters and integration components (Listeners, Actions, Endpoints). Identify and implement performance improvements and optimization strategies for high data throughput. Mentor team members, ensuring adherence to best practices in software development and architecture. Participate actively in agile processes and foster a collaborative and innovative team culture. Integrate and experiment with AI technologies, leveraging generative AI and Large Language Models More ❯

Job Title: Principal Software Engineer - x8 Location: Isle of Wight - Cowes/Portsmouth - Broad Oak - We offer flexible working arrangements - Part time & accruing hours available. Please let us know if you would like to discuss these options Salary: Up to £75,900 (dependent on skills and experience) What you'll be doing: Derive and maintain a set … of software requirements from a baseline set of systems requirements Produce and maintain a software design to meet a set of software requirements Use a software design to produce a deliverable software solution Undertake peer reviews or checking/verification of peers' solutions across Maritime Services Undertake technical reviews, verify and authorise software engineering … designs Act as an Engineering technical lead for a software solution at a sub-system level Maintain a software solution to address reported defects and/or add new functionality Support the development of individuals and teams to enhance skills and competencies Produce or assist in the creation of software estimates for sub-systems Your skills and More ❯

Job Title: Principal Software Engineer - x8 Location: Isle of Wight - Cowes/Portsmouth - Broad Oak - We offer flexible working arrangements - Part time & accruing hours available. Please let us know if you would like to discuss these options Salary: Up to £75,900 (dependent on skills and experience) What you'll be doing: Derive and maintain a set … of software requirements from a baseline set of systems requirements Produce and maintain a software design to meet a set of software requirements Use a software design to produce a deliverable software solution Undertake peer reviews or checking/verification of peers' solutions across Maritime Services Undertake technical reviews, verify and authorise software engineering … designs Act as an Engineering technical lead for a software solution at a sub-system level Maintain a software solution to address reported defects and/or add new functionality Support the development of individuals and teams to enhance skills and competencies Produce or assist in the creation of software estimates for sub-systems Your skills and More ❯

Job Title: Principal Software Engineer - x8 Location: Isle of Wight - Cowes/Portsmouth - Broad Oak - We offer flexible working arrangements - Part time & accruing hours available. Please let us know if you would like to discuss these options Salary: Up to £75,900 (dependent on skills and experience) What you'll be doing: Derive and maintain a set … of software requirements from a baseline set of systems requirements Produce and maintain a software design to meet a set of software requirements Use a software design to produce a deliverable software solution Undertake peer reviews or checking/verification of peers' solutions across Maritime Services Undertake technical reviews, verify and authorise software engineering … designs Act as an Engineering technical lead for a software solution at a sub-system level Maintain a software solution to address reported defects and/or add new functionality Support the development of individuals and teams to enhance skills and competencies Produce or assist in the creation of software estimates for sub-systems Your skills and More ❯

Job Title: Principal Software Engineer - x8 Location: Isle of Wight - Cowes/Portsmouth - Broad Oak - We offer flexible working arrangements - Part time & accruing hours available. Please let us know if you would like to discuss these options Salary: Up to £75,900 (dependent on skills and experience) What you'll be doing: Derive and maintain a set … of software requirements from a baseline set of systems requirements Produce and maintain a software design to meet a set of software requirements Use a software design to produce a deliverable software solution Undertake peer reviews or checking/verification of peers' solutions across Maritime Services Undertake technical reviews, verify and authorise software engineering … designs Act as an Engineering technical lead for a software solution at a sub-system level Maintain a software solution to address reported defects and/or add new functionality Support the development of individuals and teams to enhance skills and competencies Produce or assist in the creation of software estimates for sub-systems Your skills and More ❯

Job Title: Principal Software Engineer - x8 Location: Isle of Wight - Cowes/Portsmouth - Broad Oak - We offer flexible working arrangements - Part time & accruing hours available. Please let us know if you would like to discuss these options Salary: Up to £75,900 (dependent on skills and experience) What you'll be doing: Derive and maintain a set … of software requirements from a baseline set of systems requirements Produce and maintain a software design to meet a set of software requirements Use a software design to produce a deliverable software solution Undertake peer reviews or checking/verification of peers' solutions across Maritime Services Undertake technical reviews, verify and authorise software engineering … designs Act as an Engineering technical lead for a software solution at a sub-system level Maintain a software solution to address reported defects and/or add new functionality Support the development of individuals and teams to enhance skills and competencies Produce or assist in the creation of software estimates for sub-systems Your skills and More ❯

Job Title: Principal Software Engineer - x8 Location: Isle of Wight - Cowes/Portsmouth - Broad Oak - We offer flexible working arrangements - Part time & accruing hours available. Please let us know if you would like to discuss these options Salary: Up to £75,900 (dependent on skills and experience) What you'll be doing: Derive and maintain a set … of software requirements from a baseline set of systems requirements Produce and maintain a software design to meet a set of software requirements Use a software design to produce a deliverable software solution Undertake peer reviews or checking/verification of peers' solutions across Maritime Services Undertake technical reviews, verify and authorise software engineering … designs Act as an Engineering technical lead for a software solution at a sub-system level Maintain a software solution to address reported defects and/or add new functionality Support the development of individuals and teams to enhance skills and competencies Produce or assist in the creation of software estimates for sub-systems Your skills and More ❯

Job Title: Principal Software Engineer - x8 Location: Isle of Wight - Cowes/Portsmouth - Broad Oak - We offer flexible working arrangements - Part time & accruing hours available. Please let us know if you would like to discuss these options Salary: Up to £75,900 (dependent on skills and experience) What you'll be doing: Derive and maintain a set … of software requirements from a baseline set of systems requirements Produce and maintain a software design to meet a set of software requirements Use a software design to produce a deliverable software solution Undertake peer reviews or checking/verification of peers' solutions across Maritime Services Undertake technical reviews, verify and authorise software engineering … designs Act as an Engineering technical lead for a software solution at a sub-system level Maintain a software solution to address reported defects and/or add new functionality Support the development of individuals and teams to enhance skills and competencies Produce or assist in the creation of software estimates for sub-systems Your skills and More ❯

Job Title: Principal Software Engineer - x8 Location: Isle of Wight - Cowes/Portsmouth - Broad Oak - We offer flexible working arrangements - Part time & accruing hours available. Please let us know if you would like to discuss these options Salary: Up to £75,900 (dependent on skills and experience) What you'll be doing: Derive and maintain a set … of software requirements from a baseline set of systems requirements Produce and maintain a software design to meet a set of software requirements Use a software design to produce a deliverable software solution Undertake peer reviews or checking/verification of peers' solutions across Maritime Services Undertake technical reviews, verify and authorise software engineering … designs Act as an Engineering technical lead for a software solution at a sub-system level Maintain a software solution to address reported defects and/or add new functionality Support the development of individuals and teams to enhance skills and competencies Produce or assist in the creation of software estimates for sub-systems Your skills and More ❯

Job Title: Principal Software Engineer - x8 Location: Isle of Wight - Cowes/Portsmouth - Broad Oak - We offer flexible working arrangements - Part time & accruing hours available. Please let us know if you would like to discuss these options Salary: Up to £75,900 (dependent on skills and experience) What you'll be doing: Derive and maintain a set … of software requirements from a baseline set of systems requirements Produce and maintain a software design to meet a set of software requirements Use a software design to produce a deliverable software solution Undertake peer reviews or checking/verification of peers' solutions across Maritime Services Undertake technical reviews, verify and authorise software engineering … designs Act as an Engineering technical lead for a software solution at a sub-system level Maintain a software solution to address reported defects and/or add new functionality Support the development of individuals and teams to enhance skills and competencies Produce or assist in the creation of software estimates for sub-systems Your skills and More ❯

Job Title: Principal Software Engineer - x8 Location: Isle of Wight - Cowes/Portsmouth - Broad Oak - We offer flexible working arrangements - Part time & accruing hours available. Please let us know if you would like to discuss these options Salary: Up to £75,900 (dependent on skills and experience) What you'll be doing: Derive and maintain a set … of software requirements from a baseline set of systems requirements Produce and maintain a software design to meet a set of software requirements Use a software design to produce a deliverable software solution Undertake peer reviews or checking/verification of peers' solutions across Maritime Services Undertake technical reviews, verify and authorise software engineering … designs Act as an Engineering technical lead for a software solution at a sub-system level Maintain a software solution to address reported defects and/or add new functionality Support the development of individuals and teams to enhance skills and competencies Produce or assist in the creation of software estimates for sub-systems Your skills and More ❯

Job Title: Principal Software Engineer - x8 Location: Isle of Wight - Cowes/Portsmouth - Broad Oak - We offer flexible working arrangements - Part time & accruing hours available. Please let us know if you would like to discuss these options Salary: Up to £75,900 (dependent on skills and experience) What you'll be doing: Derive and maintain a set … of software requirements from a baseline set of systems requirements Produce and maintain a software design to meet a set of software requirements Use a software design to produce a deliverable software solution Undertake peer reviews or checking/verification of peers' solutions across Maritime Services Undertake technical reviews, verify and authorise software engineering … designs Act as an Engineering technical lead for a software solution at a sub-system level Maintain a software solution to address reported defects and/or add new functionality Support the development of individuals and teams to enhance skills and competencies Produce or assist in the creation of software estimates for sub-systems Your skills and More ❯