51 to 75 of 99 Principal Software Engineer Jobs in the UK

Role: Principal Software Engineer Location: Berkshire Industry: Intelligence, Defence Job Type: Permanent, Onsite Salary: Competitive + Allowance + Bonus + Benefits Join a cutting edge engineering team developing high-performance embedded and application software for complex systems in the Intelligence/Cyber world. As a Lead Software Engineer, you’ll provide technical leadership across … the full software lifecycle from requirements and architecture through to design, implementation, and test. Key Responsibilities: Lead and contribute to software design, development, and verification for embedded and application systems. Define architectures, review code, and ensure delivery to quality, cost, and schedule. Apply modern engineering practices (CI/CD, DevSecOps, TDD/BDD). Mentor junior engineers and … About You: Degree (or equivalent) in Engineering, Computer Science, or related field. Strong experience in C/C++ and embedded or Linux development. Skilled in object-oriented design and software lifecycle management. Familiar with real-time systems, testing frameworks, and modern development tools. What’s on offer: Competitive salary, bonus & allowance. Strong pension and flexible benefits. Hybrid working and More ❯

Principal .Net Engineer – 50/50 Hands-on About the Company: My client is a global leader in market infrastructure. With a focus on data solutions, and digital transformation, they are a World leader in their market. About the Role: My Client is seeking a Principal Software Engineer with a strong background in .NET Core … help design and build distributed systems and APIs, while mentoring others and promoting best practices in engineering delivery. Responsibilities: Design, build and maintain robust, scalable applications and services Ensure software meets business needs, aligns with technical strategy, and is delivered to a high standard Work closely with architects and product teams to refine requirements and deliver solutions Contribute to More ❯

Principal .Net Engineer – 50/50 Hands-on About the Company: My client is a global leader in market infrastructure. With a focus on data solutions, and digital transformation, they are a World leader in their market. About the Role: My Client is seeking a Principal Software Engineer with a strong background in .NET Core … help design and build distributed systems and APIs, while mentoring others and promoting best practices in engineering delivery. Responsibilities: Design, build and maintain robust, scalable applications and services Ensure software meets business needs, aligns with technical strategy, and is delivered to a high standard Work closely with architects and product teams to refine requirements and deliver solutions Contribute to More ❯

Principal .Net Engineer – 50/50 Hands-on About the Company: My client is a global leader in market infrastructure. With a focus on data solutions, and digital transformation, they are a World leader in their market. About the Role: My Client is seeking a Principal Software Engineer with a strong background in .NET Core … help design and build distributed systems and APIs, while mentoring others and promoting best practices in engineering delivery. Responsibilities: Design, build and maintain robust, scalable applications and services Ensure software meets business needs, aligns with technical strategy, and is delivered to a high standard Work closely with architects and product teams to refine requirements and deliver solutions Contribute to More ❯

About Us: OpenSolar was founded in 2017 by global pioneers in solar software - Andrew Birch and Adam Pryor. OpenSolar exists to accelerate the adoption of solar and renewable energy globally. We provide the world's clean energy professionals with an end-to-end digital design, sales and management software to grow their businesses, free of charge. OpenSolar is … be part of the clean energy movement, creating a lasting impact on the world. All while being part of a passionate, fun, and highly collaborative team. The Role: The Principal Software Engineer (Full Stack) role is a full-time permanent position located in the United Kingdom and is a remote working role. You will have the opportunity … to be part of a global high-performing dynamic software team, doing what you do best. The role is focused on designing and building the best solutions for our users in over 185 countries, whilst maintaining best practices in software development. Your key responsibilities: Design and implement robust, scalable, and secure full-stack solutions using React/Python More ❯

Overview The Principal Software Engineer will be a member of the Spacelabs R&D engineering team working on and leading the development of Spacelabs Patient Monitoring and Connectivity (PMC) products. This position requires a deep understanding of solid design and development practices and the ability to apply those to Spacelabs product development. The person will be responsible … for developing and delivering software that supports the next generation patient monitoring products . They will work with other cross-functional members to provide technical software level expertise, and solutions to engineering problems. A key element of this role includes advocating for and designing products that meet the functional, performance and cybersecurity needs of our customers. A strong … systems approach to product development will be necessary in this role. You will spend your time as a hands-on engineer and a technical leader. Our team plays a key role in building software products and features. You will use a wide range of technologies, programming languages and systems. You will be involved in architecture/design of More ❯

and your impact. Your Career Elevate your career by joining MHR, the pioneering SaaS company leading the charge in the UK. We're on the lookout for a visionary Principal Java Software Engineer to join the PeopleFirst engineering team at MHR. Your Team Youll be part of our dynamic People First engineering team where you'll work … with the most cutting-edge technologies, collaborate with experts, and contribute to the rapid growth of our People First SaaS system. Your Impact As a Principal Java Software Engineer at MHR you're not just writing code. You're architecting the future of software solutions. You'll drive excellence in every aspect, from design through to … of microservices, REST APIs, and cloud platforms Azure Experience with Agile methodologies (SCRUM), test-driven development (TDD), and CI/CD pipelines. Knowledge of clean code principles, SOLID, and software design patterns. Familiarity with containerisation tools (Docker) is a plus. Strong problem-solving skills and a proactive, team-oriented mindset. Benefits to support you personally and professionally Alongside the More ❯

and your impact. Your Career Elevate your career by joining MHR, the pioneering SaaS company leading the charge in the UK. We're on the lookout for a visionary Principal Java Software Engineer to join the PeopleFirst engineering team at MHR. Your Team You’ll be part of our dynamic People First engineering team where you'll … work with the most cutting-edge technologies, collaborate with experts, and contribute to the rapid growth of our People First SaaS system. Your Impact As a Principal Java Software Engineer at MHR you're not just writing code. You're architecting the future of software solutions. You'll drive excellence in every aspect, from design through … of microservices, REST APIs, and cloud platforms Azure Experience with Agile methodologies (SCRUM), test-driven development (TDD), and CI/CD pipelines. Knowledge of clean code principles, SOLID, and software design patterns. Familiarity with containerisation tools (Docker) is a plus. Strong problem-solving skills and a proactive, team-oriented mindset. Benefits to support you personally and professionally Alongside the More ❯

and your impact. Your Career Elevate your career by joining MHR, the pioneering SaaS company leading the charge in the UK. We're on the lookout for a visionary Principal Java Software Engineer to join the PeopleFirst engineering team at MHR. Your Team You’ll be part of our dynamic People First engineering team where you'll … work with the most cutting-edge technologies, collaborate with experts, and contribute to the rapid growth of our People First SaaS system. Your Impact As a Principal Java Software Engineer at MHR you're not just writing code. You're architecting the future of software solutions. You'll drive excellence in every aspect, from design through … of microservices, REST APIs, and cloud platforms Azure Experience with Agile methodologies (SCRUM), test-driven development (TDD), and CI/CD pipelines. Knowledge of clean code principles, SOLID, and software design patterns. Familiarity with containerisation tools (Docker) is a plus. Strong problem-solving skills and a proactive, team-oriented mindset. Benefits to support you personally and professionally Alongside the More ❯

and your impact. Your Career Elevate your career by joining MHR, the pioneering SaaS company leading the charge in the UK. We're on the lookout for a visionary Principal Java Software Engineer to join the PeopleFirst engineering team at MHR. Your Team You’ll be part of our dynamic People First engineering team where you'll … work with the most cutting-edge technologies, collaborate with experts, and contribute to the rapid growth of our People First SaaS system. Your Impact As a Principal Java Software Engineer at MHR you're not just writing code. You're architecting the future of software solutions. You'll drive excellence in every aspect, from design through … of microservices, REST APIs, and cloud platforms Azure Experience with Agile methodologies (SCRUM), test-driven development (TDD), and CI/CD pipelines. Knowledge of clean code principles, SOLID, and software design patterns. Familiarity with containerisation tools (Docker) is a plus. Strong problem-solving skills and a proactive, team-oriented mindset. Benefits to support you personally and professionally Alongside the More ❯

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. This is a very interesting opportunity providing the right candidate the opportunity … Tech Stack/Skills required : -Embedded C -RTOS or MCU experience - Regulated industry experience - Team leadership experience you will be able to mentor and lead a team of embedded software engineers. The competitive salary is between £70-80k + great benefits! If youre interested please apply below More ❯

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. This is a very interesting opportunity providing the right candidate the opportunity More ❯

Principal Software Engineer Join a once in a career opportunity to help build a premium private bank from the ground up. Which is currently in stealth mode , backed by significant capital and led by a visionary team. With mobilisation underway, we’re assembling a lean, elite engineering team to architect and deliver a secure, scalable, multi-cloud … banking platform using modern technologies. This is a career-defining role for a polyglot engineer with deep expertise in Rust and Python , and a passion for building robust systems in highly regulated environments. What You’ll Do Design and build core banking services and infrastructure using Rust , Python , and other modern languages. Develop secure, scalable systems across AWS and More ❯

Principal Software Engineer Join a once in a career opportunity to help build a premium private bank from the ground up. Which is currently in stealth mode , backed by significant capital and led by a visionary team. With mobilisation underway, we’re assembling a lean, elite engineering team to architect and deliver a secure, scalable, multi-cloud … banking platform using modern technologies. This is a career-defining role for a polyglot engineer with deep expertise in Rust and Python , and a passion for building robust systems in highly regulated environments. What You’ll Do Design and build core banking services and infrastructure using Rust , Python , and other modern languages. Develop secure, scalable systems across AWS and More ❯

Are you an experienced Principal Embedded Software Engineer seeking a new challenge in Cambridge? This role offers the chance to elevate your career while working on cutting-edge projects in a dynamic and innovative environment. As a Principal Embedded Software Engineer, you will be at the forefront of technological advancements, directly contributing to the … Leading process improvement initiatives - Implementing and managing CI/CD pipelines - Developing and refining build tools - Profiling and testing embedded systems Essential Skills and Experience: - Proven experience in embedded software engineering - Proficiency in C programming - Strong background in release and configuration management - Demonstrated ability to drive process improvements - Experience with CI/CD practices and tools - Expertise in build More ❯

Are you an experienced Principal Embedded Software Engineer seeking a new challenge in Cambridge? This role offers the chance to elevate your career while working on cutting-edge projects in a dynamic and innovative environment. As a Principal Embedded Software Engineer, you will be at the forefront of technological advancements, directly contributing to the … Leading process improvement initiatives - Implementing and managing CI/CD pipelines - Developing and refining build tools - Profiling and testing embedded systems Essential Skills and Experience: - Proven experience in embedded software engineering - Proficiency in C programming - Strong background in release and configuration management - Demonstrated ability to drive process improvements - Experience with CI/CD practices and tools - Expertise in build More ❯

Are you an experienced Principal Embedded Software Engineer seeking a new challenge in Cambridge? This role offers the chance to elevate your career while working on cutting-edge projects in a dynamic and innovative environment. As a Principal Embedded Software Engineer, you will be at the forefront of technological advancements, directly contributing to the … Leading process improvement initiatives - Implementing and managing CI/CD pipelines - Developing and refining build tools - Profiling and testing embedded systems Essential Skills and Experience: - Proven experience in embedded software engineering - Proficiency in C programming - Strong background in release and configuration management - Demonstrated ability to drive process improvements - Experience with CI/CD practices and tools - Expertise in build More ❯

Our client, a leader in the defence and security sector, is seeking a Principal Software Engineer to join their team in Berkshire. This is a permanent role where you will provide technical leadership within their Cyber Unit. Key Responsibilities: Architect, specify requirements, design, implement, and test embedded and/or application software to ensure high quality … and timely deliverables. Apply object-oriented design techniques for code re-use and integration with testing frameworks. Review system design artefacts to derive software requirements and architecture. Use modelling tools to design, document, review, and maintain the software design. Develop knowledge of best practice development processes and standards. Estimate time and effort for software activities and deliver … according to these estimates. Contribute to the Software Community of Practice to support quality and innovation. Generate and review technical proposals, and mentor less experienced engineers. Job Requirements: Willing and able to obtain and maintain SC and DV security clearance. Qualifications/Skills Required: Degree in engineering, mathematics or science-based subject, or equivalent experience. Significant experience in one More ❯

Our client, a leader in the defence and security sector, is seeking a Principal Software Engineer to join their team in Berkshire. This is a permanent role where you will provide technical leadership within their Cyber Unit. Key Responsibilities: Architect, specify requirements, design, implement, and test embedded and/or application software to ensure high quality … and timely deliverables. Apply object-oriented design techniques for code re-use and integration with testing frameworks. Review system design artefacts to derive software requirements and architecture. Use modelling tools to design, document, review, and maintain the software design. Develop knowledge of best practice development processes and standards. Estimate time and effort for software activities and deliver … according to these estimates. Contribute to the Software Community of Practice to support quality and innovation. Generate and review technical proposals, and mentor less experienced engineers. Job Requirements: Willing and able to obtain and maintain SC and DV security clearance. Qualifications/Skills Required: Degree in engineering, mathematics or science-based subject, or equivalent experience. Significant experience in one More ❯

About The Role Deadline for applications: 11:59pm on 31st October 2025 Were looking for a Principal Software Engineer to shape the technical direction of high-profile projects and lead the delivery of modern, scalable software. We use technology to create impactful, human-centred solutions that make a difference to users and organisations. We believe great engineering … 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. Responsibilities Lead the design and development of advanced software solutions, ensuring high standards of quality, security and scalability. Set the technical direction for … function in strategic discussions, influencing our technology roadmap. Anticipate and manage project risks, helping teams navigate complex technical challenges. About You Professional knowledge and experience Essential Extensive experience in software engineering, with a focus on large-scale, complex systems. Polyglot engineer comfortable working across multiple languages and frameworks (weve used Python, Java, Kotlin, Node.js, C#, JavaScript, Express, React More ❯

Principal Control Software Engineer Hybrid/Onsite to Birmingham About Us At TAE Power Solutions, we design power management systems that use less but do more. From, electric vehicle, drivetrains, ultrafast charging, stationary energy storage and grid efficiencies. We develop a clean energy ecosystem of proprietary technology designed to go faster, perform stronger, travel farther, and last … clean energy to the grid. Job Overview As a member of the Control Systems team, you will be working on the development of BMS, DCDC, OBC and Inverter application software for a range of demonstrator and production projects. You will be involved in all stages of the software development process, guide, and mentor other more junior engineers within … projects, and liaise directly with customers, suppliers, and other engineering teams within TAE Power Solutions (TPS). Key Aspects of the role Provide technical delivery and leadership of application software activities Support and mentor other more junior engineers within the team Creation and management of software requirements Take active part in the architectural design of the software More ❯

Lead Software Engineer IoT & Full-Stack Location: Hybrid/Bicester Type: Permanent Salary: Competitive, market-based TUAL Technology is an innovative, VC-backed start-up based in Bicester, developing PowerUp a high-power EV charging solution designed for grid-constrained sites. By integrating battery storage, smart energy management, and ultra-fast DC charging, TUAL delivers seamless electrification where … traditional grid capacity falls short. Working with enterprise customers across Europe, TUAL is transforming the productivity and profitability of electric commercial vehicle fleets through a portfolio of intelligent, software-defined, cloud and IoT-enabled charging solutions. The Role Were looking for a hands-on Lead Software Engineer to own the design and delivery of our IoT and … cloud software platform. Youll connect our ultra-fast chargers, manage data and remote control functions, and ensure security and scalability across our systems. Youll work directly with the VP Product and VP Power Electronics, shaping architecture, integrations and performance turning ideas into real, working solutions. ________________________________________ What Youll Do Build IoT and cloud software for charger connectivity and monitoring More ❯

Overview Mesh-AI are seeking an exceptional Principal Software Engineer to lead delivery of exciting engagements within our Energy & Commodities Trading sector. This role demands a unique combination of hands-on technical excellence and deep domain expertise in trading environments. You will architect and implement critical solutions that power real-time trading decisions, while mentoring teams and … trading operations across multiple asset classes Architect solutions which are able to integrate market data feeds, position management systems, market fundamentals, P&L Risk and Back Office solutions. Establish software engineering best practices and coding standards for trading applications, upskilling more junior members of our delivery teams Partner with client CTOs, Heads of Data, and Engineering Leads to align More ❯

Job Title : Principal Embedded Software Engineer Location : Bristol City Centre - 3 Days Per Week On-Site Salary - Up to £72,000 + Bonus & Benefits (Depending on Experience) Summary: This is a fantastic opportunity for an experienced engineer with a passion for leadership and a background in safety-critical embedded software to step into a high … impact role, driving both technical delivery and team performance. Responsibilities : Leading, mentoring, and managing a team of embedded software engineers in a collaborative and high-performing environment. Overseeing the full software development lifecycle from requirements and design through to implementation, testing, and maintenance. Collaborating with cross-functional teams, including project management and QA, to ensure seamless and timely … and resolving technical challenges while managing risk and maintaining timelines. Driving continuous improvement, fostering innovation, and supporting professional growth within your team. Required Skills & Experience: Proven experience in embedded software development within a safety-critical environment. Solid understanding of embedded systems and RTOS Strong programming skills in C and assembler. Demonstrated leadership experience with the ability to mentor, motivate More ❯

Job Title : Principal Embedded Software Engineer Location : Bristol City Centre - 3 Days Per Week On-Site Salary - Up to £72,000 + Bonus & Benefits (Depending on Experience) Summary: This is a fantastic opportunity for an experienced engineer with a passion for leadership and a background in safety-critical embedded software to step into a high … impact role, driving both technical delivery and team performance. Responsibilities : Leading, mentoring, and managing a team of embedded software engineers in a collaborative and high-performing environment. Overseeing the full software development lifecycle – from requirements and design through to implementation, testing, and maintenance. Collaborating with cross-functional teams, including project management and QA, to ensure seamless and timely … and resolving technical challenges while managing risk and maintaining timelines. Driving continuous improvement, fostering innovation, and supporting professional growth within your team. Required Skills & Experience: Proven experience in embedded software development within a safety-critical environment. Solid understanding of embedded systems and RTOS Strong programming skills in C and assembler. Demonstrated leadership experience with the ability to mentor, motivate More ❯