opportunities for all. We benefit from diversity. That said, we're far from perfect - we want to be more diverse and representative. Join us and help make that happen. PrincipalSoftwareEngineer - £Excellent London PrincipalSoftwareEngineerPrincipalSoftwareEngineer The role We're looking for a PrincipalSoftwareEngineer to join our digital product delivery function. Red Badger delivers high quality digital products using a lean delivery process and multidisciplinary, cross-functional teams. The PrincipalSoftwareEngineer is a senior technical leader with deep expertise in building and operating digital products, particularly within complex client environments and multi-team projects. This role is … direction of client engagements and plays a key part in delivering high-quality outcomes through strategic influence, hands-on support, and deep domain knowledge. You will collaborate closely with Principal Product and Delivery roles, as well as Technical and Delivery Leads, to ensure that technology choices align with both client goals and Red Badger's value propositions. You will More ❯
PrincipalSoftwareEngineer page is loaded PrincipalSoftwareEngineer Apply locations: London Type: Full time Posted on: Posted Yesterday Job requisition id: R98993 About our Team : Elsevier is a global information analytics company that helps institutions and professionals progress science, advance healthcare, and improve performance for the benefit of humanity. We serve the research … and innovative technologies. We support our corporate customers, R&D professionals, engineers, scientists, and marketing leaders to innovate and commercialize ideas, products, and processes. About the Role: As a PrincipalSoftwareEngineer, you will participate in technical discussions to design solutions that meet product requirements, develop test-driven code, pair with team members, mentor juniors, and support More ❯
PrincipalSoftwareEngineer - Lead the Future of UK GovTech Innovation ?? Up to £100,000 + Premium Benefits Package ?? Remote-First | Just 1 Day Onsite Every 2 Weeks ?? SC Clearable | British Citizens Only ?? Where Technology Meets Purpose Are you ready to lead engineering efforts that directly impact national security, public services, and digital transformation across the UK? This … is more than just a job-it's a chance to build technology that matters , in a space where innovation meets mission-critical delivery. We're looking for a PrincipalSoftwareEngineer to join a high-performing team at the forefront of UK GovTech. You'll architect secure, scalable platforms, mentor elite engineers, and shape technical strategy … across programmes that serve millions of citizens and protect national interests. ?? Your Mission As a PrincipalEngineer, you'll be a technical leader, strategic thinker, and hands-on problem solver. You'll work closely with delivery teams, stakeholders, and government partners to ensure solutions are robust, secure, and future-proof. What You'll Be Doing: ?? Architect cloud-native More ❯
London, South East, England, United Kingdom Hybrid / WFH Options
Computer Futures
PrincipalSoftwareEngineer - Lead the Future of UK GovTech Innovation Up to £100,000 + Premium Benefits Package Remote-First | Just 1 Day Onsite Every 2 Weeks SC Clearable | British Citizens Only Where Technology Meets Purpose Are you ready to lead engineering efforts that directly impact national security, public services, and digital transformation across the UK? This … is more than just a job-it's a chance to build technology that matters , in a space where innovation meets mission-critical delivery. We're looking for a PrincipalSoftwareEngineer to join a high-performing team at the forefront of UK GovTech. You'll architect secure, scalable platforms, mentor elite engineers, and shape technical strategy … across programmes that serve millions of citizens and protect national interests. Your Mission As a PrincipalEngineer, you'll be a technical leader, strategic thinker, and hands-on problem solver. You'll work closely with delivery teams, stakeholders, and government partners to ensure solutions are robust, secure, and future-proof. What You'll Be Doing: Architect cloud-native More ❯
PrincipalSoftwareEngineer (Golang | Distributed Systems) London – On-site Up to £170,000 base + 25% bonus + excellent benefits Permanent I’m partnered with a high-growth technology company building a world-class data and services platform that processes tens of billions of monthly requests — powering real-time insights for millions of users globally. They’re … hiring a PrincipalSoftwareEngineer (Golang) to join their London engineering team as a hands-on technical leader — driving architectural direction, mentoring engineers, and solving complex distributed systems challenges at scale. The Opportunity Architect and scale high-throughput, event-driven systems built in Go Lead the evolution of real-time APIs and data platforms handling billions of … across all services Mentor senior engineers and play a key role in shaping engineering culture What They’re Looking For 8+ years’ backend engineering experience, ideally at Staff/Principal/Tech Lead level Expert-level proficiency with Golang in production Proven track record designing distributed systems and event-driven architectures (Kafka, RabbitMQ, WebSockets) Deep understanding of PostgreSQL , Redis More ❯
PrincipalSoftwareEngineer (Golang | Distributed Systems) London – On-site Up to £170,000 base + 25% bonus + excellent benefits Permanent I’m partnered with a high-growth technology company building a world-class data and services platform that processes tens of billions of monthly requests — powering real-time insights for millions of users globally. They’re … hiring a PrincipalSoftwareEngineer (Golang) to join their London engineering team as a hands-on technical leader — driving architectural direction, mentoring engineers, and solving complex distributed systems challenges at scale. The Opportunity Architect and scale high-throughput, event-driven systems built in Go Lead the evolution of real-time APIs and data platforms handling billions of … across all services Mentor senior engineers and play a key role in shaping engineering culture What They’re Looking For 8+ years’ backend engineering experience, ideally at Staff/Principal/Tech Lead level Expert-level proficiency with Golang in production Proven track record designing distributed systems and event-driven architectures (Kafka, RabbitMQ, WebSockets) Deep understanding of PostgreSQL , Redis More ❯
PrincipalSoftwareEngineer (Golang | Distributed Systems) London – On-site Up to £170,000 base + 25% bonus + excellent benefits Permanent I’m partnered with a high-growth technology company building a world-class data and services platform that processes tens of billions of monthly requests — powering real-time insights for millions of users globally. They’re … hiring a PrincipalSoftwareEngineer (Golang) to join their London engineering team as a hands-on technical leader — driving architectural direction, mentoring engineers, and solving complex distributed systems challenges at scale. The Opportunity Architect and scale high-throughput, event-driven systems built in Go Lead the evolution of real-time APIs and data platforms handling billions of … across all services Mentor senior engineers and play a key role in shaping engineering culture What They’re Looking For 8+ years’ backend engineering experience, ideally at Staff/Principal/Tech Lead level Expert-level proficiency with Golang in production Proven track record designing distributed systems and event-driven architectures (Kafka, RabbitMQ, WebSockets) Deep understanding of PostgreSQL , Redis More ❯
london (city of london), south east england, united kingdom
Orbis Group
PrincipalSoftwareEngineer (Golang | Distributed Systems) London – On-site Up to £170,000 base + 25% bonus + excellent benefits Permanent I’m partnered with a high-growth technology company building a world-class data and services platform that processes tens of billions of monthly requests — powering real-time insights for millions of users globally. They’re … hiring a PrincipalSoftwareEngineer (Golang) to join their London engineering team as a hands-on technical leader — driving architectural direction, mentoring engineers, and solving complex distributed systems challenges at scale. The Opportunity Architect and scale high-throughput, event-driven systems built in Go Lead the evolution of real-time APIs and data platforms handling billions of … across all services Mentor senior engineers and play a key role in shaping engineering culture What They’re Looking For 8+ years’ backend engineering experience, ideally at Staff/Principal/Tech Lead level Expert-level proficiency with Golang in production Proven track record designing distributed systems and event-driven architectures (Kafka, RabbitMQ, WebSockets) Deep understanding of PostgreSQL , Redis More ❯
London, South East, England, United Kingdom Hybrid / WFH Options
Computer Futures
PrincipalSoftwareEngineer - Shape the Future of UK GovTech Up to £95,000 + Premium Benefits Remote-First | Just 1 Day Onsite Every 2 Weeks SC Clearable | British Citizens Only Lead Innovation. Drive Transformation. Make an Impact. Ready to take the reins on projects that power national security and digital transformation This is your chance to lead … at the intersection of technology and purpose . As a PrincipalSoftwareEngineer , you'll architect cloud-native platforms , mentor elite engineering teams, and influence technical strategy across mission-critical government programmes . Your work won't just be code-it will shape the future of UK GovTech . Your Role in Action Architect secure, scalable, resilient More ❯
Principal Embedded SoftwareEngineer - AI & Robotics | £60,000-£70,000 | Hybrid (Central London) Are you an experienced Embedded SoftwareEngineer with a passion for cutting-edge technology? Join a fast-growing, well-funded scale-up at the forefront of developing AI And Robotic Unmanned Aircraft Systems. As a Principal Embedded SoftwareEngineer … play a key role in shaping the architecture and implementation of embedded components in a high-impact, mission-driven environment. Key Responsibilities include: Design and develop safety-critical embedded software for real-time applications Collaborate with cross-functional teams to ensure system reliability and performance Contribute to certification and compliance processes aligned with industry safety standards What they're More ❯
About The Role Deadline for applications: 11:59pm on 31st October 2025 Were looking for a PrincipalSoftwareEngineer 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 ❯
SR2 | Socially Responsible Recruitment | Certified B Corporation™
SR2 are currently looking for a PrincipalSoftwareEngineer (Python/React) for a fast-growing start-up company in London. Location: Central London (2-3 days a week onsite). Salary: £100 - 120k. What we are looking for: Key skills: Python, React, TypeScript & AWS. Proven track record in a client-facing technical role, dealing with internal … external stakeholders. Ability to lead on projects and deliver high quality software on time. Experience working at a start-up company or a strong preference for working in a growing, fast paced environment. You must have full right to work in the UK to apply for this role. If interested, please apply with your updated CV and we’ll More ❯
SR2 | Socially Responsible Recruitment | Certified B Corporation™
SR2 are currently looking for a PrincipalSoftwareEngineer (Python/React) for a fast-growing start-up company in London. Location: Central London (2-3 days a week onsite). Salary: £100 - 120k. What we are looking for: Key skills: Python, React, TypeScript & AWS. Proven track record in a client-facing technical role, dealing with internal … external stakeholders. Ability to lead on projects and deliver high quality software on time. Experience working at a start-up company or a strong preference for working in a growing, fast paced environment. You must have full right to work in the UK to apply for this role. If interested, please apply with your updated CV and we’ll More ❯
SR2 | Socially Responsible Recruitment | Certified B Corporation™
SR2 are currently looking for a PrincipalSoftwareEngineer (Python/React) for a fast-growing start-up company in London. Location: Central London (2-3 days a week onsite). Salary: £100 - 120k. What we are looking for: Key skills: Python, React, TypeScript & AWS. Proven track record in a client-facing technical role, dealing with internal … external stakeholders. Ability to lead on projects and deliver high quality software on time. Experience working at a start-up company or a strong preference for working in a growing, fast paced environment. You must have full right to work in the UK to apply for this role. If interested, please apply with your updated CV and we’ll More ❯
london (city of london), south east england, united kingdom
SR2 | Socially Responsible Recruitment | Certified B Corporation™
SR2 are currently looking for a PrincipalSoftwareEngineer (Python/React) for a fast-growing start-up company in London. Location: Central London (2-3 days a week onsite). Salary: £100 - 120k. What we are looking for: Key skills: Python, React, TypeScript & AWS. Proven track record in a client-facing technical role, dealing with internal … external stakeholders. Ability to lead on projects and deliver high quality software on time. Experience working at a start-up company or a strong preference for working in a growing, fast paced environment. You must have full right to work in the UK to apply for this role. If interested, please apply with your updated CV and we’ll More ❯
stage B2B SaaS company that’s building something genuinely transformative in their category. As they enter a critical phase of growth, they’re looking to hire a Senior or Principal Full-Stack SoftwareEngineer to help lay the technical foundations of their platform and influence both the engineering direction and long-term product strategy. This is a … isn’t available. The team is passionate about diversity, inclusion, and building an environment where everyone can thrive and do their best work. If you're a hands on engineer excited by the idea of helping build a product from the ground up and want to join a team that values innovation, ownership, and velocity we would love to More ❯
stage B2B SaaS company that’s building something genuinely transformative in their category. As they enter a critical phase of growth, they’re looking to hire a Senior or Principal Full-Stack SoftwareEngineer to help lay the technical foundations of their platform and influence both the engineering direction and long-term product strategy. This is a … isn’t available. The team is passionate about diversity, inclusion, and building an environment where everyone can thrive and do their best work. If you're a hands on engineer excited by the idea of helping build a product from the ground up and want to join a team that values innovation, ownership, and velocity we would love to More ❯
stage B2B SaaS company that’s building something genuinely transformative in their category. As they enter a critical phase of growth, they’re looking to hire a Senior or Principal Full-Stack SoftwareEngineer to help lay the technical foundations of their platform and influence both the engineering direction and long-term product strategy. This is a … isn’t available. The team is passionate about diversity, inclusion, and building an environment where everyone can thrive and do their best work. If you're a hands on engineer excited by the idea of helping build a product from the ground up and want to join a team that values innovation, ownership, and velocity we would love to More ❯
london (city of london), south east england, united kingdom
Alderson James
stage B2B SaaS company that’s building something genuinely transformative in their category. As they enter a critical phase of growth, they’re looking to hire a Senior or Principal Full-Stack SoftwareEngineer to help lay the technical foundations of their platform and influence both the engineering direction and long-term product strategy. This is a … isn’t available. The team is passionate about diversity, inclusion, and building an environment where everyone can thrive and do their best work. If you're a hands on engineer excited by the idea of helping build a product from the ground up and want to join a team that values innovation, ownership, and velocity we would love to More ❯
