1 to 25 of 95 Principal Engineer Jobs in London

Principal Engineer London Hybrid £100,000-£170,000 + bonus + benefits We’re working with a rapidly growing tech for good company that is transforming how data, automation, and smart integrations shape the future of digital infrastructure. Their platform optimises real-time operations, connecting users with seamless, intelligent technology solutions. We are looking for Principal Engineer … their high performance systems. This is an opportunity to work with modern backend architecture, collaborating with top-tier engineers in a fast-moving, product-focused environment. Responsibilities as a Principal Engineer: Contribute to the businesses technology strategy and architecture Contribute to the backend Kotlin infrastructure Ship resilient and well tested production code Collaborate with different teams to deliver … and bonus Hybrid office/remote-working practices Private Health Insurance Pension Scheme Life Assurance Scheme with death in service benefit of 4x salary This is a career defining Principal Engineer position with the potential to have a massive impact on the technology strategy of a business that is directly shaping the future of intelligent digital infrastructure. **Unfortunately More ❯

Principal Engineer London Hybrid £100,000-£170,000 + bonus + benefits We’re working with a rapidly growing tech for good company that is transforming how data, automation, and smart integrations shape the future of digital infrastructure. Their platform optimises real-time operations, connecting users with seamless, intelligent technology solutions. We are looking for Principal Engineer … their high performance systems. This is an opportunity to work with modern backend architecture, collaborating with top-tier engineers in a fast-moving, product-focused environment. Responsibilities as a Principal Engineer: Contribute to the businesses technology strategy and architecture Contribute to the backend Kotlin infrastructure Ship resilient and well tested production code Collaborate with different teams to deliver … and bonus Hybrid office/remote-working practices Private Health Insurance Pension Scheme Life Assurance Scheme with death in service benefit of 4x salary This is a career defining Principal Engineer position with the potential to have a massive impact on the technology strategy of a business that is directly shaping the future of intelligent digital infrastructure. **Unfortunately More ❯

Principal Engineer London Hybrid £100,000-£170,000 + bonus + benefits We’re working with a rapidly growing tech for good company that is transforming how data, automation, and smart integrations shape the future of digital infrastructure. Their platform optimises real-time operations, connecting users with seamless, intelligent technology solutions. We are looking for Principal Engineer … their high performance systems. This is an opportunity to work with modern backend architecture, collaborating with top-tier engineers in a fast-moving, product-focused environment. Responsibilities as a Principal Engineer: Contribute to the businesses technology strategy and architecture Contribute to the backend Kotlin infrastructure Ship resilient and well tested production code Collaborate with different teams to deliver … and bonus Hybrid office/remote-working practices Private Health Insurance Pension Scheme Life Assurance Scheme with death in service benefit of 4x salary This is a career defining Principal Engineer position with the potential to have a massive impact on the technology strategy of a business that is directly shaping the future of intelligent digital infrastructure. **Unfortunately More ❯

Principal Engineer London Hybrid £100,000-£170,000 + bonus + benefits We’re working with a rapidly growing tech for good company that is transforming how data, automation, and smart integrations shape the future of digital infrastructure. Their platform optimises real-time operations, connecting users with seamless, intelligent technology solutions. We are looking for Principal Engineer … their high performance systems. This is an opportunity to work with modern backend architecture, collaborating with top-tier engineers in a fast-moving, product-focused environment. Responsibilities as a Principal Engineer: Contribute to the businesses technology strategy and architecture Contribute to the backend Kotlin infrastructure Ship resilient and well tested production code Collaborate with different teams to deliver … and bonus Hybrid office/remote-working practices Private Health Insurance Pension Scheme Life Assurance Scheme with death in service benefit of 4x salary This is a career defining Principal Engineer position with the potential to have a massive impact on the technology strategy of a business that is directly shaping the future of intelligent digital infrastructure. **Unfortunately More ❯

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. Principal Software Engineer - £Excellent London Principal Software Engineer Principal Software Engineer The role We're looking for a Principal Software Engineer 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 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. This role is instrumental in shaping the technical 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 engage More ❯

Principal Software Engineer - 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 Principal Software Engineer 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 Principal Engineer, 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 platforms using More ❯

Role: Principal Data Engineer (Databricks) Industry: Commodities Location: London (hybrid, 3 days per week) Rate: £800-900/d (inside IR35) Contract: 6 months rolling (multi-year scope) X4 Technology are partnered with a global commodity trading firm in central London to hire a contract Principal Data Engineer (Databricks). You'll take a lead role … in a flagship transformation programme that places Databricks at the centre of how trading data is standardised, governed and used to drive sharper commercial decisions globally. Responsibilities of the Principal Data Engineer (Databricks) Design and architect end-to-end data platforms and modernised data environments Lead the shift toward data-driven thinking across both IT and business stakeholders … and problem management processes Champion best practices, community development (CoE/CoP), and continuous improvement Act as a visible thought leader - delivering technical guidance and mentorship Requirements for the Principal Data Engineer (Databricks) Deep hands-on experience with Databricks, Delta Live Tables (DLT), data modelling, data ingestion & integration Strong proficiency across Data Factory, SQL DB, Synapse, Stream Analytics More ❯

Role: Principal Data Engineer (Databricks) Industry: Commodities Location: London (hybrid, 3 days per week) Rate: £800-900/d (inside IR35) Contract: 6 months rolling (multi-year scope) X4 Technology are partnered with a global commodity trading firm in central London to hire a contract Principal Data Engineer (Databricks). You'll take a lead role … in a flagship transformation programme that places Databricks at the centre of how trading data is standardised, governed and used to drive sharper commercial decisions globally. Responsibilities of the Principal Data Engineer (Databricks) Design and architect end-to-end data platforms and modernised data environments Lead the shift toward data-driven thinking across both IT and business stakeholders … and problem management processes Champion best practices, community development (CoE/CoP), and continuous improvement Act as a visible thought leader - delivering technical guidance and mentorship Requirements for the Principal Data Engineer (Databricks) Deep hands-on experience with Databricks, Delta Live Tables (DLT), data modelling, data ingestion & integration Strong proficiency across Data Factory, SQL DB, Synapse, Stream Analytics More ❯

Role: Principal Data Engineer (Databricks) Industry: Commodities Location: London (hybrid, 3 days per week) Rate: £800-900/d (inside IR35) Contract: 6 months rolling (multi-year scope) X4 Technology are partnered with a global commodity trading firm in central London to hire a contract Principal Data Engineer (Databricks). You'll take a lead role … in a flagship transformation programme that places Databricks at the centre of how trading data is standardised, governed and used to drive sharper commercial decisions globally. Responsibilities of the Principal Data Engineer (Databricks) Design and architect end-to-end data platforms and modernised data environments Lead the shift toward data-driven thinking across both IT and business stakeholders … and problem management processes Champion best practices, community development (CoE/CoP), and continuous improvement Act as a visible thought leader - delivering technical guidance and mentorship Requirements for the Principal Data Engineer (Databricks) Deep hands-on experience with Databricks, Delta Live Tables (DLT), data modelling, data ingestion & integration Strong proficiency across Data Factory, SQL DB, Synapse, Stream Analytics More ❯

Role: Principal Data Engineer (Databricks) Industry: Commodities Location: London (hybrid, 3 days per week) Rate: £800-900/d (inside IR35) Contract: 6 months rolling (multi-year scope) X4 Technology are partnered with a global commodity trading firm in central London to hire a contract Principal Data Engineer (Databricks). You'll take a lead role … in a flagship transformation programme that places Databricks at the centre of how trading data is standardised, governed and used to drive sharper commercial decisions globally. Responsibilities of the Principal Data Engineer (Databricks) Design and architect end-to-end data platforms and modernised data environments Lead the shift toward data-driven thinking across both IT and business stakeholders … and problem management processes Champion best practices, community development (CoE/CoP), and continuous improvement Act as a visible thought leader - delivering technical guidance and mentorship Requirements for the Principal Data Engineer (Databricks) Deep hands-on experience with Databricks, Delta Live Tables (DLT), data modelling, data ingestion & integration Strong proficiency across Data Factory, SQL DB, Synapse, Stream Analytics More ❯

Principal JavaScript Engineer (TypeScript/React/Node.js) £150,000–£170,000 + Equity | Hybrid – 3 days in London We’re helping a VC-backed SaaS scaleup reinvent how organisations manage and approve spend, from software requests to supplier onboarding, and they’re gearing up for serious growth. With enterprise clients already on board and revenue climbing, they … re looking for an outstanding Principal Engineer to drive their platform forward. The company in a nutshell Funding : $25M Series A from top-tier investors Leadership : Founders with a track record of building one of Europe’s best-known B2B scale-ups Growth : Plans to 10× revenue and expand to 200+ enterprise customers within 3 years What’s More ❯

Principal JavaScript Engineer (TypeScript/React/Node.js) £150,000–£170,000 + Equity | Hybrid – 3 days in London We’re helping a VC-backed SaaS scaleup reinvent how organisations manage and approve spend, from software requests to supplier onboarding, and they’re gearing up for serious growth. With enterprise clients already on board and revenue climbing, they … re looking for an outstanding Principal Engineer to drive their platform forward. The company in a nutshell Funding : $25M Series A from top-tier investors Leadership : Founders with a track record of building one of Europe’s best-known B2B scale-ups Growth : Plans to 10× revenue and expand to 200+ enterprise customers within 3 years What’s More ❯

Principal JavaScript Engineer (TypeScript/React/Node.js) £150,000–£170,000 + Equity | Hybrid – 3 days in London We’re helping a VC-backed SaaS scaleup reinvent how organisations manage and approve spend, from software requests to supplier onboarding, and they’re gearing up for serious growth. With enterprise clients already on board and revenue climbing, they … re looking for an outstanding Principal Engineer to drive their platform forward. The company in a nutshell Funding : $25M Series A from top-tier investors Leadership : Founders with a track record of building one of Europe’s best-known B2B scale-ups Growth : Plans to 10× revenue and expand to 200+ enterprise customers within 3 years What’s More ❯

Principal JavaScript Engineer (TypeScript/React/Node.js) £150,000–£170,000 + Equity | Hybrid – 3 days in London We’re helping a VC-backed SaaS scaleup reinvent how organisations manage and approve spend, from software requests to supplier onboarding, and they’re gearing up for serious growth. With enterprise clients already on board and revenue climbing, they … re looking for an outstanding Principal Engineer to drive their platform forward. The company in a nutshell Funding : $25M Series A from top-tier investors Leadership : Founders with a track record of building one of Europe’s best-known B2B scale-ups Growth : Plans to 10× revenue and expand to 200+ enterprise customers within 3 years What’s More ❯

Principal Platform Engineer London/WFH to £150k Are you a technologist with start-up experience and a first class education looking for a new opportunity? You could be joining a small Fintech start-up run by small, successful and proven team of finance technology entrepreneurs, backed by Silicon Valley investors, as they build out the product, currently … in stealth mode. As a Principal Platform Engineer you'll have an impactful role with lots of influence. Initially you'll assess the current tech set up based on GCP, Python, TypeScript, PostgreSQL and Terraform; establish the production environment and extend the platform to enable scalability. You'll collaborate closely with the CTO and Lead Software Engineer … of Technology. Location/WFH: You'll be based in Central London, with flexibility to work from home twice a week. About you: You have experience in a similar Principal Platform Engineer role within start-up/scale-up environments with strong commercial acumen You have achieved a 2.1 or above BSc from a well renowned top world More ❯

Principal Platform Engineer London/WFH to £150k Are you a technologist with start-up experience and a first class education looking for a new opportunity? You could be joining a small Fintech start-up run by small, successful and proven team of finance technology entrepreneurs, backed by Silicon Valley investors, as they build out the product, currently … in stealth mode. As a Principal Platform Engineer you'll have an impactful role with lots of influence. Initially you'll assess the current tech set up based on GCP, Python, TypeScript, PostgreSQL and Terraform; establish the production environment and extend the platform to enable scalability. You'll collaborate closely with the CTO and Lead Software Engineer … of Technology. Location/WFH: You'll be based in Central London, with flexibility to work from home twice a week. About you: You have experience in a similar Principal Platform Engineer role within start-up/scale-up environments with strong commercial acumen You have achieved a 2.1 or above BSc from a well renowned top world More ❯

Principal Software Engineer Location: London - 1x a month Salary: £95,000 - £120,000 + equity + benefits 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. This is an opportunity to shape greenfield projects from the ground … do I need to be successful? Degree in Computer Science or equivalent hands-on experience. 7+ years' experience in backend software development, including several years in a senior or principal-level engineering role. Expertise in Python (or a similar backend language), with proven experience designing distributed systems, APIs, and microservices at scale. Deep understanding of software architecture, cloud infrastructure More ❯

Principal Software Engineer Location: London - 1x a month Salary: £95,000 - £120,000 + equity + benefits 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. This is an opportunity to shape greenfield projects from … do I need to be successful? Degree in Computer Science or equivalent hands-on experience. 7+ years' experience in backend software development, including several years in a senior or principal-level engineering role. Expertise in Python (or a similar backend language), with proven experience designing distributed systems, APIs, and microservices at scale. Deep understanding of software architecture, cloud infrastructure More ❯

Principal Software Engineer Salary: Up to £100k + Bonus Location: Central London - Once a Fortnight Tech Stack: Python/Vue/TypeScript/GCP or AWS Cloud Are you a product-driven Software Engineer who cares about the why behind what you build? Do you thrive on shaping technical direction, driving innovation, and delivering solutions that make … real impact for customers? This is a rare chance to join a London-based AI & Data software company backed by significant investment and global ambition. They’re hiring multiple Principal Software Engineers to play a pivotal role in the evolution of their products. You’ll work hands-on within cross-functional teams, influencing both product and technical direction, while … leveraging modern web technologies, cloud platforms, and strong engineering practices. What they're looking for in a Principal Software Engineer: Proven expertise in Python (Django), TypeScript (Vue.js), serverless cloud platforms, and MongoDB A product-first mindset — curious, proactive, and always looking for ways to improve and innovate Experience working in cross-functional teams, contributing hands-on while guiding More ❯

Principal Software Engineer Salary: Up to £100k + Bonus Location: Central London - Once a Fortnight Tech Stack: Python/Vue/TypeScript/GCP or AWS Cloud Are you a product-driven Software Engineer who cares about the why behind what you build? Do you thrive on shaping technical direction, driving innovation, and delivering solutions that make … real impact for customers? This is a rare chance to join a London-based AI & Data software company backed by significant investment and global ambition. They’re hiring multiple Principal Software Engineers to play a pivotal role in the evolution of their products. You’ll work hands-on within cross-functional teams, influencing both product and technical direction, while … leveraging modern web technologies, cloud platforms, and strong engineering practices. What they're looking for in a Principal Software Engineer: Proven expertise in Python (Django), TypeScript (Vue.js), serverless cloud platforms, and MongoDB A product-first mindset — curious, proactive, and always looking for ways to improve and innovate Experience working in cross-functional teams, contributing hands-on while guiding More ❯

Principal Product Engineer (Frontend) - React, TypeScript Fast-Growing SaaS Startup 3 days a week onsite in Central London Salary paying £100k - £140k + benefits Oliver Bernard have partnered with an early-stage, venture-backed SaaS company building a cutting-edge workflow orchestration platform used by high-performance teams across logistics, fulfilment, and finance. Think: replacing clunky legacy enterprise … work across the stack with a strong emphasis on the frontend building elegant, intuitive UIs for complex workflows — with real ownership from architecture to launch. The Role: As a Principal Frontend Engineer, you’ll be a key contributor responsible for building powerful frontend experiences and thoughtfully designed systems under the hood. You’ll have the opportunity to work … on the backend if needed. Are product-minded, user-focused, and comfortable with ambiguity. Thrive in early-stage environments where you help shape both the product and the company. Principal Product Engineer - React, TypeScript More ❯

Principal Product Engineer (Frontend) - React, TypeScript Fast-Growing SaaS Startup 3 days a week onsite in Central London Salary paying £100k - £140k + benefits Oliver Bernard have partnered with an early-stage, venture-backed SaaS company building a cutting-edge workflow orchestration platform used by high-performance teams across logistics, fulfilment, and finance. Think: replacing clunky legacy enterprise … work across the stack with a strong emphasis on the frontend building elegant, intuitive UIs for complex workflows — with real ownership from architecture to launch. The Role: As a Principal Frontend Engineer, you’ll be a key contributor responsible for building powerful frontend experiences and thoughtfully designed systems under the hood. You’ll have the opportunity to work … on the backend if needed. Are product-minded, user-focused, and comfortable with ambiguity. Thrive in early-stage environments where you help shape both the product and the company. Principal Product Engineer - React, TypeScript More ❯

Senior/Principal Systems Engineer £45,000 - £85,000 + excellent bens Bristol, London, Manchester, Reading (Hybrid) Join us as a Senior/Principal Systems Engineering Consultant in Aerospace, Defence, Security and Technology (ADS&T). You'll lead teams that use Systems Thinking to analyse, assess and develop solutions to their most complex challenges. Underpinned by … a huge variety of projects, ranging from niche consultancy projects to large, high-profile programmes. So, you'll always be able to keep yourself challenged. Your Purpose: Senior/Principal Systems Engineer Provide consultancy to client project and engineering managers. Lead the use of best practice techniques and tools on client and internal projects. Champion a Model Based … to a client. Proactively identify opportunities and contribute to ADS&T growth. Contribute to the development of our people through mentoring and coaching. What can you bring: Senior/Principal Systems Engineer The use of MBSE approaches and tools (e.g. Sparx EA, Cameo). Knowledge of modelling languages and architecture frameworks, e.g., UML/SysML, ArchiMate, TOGAF, MODAF. More ❯

Senior/Principal Systems Engineer £45,000 - £85,000 + excellent bens Bristol, London, Manchester, Reading (Hybrid) Join us as a Senior/Principal Systems Engineering Consultant in Aerospace, Defence, Security and Technology (ADS&T). You'll lead teams that use Systems Thinking to analyse, assess and develop solutions to their most complex challenges. Underpinned by … a huge variety of projects, ranging from niche consultancy projects to large, high-profile programmes. So, you'll always be able to keep yourself challenged. Your Purpose: Senior/Principal Systems Engineer Provide consultancy to client project and engineering managers. Lead the use of best practice techniques and tools on client and internal projects. Champion a Model Based … to a client. Proactively identify opportunities and contribute to ADS&T growth. Contribute to the development of our people through mentoring and coaching. What can you bring: Senior/Principal Systems Engineer The use of MBSE approaches and tools (e.g. Sparx EA, Cameo). Knowledge of modelling languages and architecture frameworks, e.g., UML/SysML, ArchiMate, TOGAF, MODAF. More ❯

We are seeking a Principal Engineer/Engineering Manager to lead one of the core engineering teams within Planning Agent , our AI-powered advertising planning platform used daily by IPG agency teams. You will help shape and grow a product with AI at its core, using agents to power an AI assistant advertising planners throughout their workflow. You More ❯