PrincipalEngineer – Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK £160,000 per annum plus stock options Python | Django | FastAPI | AWS | Rust | Postgres | Event-Driven Architecture | Machine Learning PrincipalEngineer - We're working with a leading fintech scale-up that’s transforming how small businesses access finance. Backed … by a strong track record and an ambitious mission, they’re now looking for a PrincipalEngineer to lead the next phase of innovation within one of their most critical product areas. This is a strategic leadership role offering exceptional autonomy and influence. You’ll head up the evolution of a high-impact platform responsible for generating personalised … credit offers — a core driver of the business’s growth and customer experience. The Opportunity As PrincipalEngineer, you’ll take ownership of the technical strategy and architecture for dynamic, data-driven systems that determine the financial products offered to new customers. This is a unique chance to define the future of adaptive credit systems, driving smarter, faster More ❯
PrincipalEngineer – Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK £160,000 per annum plus stock options Python | Django | FastAPI | AWS | Rust | Postgres | Event-Driven Architecture | Machine Learning PrincipalEngineer - We're working with a leading fintech scale-up that’s transforming how small businesses access finance. Backed … by a strong track record and an ambitious mission, they’re now looking for a PrincipalEngineer to lead the next phase of innovation within one of their most critical product areas. This is a strategic leadership role offering exceptional autonomy and influence. You’ll head up the evolution of a high-impact platform responsible for generating personalised … credit offers — a core driver of the business’s growth and customer experience. The Opportunity As PrincipalEngineer, you’ll take ownership of the technical strategy and architecture for dynamic, data-driven systems that determine the financial products offered to new customers. This is a unique chance to define the future of adaptive credit systems, driving smarter, faster More ❯
PrincipalEngineer – Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK £160,000 per annum plus stock options Python | Django | FastAPI | AWS | Rust | Postgres | Event-Driven Architecture | Machine Learning PrincipalEngineer - We're working with a leading fintech scale-up that’s transforming how small businesses access finance. Backed … by a strong track record and an ambitious mission, they’re now looking for a PrincipalEngineer to lead the next phase of innovation within one of their most critical product areas. This is a strategic leadership role offering exceptional autonomy and influence. You’ll head up the evolution of a high-impact platform responsible for generating personalised … credit offers — a core driver of the business’s growth and customer experience. The Opportunity As PrincipalEngineer, you’ll take ownership of the technical strategy and architecture for dynamic, data-driven systems that determine the financial products offered to new customers. This is a unique chance to define the future of adaptive credit systems, driving smarter, faster More ❯
PrincipalEngineer – Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK £160,000 per annum plus stock options Python | Django | FastAPI | AWS | Rust | Postgres | Event-Driven Architecture | Machine Learning PrincipalEngineer - We're working with a leading fintech scale-up that’s transforming how small businesses access finance. Backed … by a strong track record and an ambitious mission, they’re now looking for a PrincipalEngineer to lead the next phase of innovation within one of their most critical product areas. This is a strategic leadership role offering exceptional autonomy and influence. You’ll head up the evolution of a high-impact platform responsible for generating personalised … credit offers — a core driver of the business’s growth and customer experience. The Opportunity As PrincipalEngineer, you’ll take ownership of the technical strategy and architecture for dynamic, data-driven systems that determine the financial products offered to new customers. This is a unique chance to define the future of adaptive credit systems, driving smarter, faster More ❯
london (city of london), south east england, united kingdom
Burns Sheehan
PrincipalEngineer – Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK £160,000 per annum plus stock options Python | Django | FastAPI | AWS | Rust | Postgres | Event-Driven Architecture | Machine Learning PrincipalEngineer - We're working with a leading fintech scale-up that’s transforming how small businesses access finance. Backed … by a strong track record and an ambitious mission, they’re now looking for a PrincipalEngineer to lead the next phase of innovation within one of their most critical product areas. This is a strategic leadership role offering exceptional autonomy and influence. You’ll head up the evolution of a high-impact platform responsible for generating personalised … credit offers — a core driver of the business’s growth and customer experience. The Opportunity As PrincipalEngineer, you’ll take ownership of the technical strategy and architecture for dynamic, data-driven systems that determine the financial products offered to new customers. This is a unique chance to define the future of adaptive credit systems, driving smarter, faster More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Ozone Talent
PrincipalEngineer 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 PrincipalEngineer … 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 PrincipalEngineer: 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 PrincipalEngineer 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 ❯
PrincipalEngineer 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 PrincipalEngineer … 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 PrincipalEngineer: 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 PrincipalEngineer 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 ❯
london, south east england, united kingdom Hybrid / WFH Options
Ozone Talent
PrincipalEngineer 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 PrincipalEngineer … 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 PrincipalEngineer: 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 PrincipalEngineer 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 ❯
slough, south east england, united kingdom Hybrid / WFH Options
Ozone Talent
PrincipalEngineer 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 PrincipalEngineer … 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 PrincipalEngineer: 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 PrincipalEngineer 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 ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Ozone Talent
PrincipalEngineer 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 PrincipalEngineer … 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 PrincipalEngineer: 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 PrincipalEngineer 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 EngineerPrincipal 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 ❯
Job Description - PrincipalEngineer - Cyber Security () PrincipalEngineer - Cyber Security - Job Title: PrincipalEngineer - Cyber Security Location: Frimley, Bristol, Weymouth, Portsmouth, Coventry. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Up to £61,500 depending on skills and experience More ❯
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. Freelance Principal DevOps Engineer - £day rate (outside IR35) London Principal DevOps Engineer Join a new discovery/greenfield project Project is to build a new payments platform for … of working Experience with multiple programming languages, in web and/or mobile and multiple paradigms (e.g. declarative, functional, object oriented ) Duration 6 months (Likely to extend) Immediate Interviews 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 More ❯
PrincipalEngineer - Product Security (Product Security Analyst) - 6 month contract - Frimley, Surrey - £85.40 ph UMB or £63.21 ph PAYE (Inside IR35) The Umbrella rate quoted above is the Gross Umbrella rate (i.e. the rate we pay to the Umbrella Company inclusive of ALL employment costs). Please note, the rate paid by the Umbrella will be less, as … will a Limited Deemed rate or Agency PAYE rate. Please get in touch to discuss the rates via these different payment vehicles. The Role The PSA PrincipalEngineer will be a focal point for security and information risk matters within the Product Security Engineering (PSyE) team and will be able to apply their deep level of subject matter … such as Training Needs Analysis (TNA), Technical Publications, Cyber Incident Plans and Operating Instructions (list is not exhaustive). What are BAE Systems looking for from you? The PSA PrincipalEngineer will have a good understanding of the applicable regulations, standards, policies and guidance on information risk management, to be able to identify, analyse and evaluate information risks. More ❯
PrincipalEngineer – Electrical or Mechanical – Data Centres and Missions Critical UK-Wide – (London, Manchester, Birmingham, Newcastle, Glasgow, Cardiff and Bristol) We are a specialist recruitment agency partnering with a prestigious UK-based consultancy renowned for delivering large-scale, mission-critical data centre projects across the UK and Europe. As their project portfolio grows, we are seeking an experienced … PrincipalEngineer with strong leadership skills in either Electrical or Mechanical disciplines. This is an exceptional opportunity to lead at a strategic level, shaping the delivery of world-class hyperscale, colocation, and bespoke data centre solutions. We want to hear from Principal-level Electrical or Mechanical Engineers with extensive experience driving multi-disciplinary design teams and complex … sharing within the engineering teams Requirements Degree-qualified in Electrical or Mechanical Engineering (or Building Services) 12+ years’ progressive experience in engineering with at least 5 years in a principal or senior leadership role Proven track record of delivering complex hyperscale, colocation, or mission-critical data centre projects across UK and Europe Deep technical expertise in your core discipline More ❯
PrincipalEngineer Azure & IaC (Terraform, Pulumi) 90,000 95,000 Base Salary. Excellent Company Benefits (including paid technical training). Hybrid or Fully Remote Option Offices in England, Scotland & USA. On-Call Rota 1 week in 3 months. Paid travel to HQ for Product & Engineering meetups (1-2 times per month). Areti are delighted to be partnering … with one of the UKs fastest-growing SaaS businesses in the search for a PrincipalEngineer with Infrastructure-as-Code experience (Terraform, Pulumi) . This award-winning organisation has achieved over 40% growth in 2025 , expanding rapidly across the UK and North America . With a major multi-million-pound technology investment planned for the year ahead, this … is a rare opportunity to play a pivotal leadership role in shaping a modern, greenfield-style environment that underpins their continued success. The Role As a PrincipalEngineer , youll take a hands-on and strategic role within the engineering organisation, driving reliability, scalability, and performance across mission-critical systems. Youll guide and mentor platform, SRE, and DevOps teams More ❯
PrincipalEngineer – Azure & IaC (Terraform, Pulumi) £90,000 – £95,000 Base Salary. Excellent Company Benefits (including paid technical training). Hybrid or Fully Remote Option – Offices in England, Scotland & USA. On-Call Rota – 1 week in 3 months. Paid travel to HQ for Product & Engineering meetups (1-2 times per month). Areti are delighted to be partnering … with one of the UK’s fastest-growing SaaS businesses in the search for a PrincipalEngineer with Infrastructure-as-Code experience (Terraform, Pulumi) . This award-winning organisation has achieved over 40% growth in 2025 , expanding rapidly across the UK and North America . With a major multi-million-pound technology investment planned for the year ahead … this is a rare opportunity to play a pivotal leadership role in shaping a modern, greenfield-style environment that underpins their continued success. The Role As a PrincipalEngineer , you’ll take a hands-on and strategic role within the engineering organisation, driving reliability, scalability, and performance across mission-critical systems. You’ll guide and mentor platform, SRE More ❯
Crawley, England, United Kingdom Hybrid / WFH Options
People's Partnership
PrincipalEngineer About People’s Partnership: At the heart of our not-for-profit organisation is a commitment and a motivation to make the future-saving experience a simple one for our members. We champion fairness and simplicity, not profit-chasing. Imagine a financial adventure where everyone's a winner, fuelled by our exceptional service and brought to … with a flexible, hybrid working approach, ensuring everyone gets the opportunity to come to work and be the best version of themselves. What you'll be doing: As a PrincipalEngineer for our dynamic and growing team, you will play a crucial role in architecting the development and maintenance of our applications, ensuring optimal system structures, efficiency, and More ❯
chichester, south east england, united kingdom Hybrid / WFH Options
People's Partnership
PrincipalEngineer About People’s Partnership: At the heart of our not-for-profit organisation is a commitment and a motivation to make the future-saving experience a simple one for our members. We champion fairness and simplicity, not profit-chasing. Imagine a financial adventure where everyone's a winner, fuelled by our exceptional service and brought to … with a flexible, hybrid working approach, ensuring everyone gets the opportunity to come to work and be the best version of themselves. What you'll be doing: As a PrincipalEngineer for our dynamic and growing team, you will play a crucial role in architecting the development and maintenance of our applications, ensuring optimal system structures, efficiency, and More ❯
Bagshot, Surrey, United Kingdom Hybrid / WFH Options
Telent
PrincipalEngineer - Wireless Job Description When you join our Engineering Team at Telent, you'll be empowered to innovate and drive common solutions, working closely with technical experts who are proud of the impact their work makes. Come join a high-performing team doing complex and critical work. Help build and keep the nation's critical infrastructure connected … and protected 24/7. Reporting into the Head of Focal Engineering, the PrincipalEngineer will work on a number of exciting Wireless Design and Implementation projects for customers across England in the Education and Government sectors as well as others. This is a hybrid working role, with a requirement to travel to our customer sites on occasion. … design and implementation of enterprise-grade wireless network solutions across universities in England, leveraging Cisco and Juniper technologies to deliver secure, scalable, and high-performance connectivity. Act as the principal design authority, setting technical direction, standards, and best practices for campus wireless and wired infrastructure, ensuring alignment with university digital transformation objectives. Develop and review detailed low-level designs More ❯
GU15 1PQ, Bagshot, Surrey, United Kingdom Hybrid / WFH Options
Telent
PrincipalEngineer - Wireless Job Description When you join our Engineering Team at Telent, you'll be empowered to innovate and drive common solutions, working closely with technical experts who are proud of the impact their work makes. Come join a high-performing team doing complex and critical work. Help build and keep the nation's critical infrastructure connected … and protected 24/7. Reporting into the Head of Focal Engineering, the PrincipalEngineer will work on a number of exciting Wireless Design and Implementation projects for customers across England in the Education and Government sectors as well as others. This is a hybrid working role, with a requirement to travel to our customer sites on occasion. … design and implementation of enterprise-grade wireless network solutions across universities in England, leveraging Cisco and Juniper technologies to deliver secure, scalable, and high-performance connectivity. Act as the principal design authority, setting technical direction, standards, and best practices for campus wireless and wired infrastructure, ensuring alignment with university digital transformation objectives. Develop and review detailed low-level designs More ❯
Stoke Gifford, Gloucestershire, United Kingdom Hybrid / WFH Options
Synoptix
Principal Systems Engineer The Role: As a Principal Systems Engineer at Synoptix you will be helping guide the scope and direction of the engineering projects you are working on. As an agile business in the true sense the principalengineer will be given the relative freedom to take ownership at the strategic level of More ❯
Bristol, Stoke Gifford, Gloucestershire, United Kingdom Hybrid / WFH Options
Synoptix
Principal Systems Engineer The Role: As a Principal Systems Engineer at Synoptix you will be helping guide the scope and direction of the engineering projects you are working on. As an agile business in the true sense the principalengineer will be given the relative freedom to take ownership at the strategic level of More ❯
Bristol, Avon, South West, United Kingdom Hybrid / WFH Options
Synoptix Limited
Principal Systems Engineer The Role: As a Principal Systems Engineer at Synoptix you will be helping guide the scope and direction of the engineering projects you are working on. As an agile business in the true sense the principalengineer will be given the relative freedom to take ownership at the strategic level of More ❯
Cambridge, Cambridgeshire, East Anglia, United Kingdom
Singular Recruitment
Principal RF Engineer As the selected Principal RF Engineer , your role will be split between designing RF systems at component level, and providing technical leadership for the development of projects. The right candidate will have a solid background in RF design, experience of taking a leading role on engineering projects and be an excellent communicator. The … role is an 80/20 split in favour of design to leadership. Responsibilities for the role of Principal RF Engineer will include: Designing and developing RF systems at the component level. Conducting performance tests and optimizations to meet specified performance criteria. Leading integration and prototyping efforts to ensure seamless integration of sub-systems with larger systems or … support on technical issues. Engage in project management activities, such as updating project timelines, managing resources, and communicating with stakeholders to ensure project milestones are met. As the selected Principal RF Engineer, your experience will include: RF electronics design background. Strong ability to demonstrate technical leadership within a product development environment. Experience of specifying technical requirements and taking More ❯
