1 to 25 of 178 Principal Engineer Jobs in the UK

Principal Software Engineer – Circa £100K On behalf of our thriving global client, we are recruiting for an experienced Principal Engineer. As Principal Engineer is responsible for developing and leading a customer-driven, product-oriented team. Your central responsibility is to be an equal partner with … define and incrementally improve a clearly defined set of business objectives and key results, and to lead the team in achieving those outcomes. The Principal Engineer will have the following: Expert technical skills, depth in at least one area, and an ability to operate up and down ...

Principal AI Engineer Generative AI, LLMs, Python, CI/CD, SaaS/PaaS, Prompt Engineering, Agentic Workflows, Platform Systems, Remote (UK) Up to £200,000 + Equity + Benefits This is a fantastic Principal AI Engineer opportunity to work with a leading technology services organisation … build and scale intelligent AI that delivers adaptive and impactful personalised experiences. The Principal AI Engineer is a remote working role, based in the UK. As a Principal AI Engineer, you will own and drive the development of the core AI system, building and scaling real ...

Principal Engineer - Series A Scale Up - Up to £270,000 I'm currently looking for a Principal Engineer to join a high-growth, YC-backed AI startup based in London. It's a hands-on IC role focused primarily on scalable backend systems and genuinely … fixing hard systems problems that unlocked scale – Have real hands-on Python experience If this sounds like a fit, please get in touch. Principal Engineer - Series A Scale ...

Principal Engineer l Architecture l Design l Coaching l Typescript l AWS l Kafka l GraphQL l Lambda l £550-£625 per day l Outside IR35 l twice a week in London l 3 months We're hiring a Principal Engineer to step into a critical … customer migration. You'll operate as a technical leader across multiple squads, shaping architecture, mentoring leads, and unblocking delivery. Essential Skills & Experience Proven Principal-level experience (80% Architecture/design - 20% Coding) Strong in AWS, TypeScript, event-driven systems Experience with high-scale distributed systems Someone collaborative, hands ...

Principal Engineer | TypeScript, Node, Azure | Global Environmental Data Non-Profit Powering Investment Decisions Salary: £75,000 £100,000 Hybrid (2 days a month London office) Im working with a genuinely purpose-led organisation that sits right at the intersection of data, climate, and global finance. Theyve built … with that comes the usual integration challenges. Systems that work, but dont always talk to each other cleanly. Youll come in as their first Principal Engineer, reporting into the CTO, with a remit to bring clarity and structure to how services integrate, while staying hands-on enough ...

Principal Software Engineer - £100K Adria Solutions has an exciting opportunity for a skilled Principal Software Engineer to join our growing client. As Principal Software Engineer you will have a proven track record of delivering high-quality solutions in a fast-paced, high impacting, Agile … ethic, with excellent software engineering practices. You will support the existing systems and help develop new ones as our client's product grows. The Principal Software Engineer will have the following: Confidence in delivering software solutions in C#, Go, Java or Python, with experience working with and refactoring ...

Principal Engineer (FinTech SaaS) – UK Remote 💻 We are representing a scaling B2B FinTech that provides core decisioning infrastructure for the global financial services sector. Their enterprise SaaS technology enables major lenders to modernise their credit assessment processes, allowing for more efficient deployment of capital to the commercial sector. … layers into traditional banking workflows, they are significantly improving how credit is optimised and distributed to businesses. We are looking for a product minded Principal Engineer to serve as the ultimate technical authority and strategic advisor across multiple product squads. 🇬🇧 Location: Remote-friendly (UK). The team values ...

Principal Engineer Location: Manchester Salary : £66,582 to £77,368 a year This role qualifies for a 12,5% per annum R&R (Band 8b) Vacancy Type: Permanent (Full-time, Flexible working, Compressed hours) This role qualifies for a 12.5% per annum recruitment and retention payment, in addition … Band 8B base salary. The National Institute for Health and Care Excellence (NICE) is seeking a Principal Engineer to provide senior leadership across the engineering, deployment, and production operation of digital applications and services. This is a strategic role focused on ensuring services are technically robust and designed ...

Principal Engineer | AI Systems & Distributed Platforms Remote (UK) | £90,000 to £120,000 | Early-Stage AI Start-Up We're partnered with an early-stage AI business building large-scale operational AI systems designed to automate highly complex enterprise workflows. This is not another 'AI wrapper' business. … entering a major scaling phase as both platform demand and customer onboarding accelerate. As a result, they're looking to hire a Principal Engineer to help shape the next evolution of the platform from both a systems and architecture perspective. The Opportunity This role sits directly alongside ...

Principal Design Engineer – RF & High Power Amplifier Systems Location: Watford, Hertfordshire Salary: £80,000 to £95,000 basic + Bonus + great benefits Hybrid working We are recruiting on behalf of a highly successful technology company that designs and manufactures advanced RF and microwave communication systems used … mission-critical applications worldwide. Due to continued growth and investment, they are seeking an experienced Principal Design Engineer to play a leading role in the development of next-generation High Power Amplifier (HPA) systems. This is an excellent opportunity for a hands-on engineer who enjoys solving ...

Principal Full Stack Engineer & Architecture Lead, Great Company going through massive growth. London (Hybrid) £100,000-£110,000 + Benefits Command Recruitment is proud to be partnering with an ambitious and rapidly growing healthcare company that is transforming access to specialist healthcare services across the UK. Expected … only 3 Years ago! This is the time to join this fast-moving and Growing Business This is a fantastic opportunity for an experienced Principal Engineer or Technical Architecture Lead to play a key role in shaping a modern, cloud-native healthcare platform that is making a genuine ...

Principal Full Stack Engineer & Architecture LeadLondon (Hybrid)£80,000 - £90,000 + BenefitsCommand Recruitment is proud to be partnering with an ambitious and rapidly growing healthcare company that is transforming access to specialist healthcare services across the UK.This is a fantastic opportunity for an experienced Principal Engineer … innovative healthcare service platforms and is seeking a hands-on technical leader who can combine strategic architecture with strong full-stack engineering expertise.The OpportunityAs Principal Full Stack Engineer & Architecture Lead, you will take ownership of platform architecture, engineering standards, cloud infrastructure, and technical delivery across the business.You ...

Title : Principal Network Engineer Contract Type: Permanent, Part Time, Full Time, Job Share option available Salary Range: c£80,000 dependent on experience Location: Eastleigh – Hybrid working environment, with a remote first approach Closing Date for applications: Wednesday 10th June 2026 Principal Network Engineer: At Ageas … Insurance, we’re looking for a Principal Network Engineer to act as our senior technical authority for network and connectivity services. You’ll shape the design, evolution, and resilience of our enterprise network estate across on prem, cloud, and hybrid environments—driving strategy, standards, and engineering excellence ...

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 principal engineer will be given ...

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 principal engineer will be given ...

Principal Engineer Post-Purchase & Fulfilment | London (Hybrid) | Up to £155,000 Principal Engineer's! Own the end-to-end architecture of how a physical product moves from factory floor to customer doorstep. Design led consumer brand with over 30 million customers worldwide. This is a rare ...

Principal Vulnerability Engineer (0-Day Research & Offensive Security Tooling) (Remote) About the Rol eWe are looking for an exceptional Principal Vulnerability Engineer to join our Offensive Security Research team. This is a unique opportunity for a highly technical security professional who combines elite vulnerability research capabilities … will help organizations identify and eliminate critical vulnerabilities before they can be weaponized by adversaries .This role is ideal for a Senior Vulnerability Researcher, Principal Security Engineer, Exploit Developer, Offensive Security Researcher, Red Team Researcher, Security Software Engineer, or Reverse Engineer looking to work on high ...

Principal Engineer - Fortinet 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 … keep the nation's critical infrastructure connected and protected 24/7. Reporting into the Head of Focal Engineering, the Fortinet Principal Engineer will be responsible for leading the design and delivery of secure, high-performance Fortinet SD-WAN solutions for our enterprise and public sector customers. This ...

Senior Software Engineer/Principal Software Engineer- C++, Python - Financial/Banking. Candidates will have a minimum 8+ years C++ experience and excellent knowledge of Python -coming from a Financial/Banking background with knowledge of Equities, Futures & Options and Fixed Income and Exchange Connectivity. Job Overview … amount of TPS to drive a highly efficient technology used by several markets around the world. To be successful in this role as a Principal Software Engineer - C++, you will be a proponent of agile methodology and modern software best practices. You can produce detailed technical work ...

Title: Principal Engineer Product Safety Location: Barrow-in-Furness, Filton or Broad Oak Hybrid We offer a range of hybrid and flexible working arrangements please speak to your recruiter about the options for this particular role. Salary: Negotiable, depending on experience Who we are: Join BAE Systems … standards in a safety context The Safety & Environmental Team: The team plays a critical role in ensuring product safety across major programmes. As a Principal Engineer, you will lead the development and maintenance of Safety Management Systems and Safety Cases, while supporting the SSNA programme. You will also ...

Principal Software Engineer Salary: Negotiable plus benefits, pension (7% contribution), 25 days holiday & life insurance We are looking for principal software engineers with diverse experience. We are a small but rapidly growing consultancy, owned highly experienced and recognised practitioners in UK defence consultancy. We are looking … candidates with a mix of technical expertise and interpersonal skills, able to work independently and in small teams. The Role: As a Principal Software Engineer, you will play a major role in leading and developing software engineering in the Software Modelling and Simulation, autonomy and geospatial fields, along ...

Principal Telecoms Engineer Gloucester £45,000 - £50,000 + Progression + Technical Leadership + Pension + Holidays + Hybrid Working + Strategic Influence + Holidays + Pension Are you an experienced telecoms solutions engineer with a strong background in network design, managed services and technical solution architecture … This is an excellent opportunity for a senior technical professional to take on a Principal Solutions Engineer position within a growing communications and technology organisation, leading solution design, innovation and technical strategy across a broad portfolio of telecoms and service offerings. The company is an established engineering ...

Principal Engineer (Data) Department Digital, Data & Technology Group Salary Starting from £53,189, rising to £62,335 (Salary inclusive of market supplement) Grade Grade 8 Contract Type Full Time, Open Ended Closing Date Tuesday 16 June 2026 Reference ML13700 AWS-focused Principal Data Engineer to lead ...

Principal Engineer | TypeScript, Node, Azure | Global Environmental Data Non-Profit Powering Investment Decisions Salary: £75,000 £100,000 Hybrid (2 days a month London office) Im working with a genuinely purpose-led organisation that sits right at the intersection of data, climate, and global finance. Theyve built ...

Staff Engineer/Principal Engineer/Lead Engineer - Full Stack UK Remote, moving to Hybrid : On-site one day per week (cadence depending on your location). Other locations/options available. Summary: Lead Forensics is a leading UK based SAAS company with products … sales and marketing space. We’re seeking a Staff level full stack Software Engineer/Software Developer to join our expanding teams that build our customer facing products. You’ll be technically leading work; from requirements capture and initial design, through to full implementation, iterating quickly on our modern ...