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Principal United Kingdom Jobs

590 Job Offers

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Principal Product Advisor
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Dragos seeks a Principal Product Advisor to drive NIS-2 compliance strategy for OT cybersecurity products across EU critical infrastructure. Requires deep OT security expertise, NIS-2 knowledge, and EU stakeholder relationships. UK-based with equity and benefits.
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Dragos
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Principal Product Manager - Personalization
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Lead product strategy for Spotify's Search Personalization team, shaping how millions discover music, podcasts, and audiobooks. Requires 8+ years in product management and deep expertise in AI-native search, ranking, and relevance. Based in London or Stockholm.
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Spotify
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Principal (Director), Commercial Excellence and Pricing
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Lead commercial excellence and pricing transformation projects for top technology clients at Analysys Mason in London. Drive business development, build senior relationships, and grow practice. Enjoy bonus, private healthcare, flexible working and career coaching.
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Analysys Mason
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CS&A Principal Engineer
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Assystem seeks a CS&A Principal Engineer for the Box Encapsulation Plant at Sellafield, Cumbria. Requires chartered status (CEng MICE/MIStructE), nuclear sector experience, and proven engineering leadership. Lead design assurance and site teams on this critical nuclear project.
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ASSYSTEM
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Principal EC&I Engineer
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Assystem seeks a Principal EC&I Engineer in Warrington to lead nuclear, defence and infrastructure projects. Requires 10+ years in EC&I design, team leadership and regulated industry expertise. Apply now!
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ASSYSTEM
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Principal Success Architect - AI Control Tower
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Lead enterprise AI adoption as a Principal Success Architect in London. Guide customers through AI Control Tower implementation, EU AI Act compliance, and governance frameworks. Requires 5+ years in GRC or AI governance with strong advisory skills.
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Armis
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Principal Design Engineer – Infrastructure
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Lead rail infrastructure design in York as Principal Design Engineer. Requires CEng, PTS certification, and proven experience delivering civil engineering projects. Competitive salary, car allowance, and strong benefits.
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AmcoGiffen
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Principal Design Engineer – Temporary Works
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Lead Temporary Works design across major rail and civils projects in Pontyclun as Principal Design Engineer. Requires IEng/CEng, Sentinel PTS and strong civil design experience. Competitive salary, car allowance and excellent benefits.
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United Kingdom, Pont-y-clun
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AmcoGiffen
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Principal Engineer (Telecoms)
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Lead telecoms design on major rail infrastructure projects as Principal Engineer. Act as CRE, mentor engineering teams and ensure Network Rail compliance. Hybrid role in York or Cumbernauld with car allowance and strong benefits.
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United Kingdom, York, Cumbernauld
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AmcoGiffen
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Principal Electrical Building Services Engineer
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Lead electrical building services projects in Birmingham as Principal Electrical Engineer. Requires BEng/MEng, 5-10 years design experience, Chartered status, and Revit/MagiCAD skills. Flexible working and career growth offered.
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Royal HaskoningDHV
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Principal Process Design Engineer
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Lead water and wastewater process design projects as Principal Process Engineer in Manchester. Requires 10+ years regulated water industry experience, Chartered status, and strong technical leadership skills.
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Alexander Associates
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Product Manager, New Product Bet (Principal-level)
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Synthesia seeks a Principal Product Manager in London to own Surveys and Guidance for a new agentic, real-time AI product bet. Requires zero-to-one experience, strong strategy skills, and commercial impact focus.
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Synthesia
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Director, Principal Product Designer - Aladdin Design
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Lead UX strategy for BlackRock's Aladdin platform as Director, Principal Product Designer in the UK. Senior IC role shaping complex enterprise fintech experiences, driving design vision with Product and Engineering.
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BlackRock Investments
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Principal Data Engineer
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Lead the Future State Data Platform strategy at Funding Circle in London. Requires 10+ years in Data Engineering and deep Snowflake, AWS, dbt and Airflow expertise. Enjoy flexible benefits and share schemes.
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Funding Circle
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Principal Security Engineer (AppSec)
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Teya seeks a Principal Security Engineer in London to lead SSDLC transformation and embed AppSec practices across engineering. Deep application security expertise and an attacker mindset required.
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Teya
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CS&A Principal Engineer
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Assystem seeks a CS&A Principal Engineer in Warrington to lead design and site engineering teams on the Box Encapsulation Plant at Sellafield. Requires chartered status (ICE or IStructE), nuclear sector experience, and strong structural design expertise.
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ASSYSTEM
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Principal Nuclear Security Engineer
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Assystem seeks a Principal Nuclear Security Engineer in Glasgow to provide engineering assurance for security-related nuclear assets. Requires high-hazard regulated experience, SyAPs knowledge, and security case expertise.
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ASSYSTEM
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Principal Information Security & Data Protection Officer
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Lead information security and data protection at Unmind, a mental health tech company. Remote-first UK role requires ISO 27001, UK/EU GDPR expertise, and DPO experience. Drive AI governance and client trust.
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Unmind
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Principal Java Engineer
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Lead Java development at a modern software house in Manchester. Drive Agile delivery, build features with Spring Boot, AWS and Kubernetes, and mentor your team. Bonus included.
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70000.00 - 80000.00 GBP / Year
Burns Sheehan
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Principal Engineer
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Motorway seeks a Principal Engineer in London to set technical strategy across product areas. Requires 10+ years in software engineering, deep AWS expertise, and strong API/identity architecture skills. Hybrid role with stock options.
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Motorway
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About the Principal role

A Principal role represents a senior leadership position found across various industries, from construction and engineering to technology and product management. Individuals in these jobs are trusted with high-level strategic oversight, complex problem-solving, and driving significant organizational impact. Unlike entry-level or mid-career positions, Principal jobs typically require a deep well of specialized expertise, a proven track record of leadership, and the ability to influence direction without direct managerial authority over every team member.

In a professional context, a Principal is often the highest individual contributor or a senior team lead responsible for shaping the vision and execution of critical initiatives. For example, in design and construction sectors, a Principal Designer focuses on risk management from the earliest stages of a project. They ensure that health and safety regulations, such as the CDM Regulations 2015, are integrated into the design process, mitigating hazards before construction begins. This involves leading cross-functional coordination, conducting design reviews, and ensuring a seamless handover to contractors.

In technology and business strategy, Principal Product Managers own the end-to-end lifecycle of complex service portfolios or product lines. They are responsible for defining strategy, developing business cases, and launching innovative offerings that drive customer adoption and revenue growth. These roles demand a data-driven approach to decision-making, strong cross-functional leadership, and the ability to influence executives and stakeholders across engineering, sales, marketing, and customer success teams. Common responsibilities include market analysis, competitive benchmarking, pricing strategy, and building go-to-market plans.

Typical skills required for Principal jobs include exceptional communication and presentation abilities, strategic thinking, and a high degree of autonomy. Candidates usually possess a bachelor’s or master’s degree in a relevant field, combined with significant experience—often eight or more years in a related domain. Technical proficiency is critical, whether in understanding network security, cloud infrastructure, or construction regulations. Soft skills such as negotiation, mentorship, and the ability to drive alignment in matrixed organizations are equally important.

Ultimately, Principal jobs are about leading from the front, solving the most challenging problems, and setting the standard for excellence within an organization. Whether mitigating risk on a construction site or defining the future of a software platform, these professionals are integral to driving meaningful, lasting results.