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Principal Frontend Developer React jobs in London· Page 7

Results 121–140 of 1,515 for “Principal Frontend Developer React” in London.

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ComplyAdvantage logo
Full-time|On-site|London, England, United Kingdom

The RoleJoin us as a Principal Product Manager for our Transaction Fraud product area within the Risk Applications tribe. This is a pivotal individual contributor role where you will have significant commercial accountability, overseeing business outcomes in your domain, not merely focusing on delivery.You will collaborate within a dedicated squad alongside …

Mar 11, 2026
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AECOM logo
Full-time|Hybrid|London

Begin your journey with us and advance your career.We are thrilled to present an opening for an accomplished and innovative Principal Façade Engineer to be part of our expanding and vibrant team. This role is perfect for a forward-thinking leader who excels in providing cutting-edge engineering solutions, fostering the development of talented professionals, and propelling business growth through strategic initiatives.Your role will involve:Leading the execution of a diverse portfolio of national and international projects across multiple sectors, ensuring an optimal balance of quality, feasibility, schedule, and cost.Securing project fees and negotiating contracts of various scales.Building and nurturing strong relationships with clients and referrers, encouraging the exploration of new business opportunities.Representing AECOM at industry events and conferences, highlighting our work and capabilities.Creating compelling proposals and leading successful presentations to win new projects.Mentoring a team of engineers, enabling them to realize their potential and enhance their skills.Overseeing the professional growth of engineers, including performance reviews, chartership, and essential management tasks to support team development.Managing façade team resources to meet technical and workload demands while pursuing personal skill development goals.Participating in R&D efforts to promote sustainable and energy-efficient design solutions.Collaborating with other teams within AECOM to further company-wide initiatives and multidisciplinary project delivery.Join us and grow:At AECOM, we offer a range of benefits tailored to support your well-being and career aspirations, customized to fit your lifestyle. Enjoy opportunities for career development, a flexible hybrid working model to ensure a work-life balance that suits you, access to technical practice networks, AECOM University, and volunteering days.

Mar 16, 2026
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Pipedrive logo
Full-time|On-site|UK, London

At Pipedrive, we understand that exceptional products stem from exceptional people. Our team embodies our company values, which guide our hiring process. Since our inception in 2010, we have been dedicated to equipping sales and marketing teams with intuitive, powerful tools that streamline their daily operations. Currently, our cloud-based software is trusted by more than 100,000 companies across 179 countries. Having evolved from a five-person startup to an expansive international organization of over 850 professionals representing over 50 nationalities, we proudly operate from ten offices spanning Europe and the US. In 2020, we became the fifth unicorn from Estonia following a significant investment from Vista Equity Partners, a leading global investment firm focused on enterprise software and technology-enabled businesses.We are on the lookout for a Principal Product Manager to take charge of our Agentic AI experiences and the foundational AI platform capabilities that support them. In this individual contributor role, you will define how Agentic AI creates value for our customers within the Pipedrive CRM ecosystem, designing experiences that prioritize safety, reliability, and scalability. You will also play a key role in developing and enhancing shared platform capabilities that enable product teams to consistently deliver AI-powered experiences at scale.This role encompasses both customer-facing Agentic AI functionalities and the internal AI platform infrastructure. You will work at a systems level, collaborating closely with engineering, applied AI and machine learning, design, security, and product teams to ensure our Agentic AI delivers significant customer value while maintaining technical integrity and operational scalability.Reporting directly to the VP of Product, this high-impact position is perfect for a seasoned product leader who merges strong product vision and customer-centricity with an in-depth understanding of AI systems and complex platforms.

Feb 13, 2026
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CoreWeave logo
Full-time|On-site|London, UK

Join CoreWeave as a Principal Solutions Architect and lead the charge in translating visionary AI ambitions into actionable deployment strategies within the automotive and advanced manufacturing sectors.The Physical AI Field Engineering team collaborates with some of the world's leading engineering organizations to architect and realize AI-driven solutions for complex physics challenges. By leveraging industry expertise, machine learning innovations, and large-scale computing infrastructure, you will help enterprises transform their ambitious AI goals into practical, scalable deployments.As CoreWeave enhances its capabilities in AI infrastructure and applied machine learning, your role will be pivotal in identifying transformative engineering problems and designing viable technical pathways to resolve them.

Apr 3, 2026
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AND Digital logo
Full-time|Hybrid|London, England, United Kingdom

Job Overview: Lead Product Developer (Tech Lead)Location: London (Hybrid - 3 days in-office)Reporting to: Delivery Lead / Client Services DirectorAbout Us:At AND Digital, we are a forward-thinking technology company committed to accelerating digital delivery and bridging the digital skills gap. Since our inception in 2014, we have been instrumental in enabling organizations to create superior digital products and cultivate robust digital teams.We believe in making a significant impact for our clients through our unique regional offices, known as 'Clubs', which foster strong partnerships and prioritize client needs with dedicated local teams.This innovative approach has propelled our success, reflected in our impressive organic growth since 2014. With over 1,300 talented individuals across Clubs in the UK, Europe, and the USA, we are on a mission to expand globally in the coming years.Join us in our vision to close the global digital skills gap!The RoleWe are in search of a Lead Product Developer to spearhead a significant project for one of our key clients, a global leader in the media and entertainment sector. In this position, you will not only oversee project delivery but also serve as the technical cornerstone of a vital platform that delivers advertising solutions and audience insights globally. This opportunity is ideal for a proactive technical expert who thrives in scaling sophisticated cloud-native architectures while nurturing a high-performance culture across dispersed teams.Key Responsibilities1. Technical Excellence & ExecutionHands-on Engineering: Lead by example as you continue to engage in hands-on development, writing high-quality code in Java and React, while ensuring the platform maintains scalability, security, and performance.Architectural Stewardship: Collaborate with Technical Architects to ensure the sustainability of our AWS-based ecosystem, balancing rapid delivery with technical integrity.Engineering Culture: Establish the benchmark for engineering practices, from robust CI/CD pipelines to thorough code reviews, fostering technical pride within the team.2. Team Leadership & EnablementDistributed Team Growth: Act as a liaison between our London stakeholders and Nearshore development teams, creating a cohesive “one-team” atmosphere that guarantees high code quality and consistency across regions.Mentorship: Encourage the development of ANDis and client developers, promoting a culture of high achievement through coaching and collaborative reviews.3. Stakeholder ManagementCollaborative Influence: Navigate a complex landscape of stakeholders...

Apr 8, 2026
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Intercom logo
Full-time|On-site|London, England

At Intercom, we are revolutionizing customer service with our cutting-edge AI technology. Our mission is to empower businesses to deliver exceptional customer experiences through our advanced AI agent, Fin. With Fin, companies can provide round-the-clock, stellar customer support and enhance their overall customer interactions.Integrated with our Helpdesk, the Intercom Customer Service Suite offers a comprehensive solution for handling complex queries that necessitate human intervention. Since our inception in 2011, we have gained the trust of nearly 30,000 businesses worldwide, continuously setting new benchmarks in customer service excellence.What’s the Opportunity?As a Principal Engineer on our web platform team, you will play a pivotal role in shaping the technical foundations and architectural advancements of our web services. Our websites, including intercom.com and fin.ai, are key drivers for our growth, enabling storytelling, branding, experimentation, and product discovery.In this cross-functional leadership position, you will collaborate with marketing, analytics, design, data science, and engineering teams to ensure our web stack remains modern, efficient, and a joy to work with. You will have the autonomy to define and implement the long-term technical strategy for our team.

Jan 28, 2026
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Capco logo
Full-time|On-site|UK - London

Join Capco as a Principal Consultant in our Capital Markets division, where you will lead strategic initiatives and drive innovation in financial services. You will collaborate with clients to deliver cutting-edge solutions, leveraging your expertise in capital markets to enhance operational efficiency and achieve business objectives.In this dynamic role, you will manage high-impact projects, mentor junior staff, and work closely with stakeholders to ensure the successful implementation of programs. Your ability to navigate complex regulatory environments and your strong analytical skills will be vital in shaping the future of our clients' businesses.

Feb 27, 2026
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Capco logo
Full-time|Hybrid|UK - London

Role Overview Capco is hiring a Managing Principal (Director) for Cyber & Operational Resilience in London. This permanent position sits within the Finance, Risk, Regulatory & Financial Crime practice. Work is hybrid, with time split between the London office and remote. What You Will Do Lead major cyber and operational resilience transformation projects for financial services clients. Act as a strategic advisor, helping clients shape and refine their resilience strategies. Oversee the delivery of complex programs, ensuring solutions are comprehensive and effective. Collaborate closely with senior stakeholders at leading financial institutions. Drive growth and capability within Capco’s Risk practice. Location and Practice Area Location: London (Hybrid) Practice Area: Finance, Risk, Regulatory & Financial Crime Type: Permanent

Apr 17, 2026
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Verifone logo
Full-time|On-site|London, England, United Kingdom

Why VerifoneVerifone has been a pioneering leader in the electronic payment technology sector for over 40 years. Recognized as one of the foremost brands in electronic payment solutions, we rank among the largest providers of payment systems globally.At Verifone, we foster a diverse and dynamic work environment where results-driven employees have ample opportunities to excel. Our collaboration with top retailers, merchants, banks, and third-party partners enables us to innovate and deliver cutting-edge payment solutions worldwide. We are committed to excellence in our products and services, with an unwavering focus on customer satisfaction. Our team of dedicated professionals is at the forefront of the payments industry, driven by experience, innovation, and a bold spirit. Whether we're developing advanced secure payment platforms or exploring new markets for electronic payments, our passion for innovation propels each employee toward personal and professional success.About The RoleWe are looking for a Principal Software Engineer based in London to provide technical leadership for our global payment gateway systems. This role involves designing and evolving core platform capabilities, guiding architectural decisions across microservices, and mentoring engineers while remaining hands-on with critical systems built using Java and Spring Boot.This position is central to shaping the technical direction of systems responsible for processing high-volume, mission-critical financial transactions globally.In this role, you will go beyond mere feature delivery. You will be instrumental in driving architectural decisions, establishing engineering standards, and influencing how teams design, build, and maintain secure, scalable backend systems. Success is characterized by technical leadership, sound judgment in complex trade-offs, and ownership of systems that must operate reliably under real-world loads and regulatory requirements.Collaboration with senior engineering, platform, product, and infrastructure teams will be crucial to ensure our systems scale effectively, remain secure, and uphold the highest standards for availability and performance.

Feb 24, 2026
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Sony Interactive Entertainment logo
Full-time|On-site|United Kingdom, London

Why Choose PlayStation?At PlayStation, we pride ourselves on being more than just the premier destination for gaming; we are also recognized as a top employer. As a global leader in entertainment, we create exceptional products and services, including the PlayStation®5, PlayStation®4, PlayStation®VR, and PlayStation®Plus, alongside critically acclaimed software from PlayStation Studios.Our commitment to fostering an inclusive workplace empowers our employees and embraces diversity. We invite individuals who are passionate and curious about innovation, technology, and play to explore our career opportunities and become part of our expanding global team.PlayStation operates under Sony Interactive Entertainment, a wholly owned subsidiary of Sony Group Corporation.

Feb 12, 2026
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Faculty logo
Full-time|On-site|London

Why Join Faculty?Founded in 2014, Faculty believes that artificial intelligence (AI) will shape the future of technology. With over 350 global clients, we have consistently delivered transformative AI solutions that engage human-centric approaches. Explore our impact here.We prioritize innovation over trends, focusing on responsible AI that drives significant results. Our team combines unmatched technical, product, and delivery expertise, serving clients across various sectors including government, finance, retail, energy, life sciences, and defense.As our business and reputation flourish, we seek individuals who share our passion for intellectual exploration and a commitment to leaving a lasting technological legacy.Join us in harnessing AI’s potential to create powerful solutions that will define the future.About Our TeamIn our Professional and Financial Services division, we leverage over a decade of applied AI experience to guide our clients through a rapidly evolving landscape.We design and implement AI solutions that enhance operational efficiency, improve customer experiences, and unlock commercial opportunities in uncertain markets. Operating within a highly regulated environment, we embrace the potential for meaningful innovation while setting the benchmark for technical excellence and secure deployment.About the RoleAs a Principal Data Scientist at Faculty, you will be a technical authority and domain expert, responsible for leading the delivery of intricate, high-impact projects for our key clients. You will establish the technical vision for the data science team while mentoring and developing our data scientists to ensure they remain at the forefront of the industry.Your ResponsibilitiesActing as a technical expert on machine learning, generative AI, and other advanced data science methodologies to deliver innovative solutions.Driving the execution of high-stakes projects while ensuring the highest standards of quality and technical excellence.

Nov 25, 2025
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The Economist Group logo
Full-time|On-site|London - Commercial

Join The Economist Group as a Principal Product Manager for our AI Platform, where you will lead innovative projects that shape the future of artificial intelligence in our products. In this pivotal role, you will collaborate with multidisciplinary teams to drive product strategy, enhance user experiences, and ensure the delivery of cutting-edge AI solutions. Your leadership will be key in aligning product vision with market demands, optimizing product performance, and driving continuous improvement.

Mar 23, 2026
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MOO logo
Full-time|Hybrid|London

Join MOO, a dynamic company that has been revolutionizing the print industry since 2006. With a growing team of over 400 talented individuals, we strive to create innovative print and digital products for businesses of all sizes, ranging from industry giants like Google and Airbnb to local artisans at craft fairs.Our global headquarters is located in London, UK, and we have additional offices in Dagenham, as well as locations in Boston, MA, East Providence, RI, and Denver, CO in the United States.As we continue to innovate, we are seeking a skilled Principal Engineer to join our Post-Purchase domain, where you will play a key role in integrating physical and digital processes including order orchestration, manufacturing, fulfillment, shipping, and customer support tooling. This is an exciting opportunity to influence our tooling strategy for Customer Support and Operations, enhance data visibility across the order journey, and collaborate with Nexus and Forge teams to build a scalable architecture that supports cross-team delivery.This role is based in our Camden office for 2-3 days a week, with potential travel to Rhode Island, USA to collaborate with our Manufacturing team.

Apr 12, 2026
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Capco logo
Full-time|Hybrid|UK - London

Role Overview Capco is hiring a Principal Consultant for Cyber & Operational Resilience in London (hybrid). This permanent position sits within the Finance, Risk, Regulatory & Financial Crime practice area. The role focuses on strengthening cyber and operational resilience for financial services clients, working closely with senior stakeholders to design and implement effective strategies that meet regulatory standards. Main Responsibilities Lead programs that transform cyber and operational resilience, ensuring compliance with frameworks such as PRA and DORA. Assess and enhance existing cyber resilience frameworks, controls, and operational models. Perform third-party and vendor risk assessments to uncover vulnerabilities in supply chains and technology environments. Create and deliver governance frameworks for resilience, including scenario testing and reporting (such as IBS/ITOL). Partner with technology teams to improve cyber tooling, cloud security, and related controls. What Capco Looks For Background in cyber risk management and operational resilience. Solid understanding of regulatory requirements and frameworks in financial services. Strong stakeholder management and communication abilities. Comfort working collaboratively in a hybrid (onsite and remote) setting.

Apr 17, 2026
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vidrush logo
Full-time|On-site|United Kingdom

Join vidrush as a Backend Engineer specializing in TypeScript and React, along with AWS Cloud technologies. You will be integral in developing and maintaining billing systems that are crucial to our operations.This role involves collaborating with cross-functional teams to implement solutions that enhance our product offerings and improve user experience. If you are passionate about backend development and cloud technologies, we would love to hear from you!

Mar 25, 2026
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Turner Townsend logo
Full-time|On-site|London

Role overview Turner Townsend seeks a Principal Consultant specializing in Business Case and Project Finance for its London office. This role leads teams on major infrastructure projects, aiming for strong financial results and practical client solutions. What you will do Guide project teams in developing business cases and shaping project finance strategies Monitor progress to ensure financial and operational targets are met Collaborate with colleagues to address client requirements and deliver customized outcomes Apply subject matter expertise to projects that shape the future of infrastructure Collaboration and impact This position works closely with professionals who value quality and innovation. Leadership and insight in this role help clients reach their goals and reinforce Turner Townsend’s reputation for reliable project delivery.

Apr 24, 2026
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Capco logo
Full-time|Hybrid|UK - London

Role Overview Capco is hiring a Principal Consultant focused on Non-Financial and Operational Risk. This permanent position is based in London with a hybrid work arrangement. The role sits within the Finance, Risk, Regulatory & Financial Crime practice. What You Will Do Lead large-scale risk transformation programs, covering enterprise and operational risk areas. Oversee trade surveillance and market abuse frameworks, refining detection scenarios and controls for better outcomes. Advise clients on regulatory requirements and help design practical, strategic solutions. Apply and supervise AI and model tuning methods to strengthen risk monitoring and minimize false positives. Build and sustain relationships with senior stakeholders, acting as a trusted advisor to client leadership teams. Location and Employment Details Location: London (hybrid) Practice area: Finance, Risk, Regulatory & Financial Crime Employment type: Permanent

Apr 17, 2026
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Delta Capita logo
Full-time|On-site|London, Greater London, United Kingdom

Delta Capita is expanding its Consulting division in London, partnering with major financial institutions worldwide. The Managing Consultant / Principal Consultant – Finance Transformation takes the lead on significant finance transformation and cost optimization initiatives for clients in banking and financial services. Role overview This position focuses on guiding clients through complex finance change programs. Projects often involve improving financial processes, redesigning operating models, and using data to drive better decision-making. The role requires close collaboration with senior stakeholders and hands-on leadership throughout each engagement. What you will do Lead large-scale transformation projects centered on finance change, data-driven improvements, and operational model redesign. Support clients in refining accruals processes, cost allocation approaches, management information (MI), controls, and analytics capabilities. Engage directly with senior client stakeholders to understand their needs and deliver tailored solutions. Oversee delivery streams and, when needed, manage small teams on complex transformation assignments. Learn more Further details about Delta Capita's Consulting services are available at Consulting - Delta Capita.

Apr 22, 2026
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Marshmallow logo
Full-time|On-site|London

About MarshmallowAt Marshmallow, we strive to simplify the migration process.Addressing a complex challenge of this scale requires a team of inquisitive minds dedicated to discovering innovative solutions. We are looking for individuals who question the why, deconstruct assumptions, and proactively seek to create better pathways.A career at Marshmallow promotes continuous growth, with a strong emphasis on learning. You will be encouraged to elevate your skills and will receive the necessary tools and support to achieve this, enabling you to produce meaningful work and instigate change.If you resonate with our approach at Marshmallow, we invite you to explore our Culture Handbook to learn more.Advance our mission and your career simultaneously.Data Science at MarshmallowOur Data Science team collaborates across various departments to transform data into informed decisions, enhanced products, and streamlined customer experiences. We partner closely with Product, Engineering, and Operations to develop and implement models and AI systems that are dependable in production and yield measurable results.In this role within Data Science, you will focus on Claims, particularly Claims Fraud, and drive our vision to further automate the claims process. This area represents a vital interaction point for our customers, and we seek a Principal Data Scientist capable of providing technical direction in both traditional Machine Learning and Generative AI. You will apply systemic thinking to scale decision-making processes and confidently assess proposals to ensure we build resilient and sustainable solutions.Key ResponsibilitiesLead technical initiatives within data science for Claims Fraud, influencing risk decision-making and fraud detection in collaboration with Product and Engineering teams.Design, develop, and refine production ML and Generative AI/LLM systems that facilitate claims validation and automation.Work closely with fellow Claims data scientists to incorporate systemic thinking regarding the integration of models, data, and workflows, pinpointing architectural enhancements necessary to scale decision-making and accelerate time-to-production.Advocate for essential platform and tooling investments (monitoring, feedback loops, QA) required to accomplish AI-driven end-to-end claims automation.Champion the development of robust, scalable, and strategic solutions that address the challenges within our claims processes.

Feb 18, 2026
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AECOM logo
Full-time|On-site|London

Role Overview AECOM is hiring a Principal Mechanical Engineer with a focus on data centres in London. This senior position shapes the design and operation of advanced data centre facilities. What You Will Do Lead technical projects for data centre mechanical systems Guide and mentor junior engineers Work closely with multidisciplinary teams to deliver efficient, sustainable solutions Drive high standards for performance and reliability in data centre design

Apr 14, 2026

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