Javascript jobs in United Kingdom

Senior Platform Engineer

Manchester, Cheltenham or London

We are looking for a Senior Platform Engineer to design, build, and maintain modern, high-performance web applications integrated with the ServiceNow platform. You will lead the frontend development of applications using React, Vite, and components based off shadcn/radix-UI, ensuring seamless integration with backend ServiceNow workflows and APIs.

This is a hands-on technical role where you’ll collaborate closely with UX designers, ServiceNow engineers, and product stakeholders to create intuitive and scalable user interfaces that drive operational efficiency and excellent user experiences.

• Lead Frontend Development: Architect and implement frontend solutions using React, Vite, and shadcn/radix-UI, ensuring performance, accessibility, and maintainability.
• ServiceNow Integration: Work with ServiceNow developers to connect frontend components with ServiceNow APIs, data models, and workflows (e.g., via REST, GraphQL, or Service Portal integrations).
• UI/UX Implementation: Collaborate with design teams to translate wireframes and mock-ups into responsive, production-ready interfaces with pixel-perfect precision.
• Performance Optimisation: Optimize load times, rendering performance, and frontend build pipelines using Vite and modern React features (Suspense, server components, etc.).
• Component Design System: Develop and maintain a consistent UI component library based on custom and shadcn/radix-UI components and Tailwind v4, ensuring a cohesive design language across applications.
• Code Quality & Best Practices: Write clean, testable code following modern JavaScript, TypeScript and React patterns. Participate in code reviews, testing, and continuous integration.
• Collaboration & Mentorship: Work closely with cross-functional teams and mentor junior developers to improve overall frontend engineering practices.

Required:

• 5+ years of experience in frontend development, with a focus on React, JavaScript and TypeScript.
• Strong experience with Vite (or other modern build tools like Webpack, Rollup, or Parcel).
• Experience with shadcn/radix-UI, Tailwind v4, and modern UI design patterns.
• Proven experience integrating with backend systems and frameworks.
• Deep understanding of web application architecture, state management, (cached) querying (Redux, RTK etc.) and API consumption patterns.
• Familiarity with accessibility standards (WCAG) and responsive design principles.
• Excellent problem-solving and communication skills.

Nice to Have:

• Experience with backend architecture
• Knowledge of backend systems, cloud services (AWS, Azure), or micro frontend architectures.
• Familiarity with ServiceNow, ServiceNow UI builder and Now Experience.
• Background in DevOps practices (CI/CD, Docker, testing automation).

• Focusing on Clients and Customers.
• Working as One NCC.
• Always Learning.
• Being Inclusive and Respectful.
• Delivering Brilliantly.

At NCC Group, our mission is to create a more secure digital future. That mission underpins everything we do, from our work with our incredible clients to groundbreaking research shaping our industry. Our teams\' partner with clients across a multitude of industries, delving into, securing new products, and emerging technologies, as well as solving complex security problems. As global leaders in cyber and escrow, NCC Group is a people-powered business seeking the next group of brilliant minds to join our ranks.

Our colleagues are our greatest asset, and NCC Group is committed to providing an inclusive and supportive work environment that fosters creativity, collaboration, authenticity, and accountability. We want colleagues to put down roots at NCC Group, and we offer a comprehensive benefits package, as well as opportunities for learning and development and career growth. We believe our people are at their brilliant best when they feel bolstered in all aspects of their well-being, and we offer wellness programs and flexible working arrangements to provide that vital support.

Come join us?

If this sounds like the right opportunity for you, then we would love to hear from you! Click on apply to this job to send us your CV and cover letter and the relevant member of our global talent team will be in touch with you. Alternatively send your details to global.ta@nccgroup.com.

We review every application received and will get in touch if your skills and experience match what we’re looking for. If you don’t hear back from us within 10 days, please don’t be too disappointed – we may keep your CV on our database for any future vacancies and we would encourage you to keep an eye on our career opportunities as there may be other suitable roles.

If you do not want us to retain your details, please email global.ta@nccgroup.com. All personal data is held in accordance with the NCC Group Privacy Policy (candidate-privacy-notice-261023.pdf (nccgroupplc.com)). We are committed to diversity and flexibility in the workplace. If you require any reasonable adjustments to support you during the application process, please tell us at any stage.

Please note that this role involves mandatory pre-employment background checks due to the nature of the work NCC Group does. To apply, you must be willing and able to undergo the vetting process. This role being advertised will be subject to BS7858 screening as a mandatory requirement.