Job Req ID: 60978

Posting Date: 10th August 2026

Function: Digital

Location: Birmingham, Hybrid 3 days onsite 2 remote

About the role

We are seeking an experienced and highly skilled Senior Frontend Software Engineer to play a key role in the evolution of our Arc Design System, driving the development of scalable, accessible, and high-performance frontend platforms that power our digital products.
In this role, you will architect and build enterprise-grade reusable UI components, establish frontend best practices, and shape the technical direction of our Design System. Working closely with UX/UI Designers, Product Managers, Architects, and Engineering teams, you will transform design concepts into robust, production-ready solutions while ensuring consistency, accessibility, performance, and exceptional developer experience across multiple applications.
As a senior member of the engineering team, you will provide technical leadership through architectural decision-making, mentoring, code reviews, and the establishment of engineering standards. You will champion modern frontend technologies, Design System governance, accessibility (WCAG), performance optimisation, and AI-enabled development practices to continuously improve our frontend platform.This is an excellent opportunity for an experienced frontend engineer who is passionate about building scalable platforms, influencing engineering strategy, and delivering reusable solutions that enable product teams to develop high-quality user experiences efficiently and consistently.

What you’ll be doing

• Architecting scalable, resilient, and high-performance frontend platforms, developer tooling, and user experiences that support long-term business and engineering goals.
• Use problem-solving and analytical skills, with the ability to evaluate trade-offs, make strategic architectural decisions, and drive technical direction across complex systems.
• Proven ability to mentor engineers, lead technical discussions, conduct thoughtful code reviews, and foster a culture of collaboration, engineering excellence, and continuous learning.
• Exhibit strong sense of ownership and accountability, driving initiatives from technical design through implementation, deployment, and long-term maintenance while ensuring high standards of quality and reliability.
• Adapt emerging frontend technologies, AI-driven development, developer experience (DX), and modern engineering practices, with the ability to assess and introduce innovations that deliver measurable value.
• Build maintainable, reusable, accessible, secure, and thoroughly tested software, while establishing best practices, engineering standards, and scalable patterns across teams.

Essential Skills / Experience

• Deep expertise in React, Next.js, TypeScript, and modern frontend architecture, including SSR/SSG, React Server Components, micro-frontends, state management strategies, and scalable application design.
• Proven experience architecting, governing, and evolving enterprise-grade Design Systems, reusable component libraries, and frontend platforms with strong emphasis on maintainability, consistency, and developer experience.
• Hands-on experience designing and integrating AI-powered applications using Model Context Protocol (MCP) servers, LLM APIs, agent workflows, tool orchestration,

Desirable Skills / Experience

• Strong understanding of design token architecture, token governance, and cross-platform token management using industry-standard platforms to ensure seamless collaboration between design and engineering.
• Expert knowledge of web accessibility (WCAG 2.2 AA), semantic HTML, inclusive design principles, responsive and adaptive UI development, Core Web Vitals, frontend performance optimization, rendering strategies, and advanced debugging/profiling techniques.

Our Package

Tailored benefits make a real difference. That’s why we offer a comprehensive range to support your growth, wellbeing, and everyday life. You can design the package to suit you and your lifestyle. Your core benefits include:

• 10% on target annual bonus
• Access to an online private GP 24/7 for you and your immediate family
• Market-leading paid carers leave with up to 2 weeks off
• Equalized maternity, paternity, and adoption leave – 18 weeks’ full pay and 8 weeks’ half pay
• Discounted EE and BT products, including mobile and broadband
• Market leading Pension scheme – 5% from you and 10% from us
• Holiday purchase scheme
You can select additional benefits, including healthcare, dental, gym memberships and more when you’re ready. Ready to connect for good and help shape the future? Apply now.

BT Group is the UK’s leading communications group and the holding company behind some of the country’s most recognised brands – including BT, EE, Openreach and Plusnet. Our purpose is as simple as it is ambitious: we connect for good. Our customers include consumers, small, medium and large businesses, public sector organisations and other communications providers.

BT Group’s role is about setting direction, unlocking value and creating the conditions for our brands and businesses to thrive.

Having come through the most capital-intensive phase of our fibre investment, our focus now is on what comes next – simplifying how we operate, using technology and AI to work smarter, and organising ourselves to serve customers better and grow sustainably. Group teams shape strategy, policy, brand, capital allocation and transformation, helping the whole organisation perform at its best.

We have a singular culture that unites all our people: we are customer-first challengers, who are committed, clear and connected. These behaviours unite us as one team to deliver for our colleagues, our customers, our stakeholders and the country. Joining BT Group means working at the heart of a business that matters to the UK, with the opportunity to shape decisions, influence outcomes and help set the future course of one of the country’s most important companies.