UI Engineer

📍 Job Overview

Job Title: UI Engineer

Company: National Grid

Location: Warwick, England, United Kingdom (Hybrid)

Job Type: Full-time

Category: Front-End Engineering / Software Development

Date Posted: 2026-04-13

Experience Level: Mid-Level (2-5 years)

Remote Status: Hybrid

🚀 Role Summary

• This role focuses on developing and maintaining user-centric, high-performance front-end interfaces for National Grid's digital platforms, leveraging modern web technologies like Angular.

• Key responsibilities include translating designs into scalable components, ensuring robust automated testing, and contributing to a shared design system for consistency across products.

• The position requires close collaboration with UX Designers, Product Managers, and Software Engineers within an Agile framework to deliver secure, accessible, and responsive user experiences.

• Candidates will play a crucial role in optimizing front-end architecture, improving load times, and upholding best practices in code quality and security.

📝 Enhancement Note: While the primary title is "UI Engineer," the detailed responsibilities and required skills clearly place this role within the front-end software engineering domain, emphasizing the development and technical implementation of user interfaces rather than purely visual design. The focus on Angular, TypeScript, and backend API integration solidifies its engineering nature.

📈 Primary Responsibilities

• Construct high-quality, responsive, accessible, and secure user interfaces using modern front-end technologies such as Angular, HTML, SCSS, TypeScript, and Node.js, ensuring seamless performance across various browsers and devices.

• Design, implement, and maintain a comprehensive suite of automated tests, including unit, integration, and behavioral tests, to ensure the quality and reliability of the digital front-end estate.

• Collaborate closely with UX Designers and Product teams to translate designs and prototypes into intuitive, scalable front-end components, adhering to a micro-frontend strategy and component-based architecture.

• Contribute to and evolve a shared design system to ensure a consistent and polished user experience across all digital products.

• Write clean, modular, and testable code that adheres to best-practice programming principles, accessibility standards (e.g., WCAG), and secure coding guidelines.

• Continuously enhance front-end performance and user experience through optimization of architecture, load times, and the implementation of intelligent code-splitting techniques.

• Participate in code reviews, provide constructive feedback to peers, and actively contribute to the development of front-end standards and engineering guidelines.

• Liaise with back-end engineers to define clear data contracts, integrate RESTful APIs, and ensure smooth, end-to-end system functionality.

• Proactively diagnose and resolve UI issues, defects, and incidents to maintain the reliability and user-centricity of digital platforms.

📝 Enhancement Note: The responsibilities emphasize not just building interfaces but ensuring their quality, performance, and maintainability through testing, optimization, and adherence to architectural strategies like micro-frontends. The collaboration aspect highlights the need for strong communication skills beyond just technical execution.

🎓 Skills & Qualifications

Education: While no specific degree is listed, a strong academic background or equivalent practical experience in Computer Science, Software Engineering, or a related field is implied by the technical requirements.

Experience: 2-5 years of hands-on experience in front-end development, with a significant portion focused on building complex user interfaces.

Required Skills:

• Extensive hands-on experience with modern front-end technologies, including HTML5, CSS3 (with pre-processors like SCSS), JavaScript (ES6+), TypeScript, and a deep understanding of the Angular framework.

• Proficiency with state management libraries, package managers (npm/yarn), and bundling tools such as Webpack or Vite.

• High proficiency in automated testing methodologies, including writing unit, integration, and end-to-end tests, with practical application of Test-Driven Development (TDD) and Behavior-Driven Development (BDD) practices.

• Demonstrated experience in building and maintaining responsive, accessible (WCAG compliant), secure, and high-performing user interfaces that function consistently across diverse browsers and devices, utilizing component-based and micro-frontend architectural patterns.

• Comfortable and experienced with Git and modern development workflows, including branching strategies (e.g., Gitflow), CI/CD pipelines, feature toggling, semantic versioning, and semantic commits.

• Solid understanding of RESTful APIs, with practical experience integrating front-end applications with back-end services, and contributing to the definition of clear and effective data contracts.

• Experience working with design systems and tools like Figma for design handoffs and Storybook for component development and documentation, ensuring visual consistency and quality.

• Strong analytical and problem-solving skills, with the ability to dissect complex challenges and devise elegant, efficient front-end solutions.

• Excellent communication and collaboration skills, with proven ability to work effectively within cross-functional teams comprising designers, engineers, and product professionals.

Preferred Skills:

• Familiarity with Node.js for build processes or server-side rendering.

• Experience with any other modern JavaScript frameworks (e.g., React, Vue.js) for broader context.

• Knowledge of performance optimization techniques beyond basic bundling, such as lazy loading, code splitting, and image optimization.

• Understanding of security best practices for front-end applications, including OWASP Top 10 relevant to the client-side.

• Experience with cloud platforms (e.g., AWS, Azure) and their implications for front-end deployment.

📝 Enhancement Note: The "About You" section details a comprehensive set of required skills that indicate a need for a seasoned front-end engineer capable of independent work and contributing to architectural decisions. The emphasis on testing, accessibility, and security suggests a mature development process.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrate successful projects showcasing the development of complex, responsive, and accessible user interfaces, preferably using Angular.

• Provide examples of front-end architecture patterns implemented, such as component-based design or micro-frontends, illustrating scalability and maintainability.

• Include case studies or project descriptions that highlight the application of automated testing strategies (unit, integration, E2E) and their impact on code quality.

• Showcase contributions to or development of design systems and component libraries, demonstrating an understanding of consistency and reusability.

Process Documentation:

• Examples of how you have contributed to or documented front-end development workflows, including CI/CD integration, branching strategies, and testing procedures.

• Evidence of participation in code reviews, demonstrating an ability to provide constructive feedback and uphold coding standards.

• Descriptions of how you have optimized front-end performance, including techniques used for load time reduction and efficient code delivery.

• Demonstrate experience with accessibility best practices and how they were incorporated into development processes.

📝 Enhancement Note: For a UI Engineer role, a portfolio is crucial. It should go beyond just showcasing visual results and delve into the technical implementation, architectural choices, testing strategies, and process contributions that demonstrate engineering rigor.

💵 Compensation & Benefits

Salary Range: £55,000 – £65,000 per annum.

Benefits:

• Annual Leave: 26 days plus 8 statutory bank holidays, with options to purchase additional leave and swap bank holidays.

• Pension Scheme: Generous double-matching scheme, contributing 2x the employee's contribution up to 6% of salary (total 18% contribution).

• Life Insurance: 10x basic salary cover.

• Private Medical Insurance: Employer contributions towards the cost.

• Flexible Benefits: Includes a cycle scheme, share incentive plan, and technology schemes.

• Health & Wellbeing: Access to digital GP services (video consultations, repeat prescriptions) and a dedicated wellbeing app.

• Family Support: Access to Work + Family Space, offering resources for childcare and eldercare, including paid emergency services.

Working Hours: Full-time, with an implied standard working week of approximately 40 hours, though specific daily hours are not detailed. The hybrid nature suggests flexibility around core working times.

📝 Enhancement Note: The salary range is explicitly stated. The benefits package is comprehensive, with a strong emphasis on work-life balance, health, and financial security, which are attractive to mid-level professionals. The mention of a quarterly in-person planning event at one of their office locations should be factored into the hybrid working arrangement for planning purposes.

🎯 Team & Company Context

🏢 Company Culture

Industry: Energy (specifically, the energy transition for electricity and gas networks). National Grid plays a critical role in powering society.

Company Size: Large enterprise, indicated by the global presence and extensive operations of National Grid.

Founded: National Grid was formed in 1990, but its roots and operational history in the energy sector are much longer, signifying a stable and established organization with a deep understanding of critical infrastructure.

Team Structure:

• The UI Engineer will be part of the Technology team, reporting to a Lead UI Engineer. This suggests a structured engineering department with clear leadership and specialization.

• The role involves close collaboration with UX Designers, Product Managers, and other Software Engineers, indicating a cross-functional team environment focused on product development.

Methodology:

• Data-Driven Development: Implied by the need for performance optimization, analytics, and user-centric design, suggesting decisions are informed by data and user feedback.

• Agile Development: Explicitly mentioned, with frameworks like Scrum or Kanban, indicating iterative development, regular ceremonies, and a focus on continuous improvement.

• Best Practices: The role requires adherence to modern front-end engineering standards, including secure coding, accessibility, and automated testing, suggesting a commitment to high-quality software delivery.

Company Website: https://www.nationalgrid.com/ (or more specifically for ESO: https://www.nationalgrideso.com/)

📝 Enhancement Note: National Grid's position in the energy sector means the technology team supports critical national infrastructure, implying a focus on reliability, security, and scalability. The culture likely values stability, long-term planning, and a commitment to public service, alongside modern engineering practices.

📈 Career & Growth Analysis

Operations Career Level: Mid-Level Front-End Engineer. This role is for an individual contributor with 2-5 years of experience, expected to be proficient in core front-end technologies and capable of independent task execution, with some influence on technical best practices and mentoring of more junior colleagues.

Reporting Structure: Reports to a Lead UI Engineer, indicating a clear line of management and technical mentorship. Works within cross-functional product teams.

Operations Impact: The UI Engineer's work directly impacts the user experience of National Grid's digital platforms, which serve millions of customers and internal stakeholders. Enhancing these interfaces contributes to customer satisfaction, operational efficiency, and the company's broader digital transformation goals, particularly in supporting the energy transition.

Growth Opportunities:

• Technical Specialization: Deepen expertise in Angular, micro-frontend architectures, performance optimization, or accessibility standards.

• Leadership Development: Progress to a Senior UI Engineer or Lead UI Engineer role, taking on more architectural responsibilities and mentoring opportunities.

• Cross-Functional Skill Development: Gain exposure to back-end integration, DevOps practices (CI/CD), and product management principles through collaboration.

• Industry Knowledge: Develop a strong understanding of the energy sector and its unique technology challenges.

📝 Enhancement Note: The growth path for a UI Engineer at a large enterprise like National Grid typically involves deepening technical expertise, moving into senior or lead roles, or potentially transitioning into related areas like architecture or management. The emphasis on collaboration and best practices suggests opportunities for leadership in technical areas.

🌐 Work Environment

Office Type: Hybrid working model, with options to work from National Grid's offices in Warwick, Bristol, or Cardiff. A London co-working space is also available. This offers flexibility while maintaining in-person collaboration.

Office Location(s):

• Warwick, England, CV34 6DA

• Bristol, England

• Cardiff, Wales

Workspace Context:

• The hybrid model supports a balance between focused remote work and collaborative in-office sessions.

• Expectation of access to modern development tools and technologies necessary for front-end engineering.

• Opportunities for team interaction during Agile ceremonies, planning events, and ad-hoc collaboration with designers, product managers, and fellow engineers.

• Quarterly 2-3 day in-person planning events at office locations will foster team cohesion and strategic alignment.

Work Schedule: Full-time. While specific daily hours are not stated, the hybrid arrangement implies flexibility to manage personal and professional commitments, within the context of team availability and project needs.

📝 Enhancement Note: The hybrid approach with multiple office locations and a co-working space offers significant flexibility. The quarterly in-person events are a key component for maintaining team connection and strategic alignment, a common practice in large organizations embracing hybrid work.

📄 Application & Portfolio Review Process

Interview Process:

• Application Submission: Submit resume and cover letter (optional but recommended) through the National Grid careers portal.

• Initial Screening: A recruiter will review applications to assess alignment with core requirements.

• Technical Assessment: This may involve a coding challenge, a take-home assignment, or a live coding session focusing on Angular, TypeScript, and problem-solving skills.

• Hiring Manager/Team Interview: A discussion covering technical depth, problem-solving approaches, experience with specific technologies (Angular, testing, APIs), and behavioral questions related to teamwork and Agile methodologies.

• Portfolio Review: Candidates will likely be asked to present and discuss their portfolio, detailing specific projects, their role, technical challenges, and solutions.

• Final Interview: Potentially with a senior leader or a panel to assess cultural fit, strategic thinking, and overall suitability for the role and company.

Portfolio Review Tips:

• Curate Select Projects: Choose 2-3 projects that best demonstrate your Angular expertise, problem-solving abilities, and experience with responsive, accessible, and performant UI development.

• Highlight Technical Depth: For each project, clearly articulate the technical challenges faced, the specific Angular features or patterns used, the testing strategies implemented, and how you integrated with back-end APIs.

• Showcase Process Contributions: If possible, include examples of your involvement in CI/CD, code reviews, or contributions to design systems/component libraries.

• Quantify Impact: Where possible, quantify the impact of your work (e.g., performance improvements, reduction in bugs, user adoption rates).

• Prepare for Questions: Be ready to discuss your decision-making process, trade-offs considered, and how you would approach similar challenges in the future.

Challenge Preparation:

• Angular Fundamentals: Brush up on core Angular concepts, component lifecycle, data binding, services, modules, routing, and state management.

• TypeScript & RxJS: Ensure proficiency in TypeScript features and reactive programming with RxJS, as these are integral to modern Angular development.

• Testing Frameworks: Familiarize yourself with Jasmine/Karma for unit testing and Protractor/Cypress for end-to-end testing within an Angular context.

• API Integration: Practice scenarios involving fetching data, handling asynchronous operations, and error management when integrating with RESTful APIs.

• Problem-Solving Scenarios: Prepare for questions that require you to break down a UI problem, consider different approaches, and articulate your solution clearly.

📝 Enhancement Note: The interview process for a UI Engineer at a large company like National Grid will likely be rigorous, focusing on both technical proficiency and the ability to integrate into established processes and teams. A strong portfolio demonstrating practical application of skills is paramount.

🛠 Tools & Technology Stack

Primary Tools:

• Angular: The core framework for building front-end applications.

• TypeScript: The primary language for development, offering static typing and enhanced code quality.

• HTML5 & SCSS (CSS Pre-processors): For structuring and styling user interfaces.

• Node.js: Likely used for build processes, local development environments, or potentially server-side rendering.

• Webpack/Vite: Module bundlers essential for optimizing front-end assets.

Analytics & Reporting:

• Figma: For design handoffs, prototyping, and collaboration with UX designers.

• Storybook: For developing, documenting, and testing UI components in isolation.

• Analytics Tools (e.g., Google Analytics, Adobe Analytics, internal tools): To monitor user behavior, performance, and engagement.

CRM & Automation:

• Git: Version control system for code management and collaboration.

• CI/CD Tools (e.g., Jenkins, Azure DevOps, GitLab CI): For automated build, test, and deployment pipelines.

• RESTful APIs: The standard for communication between front-end and back-end services.

📝 Enhancement Note: The technology stack is heavily focused on the Angular ecosystem and modern front-end development practices, with an emphasis on tooling for efficient development, testing, and deployment.

👥 Team Culture & Values

Operations Values:

• Connectivity & Reliability: As a core energy provider, National Grid values systems that keep people connected and society moving, emphasizing robust and dependable software solutions.

• Energy Transition: A forward-looking value, encouraging innovation and development of solutions that support sustainability and the evolving energy landscape.

• Customer Focus: Building intuitive, user-centric interfaces that enhance the customer experience.

• Best Practice & Excellence: A commitment to high standards in code quality, security, accessibility, and performance.

• Collaboration & Continuous Improvement: Fostering a team environment where knowledge is shared, feedback is given constructively, and processes are continually refined.

Collaboration Style:

• Cross-functional Integration: Working seamlessly with UX Designers, Product Managers, and Back-end Engineers to deliver cohesive digital products.

• Agile & Iterative: Engaging actively in Agile ceremonies, embracing iterative development, and providing feedback throughout the development lifecycle.

• Knowledge Sharing: Encouraging a culture where team members share expertise through code reviews, pair programming, and internal discussions.

• Open Communication: Maintaining clear and open communication channels to resolve issues, clarify requirements, and ensure alignment.

📝 Enhancement Note: The culture at National Grid, particularly within its technology teams, likely blends the stability and responsibility of a critical infrastructure provider with the dynamism of modern software development practices. A strong emphasis on teamwork and continuous improvement is expected.

⚡ Challenges & Growth Opportunities

Challenges:

• Legacy System Integration: Potentially integrating modern front-end applications with older back-end systems, requiring careful API design and data contract management.

• Scalability & Performance: Ensuring that user interfaces perform optimally for millions of users across diverse devices and network conditions.

• Maintaining Consistency: Upholding a consistent look, feel, and user experience across a wide range of digital products and platforms.

• Rapid Technological Evolution: Staying abreast of fast-paced changes in front-end technologies and best practices while working within established corporate structures.

Learning & Development Opportunities:

• Deep Dive into Angular Ecosystem: Advanced training and development in Angular, RxJS, NgRx, and related libraries.

• Micro-frontend Architecture Mastery: Gaining in-depth experience with micro-frontend strategies and implementation patterns.

• Accessibility & Performance Auditing: Developing expertise in performing detailed accessibility and performance audits and implementing solutions.

• DevOps & CI/CD: Expanding knowledge in automated build, test, and deployment processes.

• Mentorship Programs: Opportunities to be mentored by senior engineers or to mentor junior developers.

📝 Enhancement Note: The challenges are typical for large organizations with significant digital footprints, especially in regulated industries. The growth opportunities are well-defined for a front-end engineer aiming for technical leadership or specialized expertise.

💡 Interview Preparation

Strategy Questions:

• "Describe a complex UI challenge you faced in an Angular project and how you overcame it. What was your process for debugging and problem-solving?" (Focus on systematic approach, debugging tools, and root cause analysis.)

• "How do you ensure your front-end code is scalable, maintainable, and adheres to best practices like SOLID principles or DRY? Provide examples from your experience." (Discuss code structure, modularity, reusability, and architectural patterns.)

Company & Culture Questions:

• "Why are you interested in working for National Grid, and what excites you about supporting the energy transition through technology?" (Research National Grid's mission, values, and recent initiatives in the energy sector.)

• "How do you approach collaboration within a cross-functional team, especially when working with UX designers and back-end developers?" (Highlight communication skills, empathy, and experience with Agile ceremonies.)

Portfolio Presentation Strategy:

• Structure Your Narrative: For each project, clearly state the problem, your role, the technologies used, the challenges, your specific contributions, the solution, and the outcome/impact.

• Focus on Angular & Core Skills: Emphasize your Angular expertise, along with your proficiency in TypeScript, testing, API integration, and responsive/accessible design.

• Showcase Process & Best Practices: Highlight how you applied testing, followed coding standards, worked with design systems, or contributed to CI/CD.

• Be Prepared for Technical Deep Dives: Anticipate questions about specific code snippets, architectural decisions, or trade-offs made during development.

• Connect to Role Requirements: Tailor your presentation to align with the key responsibilities and qualifications outlined in the job description.

📝 Enhancement Note: Interview preparation should focus on demonstrating not just technical skill but also problem-solving methodology, collaborative ability, and a genuine understanding of National Grid's mission and challenges within the energy sector.

📌 Application Steps

To apply for this UI Engineer position:

• Submit your application through the National Grid careers portal at https://jobs-ats.nationalgrid.com/.

• Tailor your Resume: Ensure your resume highlights your experience with Angular, TypeScript, modern front-end development, automated testing, and API integrations. Quantify achievements and responsibilities where possible, using keywords from the job description.

• Prepare Your Portfolio: Select 2-3 key projects that best showcase your UI engineering skills. Be ready to discuss your role, technical challenges, solutions, and the outcomes. Focus on projects demonstrating Angular expertise, responsive design, accessibility, and performance optimization.

• Research National Grid: Understand the company's role in the energy transition, its values, and its technology initiatives. This will help you answer company-specific questions and demonstrate genuine interest.

• Practice Interview Questions: Rehearse answers to common technical, behavioral, and situational questions, particularly those related to Angular development, Agile methodologies, and problem-solving. Be prepared to present your portfolio and discuss your technical decisions.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.