Senior UI / React Engineer (TypeScript) - London, UK - Fulltime - Hybrid

📍 Job Overview

Job Title: Senior UI / React Engineer (TypeScript)

Company: Capgemini

Location: London, UK

Job Type: Fulltime

Category: Software Engineering / Frontend Development

Date Posted: 2026-05-08

Experience Level: Senior (5-10 years implied)

Remote Status: Hybrid

🚀 Role Summary

• Spearhead the development of high-quality, type-safe user interfaces using React and TypeScript.

• Take full technical ownership of features, ensuring robust and maintainable code delivery.

• Drive cross-functional collaboration with backend engineers, UX/UI designers, and business analysts.

• Champion best practices in code quality, testing, and efficient development methodologies.

• Leverage AI tools to enhance productivity while maintaining high development standards.

📝 Enhancement Note: The role emphasizes a senior-level contribution, requiring an engineer who can operate with significant autonomy and proactively drive technical direction. The mention of "Banking domain" suggests a need for understanding financial sector specific requirements and compliance.

📈 Primary Responsibilities

• Develop and maintain complex, reusable UI components using React and TypeScript, adhering to clean code principles.

• Architect and implement end-to-end features, from conception through to deployment, ensuring technical excellence.

• Collaborate closely with UX/UI designers to translate wireframes and mockups into functional, high-fidelity user interfaces.

• Partner with backend engineers to define and consume APIs, ensuring seamless integration and data flow.

• Actively participate in code reviews, providing constructive feedback to peers and upholding code quality standards.

• Contribute to the continuous improvement of development processes, tooling, and team methodologies.

• Take technical ownership of feature development, proactively identifying and mitigating risks.

• Engage in discussions regarding the testing pyramid and implement effective testing strategies to ensure application quality.

• Utilize AI tools to streamline development workflows, enhance productivity, and explore innovative solutions.

• Proactively refactor existing codebases to improve performance, maintainability, and scalability.

📝 Enhancement Note: The responsibilities highlight a blend of hands-on development, technical leadership, and collaborative problem-solving. The emphasis on "ownership," "feedback," and "constructive challenges" indicates a culture that values proactive contribution and continuous improvement within the engineering team.

🎓 Skills & Qualifications

Education: While not explicitly stated, a Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field is typically expected for a Senior Engineer role. Equivalent practical experience will also be considered.

Experience: A minimum of 5-10 years of professional experience in frontend development, with a strong focus on React and TypeScript, is implied for a Senior Engineer position. Experience within the banking or financial services domain is highly desirable.

Required Skills:

• Proven expertise as a Senior UI Engineer with a strong command of React and TypeScript.

• Deep understanding of modern JavaScript (ES6+) and its ecosystem.

• Proficiency in building scalable, maintainable, and performant frontend applications.

• Experience with state management libraries (e.g., Redux, Zustand, Context API).

• Solid understanding of the testing pyramid and experience with unit, integration, and end-to-end testing frameworks (e.g., Jest, React Testing Library, Cypress).

• Ability to write clean, readable, and typesafe code.

• Experience with version control systems, particularly Git.

• Strong problem-solving skills and the ability to work independently without extensive guidance.

• Excellent communication and interpersonal skills, with the ability to collaborate effectively with cross-functional teams.

Preferred Skills:

• Experience in the Banking or Financial Services domain.

• Familiarity with CI/CD pipelines and deployment strategies.

• Knowledge of containerization technologies like Docker.

• Experience with server-side rendering (SSR) or static site generation (SSG) frameworks (e.g., Next.js).

• Understanding of UI/UX principles and best practices.

• Experience with performance optimization techniques for web applications.

• Familiarity with Agile development methodologies.

• Experience integrating and utilizing AI tools in the development workflow.

📝 Enhancement Note: The "Senior" title and emphasis on ownership suggest that candidates should demonstrate leadership potential, a proactive approach to problem-solving, and a deep understanding of software engineering principles beyond just coding. Experience in the banking domain is a significant differentiator.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrable projects showcasing expertise in React and TypeScript, highlighting complex UI implementations.

• Evidence of taking technical ownership of features or projects from inception to completion.

• Case studies detailing problem-solving approaches, technical challenges overcome, and solutions implemented.

• Examples of clean, maintainable, and well-documented code, preferably hosted on a platform like GitHub.

• Projects that illustrate an understanding of state management, API integration, and asynchronous operations.

Process Documentation:

• Examples of how you've contributed to or improved development workflows, testing strategies, or code review processes.

• Documentation of technical decisions, architectural choices, and their rationale.

• Any personal or professional experience in documenting processes for team knowledge sharing or onboarding.

• Evidence of iterating on solutions based on feedback or evolving requirements.

📝 Enhancement Note: For a senior role, a portfolio should not just showcase technical skills but also demonstrate ownership, problem-solving capabilities, and an understanding of software development lifecycle best practices. The ability to articulate the "why" behind technical decisions and process improvements is crucial.

💵 Compensation & Benefits

Salary Range: Based on typical senior-level React/TypeScript engineer salaries in London, UK, and Capgemini's general compensation structure for consulting and technology roles, an estimated annual salary range would be between £70,000 and £100,000. This range can vary based on the candidate's specific experience, depth of domain knowledge (especially in banking), and negotiation.

Benefits:

• Comprehensive Wellbeing Support programs.

• Access to trained 'Mental Health Champions' across business areas.

• Subscriptions to wellbeing applications such as Thrive and Peppy.

• Extensive Training and Development Opportunities.

• Access to a vast library of over 250,000 courses.

• Opportunities to pursue external certifications from leading providers like AWS, Microsoft, Harvard ManageMentor, and Cybersecurity qualifications.

• Hybrid working model offering flexibility between office, client sites, and home.

• Pension scheme.

• Paid time off and holidays.

• Potential for performance-based bonuses.

• Opportunities for career advancement within a global organization.

Working Hours: Standard full-time hours are expected, likely around 35-40 hours per week. The hybrid model allows for some flexibility in scheduling, with the understanding that 100% remote work is not an option.

📝 Enhancement Note: The salary estimate is based on industry benchmarks for senior frontend engineers in London. Capgemini, as a large global consultancy, typically offers a robust benefits package, with a strong emphasis on employee wellbeing and continuous learning, as highlighted in the job description.

🎯 Team & Company Context

🏢 Company Culture

Industry: Technology Consulting / IT Services. Capgemini operates at the intersection of technology and business, helping clients across various sectors transform their operations and leverage digital solutions. This specific role is within a project focused on the Banking domain, indicating a strong emphasis on financial services.

Company Size: Capgemini is a global leader with approximately 420,000 employees worldwide, operating in over 50 countries. This large scale offers significant opportunities for internal mobility, diverse project exposure, and access to a vast network of professionals.

Founded: Capgemini has a heritage of nearly 60 years. This long history suggests a stable, established organization with deep industry experience and a proven track record in delivering complex transformation projects.

Team Structure:

• The UI engineering team is likely part of a larger development or digital transformation practice within Capgemini.

• The team will comprise individuals with various specializations, including backend engineers, UX/UI designers, business analysts, and other frontend developers.

• Reporting structure will likely involve a technical lead or a project/delivery manager, with potential for matrixed reporting within client engagements.

Methodology:

• Capgemini often employs Agile methodologies (Scrum, Kanban) for project delivery, emphasizing iterative development, collaboration, and rapid feedback loops.

• Data analysis and insights are crucial for understanding client needs and measuring project impact.

• Workflow planning and optimization are fundamental to consulting, aiming to deliver efficient and effective solutions.

• Automation and efficiency practices are key to consultancy, enabling scalability and competitive service delivery.

Company Website: www.capgemini.com

📝 Enhancement Note: Capgemini's culture is characterized by its global reach, commitment to ethical business practices, and focus on innovation and client transformation. The emphasis on "Make It Real" suggests a practical, results-oriented approach. The "Disability Confident Employer" status highlights a commitment to diversity and inclusion.

📈 Career & Growth Analysis

Operations Career Level: This role is classified as "Senior UI / React Engineer (TypeScript)." At Capgemini, this level typically implies an individual contributor role with significant technical authority and responsibility for feature development and technical guidance. It's a position where one is expected to mentor junior engineers, influence technical decisions, and consistently deliver high-quality work with minimal supervision.

Reporting Structure: The Senior Engineer will likely report to a Technical Lead, a Development Manager, or a Project Manager. Within client-specific projects, there might also be a direct reporting line to the client's technical stakeholders. The role requires effective communication across multiple levels and functions.

Operations Impact: While this is not a traditional "Revenue Operations" role, a Senior UI Engineer has a significant impact on the "operations" of client businesses by building the user-facing interfaces through which clients interact with their digital products and services. High-quality, efficient, and user-friendly interfaces directly contribute to client satisfaction, operational efficiency, and ultimately, business success. The banking domain context further emphasizes the critical nature of these interfaces for financial transactions and customer engagement.

Growth Opportunities:

• Technical Specialization: Deepen expertise in React, TypeScript, and related frontend technologies, potentially specializing in areas like performance optimization, accessibility, or specific architectural patterns.

• Leadership Development: Progress into roles such as Tech Lead, Architect, or Engineering Manager, taking on more responsibility for team leadership, project strategy, and technical direction.

• Cross-Functional Skills: Develop skills in areas like DevOps, cloud architecture, or specific industry domains (e.g., further specialization in Banking).

• Consulting Skills: Enhance client-facing skills, project management capabilities, and business acumen to transition into more client-facing or advisory roles within Capgemini.

• Mentorship: Actively mentor junior engineers, contributing to their growth and development while solidifying leadership capabilities.

📝 Enhancement Note: Capgemini's "learning for life" mindset provides abundant opportunities for continuous professional development. The career path for a Senior Engineer is not limited to pure technical progression but can also branch into leadership, architecture, or specialized consulting roles, leveraging the broad project exposure typical of a large consultancy.

🌐 Work Environment

Office Type: The role is designated as "Hybrid," meaning work will be conducted from a blend of Capgemini offices, client sites, and the employee's home. This arrangement is designed to balance the need for in-person collaboration and client engagement with the flexibility of remote work.

Office Location(s): The primary location is London, UK. Capgemini has multiple offices in London, and client sites can vary across the city and potentially surrounding areas. Employees will likely be assigned to specific Capgemini offices or client locations based on project needs.

Workspace Context:

• Collaborative Environment: Capgemini offices are designed to foster collaboration, with meeting rooms, open-plan workspaces, and dedicated areas for team interaction. Client sites will offer environments tailored to the specific client's operational setup.

• Tools and Technology: Access to standard corporate IT infrastructure, development tools, and potentially specialized software required for client projects. The expectation is that engineers will be proficient in using their development tools effectively in various work settings.

• Team Interaction: Opportunities for regular team meetings, stand-ups, and informal discussions, both in-person and virtually, to ensure alignment and knowledge sharing.

Work Schedule: The hybrid model implies a structured work schedule with flexibility. While full-time hours are expected, the distribution between office, client, and home will be project-dependent and may involve some degree of personal scheduling flexibility, provided business needs and client requirements are met. A commitment to being present in the office or at client sites for specific days or events is expected.

📝 Enhancement Note: The hybrid nature of the role requires adaptability and strong self-management skills. The emphasis on client site work indicates that client-facing presence and engagement are key components of the role, typical for a consulting environment.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A preliminary call with HR or a recruiter to assess basic qualifications, cultural fit, and interest in the role and Capgemini.

• Technical Interview(s): One or more rounds focused on assessing technical skills in React, TypeScript, frontend architecture, problem-solving, and potentially domain knowledge (Banking). This may include live coding exercises, system design discussions, or scenario-based questions.

• Portfolio Review: A dedicated session where candidates present selected projects from their portfolio, explaining their technical contributions, design choices, and the impact of their work. This is a crucial part of evaluating a senior candidate.

• Hiring Manager / Team Lead Interview: A discussion to delve deeper into experience, leadership potential, collaboration style, and alignment with team and company culture.

• Final Interview: Potentially with a senior leader or director to finalize the decision and discuss career progression.

Portfolio Review Tips:

• Curate Selectively: Choose 2-3 of your strongest projects that best showcase your React, TypeScript, and problem-solving skills, particularly those relevant to complex UI development or the banking domain.

• Structure Your Narrative: For each project, clearly articulate the problem statement, your role and responsibilities, the technical challenges faced, the solutions you implemented (highlighting specific React/TypeScript patterns), and the measurable outcomes or impact.

• Code Quality Focus: Be prepared to discuss specific code snippets, explain your choices regarding state management, component design, testing strategy, and any use of AI tools.

• Demonstrate Ownership: Emphasize instances where you took technical leadership, made critical decisions, or mentored others.

• Prepare for Questions: Anticipate questions about your development process, how you handle feedback, your approach to testing, and your understanding of best practices.

Challenge Preparation:

• Coding Challenges: Practice common algorithms and data structure problems, as well as React-specific coding challenges. Focus on writing clean, efficient, and well-tested code.

• System Design: Be prepared to discuss how you would design scalable and maintainable UI architectures for complex applications, considering factors like performance, security, and maintainability.

• Behavioral Questions: Prepare examples using the STAR method (Situation, Task, Action, Result) to illustrate your experience with teamwork, problem-solving, handling conflict, and taking initiative.

• Domain Awareness: If possible, research common UI/UX challenges and technological trends within the banking sector to inform your answers.

📝 Enhancement Note: The interview process at a large consultancy like Capgemini is typically structured and thorough. A strong portfolio that clearly demonstrates senior-level technical competency, ownership, and problem-solving skills, coupled with excellent communication, is essential for success.

🛠 Tools & Technology Stack

Primary Tools:

• Frontend Framework: React

• Language: TypeScript

• State Management: Redux, Zustand, Context API (or similar)

• Styling: CSS Modules, Styled Components, Sass, Tailwind CSS (or similar)

• Build Tools: Webpack, Vite (or similar)

• Version Control: Git (GitHub, GitLab, Bitbucket)

• Package Managers: npm, yarn

Analytics & Reporting:

• Browser Developer Tools: Essential for debugging and performance analysis.

• Performance Monitoring Tools: Lighthouse, WebPageTest, or integrated APM tools.

• Analytics Platforms: Google Analytics, Adobe Analytics (if integrated into client solutions).

• Dashboarding Tools: Potentially for internal team reporting or client-facing dashboards (e.g., Tableau, Power BI if the UI interacts with them).

CRM & Automation:

• While not directly CRM focused, understanding how frontend applications integrate with backend systems, APIs, and potentially data platforms that feed CRM or business intelligence tools is important.

• Experience with CI/CD tools (e.g., Jenkins, GitLab CI, GitHub Actions) for automated testing and deployment.

📝 Enhancement Note: Proficiency in React and TypeScript is non-negotiable. The role will likely involve working within established project stacks, so flexibility and the ability to quickly adapt to different tools and technologies within the frontend ecosystem are also key. Familiarity with modern development workflows, including CI/CD and automated testing, is expected.

👥 Team Culture & Values

Operations Values:

• Innovation & Transformation: A drive to reimagine possibilities through technology and deliver tangible business value.

• Ethical Business: A commitment to making ethical choices and building a future that can be proud of, as evidenced by their "World's Most Ethical Companies" recognition.

• Client Focus: Dedication to growing clients' businesses and helping them achieve their strategic objectives.

• Collaboration & Knowledge Sharing: A culture of learning from each other, sharing expertise, and working collectively towards common goals.

• Wellbeing: Prioritizing employee wellbeing, fostering a supportive environment, and providing resources to promote mental and physical health.

• Efficiency & Pragmatism: A focus on practical, streamlined solutions rather than overengineering, and an iterative approach to development.

Collaboration Style:

• Cross-functional Integration: Expectation to work seamlessly with backend engineers, designers, business analysts, and other stakeholders, fostering open communication and shared understanding.

• Constructive Challenge: A culture where ideas and approaches are challenged constructively and objectively to achieve better outcomes.

• Feedback-Driven: Openness to giving and receiving feedback as a mechanism for continuous improvement and learning.

• Team-Oriented Learning: A "learning for life" mindset where team members actively share knowledge, participate in think tanks, and contribute to a collective growth environment.

📝 Enhancement Note: Capgemini's values are deeply embedded in its operations, emphasizing integrity, client success, and employee development. The team culture will reflect these values, encouraging proactive contribution, continuous learning, and a collaborative spirit, especially within client-facing project teams.

⚡ Challenges & Growth Opportunities

Challenges:

• Complex Client Requirements: Navigating diverse and sometimes demanding client needs, particularly within the regulated banking sector, which requires adherence to strict security and compliance standards.

• Hybrid Work Management: Effectively balancing productivity and collaboration across different work locations (office, client site, home) and ensuring seamless integration with team members in various settings.

• Technical Debt Management: Proactively addressing and refactoring existing code to prevent technical debt from accumulating, ensuring long-term maintainability and scalability.

• Rapid Technological Evolution: Staying abreast of the fast-paced changes in frontend technologies, frameworks, and best practices, and applying them effectively to client projects.

• Stakeholder Management: Effectively communicating technical concepts, progress, and challenges to both technical and non-technical stakeholders, ensuring alignment and managing expectations.

Learning & Development Opportunities:

• Advanced Skill Development: Access to Capgemini's extensive learning resources, including 250,000 courses, to deepen expertise in React, TypeScript, modern frontend architecture, and emerging technologies.

• Industry Certifications: Opportunities to pursue and obtain certifications from leading technology providers (AWS, Microsoft, etc.), enhancing professional credentials.

• Domain Expertise: Gaining in-depth knowledge of the banking and financial services industry through project work, offering a specialized career path.

• Leadership & Mentorship: Opportunities to grow into leadership roles, mentor junior engineers, and contribute to architectural decisions, developing a comprehensive skill set.

• Innovation Exposure: Participation in think tanks, hackathons, and innovation initiatives that push the boundaries of technology application.

📝 Enhancement Note: The challenges presented are typical for a senior role in a large consultancy, requiring adaptability, strong problem-solving skills, and a commitment to continuous learning. Capgemini's investment in L&D is a significant advantage for professionals looking to grow their careers.

💡 Interview Preparation

Strategy Questions:

• Technical Strategy: "Describe a complex UI feature you owned from conception to deployment. What were the key technical decisions, trade-offs, and challenges in using React and TypeScript?" (Focus on demonstrating ownership, problem-solving, and rationale for technical choices).

• Collaboration & Feedback: "How do you approach constructive feedback from peers or designers? Can you provide an example where feedback significantly improved your work?" (Highlight openness to feedback and collaborative problem-solving).

• Problem-Solving: "Imagine you're tasked with improving the performance of a slow-loading React application. What steps would you take, and what tools would you use?" (Demonstrate systematic debugging and optimization approaches).

Company & Culture Questions:

• Capgemini's Values: "How do you see your personal values aligning with Capgemini's commitment to ethical business and client transformation?" (Research Capgemini's values and articulate genuine alignment).

• Team Dynamics: "Describe your ideal team environment for a hybrid work setup. How do you ensure effective communication and collaboration with remote and in-office team members?" (Focus on proactive communication and adaptability).

• Impact Measurement: "How do you measure the success of your UI development work beyond just code completion? What metrics are important to you and the business?" (Discuss user experience, performance, maintainability, and business impact).

Portfolio Presentation Strategy:

• Narrative Flow: Structure your presentation around the problem, your solution, and the outcome. Clearly articulate your specific contribution.

• Code Deep Dive: Be ready to walk through key code sections, explain architectural patterns (e.g., component composition, state management strategy), and justify your choices.

• Highlighting Seniority: Emphasize instances of technical leadership, decision-making, mentoring, and proactive problem-solving.

• Domain Relevance: If you have banking/finance projects, highlight them and discuss any specific challenges or requirements unique to that sector.

• Conciseness: Respect time limits and focus on the most impactful aspects of your projects.

📝 Enhancement Note: Interview preparation should focus on demonstrating not just technical proficiency but also a senior-level mindset: ownership, strategic thinking, collaborative problem-solving, and a clear understanding of how technical work contributes to business objectives.

📌 Application Steps

To apply for this Senior UI / React Engineer position:

• Submit your application through the provided link on the Capgemini careers website.

• Portfolio Customization: Ensure your resume and any accompanying portfolio links (e.g., GitHub) are up-to-date and highlight your strongest React and TypeScript projects. Tailor your portfolio presentation to emphasize ownership, technical depth, and problem-solving relevant to complex UI development.

• Resume Optimization: Clearly articulate your years of experience, specific contributions to projects, and proficiency in React, TypeScript, and related frontend technologies. Use keywords from the job description where appropriate and accurately reflect your achievements.

• Interview Preparation: Thoroughly review the interview tips and prepare specific examples using the STAR method for behavioral questions. Practice explaining your portfolio projects and be ready to discuss technical concepts and challenges in detail.

• Company Research: Familiarize yourself with Capgemini's mission, values, recent projects (especially in the financial services sector), and their approach to hybrid work and employee development. Understand their "Make It Real" philosophy.

⚠️ 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.