Senior Front-End Javascript Developer
Hybrid
London, United Kingdom
Full Time
22-04-2025
Job Specifications
About The Job Your Considering
We are seeking a highly skilled and experienced Senior / Lead Front-end JavaScript Developer to join our Experience Engineering team. In this role, you will lead the development of an impactful web application for a public sector programme, ensuring high performance, scalability, and maintainability. You will work closely with cross-functional teams to deliver engaging solutions that meet our client’s needs.
Your role
Provide technical leadership and mentorship to a team of developers, guiding them through best practices and ensuring high-quality code.
Design, develop, and maintain front-end components of web applications using HTML, CSS & JavaScript
Collaborate with architects and other developers to design robust, scalable, and secure architectures for new projects and enhancements to existing systems.
Lead and participate in agile development processes, including sprint planning, daily stand-ups, and retrospectives.
Conduct thorough code reviews to ensure code quality, performance, and adherence to best practices.
Continuously improve our teams’ development processes, tools, and techniques to enhance productivity and product quality.
Work closely with clients and internal teams to understand requirements, provide technical guidance, and deliver solutions that exceed expectations.
Stay up to date with the latest industry trends and technologies, and drive continuous learning and innovation within the team.
Your Skills And Experience
Proficiency in HTML5, CSS3, and JavaScript (ES6+).
Proven experience of Express.js and Nunjucks
Experience using the GOV.UK Design System
Familiarity with the GOV.UK CASA UI framework
Experience with MongoDB and NoSQL variants writing robust and scalable queries and operations
Experience with TypeScript and modern development tools and practices.
Knowledge of Cloud-Native development on the AWS Platform (IAM, SQS, S3, Secrets Management, KMS).
Familiarity with CI/CD pipelines and DevOps practices.
Experience with version control systems (Git).
Understanding of web standards, accessibility, performance and development best practice.
A track record in a lead or senior developer role, with experience of mentoring and guiding development teams.
Excellent problem-solving skills and the ability to think critically and creatively.
Your Security Clearance
To be successfully appointed to this role, it is a requirement to obtain Security Check (SC) clearance.
To obtain SC clearance, the successful applicant must have resided continuously within the United Kingdom for the last 5 years, along with other criteria and requirements.
Throughout the recruitment process, you will be asked questions about your security clearance eligibility such as, but not limited to, country of residence and nationality.
Some posts are restricted to sole UK Nationals for security reasons; therefore, you may be asked about your citizenship in the application process.
What does 'Get The Future You Want' mean to you?
You will be empowered to explore, innovate, and progress. You will benefit from Capgemini’s ‘learning for life’ mindset, meaning you will have countless training and development opportunities from thinktanks to hackathons, and access to 250,000 courses with numerous external certifications from AWS, Microsoft, Harvard ManageMentor, Cybersecurity qualifications and much more.
You’ll be bringing your unique skills and perspectives to the team, inspiring and taking inspiration from your teammates as you unlock value in everything you do. You’ll be joining a professional community of experts, who have got your back and will support you, every step of the way.
You will be encouraged to have a positive work-life balance. Our hybrid-first way of working means we embed hybrid working in all that we do and make flexible working arrangements the day-to-day reality for our people. All UK employees are eligible to request flexible working arrangements
Why you should consider Capgemini
Growing clients’ businesses while building a more sustainable, more inclusive future is a tough ask. When you join Capgemini, you’ll join a thriving company and become part of a diverse collective of free-thinkers, entrepreneurs and industry experts. We find new ways technology can help us reimagine what’s possible. It’s why, together, we seek out opportunities that will transform the world’s leading businesses, and it’s how you’ll gain the experiences and connections you need to shape your future. By learning from each other every day, sharing knowledge, and always pushing yourself to do better, you’ll build the skills you want. You’ll use your skills to help our clients leverage technology to innovate and grow their business. So, it might not always be easy, but making the world a better place rarely is.
About Capgemini
Capgemini is a global business and technology transformation partner, helping organisations to accelerate their dual transition to a digital and sustainable world, while creating tangible impact for enterprises and society. It is a responsible and diverse group of 340,000 team members in more than 50 countries. With its strong over 55-year heritage, Capgemini is trusted by its clients to unlock the value of technology to address the entire breadth of their business needs. It delivers end-to-end services and solutions leveraging strengths from strategy and design to engineering, all fuelled by its market leading capabilities in AI, generative AI, cloud and data, combined with its deep industry expertise and partner ecosystem. The Group reported 2024 global revenues of €22.1 billion.
Get The Future You Want | www.capgemini.com
Skills (competencies)
Verbal Communication
JavaScript
Advanced JavaScript (ES2015)
About the Company
Capgemini is a global business and technology transformation partner, helping organizations to accelerate their dual transition to a digital and sustainable world, while creating tangible impact for enterprises and society. It is a responsible and diverse group of 340,000 team members in more than 50 countries. With its strong over 55-year heritage, Capgemini is trusted by its clients to unlock the value of technology to address the entire breadth of their business needs. It delivers end-to-end services and solutions leverag... Know more
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