Senior Full Stack Engineer - Team Web

Salary: £62,000 - 102,000 per year

Requirements:

• 8+ years of experience in full stack development, with expertise in JavaScript, HTML, and CSS.
• Expert in front-end frameworks such as React, Next.js, and Tailwind.
• Experience with CMS platforms such as Contentful and Sanity, and marketing tools such as Google Tag Manager and Marketo.
• Experience with CI/CD tools such as CircleCI to streamline and automate development workflows.
• Familiarity with infrastructure as code tools such as Terraform, and cloud platforms like AWS, Vercel, CloudFront, and S3.
• Experience with A/B testing and familiarity with analytics tools to drive data-informed design and development decisions.
• Knowledge of performance optimization techniques and best practices for fast-loading, responsive websites.
• Experience writing tests for front-end components, with familiarity in testing frameworks such as Jest, Mocha, and Cypress.
• Strong problem-solving skills and the ability to work independently and as part of a team.
• Bachelors degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.

Responsibilities:

• Design, build, and maintain end-to-end web solutions, from modern UIs to backend services, APIs, and infrastructure.
• Collaborate with design, brand, marketing, and content teams to deliver seamless, performant experiences across web and mobile.
• Develop backend logic and APIs, manage data flows, and implement systems that integrate with third-party platforms.
• Optimize website performance by applying best practices in front-end development, including lazy loading and efficient asset management.
• Set up and manage infrastructure using tools like Vercel, AWS, CloudFront, Terraform, and CI/CD pipelines such as CircleCI.
• Implement and maintain web analytics, and support A/B testing for data-driven decisions.
• Stay current with emerging technologies and trends to continually improve our development processes and user experience.
• Be comfortable writing backend software and unblock yourself end to end.
• Build using the best tools in the industry, including AI-powered developer tools that remove friction and help you focus on meaningful problems.

Technologies:

• AI
• AWS
• Backend
• CI/CD
• Cloud
• CMS
• CSS
• Cypress
• Support
• JavaScript
• Jest
• Marketing
• Mocha
• Mobile
• React
• Terraform
• Web
• UX UI Design
• Windows
• Fullstack

More:

We are Fin, the AI Customer Agent company on a mission to help businesses provide perfect customer experiences. Our AI Agent Fin is the highest-performing AI Customer Agent on the market, enabling always-on customer support across the customer journey from service to sales to ecommerce. Founded in 2011, we are one of the fastest growing companies and one of the largest private software companies in the world, with nearly 30,000 global businesses using our products. You will join Team Web to shape our website across the full stack, working closely with product marketers, designers, and engineers. We offer a hybrid working policy with at least three days per week in the office, plus competitive salary and equity, weekday lunch, snacks, a stocked kitchen, regular compensation reviews, pension matching, life assurance, comprehensive health and dental insurance, flexible paid time off, paid maternity and paternity leave, and a Cycle-to-Work Scheme. We also maintain a radically open, accepting, and inclusive culture and are committed to equal employment opportunity.

last updated 34 week of 2026