Apply on company website London, England Hybrid Full-time

Fin (AI Group) is hiring a Senior Full Stack Engineer - Team Web

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 (e.g., 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. We look for engineers to be able to unblock themselves end to end
  • Build using the best tools in the industry. We invest heavily in AI-powered developer tools that remove friction and help you focus on solving meaningful problems.

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, Tailwind.
  • Experience in CMS platforms (such as Contentful and Sanity) and marketing tools (e.g. Google Tag Manager, Marketo)
  • Experience in 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, S3, etc.).
  • 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 in writing tests for front-end components, with familiarity in testing frameworks (e.g., Jest, Mocha, Cypress).
  • Strong problem-solving skills and the ability to work independently and as part of a team.
  • Bachelor’s degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience).

Benefits

  • Competitive salary and equity in a fast-growing start-up
  • We serve lunch every weekday, plus a variety of snack foods and a fully stocked kitchen
  • Regular compensation reviews - we reward great work!
  • Pension scheme & match up to 4%
  • Peace of mind with life assurance, as well as comprehensive health and dental insurance for you and your dependents
  • Flexible paid time off policy
  • Paid maternity leave, as well as 6 weeks paternity leave for fathers, to let you spend valuable time with your loved ones
  • If you’re cycling, we’ve got you covered on the Cycle-to-Work Scheme. With secure bike storage too
  • MacBooks are our standard, but we also offer Windows for certain roles when needed.

Work Arrangement

Hybrid

Team

Structure: Team Web

Additional Information

  • Hybrid working policy: employees expected to be in the office at least three days per week.
  • Radically open and accepting culture; company does not advocate on social or political topics in internal or external communications.
  • Personal opinion and expression on non-work topics respected on personal time and platforms.
  • MacBooks are standard equipment; Windows available for certain roles when needed.
Required Skills
HTMLCSSA/B Testing
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Job Details
Location London, England
Work mode Hybrid
Employment Full-time
Department Team Web
Category Full-Stack
Posted 3 days ago
Application On company website
About company
Fin (AI Group) logo

Fin is the #1 AI Agent for all customer service, powered by the Fin AI Engine™. It resolves complex customer queries across every channel including voice, email, chat, and social.

  • Fin is built by The AI Group, a team of over 60 machine learning scientists, engineers, and designers.
  • It uses a continuous improvement loop called the Fin Flywheel to train, test, deploy, and analyze performance.
  • Fin integrates seamlessly with existing helpdesks like Salesforce, HubSpot, and Intercom.

The platform is trusted by enterprises and certified with ISO 27001, ISO 27018, ISO 27701, GDPR, and CCPA compliance.

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