Senior Full Stack Engineer - Team Web

What's the opportunity? Our company website is the centerpiece of our brand — the public source of truth about Fin's products and the number one driver of leads for our demand generation team. Fin.ai sits at the intersection of awareness, product marketing, demand, and support, requiring robust, performant, and reliable infrastructure as much as polished user-facing interfaces. We’re looking for a Senior Full Stack Engineer to join Team Web, who is passionate about crafting intuitive front‑end experiences and building the backend systems and tools that power them. You’ll play a key role in shaping the future of our website across the full stack, from UI to infrastructure, while collaborating with product marketers, designers, and engineers across the business.

What will I be doing?

• 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.
• Build using the best tools in the industry.

What skills do I need?

• 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.

Fin values diversity and is committed to a policy of Equal Employment Opportunity. Fin will not discriminate against an applicant or employee on the basis of race, color, religion, creed, national origin, ancestry, sex, gender, age, physical or mental disability, veteran or military status, genetic information, sexual orientation, gender identity, gender expression, marital status, or any other legally recognized protected basis under federal, state, or local law.