Frontend-Leaning Full Stack Software Engineer

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers. She will pick the best candidates from Jack's network. The next step is to speak to Jack. Broadly Job Title Full Stack Software Engineer (Frontend-leaning) Salary £80k-£100k + Equity Company Description Caribou is a YC-backed London startup, funded by Accel and Lakestar, building an autonomous tax platform to simplify complex international compliance. By automating Transfer Pricing, Caribou makes Big Four expertise accessible to global businesses, replacing manual translation of dense jurisdiction-specific data with elegant, actionable software for finance leaders. Job Description You will lead the evolution of Caribou's user interface, transforming complex international tax rules into intuitive data visualizations for CFOs. In practice, you'll own features end-to-end—from Postgres migrations to building data-dense entity graphs—ensuring high UI craft while leveraging AI tools to ship at a scale that shouldn't be possible for a small team. Location London, UK Why this role is remarkable Join a YC W19 batch company backed by elite investors including Accel and Lakestar, working directly with the founder and CTO.Solve a high-value information design problem where you turn dense, interlinked global tax data into legible, actionable insights for finance leaders.Work in a high-leverage environment that embraces AI-driven development and rewards engineers who balance product judgement with technical craft. What You Will Do Translate complex tax concepts into obvious-at-a-glance interfaces like entity graphs, intercompany flow diagrams, and compliance documentation.Evolve and own the design system and component library using Tailwind and shadcn/ui to ensure visual quality compounds.Build data-dense product views and manage the full feature lifecycle from TypeScript frontends to Postgres migrations and Go backend services. The ideal candidate Has 3+ years of experience building production web applications with a distinct focus on UI craft, hierarchy, and data visualization.Is proficient in the modern React ecosystem (Next.js, Tailwind) and comfortable working across the full stack with SQL and Postgres.Demonstrates excellent communication skills, capable of translating CFO requirements and tax specialist insights into technical specifications. Who are Jack & Jill? Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support. And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate. How does this work? Jack's an AI agent for job searching and career coaching. He works for you.Jill is the AI recruiter working for the company. She recruits from Jack's network.If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives. We never post fake jobs This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network. Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description. We appreciate this can make them look a bit suspect, but there isn't much we can do about it. Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.