Full-Stack Engineer (Frontend)

About Us At algo1, we are reinventing one of the world's most familiar experiences: the in-store grocery trip. We are building an AI-native product that understands each shopper, responds to their context in real time, and makes an everyday experience less stressful, more personal, and more engaging. We're backed by leading investors and founded by two entrepreneurs: one with a track record of building companies, and the other a leader in retail data and shopper analytics. Together, they have brought together frontier AI researchers and engineers, product and strategy leaders, and senior operators from major UK and US grocery businesses. The people who join now will have an opportunity to shape the product, the engineering culture, and what algo1 becomes. The Role This role reports to our Head of B2B Product, James. Working with him and our product, design, mobile, and machine-learning teams, you'll design and build the web experiences that redefine how brands and retailers serve their shoppers. You'll be a full-stack engineer with a frontend centre of gravity, going as far down the stack as each feature needs. You'll turn ambitious and sometimes ambiguous product ideas into software that retailers and brand partners rely on to create, launch, and measure their in-store activity. You'll be shaping the interfaces that our B2B customers use every day, making the calls on how complex, intelligent capabilities get expressed through interfaces that non-technical users can pick up and trust. We're agentic-first. Every engineer has access to frontier AI tooling and our own coding harness, and we expect you to use them to move faster, attempt more ambitious work, and stay fully accountable for what you ship. What You'll Own - Full-stack delivery end-to-end. Own substantial features from product conversation through design, implementation, and iteration in production. Most of the weight sits in the frontend, but you go as far down the stack as the feature needs. - Reactive w