About the role

Frontend Engineer to build and own the web app for AI companion Replika. Collaborate across teams to deliver high-quality features and improvements in a fully remote setting.

Responsibilities

Build and own the Replika web app and our web growth surfaces — marketing site, conversion flows, account and dashboard surfaces, and the supporting tools around them.
Architect frontend systems that scale. State management, real-time updates, performance budgets, the works.
Ship live, conversational features on the web. Companions that feel responsive, not laggy. Sub-second is the bar.
Work directly with product, design, and backend engineering. No PMs translating tickets at you. You’re in the room.
Wire up analytics and experimentation across web surfaces. We test, we learn, we iterate. Decisions come from data, not vibes.
Set the bar for code quality, performance, and craft. New hires will model what you ship.

5+ years of commercial frontend experience
Deep expertise in React and Next.js — you’ve shipped production apps with both, not just dabbled.
Rock-solid web fundamentals. HTML, CSS, JavaScript, TypeScript.
Strong opinions on state management. Redux, Zustand, TanStack Query — you’ve used them, you know the trade-offs, you pick the right one for the job.
Comfortable working with REST APIs and WebSockets.
Real-time data flow doesn’t faze you.
You build responsive layouts that actually hold up. CSS Modules, Styled Components, whatever the situation calls for.
Fluent with Git, collaborative workflows, modern build tools (Webpack, Vite), CI/CD pipelines, and linters.
You ship clean, you ship fast.
End-to-end ownership. You take a problem from spec to production and don’t need a project manager hovering.
Strong product and business sense to match.
You use AI development tools (Codex, Claude, Cursor) seriously, and have a view on where they help and where they don’t.
Strong English. Upper-Intermediate or higher.