Full-Stack Product Engineer (React/Next.JS + AI Infrastructu

• Diagnose and fix production React, Next.js and TypeScript bugs affecting storefront reliability and conversion.
• Investigate cart, checkout, promotion, mobile and browser-session failures.
• Improve PostHog event tracking, funnels, session replay, error monitoring and alerts.
• Build Playwright end-to-end tests for critical customer journeys and configure BrowserStack coverage.
• Develop and maintain frontend features, backend services and third-party integrations.
• Help manage Linux servers, Docker environments, CI/CD pipelines, networking and cloud infrastructure.
• Support GPU machines, locally hosted AI models and internal AI coding-agent workflows.
• Use AI development tools effectively while reviewing, testing and understanding all resulting code.
• Document root causes, technical decisions and regression coverage.
• Work directly with the founders to prioritize and deliver improvements.

Success will be measured by fewer production regressions, faster issue resolution, stronger automated test coverage, more reliable analytics and demonstrable improvements to customer experience and conversion.