Senior Frontend Engineer (React)

Senior Frontend Engineer (React)

Salary: $8000-$12,000

Full-time

B2B

Hybrid

We are looking for a Senior Frontend Engineer to join a fast-growing AI product company's engineering team. The role sits at the crossroads of frontend architecture and product experience, owning both the delivery of business-critical Next.js applications and the design of intuitive, trustworthy user experiences for agentic AI products.

Requirements

• Over 5 years of frontend engineering experience, including 3+ years specializing in React and modern TypeScript.

• Production Next.js experience: SSR applications at scale, app router, server components, and the trade-offs between SSR, SSG, and CSR.

• Complex state management for hard scenarios: real-time collaboration, optimistic updates, multi-tenant isolation, large-scale data sync.

• Experience building AI/LLM interfaces: streaming token responses, chat UIs, semantic search, or similar real-time AI interactions.

• High-load performance work: you monitor Core Web Vitals and know how to improve them under heavy traffic and large datasets.

• Enterprise application depth: localization, accessibility, security, and compliance, you understand the complexity beyond "making it work".

• A security-conscious approach to engineering: you handle sensitive data carefully and think about the security implications of what you ship.

• Strong craft and product instinct: you don't wait for perfect designs, you spot UX issues and propose solutions, and you're never satisfied with "good enough".

• AI-native working style. You already use AI coding agents daily and are eager to push the boundaries of harness engineering.

• Clear communication. You articulate design decisions and technical trade-offs clearly, verbally and in writing.

Key Responsibilities

• Design and ship production Next.js SSR applications with complex state, high-load scenarios, and real-time AI interactions at scale.

• Build interfaces for AI-powered features: streaming LLM responses, semantic search across millions of documents, interactive knowledge graphs, and agentic builders.

• Architect component libraries and maintain the design system, ensuring reusability, accessibility, and consistent UX across the platform.

• Deliver enterprise-grade functionality: localization, accessibility compliance, cross-browser support, and security.

• Take full ownership after launch: monitor performance in production, optimize bundle sizes, instrument for Core Web Vitals, and ensure things scale gracefully.

• Keep the bar high on code quality, testing, and craft through thoughtful code review and mentorship.