Senior Frontend Engineer (React)
Salary: $8000-$12,000
Full-time
B2B
Hybrid in Warsaw 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. 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. Please include GDPR consent
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Hybrid/Warsaw
Senior Frontend Engineer (React)
8000 - 12000 USD
gross/month - mandate contract
gross/month - mandate contract
apply via email
8000 - 12000 USD
recruitment@devsdata.com
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