Company Description

Zark Lab is a collaborative AI workspace that enables teams to analyze data at any scale through natural conversation. We provide complete infrastructure - from storage and compute to AI-powered analysis - so users can upload data, ask questions, and get insights without building systems or writing code. Our platform processes massive datasets (gigabytes to petabytes) and delivers real-time conversational analytics. We're building high-performance web experiences that make complex data analysis feel effortless. Join a team of engineers from leading tech companies who are redefining how people interact with data.

Role Description

We're looking for a Senior Frontend Engineer to build our next-generation web application. You'll work on high-performance interfaces that handle real-time AI streaming, large-scale file uploads, and collaborative analytics workflows. This is a full-time remote position where you'll have significant ownership over frontend architecture and user experience.

What You'll Build

Modern web application using Next.js (App Router), React, and TypeScript
Real-time streaming interfaces using Server-Sent Events (SSE) for AI-powered analytics
File upload workflows to Cloud Storage Systems
High-performance data visualization and collaborative workspace features
Optimized rendering strategies (streaming, hydration, edge caching) for fast page loads
Clean, maintainable component architecture with strong type safety

What You'll Do

Develop and maintain frontend features using Next.js, React, and TypeScript
Integrate Server-Sent Events (SSE) APIs for real-time streaming experiences with AI
Implement robust file upload workflows to Cloud Storage (handling files from MBs to GBs)
Optimize page performance: Lighthouse scores, bundle sizing, caching strategies, streaming rendering
Collaborate with backend engineers to refine API interfaces and improve end-to-end performance
Write clean, maintainable code with comprehensive testing, linting, and type safety
Identify UI/UX bottlenecks and implement performance improvements
Ship features independently with minimal oversight

Requirements

Strong experience with Next.js and React (App Router strongly preferred)
Expert-level TypeScript - you write type-safe code by default
Proven experience implementing SSE-based streaming on the frontend
Experience with Cloud Platform file uploads - presigned URLs, direct-to-cloud uploads, resumable uploads
Solid understanding of web performance optimization - bundle analysis, code splitting, caching, rendering strategies
Familiarity with modern build tools: Vite, Turbopack, Webpack, or similar
Strong communication skills and ability to work independently
Track record of shipping high-quality frontend applications

Nice-to-Have

Experience with AI/LLM applications using SSE streaming
Experience with file viewers, media previews, or large-file handling in the browser
Prior work with React Server Components and edge runtimes
Experience with Cloud Run, Pub/Sub, or backend development
Strong UI/UX awareness or experience with TailwindCSS / component systems (shadcn/ui, Radix, etc.)
Familiarity with collaborative editing or real-time multiplayer features
Experience with data visualization libraries (Recharts, D3, Plotly)

Why Join Zark Lab

Work on a cutting-edge AI analytics platform at the intersection of infrastructure and user experience
Significant ownership and impact - your work directly shapes the product
Collaborate with a high-caliber team of former founders and engineers from leading tech companies
Competitive salary and equity
Fully remote, flexible work environment
Modern tech stack with freedom to influence architecture decisions

Apply Now

If you're excited about building high-performance web applications that make data analysis feel magical, we'd love to hear from you.

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