Senior Software Engineer (Agentic Search) – Web Rendering Engineer

The Role

We are looking for a Senior Software Engineer to build the rendering infrastructure behind a novel search engine designed for agentic AI. In this role, you will design systems that transform modern web applications into high quality structured content for search and AI. You will work on browser rendering, JavaScript execution, and large-scale rendering infrastructure capable of processing billions of pages efficiently. Modern websites increasingly rely on client-side rendering, dynamic data loading, and complex application frameworks. Your work will ensure we can reliably render, understand, and extract valuable information while minimising cost and latency.

Responsibilities

In this position, your responsibility will be to:

• Design and build large-scale rendering systems for modern web applications
• Develop browser-based rendering infrastructure capable of executing complex JavaScript applications reliably
• Research how modern frontend frameworks render and deliver content
• Improve rendering quality, completeness, and performance across diverse websites
• Optimise rendering cost, latency, resource utilisation, and throughput at internet scale
• Translate rendering research into reliable production systems

Qualifications

You may be a good fit if you:

• Have 5+ years of experience as a software engineer working on production backend or infrastructure systems and are an expert in several of the following areas:
  • Browser Rendering
    • Chromium rendering pipeline — DOM, Layout, Paint, and Compositing
    • JavaScript execution inside browsers and rendering lifecycle and page readiness
    • Headless browser execution and browser instrumentation
    • Chrome DevTools Protocol (CDP)
    • Playwright, Puppeteer, Selenium, or similar frameworks
  • Modern Web Applications
    • React, Vue, Angular, Svelte, and modern frontend architectures
    • Server-side rendering (SSR), client-side rendering (CSR), and streaming rendering
    • Single-page applications (SPA) and Progressive Web Apps (PWA)
    • Resource loading, lazy loading, and modern JavaScript bundles

Strong candidates may also have experience with:

• Building and operating high-throughput content processing pipelines at internet scale
• Distributed systems design and performance optimisation
• Open-source contributions or active involvement in the engineering community
• Conference talks or technical publications

Benefits & Perks

• Competitive compensation
• Career growth and learning opportunities
• Flexibility and ownership
• Collaborative and innovative culture
• Opportunity to work on impactful AI projects
• International environment and talented teams

What's it like to work at Nebius

• Fast moving
• Bold thinking
• Constant growth
• Meaningful impact
• Trust and real ownership
• Opportunity to shape the future of AI