Senior Software Engineer (Agentic Search) – Web Rendering Engineer

Tavily

9/10/2026 Full-time

&nbsp; <h3>About&nbsp;Tavily&nbsp;</h3> We're&nbsp;building the infrastructure layer for agentic web interaction at scale. Our API is designed from the ground up to power Retrieval-Augmented Generation (RAG) and real-time reasoning in AI systems. By connecting LLMs to high-quality, trustworthy web content, we help developers build agents that are not only intelligent — but also informed.&nbsp; We work with some of the most innovative teams in AI — from small startups shaping the ecosystem to the largest enterprises deploying AI at scale. Whether&nbsp;it's&nbsp;powering sales assistants, research copilots, or internal knowledge tools,&nbsp;we're&nbsp;the missing link between LLMs and the real world.&nbsp; <h3>The Role</h3> 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&nbsp;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&nbsp;and latency.&nbsp; In this position, your responsibility will be to: <ul> <li>Design and build large-scale rendering systems for modern web applications</li> <li>Develop browser-based rendering infrastructure capable of executing complex JavaScript applications reliably</li> <li>Research how modern frontend frameworks render and deliver content</li> <li>Improve rendering quality, completeness, and performance across diverse websites</li> <li>Optimise rendering cost, latency, resource utilisation, and throughput at internet scale</li> <li>Translate rendering research into reliable production systems</li> </ul> You may be a good fit if you: Have 5+ years of experience as a software engineer working on production backend or&nbsp;infrastructure systems and are an expert in several of the following areas: <ul> <li>Browser Rendering</li> <li>Chromium rendering pipeline — DOM, Layout, Paint, and Compositing</li> <li>JavaScript execution inside browsers and rendering lifecycle and page readiness</li> <li>Headless browser execution and browser instrumentation</li> <li>Chrome DevTools Protocol (CDP)</li> <li>Playwright, Puppeteer, Selenium, or similar frameworks Modern Web Applications</li> <li>React, Vue, Angular, Svelte, and modern frontend architectures</li> <li>Server-side rendering (SSR), client-side rendering (CSR), and streaming rendering</li> <li>Single-page applications (SPA) and Progressive Web Apps (PWA)</li> <li>Resource loading, lazy loading, and modern JavaScript bundles</li> </ul> Strong candidates may also have experience with: <ul> <li>Building and operating high-throughput content processing pipelines at internet scale</li> <li>Distributed systems design and performance optimisation</li> <li>Open-source contributions or active involvement in the engineering community</li> <li>Conference talks or technical publications</li> </ul> We conduct coding interviews as part of the process. Why&nbsp;Tavily?&nbsp; <ul> <li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559683&quot;:0,&quot;335559684&quot;:-2,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="1" data-aria-level="1">Full ownership&nbsp;— small team, you own the entire infrastructure, not a slice of it&nbsp;</li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559683&quot;:0,&quot;335559684&quot;:-2,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="2" data-aria-level="1">Real scaling challenges&nbsp;— bursty scraping workloads, cache invalidation, multi-region, millions of daily requests&nbsp;</li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559683&quot;:0,&quot;335559684&quot;:-2,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="3" data-aria-level="1">AI-native company&nbsp;— your infra directly powers AI agents used by leading companies in the space.&nbsp;</li> </ul> &nbsp; &nbsp;Find <a href="https://www.arbeitnow.co.uk">Jobs in United Kingdom</a> on Arbeitnow</a>

Agentic Search

Senior Software Engineer (Agentic Search) – Web Rendering Engineer

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