Senior Software Engineer (Agentic Search) - Web Access Engineer

<div class="content-intro"><p><strong>About Nebius:</strong></p> <p>Nebius is leading a new era in cloud infrastructure for the global AI economy. We are building a full-stack AI cloud platform that supports developers and enterprises from data and model training through to production deployment, without the cost and complexity of building large in-house AI/ML infrastructure.</p> <p>Built by engineers, for engineers. From large-scale GPU orchestration to inference optimization, we own the hard problems across compute, storage, networking and applied AI.</p> <p>Listed on Nasdaq (NBIS) and headquartered in Amsterdam, we have a global footprint with R&D hubs across Europe, the UK, North America and Israel. Our team of 1,500+ includes hundreds of engineers with deep expertise across hardware, software and AI R&D.</p></div><h3><strong><span data-contrast="auto">The Product</span></strong></h3> <p class="font-claude-response-body break-words whitespace-normal">In a rapidly evolving world, trust in AI depends on AI agents being grounded in fresh, verified real-world data. Search is the foundation that makes this possible.</p> <p class="font-claude-response-body break-words whitespace-normal">We are building an agent-native search platform designed specifically for AI systems rather than human users. Our product provides programmatic, low-latency, and observable search APIs that AI agents use to retrieve, filter, and reason over real-world information at scale.</p> <h3><strong><span data-contrast="auto">The Role</span></strong></h3> <p class="font-claude-response-body break-words whitespace-normal">We are looking for a Senior Software Engineer to build the web access infrastructure behind a novel search engine designed for agentic AI.</p> <p class="font-claude-response-body break-words whitespace-normal">In this role, you will investigate how modern websites communicate with browsers and translate that understanding into production systems operating at internet scale. You will build browser infrastructure and tooling that enables reliable, efficient access to web content across a rapidly changing web.</p> <p class="font-claude-response-body break-words whitespace-normal"><strong>Your responsibilities will include:</strong></p> <ul class="[li_&]:mb-0 [li_&]:mt-1 [li_&]:gap-1 [&:not(:last-child)_ul]:pb-1 [&:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1"> <li class="font-claude-response-body whitespace-normal break-words pl-2">Research and analyse how modern websites communicate with browsers across the complete request lifecycle</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Investigate browser fingerprinting, client verification mechanisms, and modern web technologies to enable reliable web access</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Build tooling for browser instrumentation, debugging, observability, and large-scale experimentation</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Translate technical research into production systems operating at internet scale</li> </ul> <p class="font-claude-response-body break-words whitespace-normal"><strong>Requirements</strong></p> <p class="font-claude-response-body break-words whitespace-normal">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:</p> <p class="font-claude-response-body break-words whitespace-normal"><em>Browser Technologies</em></p> <ul class="[li_&]:mb-0 [li_&]:mt-1 [li_&]:gap-1 [&:not(:last-child)_ul]:pb-1 [&:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1"> <li class="font-claude-response-body whitespace-normal break-words pl-2">Chromium architecture and browser internals</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Browser lifecycle and navigation</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Chrome DevTools Protocol (CDP)</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Playwright, Puppeteer, Selenium, or similar browser automation frameworks</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Browser instrumentation and debugging</li> </ul> <p class="font-claude-response-body break-words whitespace-normal"><em>Web Platform</em></p> <ul class="[li_&]:mb-0 [li_&]:mt-1 [li_&]:gap-1 [&:not(:last-child)_ul]:pb-1 [&:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1"> <li class="font-claude-response-body whitespace-normal break-words pl-2">HTTP/1.1, HTTP/2, HTTP/3 — TLS, DNS, and browser networking</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Cookies, browser storage, caching, redirects, and session management</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">JavaScript execution and modern client-side rendering</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Resource loading, page lifecycle, and browser networking</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Browser fingerprinting concepts and browser characteristics</li> </ul> <p class="font-claude-response-body break-words whitespace-normal"><strong>Nice to Have</strong></p> <ul class="[li_&]:mb-0 [li_&]:mt-1 [li_&]:gap-1 [&:not(:last-child)_ul]:pb-1 [&:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1"> <li class="font-claude-response-body whitespace-normal break-words pl-2">Experience working on browser engines or browser infrastructure</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Experience reverse engineering browser or web application behaviour</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Experience building internet-scale distributed systems</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Go, C++, Rust, or Python</li> <li class="font-claude-response-body whitespace-normal break-words pl-2">Kubernetes and cloud infrastructure</li> </ul> <p><span data-ccp-props="{}"><em data-stringify-type="italic">We conduct coding interviews as part of the process.</em></span></p><div class="content-conclusion"><p><strong>Benefits & Perks:</strong></p> <ul> <li>Competitive compensation</li> <li>Career growth and learning opportunities</li> <li>Flexibility and ownership</li> <li>Collaborative and innovative culture</li> <li>Opportunity to work on impactful AI proj