Senior Software Engineer (Agentic Search) - Web Access Engineer

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.

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.

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.

We are looking for a Senior Software Engineer to build the web access infrastructure behind a novel search engine designed for agentic AI.
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.
Research and analyse how modern websites communicate with browsers across the complete request lifecycle
Investigate browser fingerprinting, client verification mechanisms, and modern web technologies to enable reliable web access
Build tooling for browser instrumentation, debugging, observability, and large-scale experimentation
Translate technical research into production systems operating at internet scale

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 Technologies
Chromium architecture and browser internals
Browser lifecycle and navigation
Chrome DevTools Protocol (CDP)
Playwright, Puppeteer, Selenium, or similar browser automation frameworks
Browser instrumentation and debugging

Web Platform
HTTP/1.1, HTTP/2, HTTP/3 — TLS, DNS, and browser networking
Cookies, browser storage, caching, redirects, and session management
JavaScript execution and modern client-side rendering
Resource loading, page lifecycle, and browser networking
Browser fingerprinting concepts and browser characteristics
Experience working on browser engines or browser infrastructure
Experience reverse engineering browser or web application behaviour
Experience building internet-scale distributed systems
Go, C++, Rust, or Python
Kubernetes and cloud infrastructure

We conduct coding interviews as part of the process.
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