Senior Software Engineer (Agentic Search) - Web Access Engineer

About Nebius

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.

The Product

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.

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.

The Role

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.

Your Responsibilities Will Include

Research and analyse how modern websites communicate with browsers across the complete request lifecycleInvestigate browser fingerprinting, client verification mechanisms, and modern web technologies to enable reliable web accessBuild tooling for browser instrumentation, debugging, observability, and large-scale experimentationTranslate 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 internalsBrowser lifecycle and navigationChrome DevTools Protocol (CDP)Playwright, Puppeteer, Selenium, or similar browser automation frameworksBrowser instrumentation and debugging

Web Platform

HTTP/1.1, HTTP/2, HTTP/3 — TLS, DNS, and browser networkingCookies, browser storage, caching, redirects, and session managementJavaScript execution and modern client-side renderingResource loading, page lifecycle, and browser networkingBrowser fingerprinting concepts and browser characteristics

Experience working on browser engines or browser infrastructureExperience reverse engineering browser or web application behaviourExperience building internet-scale distributed systemsGo, C++, Rust, or PythonKubernetes and cloud infrastructure

We conduct coding interviews as part of the process.

Benefits & Perks

Competitive compensationCareer growth and learning opportunitiesFlexibility and ownershipCollaborative and innovative cultureOpportunity to work on impactful AI projectsInternational 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

Equal Opportunity Statement

Nebius is an equal opportunity employer. We are committed to fostering an inclusive and diverse workplace and to providing equal employment opportunities in all aspects of employment. We do not discriminate on the basis of race, color, religion, sex (including pregnancy), national origin, ancestry, age, disability, genetic information, marital status, veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by applicable law.

Applicants must be authorized to work in the country in which they apply and will be required to provide proof of employment eligibility as a condition of hire.

If you need accommodations during the application process, please let us know.