# Senior Software Engineer (Agentic Search) - Web Access Engineer

**Company**: Nebius
**Location**: Amsterdam
**Experience**: senior
**Job type**: full-time
**Category**: Engineering
**Industry**: Technology

**Apply**: https://job-boards.greenhouse.io/nebius/jobs/5008563101?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_796c890c-cc8

## Description

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.

Responsibilities:

- 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

Requirements:

- 5+ years of experience as a software engineer working on production backend or infrastructure systems

- Expertise in several of the following areas:

- 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

- 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

Nice to Have:

- 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

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

## Skills

### Required
- Chromium architecture
- browser internals
- browser lifecycle
- navigation
- Chrome DevTools Protocol (CDP)
- Playwright
- Puppeteer
- Selenium
- browser automation frameworks
- browser instrumentation
- debugging
- HTTP/1.1
- HTTP/2
- HTTP/3
- TLS
- DNS
- browser networking
- cookies
- browser storage
- caching
- redirects
- session management
- JavaScript execution
- modern client-side rendering
- resource loading
- page lifecycle
- browser fingerprinting

### Nice to have
- Go
- C++
- Rust
- Python
- Kubernetes
- cloud infrastructure

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Source: [Apply at job-boards.greenhouse.io](https://job-boards.greenhouse.io/nebius/jobs/5008563101?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)