Senior Software Engineer, Agentic Search Browser Core

FDE Times; Nottingham; On-site; GBP 100,000 - 140,000; Full time

Benefits offered by this job

Competitive pay

Career growth

Flexible work

Collaborative culture

Impactful AI projects

International teams

Job summary

Nebius is seeking a Senior Software Engineer to work on the rendering infrastructure for a cutting-edge agent-focused search platform. You will modify Chromium components to reduce CPU, memory, and startup costs while preserving required web functionality.

You will ensure compatibility with web standards, profile large browser fleets, and help build the production system that launches, pools, and monitors browser instances at scale.

Qualifications

• Strong C++ in a large, performance-sensitive codebase (Chromium/Blink/V8 experience preferred).
• Experience with Chromium architecture, process model, IPC, rendering pipeline, and network service.
• Background in profiling and optimizing browser performance (CPU, memory, I/O).

Responsibilities

• Modify Chromium core to cut CPU, memory and startup costs per page.
• Strip Chromium for agent workloads while preserving essential scripts and behavior.
• Ensure compatibility with web standards and rendering expectations.
• Profile fleets of browsers and tune process models, memory usage and crash handling.
• Build and operate the production system for launching, pooling, and monitoring browsers.

Skills

C++

Chromium/Blink/V8

Performance profiling

Go/Python basics

Tools

Perf

Tracing

Flame graphs

Chrome DevTools Protocol

Job description

Nebius is seeking a Senior Software Engineer to work on the rendering infrastructure for a cutting-edge agent-focused search platform. You will modify Chromium components to reduce CPU, memory, and startup costs while preserving required web functionality.

You will ensure compatibility with web standards, profile large browser fleets, and help build the production system that launches, pools, and monitors browser instances at scale.