Senior Software Engineer, Browser Security & AI

Menlosecurity; United Kingdom; On-site; GBP 110,000 - 150,000; Full time

Job summary

Menlo Security in the United Kingdom is seeking a Senior Software Engineer to join the Data Security & AI Engineering team. You will design and maintain Chromium-based browser components in C++, tackling security and AI-driven capabilities to protect enterprise environments.

Collaborate with cross-functional teams across Chromium, AI, and security. You will work with MCP servers, CDP, and cloud infrastructure (AWS/GCP, Kubernetes, Terraform) to deliver high-performance, evasion-resistant

Qualifications

• 5+ years of software engineering with strong C++ systems programming.
• Strong networking fundamentals, including HTTP security, web protocols and/or client-side security architecture.
• Bachelor's degree or higher in Computer Science or a related field (or equivalent practical experience).

Responsibilities

• Design, build, and maintain Chromium-based browser components in C++, across layers such as content, browser, core, compositor, skia, and networking.
• Architect and embed controls for detecting Prompt Injection and managing Shadow AI activity within browser execution and agent workflows.
• Apply networking fundamentals to harden browser isolation, proxy/gateway intercepts, and network-facing infrastructure.
• Collaborate with MARS and AI teams to integrate AI agent capabilities and MCP servers into the security platform.
• Use Python or Rust to build tooling and detection microservices alongside core C++ work.
• Deploy and operate cloud infrastructure (AWS, GCP) and orchestration (Kubernetes, Terraform) for agent/MCP workloads.
• Debug and optimize high-performance, large-scale systems across browser and backend.
• Work with product, security, and AI teams to ship capabilities end-to-end.
• Leverage AI-assisted coding tools to accelerate development, testing, and code review.

Skills

C++ systems programming

Networking fundamentals

HTTP security

Python or Rust

Education

Bachelor's degree in Computer Science or related field

Tools

Chromium stack

AWS

GCP

Terraform

Kubernetes

Linux

Chrome DevTools Protocol (CDP)

Model Context Protocol (MCP) servers

Job description

Menlo Security in the United Kingdom is seeking a Senior Software Engineer to join the Data Security & AI Engineering team. You will design and maintain Chromium-based browser components in C++, tackling security and AI-driven capabilities to protect enterprise environments.

Collaborate with cross-functional teams across Chromium, AI, and security. You will work with MCP servers, CDP, and cloud infrastructure (AWS/GCP, Kubernetes, Terraform) to deliver high-performance, evasion-resistant