Senior Low Level Engineer - Infrastructure

Senior Low Level Engineer - Infrastructure

About the Role

Build the agent that Neo's whole product depends on: a privileged, cross-platform systems program written in Rust. Everything Neo shows a security team starts on the endpoint.

The sensor is the organization's presence on each machine - responsible for collection, posture and visibility, and local enforcement of the organization's security policies. Doing that well means running deep in the operating system on Windows, macOS and Linux: always on, trusted with elevated access, and never in the way. This role owns the hard parts of it.

What you'll work on

The low-level, OS-level infrastructure the sensor is built on: the layer that handles low-level and OS-level operations directly and turns raw platform capabilities into reliable building blocks for everything above it - installation and deployment, endpoint security frameworks, network visibility, driver-adjacent work and more.

Infrastructure that is the backbone of the product — code where stability, correctness, and quality aren't aspirations but the actual job, because every feature Neo ships stands on it.

The sensor's core capabilities on top of that foundation: collection, posture and visibility, and local enforcement of the organization's security policies.

Reliability engineering for software that can't fail quietly: crash handling, recovery, and keeping the agent healthy and hard to tamper with on machines no one is watching.

The full lifecycle of a production system agent: how it ships, installs, updates, and runs unattended across a customer fleet.

Tech you'll work with

The work is low-level systems development in Rust, close to the operating system across Windows, macOS, and Linux - memory, processes, files, networking and the OS internals that expose them.

Alongside that, you'll lean hard on agentic coding tools; deep fluency with at least one is central to how we work, not a bonus. Expect to range across the stack - OS internals, AI tooling internals, CI, and a fair amount of reverse engineering - and to learn the parts you don't know yet.

What we're looking for

5+ years of systems programming in Rust, C, or C++, working close to the OS.

Hands-on experience with the internals of at least one of Windows, macOS or Linux (services or daemons, process and file APIs, security frameworks and low level development).

Experience shipping and operating production-grade software for a large customer base - you understand what enterprise-grade means in practice: reliability across thousands of diverse environments, upgrades that can't break anyone, and problems you only ever see through telemetry

Strong ownership and independence - you drive your work end to end, stay independent without going dark, and keep the customer's experience in view even when you're ten layers deep in the OS.

A team player with strong communication skills - you explain deep technical work clearly, surface problems and discuss them, resolve technical disagreements with arguments rather than ego, and make the people around you better.

Nice to have

A security background - endpoint protection, EDR/MDM, or any product whose job is defending machines rather than just running on them.

Networking - protocols, secure transport, and how software behaves on real-world networks; hands-on experience with traffic inspection, interception, or network visibility tooling is a real plus.

Deeper AI knowledge - beyond daily tool use: how models and agents work under the hood, or experience building agentic workflows and evaluating their output.

Applied cryptography - you've worked with encryption, signing, or trust chains in real systems, not just used a library blindly.

Backend / Full stack knowledge and understanding.