Senior Software Engineer, Zero Trust Client

Cloudflare•Austin, TX

1d•$185,000 - $254,000•Hybrid

About The Position

We’re looking for a Senior Windows Software Engineer to join our Zero Trust team. You will be working on the Zero Trust desktop client, which protects corporate devices by securely and privately sending traffic from those devices to Cloudflare’s global network, which can apply advanced web filtering and advanced Zero Trust policies. In your role, you will predominantly be using Rust along platform-native languages & APIs to implement high-performance networking code that runs on multiple desktop platforms. You’ll be expected to improve the code quality and to build solid, testable, and well-documented foundations. You will be most successful in this role if you have a good understanding of Windows internals (virtual memory, multi-threading, process lifecycle, kernel programing, system APIs, etc.) and networking protocols (TCP/IP, UDP, DNS, QUIC, H/3, proxying, etc.). You will also have to interact with other languages, such as Swift, C#, C, and python. As a Senior Software Engineer, you will be expected to make significant contributions to the design and implementation of major development projects, working closely with our product managers and other teams to implement customer-impacting features. You will work on stimulating problems born out of the scale of our deployment, and the stringent quality, performance, and security requirements of our product.

Requirements

Good understanding of Windows internals (virtual memory, multi-threading, process lifecycle, kernel programing, system APIs, etc.).
Good understanding of networking protocols (TCP/IP, UDP, DNS, QUIC, H/3, proxying, etc.).
Experience interacting with other languages, such as Swift, C#, C, and python.
Excellent programming skills, with experience writing very high-quality and low-complexity code with thorough documentation.
Strong experience writing easily-testable and thoroughly-tested code (e.g. using dependency injection with the right abstractions).
Great experience using lower-level languages, such as Rust, C, C++.
Very comfortable writing multithreaded, asynchronous code.
Strong experience with debugging network-related problems.
An understanding of how VPN technologies work, and the trade-offs between privacy, security, and anonymity.
Good understanding of, and experience with, security protocols and standards.
Empathetic, proactive, and constructive communication skills, verbal and written.

Nice To Haves

In-depth knowledge of Windows internals, kernel-mode programming, and network protocols.
Experience in low-level Windows driver development, ideally network drivers.

Responsibilities

Implement high-performance networking code that runs on multiple desktop platforms using Rust along platform-native languages & APIs.
Improve code quality and build solid, testable, and well-documented foundations.
Make significant contributions to the design and implementation of major development projects.
Work closely with product managers and other teams to implement customer-impacting features.
Work on stimulating problems born out of the scale of our deployment, and the stringent quality, performance, and security requirements of our product.
Mentor engineers and raise a team's technical bar through code review and knowledge sharing.
Own technical designs end-to-end, writing specs and design docs that coordinate work across engineers and teams.
Debug and resolve complex issues that span team and system boundaries.

Benefits

Medical/Rx Insurance
Dental Insurance
Vision Insurance
Flexible Spending Accounts
Commuter Spending Accounts
Fertility & Family Forming Benefits
On-demand mental health support and Employee Assistance Program
Global Travel Medical Insurance
Short and Long Term Disability Insurance
Life & Accident Insurance
401(k) Retirement Savings Plan
Employee Stock Participation Plan
Flexible paid time off covering vacation and sick leave
Leave programs, including parental, pregnancy health, medical, and bereavement leave