Senior Windows Platform Architect - Kernel & Performance

Malwarebytes; Illinois; On-site; USD 240,000 - 250,000; Full time

Benefits offered by this job

Comprehensive medical, dental, and vis

Employee Referral Bonus Program

Wellness programs

401k and employer matching

Comprehensive Time Off policy

Opportunity to do something great for

Job summary

Malwarebytes is seeking a senior Windows Platform Architect to shape core Windows components, from kernel drivers to user-mode services. This hands-on role requires deep Windows internals expertise and leadership across US and European teams.

You will optimize performance, diagnose hard system issues, and drive driver signing collaborations with Microsoft while mentoring engineers and delivering measurable memory/CPU gains.

Qualifications

• 10+ years building software with deep Windows internals focus.

Responsibilities

• Own the design of core Windows components, from kernel drivers to user mode services.
• Make our product fast and light: reduce CPU, memory usage, and startup time.
• Find and fix hard system issues using crash dumps, traces, and kernel debugging.
• Lead driver signing and certification work with Microsoft.
• Assist with urgent issues during US hours (certificates, signing, false positives).
• Review new Windows features/APIs and decide usage.
• Collaborate with Research to bring protections to OS level.
• Utilize AI tools to speed design/build/test.
• Coach engineers on Windows internals and good design.
• Deliver clear gains in memory and CPU usage across Windows product.
• Lead design of at least one major driver/core component change.
• Be the go-to Windows platform expert during US hours

Skills

Windows internals

Kernel driver work

C/C++

C#/.NET performance

Performance debugging tools

High-rights software stability

Communication/knowledge sharing

Tools

WinDbg

ETW

PerfView

Job description

Malwarebytes is seeking a senior Windows Platform Architect to shape core Windows components, from kernel drivers to user-mode services. This hands-on role requires deep Windows internals expertise and leadership across US and European teams.

You will optimize performance, diagnose hard system issues, and drive driver signing collaborations with Microsoft while mentoring engineers and delivering measurable memory/CPU gains.