Senior Windows Systems Engineer - Low-Level Real-Time Remote

Kyber; United States; Hybrid; USD 150,000 - 210,000; Full time

Benefits offered by this job

Health insurance

50% transportation card reimbursement

Job summary

Kyber is seeking a senior Windows systems engineer to design, develop, and optimize low-level components—services, agents, and drivers—across user and kernel modes. You will work with native Win32 APIs and internal Windows ecosystem components, focusing on performance and security.

You will mentor juniors, participate in architecture decisions, and help evolve Windows internals tooling. The role offers on-site/hybrid/remote options across Europe, with French benefits and strong autonomy.

Qualifications

• 5–10 years of professional software development focused on Windows systems.
• Deep knowledge of Windows architecture, memory, synchronization, and error handling.
• Solid understanding of user-mode vs kernel-mode boundaries and session management.
• Hands-on experience with Windows debugging and analysis tools.
• Proficiency in C, C++, and Rust, plus x86/x64 assembly.

Responsibilities

• Design, develop, and optimize low-level Windows components (services, agents, drivers).
• Work with Win32 and NT Native APIs; integrate with Active Directory and Kerberos.
• Investigate performance, memory, synchronization, and security issues.
• Debug using crash dumps, kernel debugging, stack analysis, and reverse engineering.
• Contribute to architecture decisions; perform senior code reviews; write docs.
• Mentor junior engineers and maintain Windows internals tooling.

Skills

Windows systems

C/C++

Rust

Windows debugging

x86/x64 assembly

Visual Studio

Git workflows

Kernel-mode

Performance tuning

Tools

WinDbg

Windows Performance Analyzer

ETW

Job description

Kyber is seeking a senior Windows systems engineer to design, develop, and optimize low-level components—services, agents, and drivers—across user and kernel modes. You will work with native Win32 APIs and internal Windows ecosystem components, focusing on performance and security.

You will mentor juniors, participate in architecture decisions, and help evolve Windows internals tooling. The role offers on-site/hybrid/remote options across Europe, with French benefits and strong autonomy.