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Role Description

The Principal Software Engineer serves as a senior technical leader responsible for the architecture, design, and implementation of high-performance Windows-based systems written in C and C++. This role provides deep expertise in cryptography, FIPS compliance, archive file formats, and advanced Windows internals. The position combines strategic architectural leadership with hands-on development of security-critical components.

• Lead the development of core system components, ensuring performance, reliability, and security across all layers of the platform.
• Architect and implement foundational components in C and C++ with a focus on maintainability.
• Design secure systems with rigorous attention to cryptographic correctness, performance optimization, and defense-in-depth principles.
• Lead FIPS 140 compliance initiatives, including modernization and adoption of new standards, technical documentation, and codebase updates.
• Implement and maintain encryption capabilities using industry-standard algorithms and secure coding best practices.
• Guide the team toward new ways to use encryption to increase user adoption and retention, including researching and adoption of post-quantum technologies.
• Design and support archive file formats, including compression, decompression, encryption layers, and metadata handling across formats such as ZIP and related standards.
• Drive architectural decisions for Windows-based applications and system-level components.
• Conduct in-depth code reviews and establish secure coding standards across the engineering team.
• Diagnose and resolve complex low-level issues involving performance, memory management, multithreading, and system integration.
• Ability to get a public trust security clearance and pass a background check.

Qualifications

• Extensive professional experience developing portable software in C and C++.
• Strong background in cryptographic implementation and secure coding practices.
• Hands-on experience with FIPS 140 compliance requirements.
• Deep understanding of encryption and hashing algorithms such as SHA-2/3, and compression algorithms including AES, RSA, LZMA, PPMd, and BZip.
• Practical experience implementing or maintaining archive file formats such as ZIP, RAR, 7z, and TAR.
• Advanced knowledge of Windows software architecture, including Windows Crypto and CNG APIs, user-mode and kernel-mode concepts, multithreading and concurrency models, memory management techniques, and Windows security architecture.
• Expertise in debugging complex, low-level system behavior and producing high-quality architectural documentation.

Requirements

• Familiarity with Windows system services, drivers, and low-level operating system interactions.
• Knowledge of secure software development lifecycle (SSDLC) methodologies.
• Experience optimizing performance-sensitive and security-critical systems.
• Strong communication skills and the ability to influence technical direction across teams.

Benefits

• Empowering people to work when, how, and where they want.
• Flexible work environment.