Software Engineer – Junior / Mid-Level

Software Engineer – Junior / Mid-Level

Location: Northern Virginia
Travel: Minimal / As Needed
Clearance: Active Top Secret clearance or higher required
Citizenship: US Citizenship required

About Grimm

Grimm is an innovative, forward-looking cybersecurity organization focused on solving complex technical challenges across hardware, firmware, and software systems. Our teams specialize in reverse engineering, vulnerability research, and security engineering, supporting mission-critical efforts across national security, defense, and critical infrastructure sectors.

Our work is rooted in real-world operational experience identifying advanced threats, uncovering critical vulnerabilities, and developing meaningful solutions to complex problems. Grimm engineers operate across embedded systems, vehicles, IoT, and enterprise technologies, with a focus on understanding systems deeply and demonstrating real-world impact.

We are a highly technical and hands-on organization. Our engineers and researchers specialize in breaking systems, discovering vulnerabilities, and improving resilience—working directly with real hardware and software to understand how systems function and how they fail.

About the Role

Grimm is seeking a mission-oriented Junior to Mid-Level Software Engineer with Computer Network Operations (CNO) knowledge or experience who is driven to solve challenging technical problems and build robust software systems.

This role supports a fully remote, small, and highly collaborative engineering team focused on end-to-end software development, tooling, and capability engineering supporting mission-driven customer requirements.

In this role, you’ll have the opportunity to work with both modern and low-level technologies, including learning and developing with Rust while leveraging more traditional systems programming tooling and APIs. You’ll contribute across the full software development lifecycle—from design and implementation to testing, debugging, documentation, and operational support.

We’re looking for individuals who are curious, self-motivated, technically capable, and excited to work alongside experienced engineers and researchers solving difficult mission-focused engineering problems.

What You’ll Do

Research and devise solutions to challenging technical problems
Develop and maintain mission-focused software tools and libraries
Participate in full-cycle software development including:Design
Implementation
Debugging
Testing
Maintenance

Build software systems from the ground up and enhance existing capabilities
Develop and execute unit and integration tests throughout development
Document code, libraries, and tooling for developers and end-users
Collaborate with engineers and technical teams in a remote environment
Participate in peer reviews and collaborative technical discussions
Support development efforts across multiple platforms and operating systems

Required Qualifications

Minimum 2+ years of hands-on systems programming experience on one or more of the following:Linux
Windows
macOS
iOS
Android

Proficiency in the C programming language
Understanding of Computer Network Operations (CNO) concepts
Experience with version control systems such as Git
Strong professionalism, attention to quality, and technical ownership
Ability to work independently in a remote environment
Strong verbal and written communication skills
Excellent interpersonal and collaboration skills within team environments

Preferred / Nice to Have

Professional experience developing CNO capabilities
Experience with the Rust programming language
Experience writing software for embedded systems
Experience writing cross-platform system-level software
Experience with one or more of the following APIs:win32
UCRT
Android NDK
iOS SDK
POSIX

Experience writing developer and end-user documentation
Experience developing and executing test plans
Experience writing unit tests or participating in test-driven development (TDD)
Experience with virtualization technologies
Experience with containerization technologies such as Docker
Experience with network programming
Proficiency in Python
Understanding of mobile operating systems such as iOS or Android
Understanding of binary file formats such as:ELF
Mach-O
PE

Understanding of low-level operating system and kernel concepts
Active Top Secret clearance with SCI eligibility and Polygraph

Benefits

Grimm offers a comprehensive benefits package that includes medical, dental, and vision coverage, life and disability insurance, retirement benefits, paid leave, and opportunities for tuition assistance and ongoing professional development.

Why Grimm

You’ll be working alongside highly specialized engineers and researchers tackling challenging problems in software engineering, offensive cyber capability development, and mission-focused systems engineering. Our work directly supports national security missions and requires strong technical ownership, creativity, and collaboration.

If you enjoy solving difficult technical problems, learning new technologies, building software from the ground up, and growing your skills alongside experienced engineers, you’ll find this environment both challenging and rewarding.

Equal Opportunity Employer

Grimm is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, sexual orientation, and gender identity), national origin, age, disability, genetic information, veteran status, or any other characteristic protected by applicable federal, state, or local laws.