Software Engineer I - Junior Level

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., Grimm is seeking a Junior Software Engineer to support the VAIL program, an FBI-focused effort centered on reverse engineering, vulnerability research, exploitation, and mission-driven cyber operations. This role is ideal for an early-career engineer with hands-on software development experience, exposure to full-stack technologies, and an interest in offensive cyber, vulnerability analysis, and exploit development. The selected candidate will support technical research, software development, and vulnerability exploitation activities that directly inform mission owners and critical security operations. We're looking for someone who is curious, technically motivated, and interested in growing within reverse engineering, vulnerability research, and offensive cyber capability development.

What You'll Do

• Perform software development in support of mission-focused cyber operations
• Support reverse engineering and vulnerability research activities
• Leverage analysis tools such as disassemblers, decompilers, and debuggers
• Research adversary tactics, techniques, and procedures to support mission objectives
• Assist in developing exploitation capabilities for Linux environments
• Take defined vulnerabilities from concept through exploited proof of concept
• Analyze operating systems, application behavior, and network traffic
• Support offensive cyber operations through vulnerability analysis and exploitation
• Contribute to new cyber operations concepts, tradecraft, and technical approaches
• Collaborate with engineers, researchers, and mission stakeholders

• 2+ years of experience with software development

• 2+ years of experience working with full-stack technologies, including Java and scripting languages such as JavaScript or Python

• Experience developing exploitation capabilities for Linux environments

• Experience taking a defined vulnerability from concept to exploited proof of concept

• Knowledge of operating systems, including: o Windows o Linux o macOS o iOS o Android

• Understanding of application behavior and network traffic analysis to identify malware and exploits

• Bachelor's degree or equivalent experience

• Must be a US Citizen

• Top Secret security clearance, + Experience with reverse engineering tools such as Ghidra, IDA Pro, Binary Ninja, or similar

• Experience using debuggers, decompilers, and disassemblers

• Exposure to vulnerability research or exploit development

• Experience with offensive cyber operations or CNO concepts

• Experience with scripting and automation

• Experience analyzing malware, suspicious binaries, or exploit behavior

• Familiarity with mobile operating systems, embedded systems, or low-level software analysis

• Experience supporting government, DoD, Intelligence Community, or law enforcement customers

• Active TS/SCI clearance preferred

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 embedded security and reverse engineering. Our work directly supports national security missions and requires a high level of technical ownership, creativity, and precision. If you enjoy working hands-on with hardware, digging into complex systems, and pushing your technical skills further, you'll find this environment both challenging and rewarding.