Senior Software Engineer

Role Description

We are looking for a Senior Software Engineer to join the Cobalt Strike engineering team. This is a hands-on engineering role focused on building and maintaining systems-level capabilities in a complex security product. You should be comfortable writing C, working in an existing Java codebase, and reasoning about low-level Windows behavior. You do not need to have a red team background, but you should be curious about how operating systems, security controls, and adversary techniques work under the hood.

• Design, implement, test, and maintain core Cobalt Strike functionality across native and Java-based components.
• Write high-quality C code for cross-platform capabilities, including Windows, Linux, and macOS, where reliability, maintainability, performance, and correctness matter.
• Work with Java-based components of the product, including feature development, maintenance, debugging, and integration of work.
• Debug complex issues across native code, Java code, Windows behavior, and customer environments.
• Collaborate with engineers, product managers, security researchers, QA, support, and other teams to design practical, maintainable solutions.
• Translate product ideas, customer needs, and security research into well-engineered product capabilities.
• Participate in design discussions, code reviews, testing, documentation, and Agile planning.
• Help improve engineering practices, internal tooling, build processes, reliability, and long-term maintainability.
• Serve as a technical resource for areas where you have deep expertise.

Qualifications

• Strong professional experience developing in C.
• Experience with Java, or the ability and willingness to work effectively in an existing Java codebase.
• Working knowledge of low-level operating system internals, especially Windows, with familiarity in Linux and/or macOS internals considered a plus.
• Experience designing, maintaining, and debugging complex production software.
• Strong problem-solving and analytical skills, with keen attention to detail.
• Ability to work independently on complex technical problems while communicating clearly with the team.
• Experience using Git and participating in code reviews in a collaborative engineering environment.
• A practical approach to software quality, including testing, documentation, maintainability, and secure coding practices.
• Strong written and verbal communication skills.
• High ethical standards and sound judgment, especially when working with offensive security technology.

Requirements

• Experience with offensive security, red teaming, penetration testing, threat emulation, reverse engineering, malware analysis, endpoint security, or related security disciplines.
• Experience with Windows debugging or analysis tools such as WinDbg, Visual Studio Debugger, Process Monitor, Process Explorer, x64dbg, or similar tools.
• Experience with Python, scripting, build automation, compiler toolchains, or low-level debugging workflows.
• Experience applying AI/ML tools, including LLMs or coding agents, to improve software engineering workflows such as code analysis, debugging, testing, documentation, or developer productivity.
• Experience with compiler toolchains such as MinGW/LLVM, with a strong understanding of how compilation, linking, optimization, and binary generation work under the hood.

Benefits

• Health, dental, and vision coverage as of hire.
• Immediate enrollment in 401(k), HSA, and FSA plans.
• Flexible PTO policy.
• Tuition and personal enrichment reimbursement.
• Option to enroll in ID Theft Protection Program.