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About the Role
Join the Endpoint Data Protection team to work on endpoint sensor technology that runs continuously and reliably on corporate machines across Windows, macOS, and Linux. You will work at the lowest levels of the operating system, building kernel drivers and Endpoint Security extensions that power how Incydr detects and stops data loss and insider risk. You will build features end to end, from early research and proof of concept through production at scale. Mimecast is an AI-First engineering organization, and we're looking for someone genuinely curious about working this way and securing AI-driven workflows.
Responsibilities
- Implement features and fixes within our Windows, macOS, and Linux agents, starting with well-scoped pieces and growing toward owning small features end to end.
- Work at the OS boundary on kernel-mode components and Endpoint Security and Network Extensions, developing greater independence as you build platform depth.
- Contribute to detection paths and inline enforcement logic, progressing from guided implementation toward ownership of specific paths.
- Integrate agent capabilities with backend and product workflows, initially through existing integration points and later by designing new ones.
- Build observability, performance, and stability into always-on production components, supported by mentorship from senior engineers.
- Develop a security-first mindset by reasoning about untrusted input, evasion, and insider risk—not just external attackers.
- Explain and defend the code you ship in review, including code drafted with AI assistance, and demonstrate why it is correct rather than relying only on passing results.
Requirements
- Experience building production software through professional work, internships, coursework, or hands-on personal projects, with readiness to deliver well-scoped work and grow toward owning small features independently.
- Sound C++ fundamentals, including an understanding of memory management, concurrency, and performance trade-offs.
- Interest in systems programming on Linux, macOS, or Windows, with hands-on exposure to areas such as kernel-mode drivers, Windows Filtering Platform, Endpoint Security or Network Extensions, eBPF, or similar technologies.
- Ability to read and understand existing software architecture and make small, sound architectural decisions as your scope grows, including decisions around interface boundaries and extensibility.
- A security-curious mindset and the ability to reason about adversarial behavior and insider risk.
- Comfort using AI coding assistants, paired with the discipline to independently verify, understand, and take responsibility for their output.
- Coachability and a track record of turning feedback into stronger design and code quality over time.
Skills
- C++
- Systems programming
- Kernel-mode drivers
- Windows Filtering Platform
- Endpoint Security Extensions
- Network Extensions
- eBPF
- AI coding assistants
- Rust
- Swift
- Systems-level Linux development
- Network-layer monitoring
- Data security
- Data loss prevention
- Enterprise software shipping
- GitHub projects
- Technical blog
Location
- Massachusetts
Work Type
- Full-time
Experience Level
- Entry-level
- Junior
Salary/Compensations
- $100,000-$150,000
Benefits
- Benefits
- Incentive plans
About the Company
- The work people build is worth protecting, and it's harder to protect than it used to be. AI agents now move at machine speed with human-level access, and a small slip-up can become a very public one. Mimecast disrupts cybercriminal activity before that happens. We think fast, go big, and always demand more of ourselves. We work hard, deliver, and repeat. We grow with real determination and put success well within reach. We push each other to be better and expect to be pushed back, in a community built on respect, where everyone is counted.
Equal Opportunity
- We are proud to be an Equal Opportunity and Affirmative Action Employer, and we’d encourage you to join us whatever your background. We particularly welcome applicants from traditionally underrepresented groups.
- We consider everyone equally: your race, age, religion, sexual orientation, gender identity, ability, marital status, nationality, or any other protected characteristic won’t affect your application.
- If you require any adjustments or accommodations due to a disability, or any other reason that may help you in your interview process, please let us know by emailing careers@mimecast.com.
- Due to certain obligations to our customers, an offer of employment will be subject to your successful completion of applicable background checks, conducted in accordance with local law.
- It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment.