About Us:

Proofpoint is a global leader in human- and agent-centric cybersecurity. We protect how people, data, and AI agents connect across email, cloud, and collaboration tools. Over 80 of the Fortune 100, 10,000 large enterprises, and millions of smaller organizations trust Proofpoint to stop threats, prevent data loss, and build resilience across their people and AI workflows. Our mission is simple: safeguard the digital world and empower people to work securely and confidently. Join us in our pursuit to defend data and protect people.

How We Work:

At Proofpoint you’ll be part of a global team that breaks barriers to redefine cybersecurity guided by our BRAVE core values:

Bold in how we dream and innovate

Responsive to feedback, challenges and opportunities

Accountable for results and best in class outcomes

Visionary in future focused problem-solving

Exceptional in execution and impact

About the role:

We are looking for a highly experienced Principal Software Engineer to lead the design and development of a network agent/driver for the macOS

environment. This is a hands-on, high-impact role requiring deep technical expertise in networking, system architecture, and macOS development. You will play

a key role in shaping core components, influencing technical direction, and delivering robust, high-performance solutions.

Key Responsibilities:

Architecture & Design:

- Lead the design and implementation of a macOS-based network agent/driver

- Define scalable, secure, and high-performance system architectures

- Evaluate technical trade-offs and make strategic engineering decisions

Development:

- Build and maintain core components in Objective-C and/or Swift for macOS

- Develop low-level networking functionality and integrations

- Contribute to backend or cross-platform components using Golang

- Drive best practices in code quality, testing, and maintainability

Collaboration:

- Work closely with product, security, and infrastructure teams

- Translate product requirements into technical solutions

- Contribute to cross-functional initiatives and architectural discussions

Required Qualifications:

- Bachelor’s or Master’s degree in Computer Science or related field

- 6+ years of professional software engineering experience

- Strong expertise in networking concepts (TCP/IP, sockets, protocols, packet flow, etc.)

- Proven experience in system design and architecture

- Hands-on experience building macOS applications using Objective-C and/or Swift

- Experience developing system-level or agent-based software

Preferred Skills:

- Passion for building reliable, scalable, and secure systems

- Experience with macOS system, networking frameworks

- Familiarity with security and endpoint protection technologies

- Background in performance optimization and debugging low-level issues

- Experience working in distributed or cross-platform environments

- Proactive, self-driven, and able to operate with a high degree of autonomy

Why Proofpoint?

At Proofpoint, we believe that an exceptional career experience includes a comprehensive compensation and benefits package. Here are just a few reasons you’ll love working with us:

• Competitive compensation

• Comprehensive benefits

• Career success on your terms

• Flexible work environment

• Annual wellness and community outreach days

• Always on recognition for your contributions

• Global collaboration and networking opportunities

Our Culture:

Our culture is rooted in values that inspire belonging, empower purpose and drive success-every day, for everyone.

We encourage applications from individuals of all backgrounds, experiences, and perspectives. If you need accommodation during the application or interview process, please reach out to [email protected].

How to Apply

Interested? Submit your application along with any supporting information- we can’t wait to hear from you!