Software Engineer Intern

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

We are seeking a motivated Software Engineer Intern to join our engineering team and contribute to real-world product development using the Microsoft .NET stack. This internship is designed for students or early-career developers who want hands‑on experience building scalable applications, collaborating with professional engineers, and learning modern software development practices.

You will work alongside experienced developers to design, build, test, and improve software systems while gaining exposure to production‑grade architectures, Dev Ops workflows, and agile delivery.

• Develop and maintain features using C# and .NET
• Assist in building backend services, APIs, and web applications
• Write clean, maintainable, and well-documented code
• Participate in code reviews and team design discussions
• Debug issues and help improve application performance and reliability
• Contribute to unit tests and automated testing efforts
• Work with databases and data models (SQL or No
  
  SQL)
• Collaborate with product managers, designers, and other engineers in an agile environment

• Currently pursuing a degree in Computer Science, Software Engineering, or related field
• Working knowledge of C# and the .NET ecosystem
• Understanding of object-oriented programming principles
• Familiarity with REST APIs and basic web concepts
• Basic knowledge of Git version control
• Strong problem‑solving skills and willingness to learn

• Experience with ASP.NET Core
• Familiarity with web frontend technologies (HTML, CSS, JavaScript)
• Exposure to SQL Server, Postgre
  
  SQL, or similar databases
• Understanding of cloud platforms such as Azure or AWS
• Experience building personal, academic, or open‑source projects
• Knowledge of testing frameworks (xUnit, NUnit, MSTest)

• Hands‑on experience shipping production‑quality software
• Mentorship from experienced engineers
• Exposure to professional development workflows (CI/CD, ticketing systems, agile ceremonies)
• Opportunity for full‑time return offer based on performance
• Soft skills we value: curiosity and strong learning mindset, ability to communicate clearly and ask good questions, ownership and follow-through on assigned work

• 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 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

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