Sr. Software Engineer; Python, C

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.

Half a million customers, including 87 of the Fortune 100, rely on Proofpoint to protect their organizations.

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 looking for a Senior Software Engineer to join the XFI (Cross Functional Integrations) team within the Cloud Integration Group. The XFI team oversees the integration of Post Delivery Protection & Response threat defence software, via API, to the Microsoft or Google e‑mail platforms, for both inbound and outbound. You will be joining the team at an exciting time, as the team prepares to furtherly scale the XFI services and products and the next steps of integration with Microsoft and in future with other email providers.

The XFI Team, we deeply appreciate Dev Ops culture, as we build the XFI services, and we run it. Our day to day involves improving XFI services scalability and reliability; researching security vulnerabilities and implementing security measures; and monitoring production environments to discover what is next for the team using product data. Our research also includes ways to improve user experience when using our products Outlook clients (desktop and OWA) on both Windows and Mac platforms and to help hardening the Human Security Layer.

• Provide or help providing solution to complex problems
• Design and build reliable distributed systems that handle volumes of data with low latency
• Maintain and support business‑critical systems where scale and latency are front‑of‑mind
• Ship code to production every day using CI/CD
• Tackle the challenges that come with processing sensitive data
• Learn to build with security in mind
• Make your mark on ambitious projects

The XFI team’s tech stack includes:

• Python 3.10 or
• Other Object‑Oriented Programming languages are a bonus
• C# is applicable to one of our key services
• AWS Services such as SQS, SNS ECS, ECR, Lambda functions
• High volume No
  
  SQL and SQL databases such as Dynamo DB, Postgres
• Terraform built environments
• Dev Ops tools and methodologies such as:
  CircleCI pipelines management, Docker containerization, Git and Git Hub for software versioning
• Operating on product integration with the main e‑mail platform providers such Google and Microsoft, is an interesting challenge with significant technical complexity, especially when considering the scale of our traffic and our security guarantees.

Our standards around security, quality, and service availability can only be the highest, but at the same time we foster psychological safety, as we are comfortable with the unknowns and love to experiment to find the right solution, which get things done and keep the eyes on results. We use data to validate our decisions, measuring our progress and success. Data informs our decision making, our goals, and our roadmap.

We are sure you will love joining us if you share our focus on outcomes rather than outputs and leverage…