Staff Software Engineer (Python)

We are looking for a Staff Software Engineer to join the Proofpoint Tessian XFI (Cross Functional Integrations) team. The Tessian XFI team oversees the integration of Tessian inbound threat defence software, via API, to the Microsoft or Google e-mail platforms, and the development of Add-in (currently for Microsoft Office) for data loss prevention (DLP).

You will be joining the team at an exciting time, as the team prepares to furtherly scale the Tessian XFI services and products, following the Proofpoint acquisition. We are also looking to the next steps of integration, with Microsoft, and to integrate deeper with the Proofpoint ecosystem.

The XFI team's tech stack includes:

• Python 3.10


• Other Object-Oriented Programming languages are a bonus.


• AWS Services such as


• SQS, SNS


• ECS, ECR


• Lambda functions


• High volume NoSQL and SQL databases such as


• Dynamo DB


• Postgres


• Terraform built environments.


• DevOps tools and methodologies such as:


• CircleCI pipelines management


• Docker containerization


• Git and GitHub for software versioning


Your day-to-day

In the Tessian XFI Team, we deeply appreciate DevOps 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

You will be expected to:

• Have expertise or unique knowledge that can be used to think outside the box and resolve complex problems.


• Use your skills to contribute to development of company objective and principles and to achieve goals in creative and effective way.


• Work on significant and unique issues where analysis of situations or data requires an evaluation of intangibles.


• Act independently to determine methods and procedures on new or special assignments.


• Supervise the activities of other engineers in the team


• 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.


What you bring to the team

Operating on product integration with the main e-mail platform providers such GSuite 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 factual evidence to justify your arguments and influence the direction of the team.

Our main challenge ahead is scaling, both vertically (size of individual tenants) and horizontally (number of total tenants). We will consider experience working with data and infrastructure at scale as a bonus.

If you are not sure that you exactly fit all the above criteria, please do get in touch anyway. We are always willing to speak to great candidates even if you do not feel you meet every criteria listed!

If you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us!

Proofpoint is a leading cybersecurity company protecting organisations' greatest assets and biggest risks: vulnerabilities in people. With an integrated suite of cloud-based solutions, Proofpoint helps companies around the world stop targeted threats, safeguard their data, and make their users more resilient against cyber-attacks. Leading organisations of all sizes, including more than half of the Fortune 1000, rely on Proofpoint for people-centric security and compliance solutions mitigating their most critical risks across email, the cloud, social media, and the web.

We are singularly devoted to helping our customers protect their greatest assets and biggest security risk: their people. That is why we are a leader in next-generation cybersecurity., Proofpoint has been honored with six Best Places to Work Awards in 2024 by workplace culture leader Comparably, including Best Company Career Growth, Best Company Outlook, Best Global Culture, Best Engineering Teams, Best Sales Teams, and Best HR Teams.

To view additional awards, please visit www.proofpoint.com/us/news#awards

Proofpoint thrives on the invaluable contributions of our diverse workforce, which encompasses a kaleidoscope of lived experiences, thoughts, perspectives, and professional expertise. We attribute much of our success to our people, who are at the core of our organization and embody our people-centric ethos.

We hire the most innovative minds globally to safeguard our customers' sensitive data and intellectual property. Our talented workforce develops and leverages our advanced technology, combining their expertise to provide comprehensive protection against threat actors and mitigate the risks posed by both malicious and negligent employees.

Cyberattacks have the potential to disrupt access to vital resources such as energy, water, transportation, healthcare, and financial services. At Proofpoint, our dedicated team works tirelessly to ensure world-class cyber resilience, protecting approximately 8,000 enterprise customers worldwide.

We are committed to creating a diverse, equitable, and inclusive environment. We work every day to ensure that our employees feel that they are in a community that celebrates their unique identity, cultivates their sense of belonging, and invests in their professional growth. We have 9 employee-led employee inclusion groups which help support both employees and our organization by providing opportunities to network, discuss career and cultural development and uplift the corporate culture to create a more inclusive workplace.

At Proofpoint, we have a passion for protecting people, data, and brands from today's advanced threats and compliance risks. We hire the best people in the business to:

• Build and enhance our proven security platform


• Blend innovation and speed in a constantly evolving cloud architecture


• Analyze new threats and offer deep insight through data-driven intel


• Collaborate with customers to help solve their toughest security challenges



We are singularly devoted to helping our customers protect what matters most. That's why we're a leader in next-generation cybersecurity-and why more than half of the Fortune 100 trust us as a security partner.