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Proofpoint Senior Software Engineer - Threat Detection in London, United Kingdom

It's fun to work in a company where people truly BELIEVE in what they're doing!

We're committed to bringing passion and customer focus to the business.

Corporate Overview

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’s why we’re a leader in next-generation cybersecurity.

Job Overview

Following the acquisition of Tessian by Proofpoint and having found exceptional product/market fit for our category-defining Human Layer Security software platform, we’re in the midst of transformation and growth and are looking for an experienced Threat Intelligence Engineer to join the Tessian Business Unit of Proofpoint.

In this role you will have a direct impact on Tessian products and be part of a growing cross-functional team working closely with Data Science and Engineering. Working with email metadata, behavioral signals, and threat feeds, you will help improve the efficiency of our threat intelligence workflows and approach these solutions with a threat intelligence research background.

Responsibilities and Duties

This role will be split into two key areas, with 70% of your time spent building and improving tooling for the threat intelligence team in order to improve efficiency and the speed at which we can craft new detections, and the other 30% spent helping research emerging threats.

Our stack is predominantly Python based, using a variety of datastores and runs in AWS. 

Role and responsibilities of the job include:

  • Working with Threat Intelligence analysts to get detections into production quickly, so we can react to new and emerging threats.

  • Leveraging our threat intelligence infrastructure to build advanced detections. 

  • Maintaining and improving threat intelligence infrastructure and tooling. 

  • Working closely with our Threat Engineering team and wider Inbound Product team.

  • Coding in Python.

  • Research and improve model efficiencies for advanced detection.

  • Researching advanced email attacks to understand the underlying tactics used to bypass our systems.


  • Passion for security and reacting to threats in real-time.

  • Experience in a security-centric role, as well as experience in a software engineering role is a plus.

  • Threat research/intelligence background is a plus, with a focus on email delivered threats.

  • Excellent Python and SQL skills.

  • Worked with databases and repositories.

  • Previous experience with event driven, distributed systems.

  • Experience working in cloud environments.

  • Ability to break down ambiguous problems into concrete, manageable components and think through optimal solutions.

  • Enjoys digging into complex operations.

  • Takes a high degree of ownership over their work.

Why Proofpoint

Protecting people is at the heart of our award-winning cybersecurity solutions, and the people who work here are the key to our success. We’re a customer-focused and driven-to-win organisation with leading-edge products. We are an inclusive, diverse, multinational company that believes in culture fit, but more importantly ‘culture-add’, and we strongly encourage people from all walks of life to apply.

We believe in hiring the best and the brightest to help cultivate our culture of collaboration and appreciation. Apply today and explore your future at Proofpoint! #LifeAtProofpoint

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

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

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.

Proofpoint is an equal opportunity employer, we hire without consideration to race, religion, creed, color, national origin, age, gender, sexual orientation, marital status, veteran status or disability.

Proofpoint is an equal opportunity employer, we hire without consideration to race, religion, creed, color, national origin, age, gender, sexual orientation, marital status, veteran status or disability.