Software Engineer II

Proofpoint; Belfast City District; On-site; GBP 75,000 - 95,000; Full time

Benefits offered by this job

Competitive compensation

Comprehensive benefits

Flexible work environment

Global collaboration and networking

Job summary

Proofpoint is seeking a Software Engineer II to join a AEDLP team that develops the Microsoft 365 add-in for Outlook, ensuring scalable, secure data loss prevention across email platforms.

You will work with Python, AWS, and infrastructure-as-code tools, contributing to production services and elevating the security posture while collaborating with senior engineers on complex problems.

Qualifications

• Building production services in Python.
• Experience with AWS and SQL/NoSQL databases.
• Familiarity with CI/CD, containers and infrastructure as code.
• Security-first mindset when choosing technical approaches.

Responsibilities

• Improve scalability and reliability of services.
• Research security vulnerabilities and implement protections.
• Use production data to inform what to build next.
• Improve the Outlook add-in UX on Windows and Mac.
• Harden the 'Human Security Layer' within the product.
• Ship code to production via CI/CD pipelines.
• Handle sensitive data with care and security.

Skills

Python

AWS

CI/CD

Security-first

Tools

Terraform

Docker

Git

GitHub

React

Job description

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.

The Role

We are looking for a Software Engineer II to join one of our Adaptive Email Data Loss Prevention (AEDLP) teams. The team owns Proofpoint’s Microsoft 365 add-in (currently for Outlook), which helps organisations stop sensitive data leaving through email. As we scale our services, deepen our integration with Microsoft, and align more closely with the wider Proofpoint ecosystem, you will help shape what comes next.

Technical Stack

• Languages: Python 3 (JavaScript, React or other languages are a bonus)
• AWS: SQS, SNS, ECS, ECR, Lambda
• High-volume NoSQL and SQL databases, such as DynamoDB and Postgres
• Infrastructure as code: Terraform
• DevOps tooling: CircleCI, Docker, Git and GitHub

Responsibilities

• Improve the scalability and reliability of our services
• Research security vulnerabilities and implement security measures
• Use production and product data to decide what the team builds next
• Improve the user experience of our add-in in Outlook (desktop and Outlook on the web) on Windows and Mac
• Help harden the “Human Security Layer”
• Ship code to production continuously via CI/CD
• Handle sensitive data with care, and build with security in mind
• Work with senior and staff engineers on complex problems, and independently on simpler ones

What you’ll bring

Essential Experience

• Building and running production services in Python
• Experience with AWS and with SQL or NoSQL databases
• Familiarity with CI/CD, containers and infrastructure as code
• Good judgement when choosing technical approaches, and a security-first mindset

Desirable Experience

• Experience with JavaScript/React
• Experience with data and infrastructure at scale

How we work

Integrating our product with email platforms such as Google and Microsoft is technically complex, especially at our scale and with our security requirements. Our standards for security, quality and availability are the highest, but we also foster psychological safety: we are comfortable with the unknown and love to experiment to find the right solution. We use data to validate our decisions and measure our progress, and it shapes our goals and roadmap. We think you’ll thrive here if you focus on outcomes rather than outputs and use evidence to back your arguments and influence the team’s direction.

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

Be empowered to reach your full potential through meaningful challenges and personalized support—designed around you and your goals. Whether you're growing as a leader or leveling up from great to exceptional as an individual contributor, we’re here to help you get there.

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 [e-mail].

Proofpoint has been honored

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.

Equal Opportunity Employer

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.

Find your network, your allies, and your biggest fans. We know that work is simply better when you’re surrounded by people who inspire you—who share ideas, cheer you on, and genuinely want to see you succeed. That’s why we offer social circles, sponsored networks, and connection points across teams and time zones—to help you find your people, build your community, and thrive together. This isn’t just a job—it’s a mission to protect people and defend data in a world that never slows down. We’re building the future of human-centric cybersecurity, and that future belongs to all of us. We take ownership, move fast, and hold ourselves accountable—because that’s what it takes to stay ahead. And we do it together, winning as one.