Sr. Software Engineer (Backend, Cloud)

CompanyProofpoint

LocationBelfast, Northern Ireland, United Kingdom

Posted At1/16/2026

UK Visa Sponsorship Analytics

Analytics are greyed out due to low classification confidence (51.0%).

Occupation Type

Programmers and software development professionals

Occupation Code Skill LevelHigher Skilled

Sponsorship Salary Threshold

£54,700 (£28.05 per hour)

Occupation rate applies

Above analytics are generated algorithmically based on job titles and may not always be the same as the company's job classification. You can also check detailed occupation eligibility, and salary criteria on our UK Visa Eligible Occupations & Salary Thresholds page.

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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

You will be joining at an exciting time, as the team prepares to scale the Tessian product following the Proofpoint acquisition. Tessian protects every business’s mission by securing the human layer.

We’re building intelligent security that works for human beings as they are, not how security policies would like them to be. The Tessian Cloud Email Security platform helps enterprises defend against email attacks, protect against data loss, and respond to security incidents more efficiently. Using machine learning technology, Tessian automatically predicts and eliminates advanced threats on email caused by human error, such as data exfiltration, accidental data loss, business email compromise, and phishing attacks .

We’re growing and are looking for new team members to help us build something special. Having found exceptional product/market fit for our category-defining Human Layer Security software platform, we’re looking to capitalize on the huge demand for our product.

Your day-to-day

We‘re looking for a Senior Backend Engineer to join one of the key teams at Tessian, responsible for protecting our customers from the full spectrum of Data Loss risks. In this role, you will work cross-functionally to

Engage with the world of Python 3 and AWS, architecting robust distributed systems designed to manage immense volumes of data with exceptional speed.
Collaborate across various functions, harnessing team synergy to deliver premium solutions and outcomes for our esteemed customers.
Apply your keen product mindset and tech savvy to help shape Defender's future, contributing to our progressive vision.
Cultivate a supportive environment by providing thoughtful, actionable feedback, fostering growth and development among team members.
Embrace the responsibility of maintaining and supporting our essential business systems, always mindful of the interplay between scale, latency, and cost.
Take on the complex task of processing highly sensitive data, a challenge that will refine your skills in data security and handling.
Guide and support your team members, enhancing the team's effectiveness and productivity by applying your knowledge and experience.

Spearhead cross-team projects, guiding them from their conception through to their deployment in production.

What You Bring To The Team

Possess extensive experience in Backend development (Codebase is Python, but can consider transition from Java or .NET)
Public cloud exposure with AWS, Azure or GCP
Track record of working at scale and solving diverse technical challenges
Product-focused mindset, understanding the impact of your decisions on customers and the organization
Ability to proactively identify and solve problems before they impact progress
Be willing and able to lead and shape the technical direction of projects, aligning with business goals
Mentor peers, sharing knowledge and fostering a culture of continuous improvement.
Demonstrate advanced problem-solving abilities, navigating complex challenges with innovative solutions
Collaborate effectively with cross-functional teams, influencing outcomes and driving project success
Excel in communication, capable of empathetic and constructive dialogue in both technical and non-technical settings with a varied audience

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

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 accessibility@proofpoint.com.

How To Apply

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