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Sr. Software Engineer (NodeJS, TypeScript, AWS)

Proofpoint

Belfast

Hybrid

GBP 55,000 - 75,000

Full time

6 days ago
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Job summary

Join Proofpoint as a Sr. Software Engineer and contribute to the development of critical integrations for secure email traffic. Leverage your skills in NodeJS, TypeScript, and AWS to enhance systems processing millions of transactions daily. Be part of a dynamic team that promotes a DevOps culture, focused on solving complex challenges in cybersecurity.

Benefits

Learning & Development programs
Flexible work environment
Annual wellness and community outreach days
Recognition for contributions
Global collaboration and networking opportunities

Qualifications

  • Proven experience with NodeJS and TypeScript for backend development.
  • Extensive experience with AWS services including Lambda and ECS.
  • Experience with Docker for containerization and deployment.

Responsibilities

  • Design and build reliable distributed systems with low latency.
  • Maintain and support business-critical systems focused on scale.
  • Ship code to production weekly using CI/CD practices.

Skills

NodeJS
TypeScript
AWS Lambda
Docker
SQL
NoSQL
SMTP protocol

Education

Bachelor's degree in Computer Science or related field

Tools

AWS ECS
AWS EC2
CloudWatch
DynamoDB
Postgres

Job description

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Sr. Software Engineer (NodeJS, TypeScript, AWS), Belfast

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Client:

Proofpoint

Location:

Belfast, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Reference:
Job Views:

3

Posted:

29.06.2025

Expiry Date:

13.08.2025

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Job Description:

About Us:
We are the leader in human-centric cybersecurity. Half a million customers, including 87 of the Fortune 100, rely on Proofpoint to protect their organizations. We’re driven by a mission to stay ahead of bad actors and safeguard the digital world. 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.

Corporate Overview
Proofpoint is a leading cybersecurity company protecting organizations’ 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 organizations 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. Protection Starts with People. Proofpoint.

The Role

We are looking for a Sr. Software Engineer to join the Proofpoint Tessian Flow team. This team oversees the development of some key customer integrations, among them is a Mail Transfer Agent (MTA) that processes inbound and outbound emails, an Outlook COM Add-in and several others.

You will be primarily working on the Tessian MTA server which is highly optimised for secure email traffic and integrates with M365, G-Suite and Exchange Server, for both inbound and outbound traffic. It currently serves millions of inbound, outbound and journal email transactions, every day, across the world.

You will be joining at an exciting time, as the team prepares to further scale the Tessian MTA server following the Proofpoint acquisition. We are also looking to transition to a new multi-tenant architecture, and to integrate deeper with the Proofpoint ecosystem.

In our Flow Team, we deeply embrace the DevOps culture, as we design, build, test, deploy and monitor the integrations. Our day to day involves developing the integrations mentioned above for scale; researching and implementing security measures; and monitoring production environments to discover what’s next for the team using product data.


You’ll be expected to:

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 weekly using CI/CD

Tackle the challenges that come with processing highly sensitive data

Learn to build with security in mind

Mentor other engineers, review design documents and code, and provide leadership in solving complex technical challenges

Make your mark on ambitious projects

What you bring to the team

Operating a mail transport agent, is an interesting challenge with significant technical complexity, especially when considering the scale of our traffic and our security guarantees.

Proven experience with NodeJS and TypeScript for backend development

Extensive experience with AWS Lambda, ECS, EC2, CloudWatch

Experience with Docker for creating and deploying containers

Prior experience with structured languages and desire to learn .NET

Leading engineering projects, ensuring their planning, coordination, and execution


Beneficial Experience

High volume NoSQL and SQL databases such as; Dynamo DB, Postgres

SMTP protocol, network interfaces

Experience working with data and infrastructure at scale

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’ll 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.

Why Proofpoint
Protecting people is at the heart of our award-winning lineup of cybersecurity solutions, and the people who work here are the key to our success. We’re a customer-focused and a driven-to-win organization 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

#LI-CB1

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:

• Learning & Development: We are committed to the growth and development of our team members, offering a range of programs including leadership and professional development workshops, stretch project assignments, and mentoring opportunities to help employees reach their full potential.

• Flexible work environment: [Remote options, hybrid schedules, flexible hours, etc.].

• 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 . How to Apply Interested? Submit your application here . We can’t wait to hear from you!

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