Staff Full-Stack Software Engineer - Mission Control (Satori)

About Proofpoint

Proofpoint stands as a global leader in cybersecurity that focuses on human and agent-centered protection. Our technology secures interactions involving people, data, and AI agents across channels like email, cloud services, and collaboration platforms. Trusted by over 80 Fortune 100 companies, 10,000 large enterprises, and millions of smaller businesses, we specialize in preventing threats, safeguarding data, and enhancing reliability in people and AI workflows. Our mission is straightforward: defend the digital environment and enable people to work safely and confidently.

Work Culture and Values

At Proofpoint, you will join a worldwide team dedicated to pushing the boundaries of cybersecurity innovation, guided by our BRAVE principles:

• Boldness in dreaming and innovating
• Responsiveness to feedback and challenges
• Accountability for high-quality results
• Visionary approach to future challenges
• Exceptional execution and impact

Role Overview

We are seeking a Staff Full Stack Engineer to join our Satori platform team, which is an enterprise AI agent system shaping the future of autonomous security operations. Satori orchestrates capabilities across the Proofpoint suite and third parties to deliver security outcomes.

In this pivotal role, you will lead the development of Mission Control — the interface and API suite used by Fortune 500 clients to deploy, monitor, and manage AI security agents effectively.

Key Responsibilities

• Define technical strategies for the Mission Control UI, including full-stack React frontend development, associated APIs, and automation for deployment and testing.
• Bridge collaboration between product teams, designers, and backend engineers by implementing Figma designs, identifying early gaps, and removing blockers.
• Create a customer-facing experience that makes advanced AI agents transparent, manageable, and reliable around the clock at an enterprise scale.
• Thrive in a dynamic, rapidly scaling environment, collaborating across multiple engineering and product teams with significant capacity for impactful contributions.

Required Qualifications and Skills

• Availability to work onsite four days a week at our Belfast office.
• Extensive hands-on experience building large-scale systems using JavaScript, TypeScript, or a similar language.
• Proficiency in React and TypeScript paired with experience supporting UI backends such as Rails, Swing, Node.js, or equivalents.
• Experience or enthusiasm to quickly learn micro-frontend (MFE) architecture.
• Expertise in cloud-native development, deployment automation, and container technology; familiarity with AWS is advantageous.
• Strong design sensibility and attentiveness to user experience.
• Ability to analyze API contracts meticulously, identify gaps, and proactively communicate issues early.
• Knowledge of front-end security best practices, web standards, and accessibility considerations.
• Robust debugging capabilities.
• Excellent organizational skills and aptitude to coordinate effectively with colleagues internationally.
• Leadership and communication skills including mentoring peers and managing stakeholder relationships.
• A proactive mindset focused on execution despite uncertainty.
• Willingness to join an on-call rotation aligned with US-based team members.
• Interest in agent-generated UI technologies and how user interfaces adapt to automated content generation.
• Bachelor’s or Master’s degree in Computer Science, related discipline, or equivalent experience.

Preferred Additional Experience

• Background with AI-assisted development tools such as Claude Code or Codex and familiarity with agentic communication protocols like A2A or MCP.
• Experience processing large-scale event streams is a plus.

Why Join Proofpoint?

• Competitive remuneration package
• Comprehensive benefits program
• Opportunities for career progression tailored to your ambitions
• Flexible working environment
• Annual wellness and community outreach initiatives
• Consistent recognition for your contributions
• Global networking and collaborative opportunities

Culture and Inclusion

Our culture values inclusivity, drives purpose, and supports daily success for all. We welcome applicants from diverse backgrounds and provide accommodations during recruitment on request.