Staff Software Engineer - AI Agents

Salary: £58,000 - 98,000 per year

Requirements:

• We require the ability to work on-site four days per week at our Belfast office.
• We require extensive experience designing, developing, and supporting applications in a microservices cloud environment.
• We are looking for a strong personal interest in AI agents, including hands-on experience with agent frameworks or LLM SDKs such as LangGraph, OpenAI/Anthropic Agents SDK, MCP, LangChain, or similar.
• We require prior experience taking agentic or LLM-based systems to production, including eval, observability, and rollback considerations.
• We require deep experience with Python; TypeScript/Node is a plus.
• We value hands-on work with agent frameworks and eval tooling.
• We require a track record of debugging distributed systems from traces; experience with OpenTelemetrys GenAI semantic conventions is a plus.
• We require cloud-native development experience, automating deployments, and familiarity with container systems; AWS experience is a plus.
• We require excellent time management skills and comfort coordinating work with colleagues in the US and around the globe.
• We require excellent communication and leadership skills, including driving architectural conversations across teams, managing stakeholders, and mentoring engineers.
• We require a proactive get-it-done attitude and willingness to move forward through uncertainty.
• We require readiness to participate in an on-call rotation during times coordinated with US-based colleagues.
• We require a BSc or MSc in Computer Science or a related field, or equivalent experience.
• Beneficial experience includes AI-driven development tools such as Claude Code or Codex and agentic communication protocols such as A2A or MCP.
• Large-scale event processing is a plus but not required.

Responsibilities:

• We drive the architecture of the Satori platform as it rapidly scales.
• We support fellow product engineers who protect business-critical communications for Fortune 100 customers 24/7/365.
• We design the agent runtimes and SDKs that product teams build on.
• We define what release-ready means at Proofpoint, including eval suites, safety checks, telemetry, and AuthX that gate every rollout.
• We shape how mission-critical agentic software ships across the company through primitives such as prompt management and observability.
• We partner with product tech leads to turn one-off integrations into reusable platform capabilities.
• We ship code and own production-grade services.

Technologies:

• AI
• AI Agents
• AWS
• Claude Code
• Cloud
• Support
• LLM
• MCP
• Python
• TypeScript
• microservices
• Office 365
• NodeJS
• OpenTelemetry
• Security

More:

We are Proofpoint, a global leader in human- and agent-centric cybersecurity. We protect how people, data, and AI agents connect across email, cloud, and collaboration tools, and our mission is to safeguard the digital world while empowering people to work securely and confidently. You will join our global team guided by our BRAVE values: Bold, Responsive, Accountable, Visionary, and Exceptional. We offer a competitive compensation and benefits package, comprehensive benefits, career growth on your terms, a flexible work environment, annual wellness and community outreach days, recognition for your contributions, and global collaboration and networking opportunities. This is a full-time role based in Belfast, Northern Ireland. Our culture is rooted in belonging, purpose, and success, and we encourage applications from individuals of all backgrounds, experiences, and perspectives.

last updated 36 week of 2026