Staff Engineer

The role

You will design and build agent capabilities, investigation quality evaluations, and platform architecture. This is a hands-on role focused on extending agent tools and maintaining services as the platform grows.

What you will do

• Adding investigation tools and integrations with security data sources
• Improving how agents manage context, recall evidence, and trade off cost against latency
• Building evaluations to show whether agents reach correct, well-sourced findings
• Using evaluations to decide model, prompt, and tool changes
• Evolving service boundaries and failure handling
• Raising practices for API governance, testing, and observability
• Working with product management to turn case needs into technical specifications

Required qualifications

• Designed and shipped distributed systems that are still running in production years later
• Experience in a Staff, Principal, or Lead role
• Taken AI agents from prototype to production across multiple model providers
• Built tool-calling agent loops, evaluation harnesses, and guardrails against hallucination
• Build with coding agents every day and know how to review and verify what they produce
• Deep expertise in Go or Python and strong in the other
• Worked across a relational system of record, columnar analytical stores, and vector search
• Run zero-downtime schema migrations
• Designed schema-first, contract-driven APIs with generated clients and built-in validation
• Built long-running workflows on durable execution and event streaming
• Built event-driven ingestion pipelines that move large volumes of structured data

Nice to have

• Experience with a major cloud provider, infrastructure as code, and container orchestration
• Experience building security products, or familiarity with digital forensics, incident response, or security telemetry

About the company

MOXFIVE helps enterprises respond to, recover from, and build resilience against cyber attacks. They are building an AI investigation platform.