Senior Software Engineer - Email Security Platform

Responsibilities

• Work with Rspamd as a core detection engine.
• Consume scores, symbols, metadata, and verdicts to drive policy decisions.
• Apply email security fundamentals, including DKIM, SPF, DMARC, header, and MIME analysis.
• Evolve support for multiple scanners and signal sources.
• Build and maintain high-throughput services in Go.
• Work with Redis Streams or queue-based pipelines, ensuring ordering, retries, idempotency, and backpressure management.
• Ensure safe and predictable behavior under failure conditions.
• Manage durable state, cursors, and metadata in PostgreSQL.
• Maintain clear state ownership and data boundaries.
• Avoid unnecessary coupling between services.
• Design and maintain versioned APIs for frontend dashboards and internal tools.
• Expose detections, verdicts, actions, and audit trails reliably.
• Ensure clear schemas and backward compatibility.
• Integrate with AI or ML services using existing pipelines.
• Safely send structured email data and consume results.
• Handle latency, failures, and partial responses while applying guardrails and deterministic fallbacks.
• Develop services that run reliably on Kubernetes.
• Collaborate with DevOps on deployments, scaling, and operations.
• Debug production issues while respecting existing infrastructure.
• Prioritize observability, reliability, and predictable production behavior.
• Work with Microsoft Graph API and Google Workspace/Gmail integrations.
• Understand provider behavior, limits, and edge cases.
• Evolve integrations without full re-architecture.
• Own backend architecture and technical direction.
• Review code with security and correctness in mind.
• Mentor engineers on distributed systems, event-driven design, and defensive programming.
• Advocate for long-term stability over short-term changes.

Requirements

• Strong experience building backend systems in Go.
• Hands-on experience with event-driven or streaming architectures.
• Proficiency with Redis or similar queue systems.
• Experience designing and maintaining production APIs.
• Experience working in Kubernetes-based environments.

Nice to have

• Email security or phishing detection experience.
• Hands-on experience with Rspamd.
• Experience integrating AI or ML services in production.