Freelance Software Engineer

This short-term contract role is focused on enhancing the security and functionality of RHEL 9 servers by enabling file uploads to Perplexity.ai while maintaining strict egress controls. The position requires a senior Linux and network security engineer to analyze outbound traffic, identify the necessary domains, IPs, and CIDRs for successful uploads, and develop a minimal, auditable, and secure outbound firewall ruleset. The engineer will also be responsible for implementing a command line prototype compatible with Perplexity.ai to validate the solution. The project is urgent and must be completed within 3–5 days, delivering a robust, well‑documented solution suitable for enterprise environments.

Responsibilities

• Analyze outbound network traffic on RHEL 9 servers during Perplexity.ai upload attempts
• Identify all required domains, IP addresses, and CIDR ranges, including Cloudflare-backed endpoints
• Develop and document a minimal, secure...