Optimize & Integrate Self-Hosted PBX -- 2

I need an experienced VoIP engineer to take a self-hosted PBX environment to the next level. You should feel equally at home inside VitalPBX, FusionPBX, Issabel—or be ready to recommend another open-source platform if it serves the brief better—because I want the freedom to switch or combine solutions as requirements evolve.

The immediate goals are clear:
• Design and fine-tune advanced call-routing logic so every inbound and outbound call reaches the right place with minimal delay.
• Build granular, real-time reporting that lets me track performance by queue, agent, and campaign without relying on costly third-party services.
• Bridge the PBX with my existing tools (CRM, help-desk, analytics, or any REST/Open API-friendly system) so data flows automatically and agents work from a single pane of glass.

Ultimately I want full control of my call-centre stack—no lengthy contracts, no hidden carrier fees—while keeping day-to-day administration simple enough to hand over to in-house staff.

Deliverables
1. A production-ready PBX instance (or cluster) running on my server or VPS of choice, fully secured and documented.
2. Tested call flows, queues, IVRs, and fail-over routes that meet the routing rules we agreed on.
3. Custom or pre-built reporting dashboards configured to show live and historical metrics.
4. Completed integrations with at least one external system (e.g., Bitrix 24, other ATS/CRM or a bespoke app) plus clear instructions for adding more.
5. A short handover session and written admin guide so I can manage extensions, trunks, and updates without outside help.

If you’ve deployed or migrated multi-tenant VoIP set-ups before and can demonstrate creative problem-solving around SIP, WebRTC, and open-source telephony stacks, let’s talk.