Leul M.

I am a SaaS, CRM, and VoIP Systems Engineer with strong experience building scalable, secure, and real-time applications. I help startups and businesses design, develop, and maintain high-availability SaaS platforms, especially those involving telephony, WebRTC, AI-driven voice systems, and backend reliability. "I design systems that work in production." What I Specialize In -SaaS & CRM Development -Multi-tenant SaaS architecture -Custom CRM systems -Subscription-based platforms -Role-based access & authentication -API-first backend design -Performance optimization & scalability Frontend (Web & Mobile Web Apps) -Next.js, React, Redux -WebRTC for real-time communication -Responsive & mobile-friendly interfaces -Sip.js Backend & APIs -Python / Django (Primary Stack) -PHP -RESTful & async APIs -Secure authentication & authorization -Background jobs & task queues VoIP, AI & Real-Time Communication -Asterisk / FreePBX (IVR, Queues, AMI, Call Routing) -Kamailio (SIP routing, load balancing, multi-tenant setups) -FreeSWITCH (B2BUA) -WebRTC ↔ SIP integration -VoIP gateways (FXO/FXS), ISDN -STIR/SHAKEN -ASR & AI-powered voice automation (transcription, IVR, call intelligence) High-availability telephony systems -Databases & Reliability -PostgreSQL (master-slave replication: sync & async) -MySQL / MariaDB -SQLite -Backup strategies & failover planning Infrastructure & DevOps -Linux (Ubuntu, Parrot OS) -Bash scripting & automation -Nginx, Apache -VPS setup & production deployments -SSL/TLS, DNS configuration -cPanel environments -Server monitoring & troubleshooting -Workflow automation using n8n (VoIP, CRM, AI & SaaS integrations) Networking & Operations -CCNA-level networking (academic + real-world experience) -VPNs, firewalls, secure access -Incident response & client communication -On-site & remote IT support Additional Skills -Telegram Bot development -Testing & debugging -Java, C++ -Arduino-based hardware projects -LiveKit -Conversational AI Why Clients Hire Me -Rare SaaS + VoIP + AI + CRM expertise -Production-ready system design -Clear communication & fast issue resolution -Experience with real-time and mission-critical systems -Long-term maintenance & scaling mindset Commitment -I am 100% committed to delivering reliable, secure, and scalable solutions that meet real business needs. "If you’re building or maintaining a SaaS, CRM, or VoIP platform, I’d be happy to help."