# Mohammad Abu Syed — Linux, Cloud, Network & VoIP Infrastructure Engineer

> Freelance infrastructure engineer based in Dhaka, Bangladesh (GMT+6), working remotely with clients worldwide. 15+ years running production Linux server fleets, IP networks, clouds and carrier-grade VoIP for telcos, cloud providers, call centres and businesses. 4.9★ from 104 client reviews on Freelancer.com (member since 2012). Offers fixed-price projects and monthly infrastructure care.

Website: https://asyed.pro/
Contact: hello@asyed.pro · WhatsApp: https://wa.me/free.syed · Telegram: https://t.me/free_syed

## Own products (sold through AsteriskBD, https://asteriskbd.com, founded 2012)

- Saynth Multi-Tenant PBX: white-label cloud PBX platform for telcos, ISPs, MSPs and resellers. Unlimited tenants, multi-tier resellers, per-tenant billing, features and branding, auto-provisioning for Yealink, Grandstream, Polycom and Fanvil phones, REST API for BSS/OSS, branded softphone apps.
- AI Voice Agent: 24/7 AI phone agent with natural-language understanding, multi-language voice, human handoff, CRM and ticketing integration, sentiment analysis and analytics.
- Sales AI Ops: outbound AI calling for lead qualification and appointment booking, with 12 CRM integrations (Salesforce, HubSpot, Zoho, Pipedrive and more).
- Telco AI Gateway: SIP-to-AI gateway that adds AI voice to existing SIP trunks and switches, with multiple AI providers, load balancing, failover and CDRs.
- Cloud PBX Hosting: managed hosted PBX from $12/month, 99.9% uptime SLA, daily backups, free migration (https://asteriskbd.com/hosting).
- IP PBX and call centre: Asterisk, FreePBX, Issabel and VICIdial deployed and managed.

## Services

- VoIP, PBX and call centres: Asterisk, Kamailio SIP proxies, VICIdial, FreePBX, SIP trunks and DIDs, cloud telephony, AI voice agents, call-quality troubleshooting (NAT, SIP ALG, QoS, jitter).
- White-label SIP apps for business phone systems: branded softphones for Android, iOS, macOS and Windows that connect to the client's PBX (Asterisk, FreePBX, Kamailio or a custom platform), published under the client's own App Store and Google Play accounts. Features include PBX auto-provisioning, office extension on mobile and desktop, hold/transfer/DND, incoming calls while the phone sleeps, SMS/MMS, voicemail with transcripts, CRM screen pop and BLF keys. Built for VoIP providers, hosted-PBX resellers and businesses that want a branded phone app.
- Linux servers: RHEL, Ubuntu and Debian builds, performance tuning, troubleshooting, Tier-3 support.
- Networking: Cisco and MikroTik routing and switching, VLANs, site-to-site VPN, firewalls, NAT, DNS, QoS.
- Cloud and virtualisation: AWS, OpenStack private cloud, oVirt/RHEV, Virtuozzo hyper-converged infrastructure, large VM and container migrations.
- Kubernetes, Docker, Helm, CI/CD pipelines and Ansible automation.
- Storage, databases and disaster recovery: GlusterFS, MySQL/MariaDB, MongoDB, Oracle, tested backups.
- Security: server and network hardening, security audits, incident response.
- Monitoring and IoT data: Grafana, InfluxDB, Nagios, CloudWatch, Node-RED, MQTT.
- Self-hosted mail (Mailcow with SPF/DKIM/DMARC) and business apps (n8n, GLPI).

## Packages

- Infrastructure audit (fixed price): servers, network, security and backup review with a written, prioritised report.
- VoIP / call-centre setup (fixed price): Asterisk, Kamailio or VICIdial with trunks, QoS, hardening and monitoring.
- White-label SIP phone app (fixed price per brand): your brand on Android, iOS and desktop, connected to your business PBX, published under your accounts.
- Platform build or migration (fixed price): cloud, Kubernetes or private cloud, CI/CD, runbook and handover.
- Monthly care (retainer): patching, backup tests, monitoring, priority support, monthly report.
- Emergency fix (fixed price per incident): server, network or PBX outages, dropped calls, one-way audio; root cause plus incident report.

## Selected results

- Raised system availability from 97.5% to 99.4% by removing single points of failure (~80 Linux/Unix systems).
- Cut maintenance downtime from 2 hours to 30 minutes on a high-capacity telco cloud phone platform.
- Tuned Linux systems for up to 30% better performance.
- Designed and built a 236 TB four-node GlusterFS cluster and an OpenStack private cloud for a university.
- Moved a smart-energy IoT monitoring platform onto Docker and Kubernetes.

## Experience

- Chief Technology Officer, AsteriskBD, Dhaka (2012–present)
- Head of Infrastructure, Hadron Solutions, Italy (2024–2026)
- Chief Information Officer, Zella Technologies, United States (2024)
- Technical Engineer, Cloud Deployment & Operations, Virtuozzo, Malaysia (2022–2024)
- Head of IT & Infrastructure Operations, Nautilus SIP, Singapore (2019–2022)
- Earlier: Medigap Life (US, VICIdial/Asterisk), Dhaka International University, Mesh Technologies, Volt9 Networks (US)

## Credentials

- MSc Cyber Security, De Montfort University, UK (2023)
- Red Hat Certified Engineer (RHCE), plus Red Hat specialist certifications in Security & Hardening, Virtualization and Gluster Storage
- AWS Certified Solutions Architect – Professional (earned 2021) and SysOps Administrator – Associate (earned 2020)
- Cisco Certified Specialist – Service Provider Core (earned 2020)
- Virtuozzo Certified Engineer

## Profiles

- Freelancer.com: https://www.freelancer.com/u/abusayed2004
- Upwork: https://www.upwork.com/freelancers/~01a5c1cd46ef39a2c4
- LinkedIn: https://www.linkedin.com/in/mohammadabu-syed-46438159

Languages: English, Bangla, Hindi.

## Client reviews (Freelancer.com: 4.9/5 from 104 reviews, clients in 28 countries, 12 repeat clients)

- "Mohammad made a dialplan integration for Asterisk for us to send data to a URL. The work was done excellently." (Client in Switzerland, 2024)
- "He completed the task ahead of schedule and was very honest about the time spent… helpful, knowledgeable, understanding and quick to respond." (Client in United Kingdom, Asterisk SIP trunk setup, 2024)
- "Great developer. I've received more than I asked. Highly recommended!" (Client in Lithuania, Asterisk PBX, 2025)
- "Highly responsive. Highly educated and very adaptive to every scenario… dependable and timely with their commitments." (Client in United States, Asterisk & VICIdial support, 2019)
- All reviews: https://www.freelancer.com/u/abusayed2004