FreeSWITCH & FusionPBX Engineer

Posted on August 8, 2025

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Job Description

  • *Job Title: FreeSWITCH & FusionPBX Engineer (3�5 Years Experience)*
  • *Location: Remote*
  • *Experience Level: Mid-Level (3�5 years)*
  • *Shift : IST*
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  • Job Summary:
  • We are seeking a skilled and motivated VoIP Engineer with 3�5 years of hands-on experience in managing and configuring FreeSWITCH with FusionPBX. The ideal candidate will be responsible for the deployment, maintenance, troubleshooting, and optimization of VoIP solutions, ensuring high availability and performance across a scalable telephony infrastructure.
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  • Key Responsibilities:
  • Configure, maintain, and optimize FreeSWITCH and FusionPBX environments.
  • Design and implement VoIP routing, dial plans, call queues, IVRs, and related call-handling logic.
  • Monitor system performance and proactively address potential issues.
  • Integrate VoIP systems with external databases, CRMs, and APIs.
  • Troubleshoot SIP-related issues using tools such as sngrep, tcpdump, and Wireshark.
  • Ensure security best practices are followed, including firewall configuration, TLS, and fail2ban.
  • Perform regular system updates, patches, and backups.
  • Collaborate with cross-functional teams including developers, network engineers, and support staff.
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  • Required Qualifications:
  • 3�5 years of professional experience working with FreeSWITCH and FusionPBX.
  • Strong knowledge of SIP, RTP, and VoIP protocols.
  • Proficient with Linux system administration (Debian/Ubuntu preferred).
  • Experience in custom dial plan development and Lua scripting.
  • Familiarity with MySQL/PostgreSQL databases.
  • Solid understanding of networking fundamentals (IP, NAT, DNS, etc.).
  • Experience in monitoring and logging tools (e.g., Grafana, Prometheus, syslog, etc.).
  • Strong troubleshooting skills and attention to detail.
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  • Preferred Skills (Nice to Have):
  • Experience with other open-source PBX systems like Asterisk or Kamailio.
  • Knowledge of WebRTC and VoIP security best practices.
  • Familiarity with cloud infrastructure (AWS, DigitalOcean, etc.).
  • Basic knowledge of APIs (REST, JSON, XML).
  • VoIP QoS tuning and traffic analysis experience.
  • ________________________________________

Required Skills

* 3�5 years of professional experience working with freeswitch and fusionpbx. * strong knowledge of sip rtp and voip protocols. * proficient with linux system administration (debian/ubuntu preferred). * experience in custom dial plan development and lua scripting. * familiarity with mysql/postgresql databases. * solid understanding of networking fundamentals (ip nat dns etc.). * experience in monitoring and logging tools (e.g. grafana prometheus syslog etc.). * strong troubleshooting skills and attention to detail