Free SWITCH Developer ( Lua)

Job Title: FreeSWITCH & Call Center Solution Developer (Lua)

Exp :2 to 5 years

Job Summary:

We are seeking a skilled FreeSWITCH Developer with hands-on experience in call center solution development and customization. The ideal candidate must be proficient in Lua scripting, have a solid understanding of VoIP protocols, and be capable of building scalable and high-performance voice applications and call flows. Familiarity with open-source telephony platforms and call center solutions like FusionPBX, VICIdial, or Asterisk is a strong plus.

Key Responsibilities:

· Design, develop, and customize FreeSWITCH-based voice and call center applications.

· Write and maintain Lua scripts for call routing, IVRs, conferencing, and voicemail.

· Implement and support complex call flows, voice menus, and call queuing systems.

· Integrate with external systems (e.g., CRMs, databases, billing systems) via REST APIs, WebSockets, or sockets.

· Optimize system performance, troubleshoot VoIP issues (SIP/RTP), and provide Tier 2/3 technical support.

· Configure and manage FreeSWITCH modules, dial plans, and profiles.

· Customize existing open-source platforms like FusionPBX or build from scratch if needed.

· Work closely with DevOps and QA to deploy and test solutions.

· Prepare technical documentation and user manuals.

Required Skills & Qualifications:

· 2–5 years of hands-on development experience with FreeSWITCH.

· Strong proficiency in Lua scripting for telephony use cases.

· Good understanding of SIP, RTP, WebRTC, and other VoIP standards.

· Experience customizing or extending call center platforms (FusionPBX, VICIdial, etc.).

· Familiarity with Linux administration (Debian/Ubuntu preferred).

· Hands-on experience with REST APIs, MySQL/PostgreSQL, and JSON/XML.

· Ability to debug call flows using SIP traces, logs, and sngrep/wireshark.

· Experience with scripting languages like Bash or Python is a plus.

Preferred Qualifications:

· Experience in multi-tenant or high-availability VoIP architecture.

· Familiarity with WebRTC and browser-based calling features.

· Experience with containerization (Docker), CI/CD pipelines, and Git.

· Prior involvement in building custom call center dashboards or real-time monitoring tools.

Soft Skills:

· Strong problem-solving and debugging skills.

· Ability to work independently and within a team.

· Excellent communication and documentation skills.

· Comfortable working in Agile/Scrum environments.

Job Type: Full-time

Pay: ₹16,945.36 - ₹61,433.68 per month

Benefits:

• Food provided
• Paid sick time

Schedule:

• Monday to Friday