Senior FreeSWITCH Developer (Python / AI Integration)

Experience Required: 2+ Years (with advanced specialization)

About the Role

We are seeking an experienced Senior FreeSWITCH Developer with advanced expertise in ESL scripting, AI integration, Signalwire audio streaming, and network-level debugging. This role focuses on building sophisticated, cloud-native telecommunications solutions with AI capabilities. You will architect and implement complex real-time communication systems, integrate modern AI technologies, handle advanced network diagnostics, and containerize applications using Docker and Kubernetes.

Key Responsibilities

Develop and maintain advanced FreeSWITCH modules and applications using Python and ESL (Event Socket Layer) scripting

Design and implement AI-powered features integrated with FreeSWITCH (conversational IVR, voice recognition, sentiment analysis, speech-to-text processing)

Work with Signalwire Mod for advanced audio streaming, processing, and manipulation capabilities

Debug and troubleshoot network-level challenges including packet analysis, SIP flow debugging, and protocol-level issues

Containerize FreeSWITCH applications using Docker and orchestrate deployments with Kubernetes

Design and implement call control logic, IVR systems, and voice/video communication features with advanced routing

Integrate FreeSWITCH with third-party APIs, ML models, and external systems using Python

Optimize application performance, manage distributed systems, and ensure high availability in production

Write clean, maintainable, and well-documented code following microservices and DevOps best practices

Conduct network analysis and debugging using tools like tcpdump, Wireshark, and SIP protocol analyzers

Collaborate with team members on architecture design, code reviews, and continuous improvement

Required Qualifications

Minimum 2+ years of professional development experience with FreeSWITCH in production environments

Advanced expertise in ESL (Event Socket Layer) scripting and FreeSWITCH event handling





Proven experience integrating AI and machine learning models with FreeSWITCH (LLMs, voice AI, ASR, TTS)

Working experience with Signalwire Mod for audio streaming and advanced media processing

Demonstrated capability to debug and resolve network-level challenges (SIP protocol, RTP, media negotiation)

Strong proficiency in Python (3.x) with proven production experience

Hands-on experience with Docker containerization and Kubernetes orchestration

Deep understanding of VoIP concepts, SIP protocol, RTP, and telecommunications standards

Experience with FreeSWITCH APIs, modules, C modules, and extension development

Solid understanding of REST APIs, gRPC, and distributed system integration patterns

Experience with Linux/Unix environments and advanced command-line tools

Knowledge of databases (SQL and/or NoSQL) and caching solutions (Redis)

Strong problem-solving skills and ability to work independently on complex issues

Excellent communication and teamwork abilities

Technical Skills Required

FreeSWITCH (dialplan, modules, C modules, APIs, ESL scripting)

ESL (Event Socket Layer) scripting and event-driven programming

AI/ML integration (OpenAI, Anthropic, local LLMs, voice AI frameworks)

Signalwire Mod for audio streaming and media manipulation

Python 3.x and related frameworks (Flask, FastAPI, Django, Async frameworks)

Docker containerization and image management

Kubernetes orchestration, deployments, and cluster management

Network debugging tools (tcpdump, Wireshark, SIP analyzers)

VoIP and SIP protocol knowledge with hands-on debugging experience

RESTful API design and gRPC integration

Linux/Unix system administration and advanced troubleshooting





Git version control and CI/CD pipelines

Database design and SQL/NoSQL (PostgreSQL, MongoDB, etc.)

Preferred Qualifications

Experience with WebRTC and modern real-time communication protocols

Knowledge of Helm charts and advanced Kubernetes patterns

Experience with cloud platforms (AWS, GCP, Azure) and CDN integration

Experience with message queues (RabbitMQ, Kafka, Redis for pub/sub)

Familiarity with agile development methodologies and DevOps practices

Experience with monitoring and observability (Prometheus, Grafana, ELK stack)

Knowledge of security best practices (SSL/TLS, SRTP, authentication)

Contribution to FreeSWITCH or open-source telecommunications projects

Bachelor's degree in Computer Science or related field (or equivalent hands-on experience)

Work Environment

Remote-friendly or on-site position (as per company policy)

Collaborative team environment with experienced developers and DevOps engineers

Access to modern development tools, cloud infrastructure, and networking equipment

Opportunity for continuous learning in emerging VoIP and AI technologies

Compensation & Benefits

Market-competitive salary commensurate with experience and expertise

Comprehensive health insurance and retirement benefits

Professional development and certification training budget

Flexible work hours and remote work options

Performance-based bonuses and incentives

Conference and event attendance budget

How to Apply

Interested candidates should submit their resume, portfolio, GitHub profile (if available), and a cover letter detailing their specific experience with ESL scripting, AI integration, Signalwire Mod, network debugging, and containerization. Please include examples of complex FreeSWITCH projects, AI implementations, and any open-source contributions.

Equal Opportunity Employer: We are committed to creating an inclusive workplace and welcome applications from all qualified candidates regardless of race, gender, age, religion, identity, or experience.

📌 Senior FreeSWITCH Developer (Python / AI Integration) (India)
🏢 Leader IT
📍 India