Summary: Seeking a skilled Python backend developer to bridge core infrastructure with the application layer and manage real-time call flows for seamless communication. Highlights: 1. Develop and maintain business logic for real-time call flows 2. Implement and optimize high-performance HTTP and WebSocket APIs 3. Ensure ultra-low latency and high resilience in event delivery We are looking for a skilled **python backend developer** to join one of our clients. You're will be is responsible for developing and maintaining the business logic that controls real\-time call flows. **This role involves bridging the core infrastructure with the application layer**, managing webhooks, metrics, transfers, bridges, rate\-limiting, and blacklists to ensure a seamless communication experience. **Key Responsibilities*** **API Development:** Implement and optimize high\-performance HTTP and WebSocket APIs for real\-time communication. * **Call Control Logic:** Develop and manage sophisticated call handling features, including **TRANSFER**, **BRIDGE**, and automated routing. * **System Governance:** Design and maintain robust mechanisms for rate\-limiting, blacklisting, and performance tracking. * **Performance Optimization:** Ensure ultra\-low latency and high resilience in event delivery to maintain system stability. * **Integration:** Facilitate the communication between the core telephony engine and the end\-user application layer. **Requirements** **Requirements*** **Technical Expertise:** Proven experience with **Python** in high\-concurrency or real\-time environments; * **Telephony Knowledge:** Strong understanding of **FreeSWITCH** or similar call control APIs; * **Real\-time Protocols:** Deep familiarity with **WebSockets** and asynchronous event handling; * **Engineering Mindset:** A sharp focus on performance, system resilience, and long\-term stability; * **Problem Solving:** Ability to troubleshoot complex logic flows in live production environments. **Nice to Have*** Experience with VoIP protocols (SIP, RTP); * Knowledge of distributed systems and message brokers (e.g., Redis, RabbitMQ); * Experience working in agile, remote\-first teams; * Fluent Spanish; * Professional Working English Proficiency.