--- title: "Misal Azeem (@misalazeem) | Hashnode" description: "Misal Azeem (@misalazeem) writes on Hashnode. Read their latest articles and follow their work." url: "https://hashnode.com/@misalazeem" --- @misalazeem # Misal Azeem @misalazeem · Joined December 2025 ### [Mastering Production Integration Patterns: What I Learned with Twilio & Vapi](https://callstacktech.hashnode.dev/mastering-production-integration-patterns-what-i-learned-with-twilio-vapi?utm_source=hashnode&utm_medium=feed) Mastering Production Integration Patterns: What I Learned with Twilio & Vapi TL;DR Most Twilio-Vapi integrations fail because teams treat them as separate systems instead of coordinated pipelines. You'll hit race conditions (simultaneous call state u... 13 min read · [callstacktech.hashnode.dev](https://callstacktech.hashnode.dev/mastering-production-integration-patterns-what-i-learned-with-twilio-vapi?utm_source=hashnode&utm_medium=feed) [May 10](https://hashnode.com/posts/mastering-production-integration-patterns-what-i-learned-with-twilio-vapi/6a00c4b42996b9fd15c6af46) ### [How to Integrate Voice AI with Twilio for Customer Support: A Developer's Journey](https://callstacktech.hashnode.dev/how-to-integrate-voice-ai-with-twilio-for-customer-support-a-developers-journey?utm_source=hashnode&utm_medium=feed) How to Integrate Voice AI with Twilio for Customer Support: A Developer's Journey TL;DR Most Twilio voice integrations fail when AI responses lag behind caller input—creating awkward silence or overlapping speech. This guide builds a real-time AI voi... 14 min read · [callstacktech.hashnode.dev](https://callstacktech.hashnode.dev/how-to-integrate-voice-ai-with-twilio-for-customer-support-a-developers-journey?utm_source=hashnode&utm_medium=feed) [May 8](https://hashnode.com/posts/how-to-integrate-voice-ai-with-twilio-for-customer-support-a-developers-journey/69fe2197f75a65e744381bc5) ### [How to Integrate Voice AI with Twilio for Seamless Communication: A Developer's Journey](https://callstacktech.hashnode.dev/how-to-integrate-voice-ai-with-twilio-for-seamless-communication-a-developers-journey?utm_source=hashnode&utm_medium=feed) How to Integrate Voice AI with Twilio for Seamless Communication: A Developer's Journey TL;DR Most Twilio voice integrations fail when AI responses lag behind call state changes. Here's what breaks: mismatched webhook timing, buffer overruns on barge... 14 min read · [callstacktech.hashnode.dev](https://callstacktech.hashnode.dev/how-to-integrate-voice-ai-with-twilio-for-seamless-communication-a-developers-journey?utm_source=hashnode&utm_medium=feed) [Apr 26](https://hashnode.com/posts/how-to-integrate-voice-ai-with-twilio-for-seamless-communication-a-developers-journey/69ed9558886a081aca245c30) ### [How to Handle 429 Rate Limits on Retell /v1/call for High-Volume Sales Dialers](https://callstacktech.hashnode.dev/how-to-handle-429-rate-limits-on-retell-v1call-for-high-volume-sales-dialers?utm_source=hashnode&utm_medium=feed) How to Handle 429 Rate Limits on Retell /v1/call for High-Volume Sales Dialers TL;DR Most high-volume sales dialers hit 429 throttling within hours of launch. Retell enforces strict concurrency limits—exceed them and your entire queue stalls. This gu... 14 min read · [callstacktech.hashnode.dev](https://callstacktech.hashnode.dev/how-to-handle-429-rate-limits-on-retell-v1call-for-high-volume-sales-dialers?utm_source=hashnode&utm_medium=feed) [Apr 18](https://hashnode.com/posts/how-to-handle-429-rate-limits-on-retell-v1call-for-high-volume-sales-dialers/69e3079379f2e7136cdce679) ### [How to Integrate Voice AI with Twilio: My Experience with Voice APIs](https://callstacktech.hashnode.dev/how-to-integrate-voice-ai-with-twilio-my-experience-with-voice-apis?utm_source=hashnode&utm_medium=feed) How to Integrate Voice AI with Twilio: My Experience with Voice APIs TL;DR Most voice AI integrations fail when real-time transcription lags or barge-in interrupts cause audio overlap. This guide shows how to wire Twilio Media Streams to VAPI's WebSo... 15 min read · [callstacktech.hashnode.dev](https://callstacktech.hashnode.dev/how-to-integrate-voice-ai-with-twilio-my-experience-with-voice-apis?utm_source=hashnode&utm_medium=feed) [Apr 14](https://hashnode.com/posts/how-to-integrate-voice-ai-with-twilio-my-experience-with-voice-apis/69ddc285b4234651eeb70017)