Hire the Best Twilio API Developers
in the United States

Clients rate our Twilio API developers
Rating is 4.8 out of 5.
4.8/5
Based on 148 client reviews
Brent R.

Alameda, California

$99/hr
4.5
83 jobs

Expert Twilio & AI Conversational Solutions Developer | Top 1% Expert-Vetted Talent AI Communication Solutions Architect specializing in Twilio integrations and conversational AI tools that transform customer interactions. As an Expert-Vetted Talent (top 1% on Upwork), I help businesses implement intelligent communication systems that deliver measurable results. I combine deep technical expertise with strategic consulting to create solutions that solve real business problems. My Expertise: Twilio Development & Integration Specialist - Full-stack Twilio platform development with 7+ years of experience - Custom SMS, voice, and messaging workflows that scale with your business - Integration of Twilio services with existing business systems and CRMs AI Conversational Tool Development - Custom chatbots, SMS bots, and voice assistants powered by ChatGPT and other LLMs - Multi-channel AI solutions (phone, SMS, WhatsApp, Facebook Messenger, live chat) - Intelligent IVR systems that improve customer experience and operational efficiency Strategic Communication Consultant - Process analysis to identify automation opportunities - ROI-focused solutions that deliver measurable business impact - Clear roadmaps for implementing AI communication strategies Results I've Delivered: - Developed a custom missed call Slack app that reduced agent response time from 30+ minutes to under 3 minutes, improving customer satisfaction and sales conversion - Created custom screen pop tools for Five9 that decreased call handling time by 6 seconds per call and reduced agent training by 4 hours per client - Built React components and plugins for custom call-center dashboards that streamlined agent workflows - Implemented multi-channel messaging flows with AI integration that provide 24/7 customer support Technology Stack: Twilio, ChatGPT (OpenAI API), Claude API, Ruby, JavaScript, React, Node.js, Bootstrap, WhatsApp Business API, Facebook Messenger API, Slack API, Airtable API, Monday.com API, Pipedrive API, Make.com API, Zapier API, Hubspot API, and more. I bring both technical expertise and business acumen to every project. Whether you need implementation support or strategic consulting on your communication systems, I'm here to help you leverage AI and cloud communication platforms to achieve your business goals. Let's discuss how we can transform your customer interactions.

  • Twilio API
  • Twilio
  • JavaScript
  • API Integration
  • React
  • IVR Software
  • Chat & Messaging Software
  • Chatbot
  • Product Strategy
  • Product Launch
  • Product Management
  • Product Roadmap
  • ChatGPT
  • Azure OpenAI Service
  • OpenAI Codex
Ahsan H.

Sacramento, California

$40/hr
5.0
2 jobs

✨ Senior API Integration & AI Automation Specialist | LLM & OpenAI Expert ✨ Core Expertise: API Integrations • AI Agents • LLM Applications • OpenAI API • Payment Gateways • ERP Systems • Chatbots • Microservices • Marketing Tools • Healthcare Systems • Financial Platforms • Middleware • CRM • Social Media APIs • Databases • E-commerce • Workflow Automation • HubSpot • Salesforce • QuickBooks API • NetSuite Integration • Odoo ERP Development • Zoho Books API I help businesses connect platforms, automate workflows, and build scalable AI-powered systems using APIs, LLMs, and modern backend technologies. My expertise includes API integrations, AI agents, OpenAI-powered applications, payment gateway systems, CRM/ERP synchronization, workflow automation, and custom middleware development. I focus on building reliable integrations that improve operational efficiency, reduce manual work, and scale smoothly with business growth. Core Expertise: ✔ API Integrations ✔ AI Agents & LLM Applications ✔ OpenAI API & Automation ✔ Payment Gateway Integrations ✔ QuickBooks & Xero Integrations ✔ CRM & ERP Systems ✔ Twilio, WhatsApp & Messaging APIs ✔ Webhooks & Microservices ✔ Healthcare & Financial Systems ✔ E-commerce Integrations ✔ Custom Backend Development Tech Stack: Node.js • NestJS • Python • FastAPI • Express.js • PostgreSQL • MongoDB • Redis • REST APIs • GraphQL • Docker • AWS • Firebase I’ve worked on integrations involving payment platforms, accounting systems, AI chatbots, communication APIs, SaaS products, and enterprise workflow automation systems. Why clients work with me: ✅ Clean and scalable architecture ✅ Fast communication and reliable delivery ✅ Business-focused solutions ✅ Long-term maintainable systems ✅ Strong debugging and problem-solving skills If you need an experienced developer to build secure integrations or AI-powered automation systems, feel free to invite me to your project or schedule a quick chat. Full Stack Developer | MERN Stack Developer | Base44 Developer| React.js Developer | Next.js Developer | Node.js Developer | JavaScript Developer | Web Application Development | Custom Web Applications | SaaS Development | MVP Development | Startup Developer | Scalable Web Applications | Backend Developer | Frontend Developer | API Integration | REST API Development | GraphQL API | API Developer | Third-Party Integrations | Payment Gateway Integration | Stripe | PayPal | CRM Integration | HubSpot | Zoho| Salesforce | Dashboard Development | Admin Panel Development | Automation Developer | Workflow Automation | Zapier | Make | Integromat | n8n | Database Design | MongoDB | PostgreSQL | MySQL | Firebase | Supabase | Redis | Real-Time Applications | Web Performance Optimization | Responsive Web Design | Tailwind CSS | Modern UI/UX | Cloud Deployment | AWS | Vercel | Docker | CI/CD Pipelines | GitHub Actions | Serverless Architecture | Microservices Architecture | Secure Authentication | JWT | OAuth) | Role-Based Access Control | RBAC | SaaS Platforms | Marketplace Development | Booking Systems | ERP Systems | CRM Systems | Scalable Backend Systems | Twilio API | WhatsApp API | SMS API | Messaging API | VOIP Systems | Cloud Telephony | Call Automation | Auto Dialer Systems | IVR Systems | Call Routing | WebRTC | SIP Integration | Call Recording & Analytics | CRM Calling Integration | QuickBooks Online Integration | QBO Automation | Accounting Workflow Automation | Financial Data Sync | Invoicing & Payments Sync | Expense & Transaction Automation | Bookkeeping Integrations | POS to QuickBooks Sync | Payroll & Reporting Automation | NetSuite Integration | Odoo ERP Development | Zoho Books API Integration | ERP & Accounting Software Integrations

  • Twilio
  • Web Development
  • React
  • Django
  • PHP
  • Vue.js
  • Node.js
  • NestJS
  • Xero
  • Shopify
  • QuickBooks Online
  • Supabase
  • n8n
  • Data Visualization
  • Python
  • Automation
  • SMS Gateway
  • Shipping & Order Fulfillment Software
  • OpenAI API
  • Payment Gateway Integration
David I.

York, Pennsylvania

$7/hr
5.0
1 jobs

Every business I've worked with that was losing leads had the same problem—not a marketing problem or a sales problem, but a response problem. Calls were going unanswered. Leads were waiting hours for follow-up. Appointments were slipping through the cracks because nobody responded fast enough. That's where AI changes everything. I am an AI Receptionist Developer, AI Voice Agent Developer, and Voice AI Automation Expert specializing in Retell AI, Vapi AI, Twilio, GoHighLevel, n8n, Make, OpenAI, and ElevenLabs. I build production-ready AI Receptionists, AI Voice Agents, AI Phone Agents, AI Calling Agents, Voicebots, and Conversational AI Systems that answer calls 24/7, qualify leads, schedule appointments, transfer calls, update CRMs, and automate follow-ups without human intervention. I build intelligent AI Receptionists that sound natural, understand customer intent, answer FAQs, qualify prospects, collect customer information, route calls, book appointments directly into your calendar, and trigger automated SMS, email, and CRM workflows the moment a conversation ends. I have deployed AI Receptionists for healthcare clinics, dental practices, real estate investors, home service businesses, law firms, SaaS companies, and sales teams handling real customer conversations every day. I've also built outbound AI calling systems that revive cold leads, automate appointment reminders, conduct customer follow-ups, and generate new opportunities around the clock. WHAT I BUILD AI Receptionists & Voice AI Systems • AI Receptionists • AI Voice Agents • AI Phone Agents • AI Calling Agents • Conversational AI • AI Customer Support • AI Virtual Receptionists • AI Call Center Automation • Voicebots • Inbound AI Calling • Outbound AI Calling • AI Appointment Booking • AI Lead Qualification • AI Call Routing • AI Customer Service Automation • AI Phone Support • Missed Call Automation • AI Call Answering Systems Voice AI Platforms • Retell AI • Vapi AI • Twilio Voice • Twilio Studio • TwiML • OpenAI GPT 4o • ElevenLabs • LiveKit CRM & Business Automation I build complete automation systems using GoHighLevel, n8n, Make, HubSpot, Salesforce, Zoho CRM, Google Calendar, APIs, and Webhooks, allowing every call to automatically update your CRM, trigger follow-up campaigns, assign tasks, send SMS, schedule appointments, and notify your team instantly. INDUSTRIES I SERVE Healthcare • Medical Clinics • Dental Clinics • Real Estate • Home Services • HVAC • Roofing • Plumbing • Law Firms • Insurance • Mortgage • Automotive • SaaS • Agencies • Coaches • E-commerce • Local Businesses • Customer Support Teams • Sales Teams WHY CLIENTS WORK WITH ME I don't build demo bots. Every AI Receptionist and AI Voice Agent I deliver is designed for real business operations, tested against real customer conversations, edge cases, and production environments before deployment. From conversation design and prompt engineering to Voice AI optimization, CRM automation, appointment scheduling, call routing, lead qualification, and post-call workflows, I build complete systems that help businesses respond faster, book more appointments, reduce missed opportunities, and scale customer communication automatically. If you're looking for an AI Receptionist Developer, AI Voice Agent Expert, Voice AI Developer, Retell AI Specialist, Vapi AI Developer, Twilio Expert, AI Phone Agent Developer, Conversational AI Engineer, AI Calling Agent, Virtual Receptionist Developer, GoHighLevel Automation Expert, or Call Center Automation Specialist, I can build a production-ready solution tailored to your business. Send me a message with: • Your industry • How your calls are currently handled • Your CRM or software stack • What you'd like to automate I'll recommend the best AI Receptionist, Voice AI, or automation system for your business and build a solution that delivers measurable results. AI Receptionist, AI Voice Agent, AI Voice Agent Developer, AI Receptionist Developer, AI Phone Agent, AI Calling Agent, Voice AI, Conversational AI, AI Call Center, Virtual Receptionist, AI Virtual Receptionist, AI Customer Support, AI Customer Service, AI Phone System, AI Call Answering, AI Answering Service, AI Assistant, AI Voice Assistant, AI Automation, Business Automation, Workflow Automation, Voicebot, AI Bot, Phone Automation, Call Automation, Call Routing, Call Forwarding, Smart IVR, AI IVR, Intelligent IVR, Voice Automation, AI Calling, Inbound Calling, Outbound Calling, Cold Calling Automation, Lead Qualification, AI Lead Qualification, Lead Capture, Lead Generation, Lead Nurturing, Appointment Booking, Appointment Scheduling, Calendar Automation, CRM Automation, Sales Automation, Customer Support Automation, Follow-up Automation, Missed Call Text Back, SMS Automation, Email Automation, Pipeline Automation, Marketing Automation, GoHighLevel, GHL, GoHighLevel Automation, GoHighLevel CRM, Retell AI, Vapi, Vapi AI, Twilio, Twilio Voice, Twilio Studio, OpenAI, GP

  • Twilio
  • AI Chatbot
  • AI Agent Development
  • Artificial Intelligence
  • Machine Learning
  • Automation
  • Chatbot
  • LLM Prompt
  • LLM Prompt Engineering
  • API Integration
  • OpenAI API
  • OpenAI Inc.
  • n8n
  • Make.com
  • JSON
  • Node.js
  • AI App Development
Paul M.

Cupertino, California

$75/hr
4.7
490 jobs

Software developer with 20+ years experience. Many of these years in large telecommunication companies. Developed and project managed complex products. I am focused in a few areas. This focus and experience enables quicker turnaround for you. Expert in Twilio. Tier 1 partner of Twilio and recognized by Twilio itself. Expert in complex asterisk PBX setup for multi-extensions, multi-trunks, queues, hunt group, IVR. Complex IVRs, customizations and scripts for asterisk. Large PBX setup using Kamailio as proxy. Expert in developing large distributed systems using Amazon AWS. Expert in Roku. Developed several popular Roku Channels including that of Fortune 100 companies (Details provided on request)

  • Twilio API
  • Twilio
  • PHP
  • Nexmo
  • Asterisk
  • Amazon Web Services
  • FreePBX
  • Plivo
  • Apple TV Application
  • Roku Development
  • Stripe
  • Zoho CRM
Ken S.

O Fallon, Missouri

$50/hr
4.9
51 jobs

Experienced and versatile database and web developer. Wordpress, Paid Memberships Pro, plugins, C# .Net, AWS (EC2, Route53, Lambda, API Gateway), Node.js, jQuery, HTML, CSS, Databases REST API, Twilio SMS and Sendgrid.

  • Twilio
  • Node.js
  • jQuery
  • WordPress
  • .NET Framework
  • SQL
  • PHP
  • ASP.NET
  • ExpressJS
  • HTML
  • AWS Lambda
  • Scripting
  • SQL Programming
  • SendGrid
Sohail M.

Lake Forest, California

$30/hr
5.0
9 jobs

Chatbot developer and AI voice agent specialist. I build production-grade chatbots, voice agents, AI automation, and LLM integrations using Python and FastAPI. Systems built for production, handling real users, real workloads, and delivered with complete documentation and handover. 🏆 TRUST SIGNALS ⭐ 5-star average across completed client projects 🎯 Every project endorsed by the client 💻 Production AI, voice, and backend systems delivered across multiple industries 📈 PROJECTS I HAVE DELIVERED ✅ AI phone agent using Twilio and OpenAI Realtime API, 35% reduction in call handling time, 18% improvement in customer satisfaction ✅ Multi-agent sales system using LangGraph and CrewAI, 60% improvement in outreach efficiency ✅ AI voice calling and sales automation platform with LLM-powered agents and multi-tenant architecture ✅ AI customer support and lead generation platform with RAG, vector search, and semantic retrieval ✅ AI fraud prevention platform with real-time risk analysis and up to 98% chargeback reduction 🛠️ WHAT I BUILD WITH GPT-4, Claude, OpenAI, LangChain, LangGraph, CrewAI, RAG pipelines, Pinecone, ChromaDB, Vector Search, Vapi, Retell AI, Twilio, OpenAI Realtime API, ElevenLabs, n8n, Python, FastAPI, REST APIs, WebSockets, MCP, A2A, Redis, MongoDB, PostgreSQL. 🧠 HOW I WORK ✔️ Scoped before development, built for production, not demo environments ✔️ Tested against real edge cases, not scripted happy paths ✔️ Clean architecture, scalable code, complete documentation, and handover ✔️ Fast communication throughout, you always know where things stand 📩 BUILD WITH ME Need an AI chatbot, voice agent, RAG system, AI automation, or LLM integration? Tell me what you're building, what it needs to connect to, and the outcome you want. I'll recommend the right technical approach and help you build a production-ready solution.

  • Twilio API
  • Chatbot Development
  • AI Chatbot
  • Conversational AI
  • AI Agent Development
  • Retrieval Augmented Generation
  • Large Language Model
  • Vector Database
  • Automatic Speech Recognition
  • Natural Language Processing
  • LangChain
  • ElevenLabs
  • n8n
  • Python
  • Next.js
  • FastAPI
  • AI App Development
  • MongoDB
  • PostgreSQL

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