Hire the Best Vapi Developers

🛠️ Core Tech Stack & Enterprise Capabilities ⚙️ n8n (Advanced Workflow Infrastructure) Complex, high-performance automation backends. Because n8n supports self-hosting, it is my go-to choice for enterprise clients looking to bypass high monthly task fees, maintain strict data privacy, and handle advanced conditional logic. I specialize in building custom nodes, executing complex JavaScript/Python snippets within workflows, and deploying autonomous AI agents directly within the n8n ecosystem. 🤖 Lovable, Bolt.new & Base44 (Rapid App Prototyping & MVPs) For startups and fast-moving teams, I utilize Lovable, Bolt.new, and Base44 to rapidly scaffold, prototype, and deploy production-ready web applications. These next-generation, AI-assisted development tools allow me to spin up full-stack MVPs, handle database schema setups, and push functional application updates in a fraction of the time of traditional development. 🔮 Make Integromat (Visual Workflow Architecture) Multi-step visual automations using Make. I don’t just build basic "trigger-action"; I engineer enterprise-grade ecosystems featuring robust global error handling, data stores, router logic, and complex array manipulation. My Make blueprints are built with rate-limiting and webhook optimization in mind to ensure zero data loss. 🎬 HeyGen & Synthesia (AI Video Creation & Digital Twins + Custom Avatars) I handle end-to-end asset creation from custom script formatting and professional voice/tone mapping to template design and multi-scene pacing. I specialize in selecting the right AI spokesperson, setting up high-converting video layouts, and burning-in clean captions/subtitles. I guide executives and brand leaders through the technical process of capturing, rendering, and configuring their high-fidelity Digital Twins and custom voice clones. 📊 Airtable & Monday (Relational Databases & Work OS Architecture) Advanced database architecture, designing interactive Airtable Interfaces, and writing custom JavaScript scripts inside Airtable Automation blocks. Build and optimize enterprise-grade Monday CRM boards, custom dashboards, and cross-board automations. Setting up complex formulas and dependency tracking to mapping out advanced workflows for project management, CRM pipelines, and team operations. ⚡ Zapier (Rapid Business Integrations) I use Zapier to build clean, maintainable, and highly reliable automations across thousands of SaaS applications. Utilizing Webhooks by Zapier, Formatter steps, and custom Code blocks to minimize task consumption and maximize operational uptime for your daily business workflows. 🗣️ Vapi AI, Retell AI, ElevenLabs & Twilio (Conversational Voice AI) I architect ultra-low latency, human-like voice agents. By integrating Vapi AI and Retell AI with ElevenLabs for hyper-realistic speech synthesis and Twilio for programmable telecom infrastructure, I deploy voice bots that effortlessly understand context, handle interruptions, and log structured data directly back into your CRM. 🧠 LangChain & LangGraph (Multi-Agent Systems & State Machines) When standard prompt engineering isn't enough, I use LangChain and LangGraph to build advanced, context-aware AI applications. Cyclical, stateful multi-agent workflows - meaning the AI can loop back, self-correct errors, search internal knowledge bases (RAG), and execute complex reasoning paths before delivering an output. 🐍 Django & FastAPI (Robust Backend & Custom APIs) When no-code tools hit a wall, I write custom code. As a Django developer, I build secure, scalable backend architectures and web interfaces. Using FastAPI, I develop high-performance, asynchronous REST APIs that act as custom middleware seamlessly bridging the gap between your frontend applications, databases, and third-party AI models. Keywords: AI Automation Engineer, n8n Developer, n8n Specialist, Make Expert, Make Integromat, Airtable Consultant, Airtable Developer, Airtable Scripting, Zapier Expert, Zapier Automation, AI Workflow Automation, AI Agents Development, LangChain Developer, LangGraph, Multi-Agent Systems, Vapi AI, Retell AI, ElevenLabs, Conversational Voice AI, Voice Bot Developer, HeyGen, Synthesia, AI Video Automation, FastAPI Developer, Django Backend, No-Code Automation, Monday CRM, AI MVP Prototyping, Bolt.new, Lovable, RAG Pipeline Setup, Business Process Automation

Real Client Review - Dental Clinic Owner ⭐⭐⭐⭐⭐ "I could not have been more happy with the service I received from Aditya. I could not recommend him more highly." Results: No calls slip through anymore, 8 to 10 appointments recovered every month no more manually calling patients back, chasing no-shows, or answering the same booking questions on repeat. The front desk saves 15 hours every single week. That's the kind of work I do AI voice agents, workflow automation and appointment booking systems that run 24/7 without anyone managing them. Not concepts. Not prototypes. Systems that are live, running and saving real businesses real time right now. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ A little about me I'm Aditya. I find what's costing you time and automate it so you can focus on running your business and actually making money. I mainly work with service businesses - dental clinics, real estate agencies, home service companies and business owners who are drowning in manual work. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Here's what I've built 🦷 A dental clinic was losing appointments every week due to missed calls during and after office hours. Built an AI receptionist that books, reschedules and answers patient questions 24/7. No more missed calls. Saves around 15 hours per week and recovers 8 to 10 appointments the clinic was previously just losing. 🏠 A real estate agency needed to handle hundreds of daily calls across 5 departments without hiring more staff. Built a squad of 3 voice agents that transfer calls to the right department, gather information if no one picks up and handle out of hours calls too. 6,924 live calls handled in total, every one logged back to HubSpot automatically. Saves the company around 30 to 50 hours every week. 🔑 A locksmith company was losing jobs due to double bookings and slow dispatch. Automated their entire operation from handling inbound calls and lead qualification to offering the job to the nearest available locksmith. Saved them 10 plus hours a week and reduced dispatch errors significantly. 📧 A business owner was spending 3 to 4 hours every single day just dealing with emails and his calendar. Built a 3 part AI system that now manages his entire inbox and schedule automatically every morning. He hasn't manually sorted an email in weeks. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Tools I build with 🗣️ Voice agents (Vapi · Retell AI) - so your phone is answered 24/7 by an AI receptionist that sounds human, books appointments and never lets a call slip to voicemail again. ☎️ Calling (Twilio) - reliable phone infrastructure that connects your voice agent to any number, anywhere. 🛠️ Automation (n8n · Zapier · Makecom) - to connect all your tools so the manual copy-paste work between them just disappears and runs itself. 🤖 AI models (Claude · OpenAI) - the brain behind the system that understands context, scores leads, drafts replies and makes decisions automatically. 📊 CRM and data (HubSpot · Google Calendar · Google Sheets) - every call, lead and appointment logged automatically so nothing falls through the cracks. 🔌 Integrations (REST APIs · Webhooks) - to connect any platform, even ones that don't natively talk to each other. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Message me and tell me what's eating your time I'll tell you exactly which system would fix it and how long it would take to build. 💬

HIPAA-aware AI voice agents for healthcare — built on Synthflow, Retell AI and ElevenLabs. I turn missed calls into booked appointments with 24/7 reception, appointment booking and CRM automation that capture every inquiry and route it into your real systems. I specialize in production voice agents (Synthflow, Retell AI, Voiceflow, ElevenLabs) wired into your real systems — GoHighLevel, HubSpot, EHR / booking tools, Twilio telephony, plus AI chat & WhatsApp assistants (ManyChat, WATI) — with OpenAI / GPT-4o driving the conversation and n8n / Make orchestrating the workflow end to end. Healthcare is where I'm strongest. Recent work includes: Patient growth & booking across a 55-clinic chiropractic network (Australia) 24/7 AI shift-coordination for UK NHS healthcare staffing Bilingual (EN / ES) after-hours patient reception (Miami) Inbound AI receptionists for dental & medical clinics AI voice agent for medical consults (Synthflow + PracticeQ / EHR) I design with compliance in mind: HIPAA-aware architecture, PHI minimization, audit logging, and clear medical-escalation rules — the AI never diagnoses or gives medical advice; it routes to your staff. Beyond healthcare, I deliver the same voice + integration stack for clinics, agencies, startups, and appointment-driven service businesses. What I deliver: AI voice & chat agents: inbound / outbound calls (Twilio, VoIP), WhatsApp & web chat, FAQ, triage, appointment booking Lead qualification, enrichment & conversion bots Knowledge-base & RAG assistants (document / data retrieval, multi-agent) AI automation for business operations (n8n, Make, Zapier) + API / webhook integration CRM & calendar integration (GoHighLevel, HubSpot, Google Calendar) QA & testing for conversation flows and backend logic Backed by 8+ years in project management and backend development (JavaScript, Node.js, Express, serverless, Supabase), I own the full delivery cycle — architecture, conversation design, QA, deployment. Let's build a voice agent that fits your business. Message me to start)

40+ Hours Available Per Week Top Rated Plus full-time freelancer Manual QA with over 8+ years of experience in Software Quality Assurance, specializing in manual testing, functional and regression testing, cross-platform mobile and web application testing, API testing, workflow validation, and SaaS application QA. Extensive experience testing AI Voice & Chat Assistant platforms including Retell, Bland, Vapi, Wishpond AI, Senior Care AI, and more, along with marketplaces, booking systems, and enterprise applications. As a Top-Rated Plus freelancer on Upwork, I have delivered QA services to clients worldwide, backed by 250+ 5-star ratings ⭐, and tested 310+ mobile apps and 120+ web applications, collaborating with organizations like UNICEF and brands I test applications across all types of network conditions, including 3G, 4G, and 5G, as well as high-speed connections (1Gbps) and low-speed scenarios down to kilobits per second (kbps), ensuring optimal performance and usability under real-world conditions. Key Achievements: 🏆 Top Rated Plus freelancer with 8+ years of professional QA experience ⭐ 225+ 5-star reviews from satisfied clients 📌 300+ Upwork projects successfully completed 🤖 10+ AI Voice & Chat Assistant platforms tested (Retell, Bland, Vapi, Wishpond AI, Senior Care AI, etc.) 🚀 Tested and launched 70+ startup products successfully to the store ⏰ Worked over 27,500+ hours on Upwork. 📱 Android: Samsung Galaxy S24 Ultra, Samsung Galaxy S21 Plus, Poco X4, RealMe GT Master Edition, OnePlus 9, OnePlus 8T, Samsung A18 📱 iOS: iPhone 16 Pro Max, iPhone 14 Pro Max, iPhone 14 Plus,iPhone 15 Plus, iPhone 13 Pro Max, iPhone 11, iPhone XR 💻 Desktop: MacBook Air, HP Pavilion X360, RealMe Book, Lenovo ThinkPad, Samsung Galaxy Book 4 & 5 Manual QA Skills: • AI Model Performance Testing • AI Agent Functional & Usability Testing • Conversational AI & Chatbot Testing • Requirement Analysis • Test Case Design & Execution • Defect Reporting & Management • SEO Testing • Functional Testing • End-to-End Testing • Integration Testing • Exploratory Testing • PWA Testing (Progressive Web App Validation) • Reverse Testing – Test with Invalid/Unexpected inputs to ensure robust error handling & stability • Regression Testing • Cross-Browser Testing • Mobile App Testing (iOS & Android) • Usability Testing • UI/UX Testing • Payment Gateway Testing • System Testing & Acceptance Testing • API Testing (Postman, Swagger) • Performance Testing (Basic manual approach using tools) 🤖 AI Testing Expertise • AI Model Performance & Response Accuracy Validation • Conversational Flow, NLP Intent & Entity Testing • Voice Agent Quality Testing (ASR, TTS, Latency, Filler Word Detection) • Knowledge-Base and Prompt Flow QA • Context Retention & Session Continuity Testing • Multi-Agent Coordination and Voice Call Testing • Real-World AI App Testing (Retell, Bland, Vapi, ElevenLabs, Play.ht, Wishpond AI, Senior Care AI) Tools & Platforms: • Bug Tracking & Management: JIRA, Trello, Asana, Linear, ScribeHow • Collaboration & Reporting: Google Sheets, Notion, Slack • Testing Platforms: BrowserStack, physical devices • Performance & Analytics Tools: GTmetrix, SimilarWeb • Documentation: Test Plans, Test Cases, Checklists, FRS, User Manuals Domains Expertise: • eCommerce (Shopify, WooCommerce) • SaaS Applications • Healthcare • Mobile Applications • Insurance • Banking & Financial Services • Gaming • Point of Sale (POS) • ERP Systems • OpenAI Integration With a strong commitment to delivering error-free, high-performing software, I aim to exceed quality expectations and provide products that users love. I am available for flexible timings across any time zone and dedicated to helping you bring your software to the highest standards of performance and user satisfaction. Why Choose Me? ✔️ Proven expertise in Manual QA testing ✔️ Comprehensive experience across web and mobile platforms ✔️ Skilled in test documentation, ensuring a structured and repeatable testing process ✔️ Ability to identify critical defects and edge cases ✔️ Adaptable to both Agile and Waterfall methodologies ✔️ Flexible work hours to meet your project needs ✔️ Expert in crawling websites to ensure flawless functionality and SEO perfection -------------------------------------------------------------------------------------------------------- Related Keywords: Manual Testing, API Testing, Web Testing, Mobile App Testing, Regression Testing, Cross-Browser Testing, Test Case Design, Jira, UI/UX Testing, End-to-End Testing, Functional Testing, Bug Reports, Quality Assurance, iOS Testing, Android Testing, Test Plan, Usability Testing, User Testing, Software Testing, Manual QA, AI Testing, Chatbot Testing, Voice AI Testing, NLP Testing, Mobile App QA, Conversational AI, AI Model Evaluation, Reverse Testing, PWA Testing, Progressive Web App Validation, AI Apps Testing, Progressive Web Application, OpenAI, AI Apps, ChatGPT, Sora, Gemini, Generative AI, Chatbot

I build AI voice agents that answer calls, book appointments, and qualify leads, and RAG systems that turn large document libraries into instant, accurate answers. Expert-Vetted (top 1% on Upwork), Top Rated Plus, $300K+ earned across 250+ projects and 9,200+ hours. If you need an AI receptionist that handles inbound calls 24/7, an outbound voice agent for lead qualification and follow-ups, or an LLM assistant grounded in your own documents, this is the exact work I do every day. WHAT I BUILD AI Voice Agents (Vapi, Retell AI, Twilio, Deepgram, ElevenLabs) ➤ Inbound AI receptionists: call answering, FAQs, appointment booking, smart transfer to a human when needed ➤ Outbound agents: lead qualification, appointment reminders, follow-up calls ➤ Real-time call transcription, sentiment analysis, voicemail detection, and call summaries pushed to your CRM ➤ Telephony done right: SIP trunking, call routing, recording, and compliance-aware setups RAG and LLM Systems (AWS Bedrock, Claude, GPT, LangChain, pgvector) ➤ Retrieval augmented generation over large corpora: chunking, embeddings, vector search, reranking ➤ Document Q&A assistants and AI chatbots that cite sources instead of hallucinating ➤ Ingestion pipelines with OCR (Textract), queues (SQS), and cost monitoring Full-Stack Delivery Node.js, NestJS, FastAPI, Python, Next.js, React Native, PostgreSQL, MySQL, Redis, Docker, AWS (EC2, RDS, Bedrock, SQS). I ship the voice AI agent, the automation around it, and the product it lives in: dashboards, auth, billing, analytics. SELECTED WORK 🟢 SlayAI (legal AI platform): architected the RAG pipeline serving ~4,000 active users over a 300GB+ legal document corpus on AWS Bedrock, pgvector, SQS, and Textract. 97% answer accuracy in internal evals, with automated document ingestion and readiness checks. 🟢 HopDial (VoIP + AI calling platform): built live-call AI transcription and sentiment analysis on Twilio infrastructure with Deepgram STT and ElevenLabs TTS. 🟢 WhoseNo (my own product): high-traffic phone intelligence platform with 5.79M+ records, MySQL and Redis at scale behind Cloudflare, plus a companion Android app. WHY CLIENTS KEEP ME 96% Job Success across 178 reviews. Most of my work turns long-term: clients bring me in for one agent, and I end up owning their AI roadmap. I communicate daily, demo early, and never disappear. HOW TO START Send an invite or book a consultation. Tell me your call volume or document volume and the outcome you want. I'll come back with an architecture, timeline, and fixed scope.

🚀 Ready to stop losing leads and start scaling with automation? I help service-based businesses and online stores streamline their operations, boost conversions, and eliminate repetitive tasks—using tools like GoHighLevel, Vapi.ai, Shopify, and Make.com. Whether you're a real estate team, digital agency, or eCom brand, I build AI voice bots + CRM workflows that respond instantly, book calls, and close more leads—without extra staff. 💼 What I Can Help With: ✅ Voice Bot & AI Call Setup (Vapi + Twilio) → Inbound/outbound calling, voicemail drops, real-time CRM updates. ✅ CRM Automation (GoHighLevel + Make.com) → Smart triggers, lead follow-up flows, automated pipelines. ✅ Shopify + GHL Integration → Auto-tag new customers, email flows, upsell automations. ✅ Backend & API Integrations → Custom workflows using Make.com, n8n, Zapier, Dockerized APIs. ✅ Ongoing Optimization + Tech Support → Monitor, scale, and improve automations based on real-time performance. ⚙️ Tech Stack: GoHighLevel, Vapi.ai, Shopify, Make.com, n8n, Twilio, AWS, REST APIs, Git, Docker, PHP, React, Node.js 💡 Why Work With Me? 🧠 13+ years of experience in automation, web development, and backend systems ✅ Make.com Certified, AWS Certified, JavaScript Certified (Mozilla) 💬 Trusted by clients across Canada, the US, and UK for high-performance automations 📊 Proven results: saved 30+ hours/week for past clients using AI & CRM workflows 📩 Let’s connect if you want to streamline your business, close leads faster, and free up time for growth. I’ll happily record a free audit video showing exactly how we can improve your systems.