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Experienced FE and BE developer specialized in development of websites and applications for various small and medium sized business across North America and Europe. Primary specialization in FE development include VueJS, EmberJS, ReactJS, React Native, and pure Javascript; BE development specialization include Object-oriented PHP, NodeJS, MySQL and MongoDB. Experienced in development of custom made systems as well as open-source platforms/frameworks such as Wordpress, SilverStripe, Laravel.

Medical image processing applications developer. Experienced in AI for medical image processing using PyTorch and other traditional machine learning approaches. Experienced in the use of 3DSlicer.

🎯 Need an expert who can build or optimize your system right, the first time? I’m Mamta Bajaj, a Top Rated Plus developer with $100K+ earned and a 100% Job Success Rate. I specialize in building secure SaaS applications, complex financial architectures, and production-ready AI/LLM application layers without endless revisions or vague timelines. Instead of just writing code, I architect scalable solutions, design secure database schemas, and comfortably step into existing codebases to fix broken payment loops or embed modern AI features. 🤖 AI Applications & LLM Integrations • Agentic Workflows: Designing autonomous backend agents using custom Node.js, Laravel, or Python scripts to automate complex multi-step business logic. • LLM API Integrations: Connecting OpenAI (ChatGPT), Anthropic, and open-source models into consumer web apps for text processing, semantic search, and data extraction. • Data & PDF Analysis: Building secure, Zero-PII browser extensions and backend parsing systems for intelligent document metadata analysis. 💳 Payment & Financial Tech Expertise (Stripe Specialist) • Stripe Connect: Multi-tenant setups, marketplace routing, and split-payment flows. • Stripe Billing: Advanced subscription lifecycles, metered billing, and webhook synchronization. • Cross-Platform: Syncing web checkouts side-by-side with mobile In-App Purchases (Apple/Google). 💻 Core Technical Stack • Backend & API: Laravel (PHP), Node.js, RESTful API architecture, and Supabase. • Database: High-performance MySQL/PostgreSQL schema design, query optimization, and migrations. • Frontend & Automation: React, Angular, Vue.js, n8n, Zapier, and Twilio API integrations. 🚀 Where I Add Immediate Value • SaaS MVP Development: Building and launching clean, reliable products in 3–4 weeks. • Codebase Rescue & Polish: Onboarding fast to existing repos, fixing legacy payment bugs, or cleaning up messy database logic. 📍 Based in Barrie, Ontario (EST). Seamless communication and full timezone alignment with North American clients. Click "Invite to Job" on the right, and let’s get your project shipped cleanly and on schedule.

Hi! This is Marco Maigua with 9 years of experience in the Software Architect and development and I earned Masters degree in Computer Science at the University of Saskatchewan. I have launched successful products in web and mobile technologies, blockchain, Crypto, Cloud Computing while I engaged in various types of clients' projects from MVP to production. With the antifragile mindset, I have adopted and remained resilient, fostering a high-performance culture, blending technical and strategic expertise and applying best practices and optimization techniques. While working as a full-stack engineer, I put exceptional attention to detail into the projects and launched more than 10 MVPs, POCs into success, fixing the bugs thus ensured smooth production. I am ready to jump into your projects and discuss the details further!!

I’m a Senior Software Engineer and Team Lead with 6+ years of experience building scalable, cloud-based web, mobile, AI agents, and AI-powered applications. I specialize in Node.js, TypeScript, React/Next.js, React Native, and AWS architectures, with proven expertise in designing microservices, cloud solutions, and AI/LLM integrations. I help startups and enterprises accelerate product development, optimize cloud costs, and implement intelligent automation systems. My experience spans: • Full-stack web & mobile applications with modern frameworks • AI agents, workflows, LLM integrations, and vector-based search systems • Scalable microservices, APIs, and DevOps automation • Cloud architecture, migration, and performance optimization I deliver clean, maintainable code, take ownership of projects end-to-end, and ensure your software scales efficiently. Let’s build something impactful together.

I build production-grade AI voice agents, RAG pipelines, and LLM-powered SaaS platforms using Vapi, Retell AI, Twilio, Deepgram, and ElevenLabs. 12+ years as a full stack developer and founder of Tech Stone Global, serving clients across North America. Most AI developers can build a demo. I ship systems that survive real users, real call volume, real revenue, and strict SLA requirements. 🎙️ 𝐀𝐈 𝐕𝐨𝐢𝐜𝐞 𝐀𝐠𝐞𝐧𝐭𝐬 (𝐂𝐨𝐫𝐞 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐭𝐲) End-to-end AI voice agents and AI receptionists: inbound and outbound calling, appointment booking, lead qualification, real-time transcription, sentiment analysis, CRM integrations (GoHighLevel, HubSpot, custom), and human handoff flows. ✔ Vapi, Retell AI, Bland when you need fast platform-based deployment ✔ Custom Twilio + Deepgram + ElevenLabs pipelines when you need full control over latency, cost, and conversation logic ✔ OpenAI, Claude, and open-source LLMs for the conversational layer Recent work: HopDial, a VoIP platform with call transcription, AI sentiment analysis, and scalable AWS infrastructure, plus outbound AI calling systems and AI receptionists for SMBs and service businesses. 🚀 𝐑𝐀𝐆, 𝐋𝐋𝐌 & 𝐀𝐈 𝐒𝐚𝐚𝐒 I run my own production products, so I know what breaks at scale and what actually generates revenue: ✔ Legal AI platform: production RAG system (LangChain + vector search) serving ~4,000 active users ✔ ProNotepad: Next.js SaaS with AES-256 encryption, voice-to-text, and AI features. 1,000+ users on web and Android ✔ WhoseNo: reverse phone lookup platform with 2.68M+ phone records and steady daily traffic ✔ WhatsApp-first AI business automation platform, plus AI chatbots for web and WhatsApp Client work includes real estate transaction platforms (Next.js), pharmaceutical marketplaces (React Native + NestJS), and private dining and booking platforms. 🛠️ 𝐏𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧 𝐒𝐭𝐚𝐜𝐤 Voice AI: Vapi, Retell AI, Twilio, Deepgram, ElevenLabs AI / LLM: OpenAI, Claude, LangChain, RAG (Pinecone, Chroma) Frontend: Next.js, React, React Native, Tailwind Backend: Node.js, NestJS, FastAPI, Python Databases: PostgreSQL, MySQL, MongoDB, Prisma Infrastructure: AWS (EC2, Lambda, S3), Cloudflare, Docker Rapid MVPs: Bubble combined with custom APIs and AI agents when speed-to-market matters I only list what I've shipped in production, not tools I've experimented with. 🎯 𝐖𝐡𝐨 𝐈 𝐖𝐨𝐫𝐤 𝐁𝐞𝐬𝐭 𝐖𝐢𝐭𝐡 1. Founders building serious voice AI or AI SaaS products 2. SMBs and service businesses (clinics, real estate, agencies) that want AI calling agents to book appointments and convert leads 3. Funded startups scaling from prototype to production 4. Agencies needing a senior AI and architecture partner 5. Teams on Bubble that want real AI and backend systems behind their app 12+ years means I've already made the expensive mistakes, so you don't have to. You get clean architecture, honest timelines, and production-ready systems your next developer won't struggle to maintain. If you're building something serious with AI voice agents, RAG, LLM apps, or AI SaaS, send an invite and share your idea. I'll respond with a technical breakdown, not a generic pitch. Keywords: AI Voice Agent Developer, Voice AI, AI Receptionist, AI Agent Development, AI Automation, AI Chatbot, Vapi, Retell AI, Twilio, Deepgram, ElevenLabs, RAG, LLM, LangChain, Full Stack Developer, Next.js, Node.js, FastAPI, Appointment Booking, Lead Qualification