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🎯 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.

$300K+ earned on Upwork · 74 completed · 100% JSS · Top Rated Plus · 6,300+ hrs I build Laravel + Vue SaaS platforms and ship AI voice/chat agents (Twilio + Deepgram + LLM) for teams that need working software, not prototypes. 12+ years, based in Vancouver. RECENT WORK ✅ JagCall — AI voice agent SaaS for small businesses. 24/7 inbound call handling (Twilio + Deepgram + Claude), calendar booking, CRM sync, sub-second latency. ✅ LinoChat — Multi-tenant AI customer support platform. LLM-backed agents with knowledge-base RAG, live handoff, and per-tenant billing. ✅ Multi-tenant SaaS platforms — Laravel/Vue with role-based portals, Stripe billing, REST APIs, and admin dashboards. ✅ Field service management SaaS — scheduling, dispatch, driver mobile app (React Native), and route optimization. ✅ Business automation — n8n/FastAPI pipelines, web scraping, and data normalization with Claude/GPT. ✅ Legacy rescue — inheriting broken or half-built codebases and shipping them to production without a rewrite. STACK Backend: Laravel · FastAPI · Python · PHP · Node.js Frontend: Vue 3 · React · Next.js · TypeScript · Tailwind Mobile: React Native · Expo AI: OpenAI · Anthropic Claude · Deepgram · LangChain · RAG Data: PostgreSQL · MySQL · Redis · Elasticsearch Infra: Hetzner · Cloudflare · Docker · nginx · PM2 · GitHub Actions Payments: Stripe · WooCommerce I also run a small development agency (ClickWebStudio Technologies), so I own infrastructure end to end — servers, deployment, monitoring, and maintenance included, not handed off. BEST FIT FOR • SaaS builds — greenfield or scaling • AI integrations (voice, chat, RAG, data pipelines) into existing apps • Complex Laravel work — multi-tenant, billing, custom admin • Rescue projects — codebases started by someone else that need shipping Send a message with what you're trying to build and I'll tell you honestly whether I'm the right person for it. — Alex

I build custom WooCommerce plugins for payments, pricing logic, and complex checkout flows. If your store needs functionality that existing plugins don't support — I design and implement it cleanly. What I've built: - Custom payment systems (Pay-in-3, Stripe subscriptions, commission engines) - Advanced WooCommerce logic (membership products, BOGO pricing, conditional checkout) - Backend systems (multisite sync, API integrations, database optimization) - Headless WordPress (REST, GraphQL, Next.js frontends) Recent results include performance improvements of up to 40%, complex checkout implementations, and large-scale system integrations. You should hire me if: - You need custom WooCommerce functionality beyond existing plugins - Your checkout, pricing, or payment logic is complex - Your store is slow or struggling with scale - You need to integrate WooCommerce with external systems ✓ Custom WooCommerce functionality (product types, pricing engines, checkout logic) ✓ Payment gateway development (Stripe, installments, webhooks) ✓ Performance optimization (database tuning, Redis caching, CDN) ✓ API development (REST endpoints, GraphQL, third-party integrations) I build maintainable backend systems. No page builders — just scalable code. WordPress coding standards, OOP PHP, modern development practices.