Arghyadeep Karmakar

Architected microservices-based fintech trading platform handling 50K+ concurrent users with React, Node.js, Python, and PostgreSQL, achieving 99.95% uptime. Optimized database queries and implemented Redis caching layer, reducing API response times by 40% and database load by 45.

Architected multi-tenant ATS platform from zero to production, covering sourcing, placement, communications, document generation/e-signing (DocuSeal), and CRM for candidates, clients, and prospects. Built an n8n-style visual automation engine with 30+ configurable triggers/actions and a white-label website builder, reducing tenant onboarding time by 70%. Developed an omnichannel communications hub integrating Twilio (voice, SMS, WhatsApp), Gmail, and Outlook with bidirectional calendar sync, processing 5K+ messages per week across tenants. Engineered AI-powered services including candidate-role matching, call/meeting transcription and analysis, CV parsing, and automated assessments, reducing recruiter screening time by 60%. Built a memory and matching service using Cohere embeddings and Turbopuffer vector DB to track user interactions and build intelligent candidate/client profiles with 85%+ match accuracy.

Led development of AI-powered enterprise content studio serving 65K+ MAU, architecting full-stack solution with Next.js, TypeScript, Python FastAPI, and multi-LLM orchestration. Engineered responsive React frontends, built scalable microservices platform, and implemented various CI/CD and monitoring tools.