Full Stack Developer ·
AI-Native App Architect ·
Agentic RAG Engineer
15+ years crafting intelligent, scalable systems — from idea to production
I'm Kingshuk, a multi-disciplinary Full Stack Developer, AI-Native App Architect, and Agentic RAG Systems Engineer with over 15 years of experience crafting scalable, intelligent, and secure digital solutions.
I specialize in LLM orchestration, Generative AI, and Agentic RAG pipelines using LangChain and Ollama. My approach combines deep technical architecture with product-thinking — I build complete systems, not just features.
From startups needing rapid MVPs to enterprises requiring robust infrastructure — I deliver production-ready systems with AI as a first-class citizen, not an afterthought.
Privacy-first multi-modal LLM interfaces, agentic toolchains, Agentic RAG pipelines, document understanding, and grounded chatbots with memory & tools.
End-to-end web & mobile apps with robust APIs using FastAPI, Laravel, .NET, and Node.js. React, Vue, and Angular frontends.
AWS-based architectures, serverless & microservice deployments, background jobs, and cost-aware scalable infrastructure.
Web scraping with Scrapy, BeautifulSoup, CasperJS. Automated data pipelines, sales automation, pricing & renewal systems.
OAuth, token-based auth, REST APIs, microservices. Ethical hacking & penetration testing with Kali Linux and Nmap.
Structured bootcamps in C/C++, Java, Shell, and Data Structures. College-level mentoring with real-world projects.
Cross-platform apps using React Native and Ionic with Angular. Intuitive UI/UX, API integration, and deployment.
MySQL, MongoDB, DynamoDB, PostgreSQL, Oracle. Data modeling, optimization, and real-time analytics pipelines.
I design and build complete production systems, not just features — from idea to MVP to scalable product.
Domain expertise across industries:
End-to-end delivery across AI, SaaS, eLearning, ERP, mobile, and real-time apps.
Retrieves and summarises academic papers using Agentic RAG, with a React interface for querying and visualisation.
Generates SEO-optimised blog content using Agentic RAG with real-time data integration.
Personalised real estate SaaS using Agentic RAG with real-time market and preference data.
Agentic AI portal automating audits and generating regulatory compliance reports.
Real-time fraud detection API for financial systems with high throughput and low latency.
E-commerce chatbot using Agentic RAG to fetch context from product catalogs, history, and FAQs.
SaaS with end-to-end encryption, AI transcription, and RAG-based meeting summaries.
Real-time monitoring with ML anomaly detection and Agentic AI incident response workflows.
Video-based engagement platform for campaigns using Ant Media for real-time streaming.
React app with real-time COVID-19 data visualisation across countries, maps, and charts.
Airbnb-style booking platform with search, filters, and reservation management.
React Native app making statistical data easy to understand with sleek UI/UX.
Ionic + Angular app helping lawyers track case histories, schedules, and documents.
Ionic app locating nearby doctors with GPS integration and ratings.
Chapter-wise purchases, multi-video modules, interactive video eBook and subscription system.
culturena.in →PHP ERP organising hotel staff, project tracking, on-demand hiring, and scheduling.
Dynamic inventory management for Indian Rail railway components with real-time tracking.
POS software managing recipes, menus, orders, inventory, and revenue reporting.
Data verification software used by banking institutions for automated record validation.
Visually rich 3D landing page with animated tech stacks and projects via Three.js.
Dynamic JS platform with custom blog and search engine for the Indian LGBTQ community.
vartagensex.org →Language learning portal for Bengali with user-focused UI and interactive exercises.
Production-ready websites — actively running and publicly accessible.
NDA-Protected Work: Multiple live dashboards, admin panels, and AI systems are in production but cannot be shared publicly due to client confidentiality. Architectural walkthroughs available privately upon request.
Ready to collaborate on AI-driven, scalable solutions? Whether you need a full product from scratch, a complex AI pipeline, or a technical leader for your team — let's talk.