Pranay Das
Kolkata, India
Pranay Das
Web Developer - AI Integration, RAG, Loop Engineer
Category : Web development
I am a Senior Full Stack Engineer with 7+ years of experience building production-grade web applications across enterprise, fintech, travel, and edtech domains. My core stack is Angular, React, Node.js, and TypeScript, with a strong focus on AI integration and LLM-powered product development.
Over the past year I have independently designed, built, and deployed four production systems — an AI portfolio assistant with real-time WebSocket streaming and a tool-gated RAG pipeline, a codebase knowledge graph VS Code extension exposed as an MCP server for AI coding agents, an AI-powered resume builder with payment processing and atomic transaction handling, and an automated claim tracker using local LLM inference. One of these projects received a public acknowledgment from a Google Developer Advocate.
On the enterprise side I have delivered complex frontend and full-stack systems for clients including Citi Bank, McGraw Hill, Mondee, and Old Mutual — handling framework migrations, performance optimization, state architecture, and secure access control across large-scale platforms.
I work with full ownership. I take a problem from architecture through deployment and I do not need hand-holding to get there. If you need someone who can think through a system, build it cleanly, and ship it reliably — I am available immediately.
Over the past year I have independently designed, built, and deployed four production systems — an AI portfolio assistant with real-time WebSocket streaming and a tool-gated RAG pipeline, a codebase knowledge graph VS Code extension exposed as an MCP server for AI coding agents, an AI-powered resume builder with payment processing and atomic transaction handling, and an automated claim tracker using local LLM inference. One of these projects received a public acknowledgment from a Google Developer Advocate.
On the enterprise side I have delivered complex frontend and full-stack systems for clients including Citi Bank, McGraw Hill, Mondee, and Old Mutual — handling framework migrations, performance optimization, state architecture, and secure access control across large-scale platforms.
I work with full ownership. I take a problem from architecture through deployment and I do not need hand-holding to get there. If you need someone who can think through a system, build it cleanly, and ship it reliably — I am available immediately.
Working hours
- Monday:10h00 To 20h00
- Tuesday:10h00 To 20h00
- Wednesday:10h00 To 20h00
- Thursday:10h00 To 20h00
- Friday:10h00 To 20h00
- Saturday:Not available
- Sunday:Not available
![Website Creation]()
Website Creation250 $End-to-end SaaS and portfolio web application development. From architecture through deployment — React or Angular frontend, Node.js backend, MongoDB, payment integration, and cloud infrastructure s ...![Artificial Intelligence (AI)]()
Artificial Intelligence (AI)30 $ - Per hourAI integration and LLM-powered application development. Specialising in RAG pipelines, tool-gated function calling, Gemini API integration, agentic workflows, and MCP server implementation for AI ...![Web Development]()
Web Development25 $ - Per hourFull stack web application development using Angular, React, and Node.js. Specialising in scalable frontend architectures, REST API development, real-time WebSocket systems, and production deployment ...
Led end-to-end frontend modernization and feature engineering across multiple enterprise platforms, improving
performance, scalability, and maintainability using Angular, RxJS, and NgRx
Enhanced accessibility(A11y) compliance and user experience in McGraw Hillʼs Boards and Beyond platform by
implementing narrator support and accessibility features aligned with standards.
Enabled data-driven product decisions by integrating Pendo and Churnzero analytics into the Learners application,
capturing user behavior insights for feature optimization.
Spearheaded migration of CKEditor4 to CKEditor5, including development of a custom S3-integrated file manager using
javaScript and Webpack5, eliminating dependency on third-party paid solutions.
Modernized a legacy Angular 8 application by migrating it to version 21, resulting in superior load times, minimized bundle
sizes, and the implementation of robust security standards across the platform.
Strengthened platform security by implementing robust RBAC, secure impersonation flows, and improved session handling
across enterprise systems.
Optimized real-time user engagement systems by implementing Firebase push notifications and improving feed reliability,
reducing interaction failures and latency issues.
performance, scalability, and maintainability using Angular, RxJS, and NgRx
Enhanced accessibility(A11y) compliance and user experience in McGraw Hillʼs Boards and Beyond platform by
implementing narrator support and accessibility features aligned with standards.
Enabled data-driven product decisions by integrating Pendo and Churnzero analytics into the Learners application,
capturing user behavior insights for feature optimization.
Spearheaded migration of CKEditor4 to CKEditor5, including development of a custom S3-integrated file manager using
javaScript and Webpack5, eliminating dependency on third-party paid solutions.
Modernized a legacy Angular 8 application by migrating it to version 21, resulting in superior load times, minimized bundle
sizes, and the implementation of robust security standards across the platform.
Strengthened platform security by implementing robust RBAC, secure impersonation flows, and improved session handling
across enterprise systems.
Optimized real-time user engagement systems by implementing Firebase push notifications and improving feed reliability,
reducing interaction failures and latency issues.
Enhanced location intelligence by integrating Google Places API, enabling accurate search and improved user navigation
experience.
Developed advanced search and trip management features, including client-side trip cancellation workflows, improving user
control and flexibility.
Strengthened application architecture by implementing authentication flows, route guards, resolvers, currency pipes, input
validation directives and HTTP interceptors for secure and efficient data handling
Led internationalization (i18n) implementation, enabling multi-language and multi-currency support for global market
expansion
experience.
Developed advanced search and trip management features, including client-side trip cancellation workflows, improving user
control and flexibility.
Strengthened application architecture by implementing authentication flows, route guards, resolvers, currency pipes, input
validation directives and HTTP interceptors for secure and efficient data handling
Led internationalization (i18n) implementation, enabling multi-language and multi-currency support for global market
expansion
Delivered scalable, cross-browser enterprise applications for financial clients including Old Mutual and Citi Bank, ensuring
high reliability and performance.
Modernized legacy systems by migrating applications from Angular 4 to Angular 8 and from JavaScript/Adobe Flex to
Angular frameworks.
high reliability and performance.
Modernized legacy systems by migrating applications from Angular 4 to Angular 8 and from JavaScript/Adobe Flex to
Angular frameworks.
- 🇬🇧 English
- 🇮🇳 Hindi
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