Arnab Das

• API Engineering: Developed advanced Node.js APIs enabling seamless data retrieval through web scraping, PDF text extraction, and MongoDB integration, boosting data indexing speed by 40%.
• AI-Powered Search: Created Python-based APIs utilizing Chroma DB and Pinecone for vector-based search capabilities, improving search result accuracy by 25%.
• AI Model Integration: Integrated OpenAI Large Language Models (LLMs) to enhance chatbot intelligence, enabling accurate, context-aware . responses and improving user engagement.

• Real-Time Communication: Designed and optimized socket-based communication infrastructure for real-time interaction across mobile platforms, ensuring 99% uptime.
• Push Notifications: Implemented Firebase Cloud Messaging (FCM) and web push notifications, increasing user retention through personalized notifications.
• Enhanced Security: Upgraded FCM to HTTPS v1, boosting notification security and reducing data breaches by 30%.
• App Deployment: Managed Android app releases on Google Play Console with automated updates via EXPO EAS, reducing manual deployment efforts by 50%.
• Video Conferencing: Built a scalable Proof of Concept (PoC) for two-user video conferencing using WebRTC and Socket.io, enabling high-quality virtual consultations.

Core Application Enhancements (Onfit): Delivered a suite of enterprise-grade features for Onfit app, including:

• File Management: Advanced file-sharing with integrated PDF previews.
• Chat System: Enhanced chat with reply, edit, and delete functionalities.
• Patient Dashboard: Developed interactive patient dashboards with real-time data visualization.
• Metadata-Driven UI: Built dynamic UI updates through metadata-driven APIs.
• Google Fit Integration: Streamlined health data synchronization with Google Fit API.
• Workflow Automation: Automated cosmetology and prescription workflows, improving clinical efficiency.

• Scalable Backend System: Designed backend architecture enabling real-time tracking of government social schemes across rural and remote regions, boosting policy transparency.
• Data Management: Developed dynamic content upload mechanisms supporting multi-platform visibility and reducing administrative delays by 40%.
• Data APIs: Created high-performance APIs for instant data retrieval, driving informed decision-making and better policy execution.
  

• Automated HR workflows with Groovy scripts, minimizing manual tasks by 60%.
• Ensured a 99.9% uptime by debugging production-grade enterprise tools.
• Enhanced the Angular-based front-end system, improving client satisfaction scores by 25%.

• Developed user-centric e-commerce dashboards with NextJS and Node.js, cutting downtime by 30%.
• Built real-time order management APIs, enabling seamless synchronization across multiple platforms.

• Led front-end development for enterprise SaaS products, reducing customer onboarding time by 30%.
• Built a fully responsive company website using ReactJS and NextJS, boosting user engagement by 40%.
• Developed core front-end modules for the in-house SRM platform, cutting service request handling time by 20%.

• Developed secure APIs for payment management in FinTech applications, reducing payment processing errors by 35%.
• Delivered responsive and user-friendly front-end components using Next.js and TypeScript.

• Enhanced a hospital management system’s front-end, reducing page load time by 25%.
• Integrated secure medical record APIs, ensuring HIPAA compliance.

• Built OTP-based registration with JWT authentication, increasing onboarding success rates by 30%.
• Integrated Razorpay payment gateway, ensuring smooth financial transactions.

• Developed a hyperlocal business management platform, boosting business visibility by 40%.
• Created personalized product recommendations, enhancing user retention.

• Developed a responsive expense management system, improving budget tracking accuracy by 45%.
• Built REST APIs for real-time expense monitoring and reporting.