Vikas Ranjan

Architected and developed AI-driven communication systems including Care Connect and Lumi AI Chat, integrating LLM pipelines, real-time transcription, and conversational workflows. Built scalable backend APIs (Python) to support chat sessions, transcription pipelines, and data ingestion from Zoom and Chrome extension integrations. Led development of the Care Connect platform across Web, Chrome Extension, and Zoom marketplace, ensuring reliability across multiple environments. Architected and created a UI design system that set up the foundation for all Frontend applications across web, mobile and Chrome extensions. Designed database schemas and optimized queries across PostgreSQL for large volumes of conversation data. Implemented real-time streaming architecture for transcription and AI response generation with low-latency message delivery. Built internal tooling for AI prompt experimentation, telemetry tracking, and system monitoring to improve response quality.

Led a 20-engineers cross-functional team delivering large-scale learning platforms used by millions of students. Architected backend services and APIs supporting content delivery, user engagement tracking, and recommendation features. Introduced authentication, role-based access control, and session management across multiple product modules. Improved UI performance, led identification and fixing of application technical debts. Established CI/CD pipelines and automated testing workflows, reducing release cycles and improving deployment reliability. Defined technical roadmap and system architecture decisions, balancing delivery speed with long-term platform maintainability. Implemented engineering best practices including code reviews, observability improvements, and incident response workflows.

Owned the User Compliance platform, implementing regulatory workflows for KYC, identity verification, and risk detection across multiple regions. Designed backend services and APIs supporting compliance evaluation, document verification, and rule-based decision engines. Built secure data flows handling sensitive user information with strict auditability and compliance controls. Led frontend architecture improvements while collaborating closely with backend teams to maintain consistent data contracts and APIs. Led a team of 6 frontend engineers, optimised UI practices while addressing performance and accessibility issues.

Technical lead for a merchant platform used by thousands of restaurants and grocery merchants to manage catalogues, orders, pricing, and promotions. Architected scalable APIs and services enabling bulk catalogue uploads, merchant onboarding, and real-time order processing. Designed asynchronous processing workflows to handle large catalogue ingestion jobs without blocking merchant dashboards. Implemented authentication and authorization systems supporting merchant accounts, role-based access control, and secure integrations. Led backend and frontend architecture decisions across a 12-engineer team, ensuring scalability and maintainability. Improved platform performance and stability through observability, logging, and monitoring improvements. Delivered the Grocery Merchant Onboarding system, significantly reducing merchant onboarding time and improving catalogue data accuracy.

Developed scalable services powering the User Reviews and Feedback platform across multiple Expedia brands. Implemented A/B testing infrastructure to evaluate product improvements and increase review submissions. Executed the complete development of the NorthStar Design for the Hotels Post-Stay Review feedback form to boost review submission rates. Built APIs and backend services enabling dynamic review collection workflows and experimentation frameworks. Designed data models and optimized database queries to handle large volumes of review data. Collaborated with cross-functional teams to ensure seamless integration between backend services and frontend applications.

Contributed to the development of Sirion's enterprise Contract Lifecycle Management (CLM) platform, used by large enterprises to manage complex vendor contracts and procurement workflows. Designed and implemented full-stack features across the contract pre-signing module, enabling vendors to define work scopes and supplier relationships. Integrated frontend applications with backend APIs to support contract data ingestion, validation workflows, and document lifecycle management. Optimized UI performance and large dataset rendering for complex contract configurations used by enterprise clients.