• Developed APIs from scratch to power mobile apps and web applications, handling high user volumes and complex business logic. • Designed and implemented backend services using Django and FastAPI, following microservices architecture and RESTful API best practices. • Built and maintained frontend components in React, implementing reusable UI elements, Redux-based state management, and seamless API integration. • Architected and launched a Progressive Web App (PWA) with a focus on scalability, performance, and cross-device compatibility. • Optimized React rendering performance using code-splitting, lazy loading, and memoization techniques. • Integrated Kafka and RabbitMQ for asynchronous message processing, event-driven workflows, and data pipelines. • Worked extensively with AWS services, DynamoDB, Elasticsearch, and containerized deployments using Docker and Kubernetes. • Contributed to AI/ML-driven features, including: o Integrating ML-powered recommendation and scoring APIs into backend services. o Consuming prediction outputs from trained ML models to enhance business decision workflows. o Implementing data ingestion pipelines used for model training and inference. o Supporting AI-based search and relevance ranking using Elasticsearch and vector-based querying approaches. • Collaborated closely with data scientists and ML engineers to productionize models and expose them via scalable APIs. • Mentored junior developers, improving overall team productivity, code quality, and architectural consistency.

• Built React and JavaScript front-end interfaces for mapping vehicle locations using Leaflet maps. • Developed custom components for geolocation-based data visualization and live updates. • Integrated REST APIs with React for dynamic data rendering. • Worked on AI/ML-aligned use cases, including: o Visualizing outputs from optimization and analytics engines related to vehicle routing and positioning. o Supporting data preprocessing and frontend representation of algorithm-driven insights. • Performed unit testing using Selenium and Django testing frameworks.

• Migrated existing products to the latest stable versions of Django and Elasticsearch, improving stability and performance. • Developed real-time notification and chat systems using Django Channels and WebSockets. • Designed and implemented React-based dashboards for visualizing Elasticsearch data with interactive charts, tables, and filters. • Integrated REST APIs into React applications using Redux and React Hooks for efficient state management. • Visualized analytical data using Kibana dashboards to support operational and business insights. • Integrated Stripe for secure online payment processing. • Worked with data-driven features, including: o Implementing backend data aggregation logic to support analytical views. o Enhancing search relevance and filtering logic based on structured and semi-structured data. • Wrote unit tests and deployed applications on DigitalOcean using containerized environments.