‣ Designed and implemented the database structure for multiple projects, including vehicle tracking, corporate user services, billing automation, truck access share, vehicle verification, and driver profile pool in the admin panel and user apps (Shipper/Owner) using MySQL Workbench.‣ Developed REST APIs using Node.JS/Express for GPS playback, stop time, geofence management, GPS alerts, account termination, vendor performance report, vendor-driver/truck tag, vendor billing, credit trip eligibility check, trip history and invoice, user login, trip filter, notifications and other features for Shipper, Owner, and Admin Panel projects.‣ Established database connections and stored structured data, such as user validation status and truck information, in a relational database (MySQL) and semi-structured, bulk data such as GPS tracking data in MongoDB.‣ Implemented secure user authentication in APIs using custom middleware with JWT, and ensured data security by encrypting access tokens and login OTPs using the Crypto library for login and MFS (mobile financial services) disbursement.‣ Validated API request bodies using Joi and made external API calls to SMS sending services and FCM services using Axios.‣ Wrote and maintained unit and integration tests for APIs using Jest.‣ Documented APIs using Swagger and automated project deployment using PM2.

‣ Designed and implemented RESTful APIs using Node.js and Express for an admin panel (expense entries) with functionality for creating, updating, and retrieving data.‣ Implemented authentication using JSON Web Tokens (JWT) via custom middleware.‣ Designed an Entity-Relationship (ER) diagram in MySQL Workbench for the Challan V3 client systemUtilized Knex.js for database migrations and seeding.‣ Used Objection.js for building database models, mapping relationships, and querying data.‣ Utilized RabbitMQ for email queuing and resending in case of failure.‣ Used Semantic UI to create templates for receipts, invoices, etc.‣ Utilized Handlebars to compile templates for receipts, invoices, etc.

‣ Utilized Retrofit for JSON parsing and API calls to implement ride history, promo codes, OTP, and fare estimation in OBHAI apps.‣ Integrated Google Maps APIs (Places, Geocode, Directions, etc.) and other SDKs like Dingi and Mapbox.‣ Developed ‘OBHAI Express’ B2B delivery service within the driver app.‣ Designed UI using RecyclerView, Expandable ListView, CardView, Navigation Drawer, and Bottom Sheets with libraries like Picasso, Glide, Lottie, and Calligraphy.‣ Displayed recent searches via Room Database and implemented data pagination.‣ Developed ride request popups, custom animations, and a chat notification system with Firebase Cloud Functions and FCM.‣ Implemented Firebase Analytics for tracking application feature usage count.