About

Rajat Kamboj is a highly skilled software development engineer with over 4 years of professional experience in designing and developing Fintech applications and social hybrid apps. He has worked and studied on two continents, gaining technical and cross-cultural skills. Rajat has experience with major global organizations like Infosys and small social media startups. Rajat has expertise in Java, Python, Node.js, and Spring Framework, amongst others. He has led the complete design and implementation of a mobile app, which was accepted into Google for Startups Cloud program within 9 months, rewarding $200K in credits. He has also developed the backend along with REST APIs and database (Firestore & PostgreSQL) to support mobile functionality using Java, Node.js, and Python. Currently working as a Software Development Engineer at CITIZN, Rajat has led the complete design, implementation, and maintenance of a mobile app, which was accepted into Google for Startups Cloud program. He has developed the backend along with REST APIs and database (Firestore & PostgreSQL) to support mobile functionality using Java, Node.js, and Python. He has expertise in various components in Spring, such as IOC, AOP, Spring JDBC, and Spring MVC. Rajat has set up environments to develop a hybrid mobile app using Ionic and GCP (Cloud Run, SQL, Scheduler, Functions, Secret Manager, Pub/Sub, Tasks). He has automated deployments on GCP environments using GitLab CI/CD, Docker, and Trapeze through a single code base stored on GitLab. Rajat has created an authentication layer with 2FA for the backend to authenticate ID tokens and implement Firebase App Check using Firebase Admin Java library. He has set up a logging structure in various microservices and cloud build using YAML files, configuration settings, and environment variables. Rajat has created a storage system for passwords, API keys, and certificates using Secret Manager and built functions for automatically rotating passwords. He has created and managed data seed and migration to PostgreSQL database using cloud SQL proxy. Rajat has created DB schemas and models and implemented DAO layers using Hibernate, Objection.js, Knex.js, and SQL Alchemy in various microservices. He has validated request schemas using express-validator, Flask, and Spring REST. Rajat has implemented Push Notifications using Firebase Cloud Messaging by registering FCM tokens and added functionality to send custom notifications through an admin portal. He has also implemented various NLP features such as profanity check