Apr 2019 – Jul 2020 · 1 yr 3 mos · Gurugram, Haryana, India

• Working on the Backend for Frontend (BFF) architecture pattern
• Architected and developed highly scalable cloud-based micro-services using .net core 3.1 to serve huge traffic for a leading OTA portal in USA (www.cheapoair.com)
• Improved the flight search response time to 5sec average from 11 sec
• Reduced delivery time to 4-6 minutes from 6-7 hours
• Implemented API gateways with Ocelot
• Integrated Slack group notification to monitor API health check to ensure 24/7 service availability
• Implemented retry mechanism/circuit breaker using Polly in the event of any failure in the downstream systems
• Implemented Command Query Segregation (CQRS) and Domain Driven Design pattern
• Reduced the dependencies between objects using MediatR and the mediator design pattern
• Integrated ELK stack for application logging and profiling
• Integrated App Insight for application monitoring and custom events
• Wrote fully testable code with more than 80% code coverage to meet SonarQube coding guideline and best practices
• Used Azure CI/CD pipeline to automate the deployments of various micro-services on docker based environment
• Hands on experience in configuring alerts, monitoring the infrastructure and distributed tracing
• Designed and setup front-end architecture/code base using React
• Configured route based code splitting technique to reduce bundle size and improve page loading time using react lazy which reduced initial bundle file size to 350kb approx. from 1.9 mb
• Configured eslint to maintain high code quality and error free code using Typescript
• Integrated Mobx for state management
• Followed atomic design and written re-usable components
• Strictly followed container and presentation components concept to pass state data down to the child components and propagating actions to the parent

Aug 2017 – Jun 2018 · 10 mos · Gurugram, Haryana, India

• Worked on web scrapper to generate competitor reports using .Net and Luminati proxy service
• Re-architected legacy systems to improve performance and adhere to modern design patterns with extensibility and reusability as the focus
• Implemented google protobuf for serializing structured data
• Worked on frontend application to populate reports using Angular 6
• Added unit test cases and integration test
• Worked on multi-threading to handle background jobs to import and export data

Jun 2018 – Mar 2019 · 9 mos · Bahrain

• Led and migrated monolithic code base into cloud based micro-service architecture of an online flight/hotel/car/tour booking platform.
• Defined, managed engineering process to handle service implementation and integration
• Designed and developed flight search engine in .net core 2.0 to handle concurrent search request (average response time was 3 sec)
• Implemented API Healthcheck to list out availability of dependent services and database to ensure high availability
• Implemented DDD, CQRS and event souring to communicate within dependent services
• Integrated RabbitMQ for message queuing and configured the exchanges, message queues and its durability for service interaction
• Effective caching data in Redis cache and tuning the performance of search service
• Developed highly configurable rule engine to apply discount/coupon on flight search based on routes, country, city, customer etc.
• Integrated Amadeus, Sabre, Travel port and various airlines to provide flight search content
• Worked on customer facing search web application using React
• Integrated Redux for application state management
• Worked on Redux with Saga for asynchronous API calling
• Developed middleware to centralize application validation, request and response processing
• Had written various re-usable styled components to adapt dynamic styling

Oct 2016 – Jul 2017 · 9 mos · Noida, Uttar Pradesh, India

• Developed REST APIs (Web API 2.0) using .net to handle EHR (Electronic Health Record) system
• Worked on EF (Code First Approach), Ado.Net and LINQ
• Developed Client registration portal of EHR application using Angular JS 1.6
• Developed API using node js to upload reports into MongoDB
• Written unit test cases using MS Test
• Handling client calls to gather business requirement, conducting system analysis and finalizing technical flow
• Handled release process through TFS

Apr 2015 – Oct 2016 · 1 yr 6 mos · Noida, Uttar Pradesh, India

• Developed Instant Mutual Fund investment portal using MVC 5
• Integrated Axis Bank services to process payment using Axis Bank Netbanking
• Integrated CVL KRA API to verify PAN instantly
• Integrated third party SMS API to send messages to customers post payment
• Worked on SQL Queries, Triggers and Cursors to generate report for financial applications
• Worked on Expense Manager, portal to manage company internal expenses and billing backend
• Followed the secure coding practices in banking domain, secured the application using https/ssl certificates

Apr 2013 – Apr 2015 · 2 yrs · Faridabad, Haryana, India

• Developed ACH (Automated Clearing House) application to auto deduct EMI from customer bank account using C# .Net and Windows Service
• Integrated third party payment gate PaymentSite
• Worked on Lease Tracking Portal to manage customer leases and monthly emi details
• Followed the secure coding practices in banking domain, secured the application using https/ssl certificates
• Written complex logic in c# using concurrent collections, worked on dependency injections, inversion of control to achieve loosely coupling
• Developed application using Singleton, Factory, Façade and Proxy design patterns