Hey! I am

Arihant Rajesh Chhajed

I'm a

About

About Me

Experienced Software Developer currently working at Expedia Group to make travel easier for everyone. A professional with a Master's degree in Computer Science from The University of Texas at Dallas, specializing in Data Science. Hungry for challenges and ever learning persona with 6+ years of industry experience in full-stack development, cloud architecture, and data engineering.

My Promise: Give me a problem and I will design solution for you. Give me your requirements and I will make application for you.

  • Name: Arihant Rajesh Chhajed
  • Date of birth: August 02, 1994
  • Address: Austin TX 78728 USA
  • Zip code: 78728
  • Email: arihant_chhajed@yahoo.in
  • Phone: +1-682-246-8454

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Education

2018-2020

Master of Science in Computer Science

University of Texas at Dallas

Major: Computer Science
Specialization: Data Science
Coursework

  • Software Defined Network
  • Algorithmic Aspects of Telecommunication Networks
  • Implementation of Data Structures and Algorithms
  • Design and Analysis of Computer Algorithm
  • Information Retrieval
  • Big Data Analytics and Management
  • Natural Language Processing
  • Database Design
  • Statistical methods of Data Science
  • Machine Learning
  • Convolution Neural Networks

2012-2016

Bachelor of Engineering in Computer Engineering

University of Mumbai

Major: Computer Engineering
Coursework

  • Operating Systems
  • Design and Analysis of computer algorithm
  • Data Structures
  • Web Programming languages
  • Artifical Intelliogence
  • Computer Networks
  • Many more...

Experience

Apr 2025-Present

Software Development Engineer III

Expedia Group - Austin, Texas

  • Leading high-performance Scala-based Spark applications processing over 100,000 daily documents
  • Designing intelligent data aggregation from multiple enterprise sources
  • Implementing advanced data processing solutions with Apache Kafka
  • Technologies: Apache Kafka, Java, Scala, Spark, AWS, Spring Boot, Microservices

Apr 2022-Apr 2025

Software Development Engineer II

Expedia Group - Austin, Texas

  • Built high-performance Scala-based Spark applications processing over 100,000 daily documents through intelligent data aggregation from multiple enterprise sources
  • Designed and deployed serverless microservices architecture using AWS Lambda, DynamoDB, and SES for automated document metadata processing and email notifications, reducing manual processing overhead by implementing event-driven workflows
  • Modernized legacy technology stack by upgrading 10+ applications from Java 1.7 to Java 17, improving performance, security, and maintainability while reducing technical debt
  • Transformed deployment processes by migrating CI/CD pipelines from Jenkins to GitHub Actions, streamlining development workflows and reducing deployment time through automated testing and deployment strategies
  • Created an automated rule engine for streamlined business process validation, implementing customizable logic for multiple validation criteria while maintaining consistent processing performance and data integrity
  • Established comprehensive technical documentation standards for legacy systems, improving knowledge transfer and reducing onboarding time for new team members
  • Technologies: Amazon Web Services (AWS), Spring Boot, Scala, Spark, Apache Kafka, Java, DynamoDB, Lambda, GitHub Actions

Jan 2021-Apr 2022

Software Development Engineer I

Expedia Group - Austin, Texas

  • Successfully migrated 15 critical VRBO Kafka topics from legacy infrastructure to Expedia Group Streaming Platform (EGSP), handling over 80,000 daily events with zero production downtime
  • Led end-to-end schema transformation by converting AVSC formats to AVDL, ensuring seamless compatibility with EG standards
  • Overcame significant technical challenges including limited EGSP documentation and architectural disparities between VRBO and Expedia Group Kafka infrastructures
  • Designed and implemented robust integration solutions that enabled smooth event production to new topics while maintaining full backward compatibility and service reliability
  • Technologies: Apache Kafka, Java, Scala, AVSC/AVDL, Expedia Group Streaming Platform, Microservices

Jan 2020-Dec 2020

Graduate Research Assistant - Backend Engineer

University of Texas at Dallas - Richardson, Texas

  • Reduced application deployment cost by 80% through developing serverless backend services in GraphQL and REST
  • Developed an interactive web application by integrating a Unity WebGL app, coordinating with 8 developers to gather requirements and provide backend services
  • Integrated a GitHub Kanban board with Google Forms using GS scripting for efficient bug reporting
  • Implemented continuous integration and created deployment scripts for automated deployment in AWS
  • Built REST and GraphQL APIs for CRUD operations using Express/Node.js and developed DynamoDB schemas
  • Secured application with user authentication and role-based authorization using JSON Web Tokens
  • Streamlined user permission management for secure document sharing in the backend
  • Engaged colleagues to refine work items, obtain new features, and negotiate technical obstacles
  • Provisioned CDN endpoints for the project website with SSL installation in AWS cloud platform
  • Technologies: NodeJS, AWS, GraphQL, REST, Express.js, DynamoDB, JWT, Unity WebGL, AWS Lambda, AWS API Gateway

Feb 2019-Jan 2020

Student Cloud Engineer

University of Texas at Dallas - Dallas, TX

  • Created an automation script for auto shutdown and restart of virtual machines at speculated times, saving almost 40% cost
  • Created a DevOps pipeline to trigger Alexa skill deployment on code commit in GitLab
  • Developed a customized Unix Docker image for AWS Batch to run monthly batch jobs for generating bill invoices, saving 4-5 days of manual work each month
  • Acted as a Full Stack Developer, writing and reviewing code for 5 official UTD Alexa skills deployed on 156 devices on campus
  • Technologies: Git, NodeJS, Python, AWS Lambda, AWS SNS, JIRA, AWS Batch, EC2, Elastic Search, Logstash, Kibana, MySQL, Docker, GitLab

Nov 2018-Jan 2019

System Engineer

Tata Consultancy Services - Mumbai, Maharashtra, India

  • Designed a reusable web application framework for Medibot (Chatbot app), leveraging an open-source serverless application model, which allowed for quicker time-to-market and reduced development costs
  • Technologies: Serverless Architecture, Web Application Framework, Open Source Technologies

Nov 2017-Oct 2018

Assistant System Engineer

Tata Consultancy Services - Mumbai, Maharashtra, India

  • Designed and developed a chatbot application with multi-channel integration using Google Dialogflow, AWS Lex, MS LUIS Bot framework, and Kore.AI
  • Developed and designed architecture of Medibot-A digital assistant (Chatbot) to assist both doctors and patients on Pfizer medicines which serves 1.5 million users
  • Represented organization in Drupal Camp Mumbai 2018 and demonstrated integration of Alexa, chatbots and various other smart applications with Drupal
  • Active open source contributor-Reported bugs in AWS SAM GitHub repository and provided suggestions to fix them
  • Technologies: Git, Nodejs, Java, Python, ReactJS, AngularJS, Jenkins, MongoDB, AWS Lambda, AWS Lex, Microsoft LUIS, Google Dialogflow, Kore.AI, Shell scripting, Handlebars, ExpressJS, AWS EC2, AWS API Gateway, REST, Web Push Notifications

Nov 2016-Oct 2017

Assistant System Engineer-Trainee

Tata Consultancy Services - Mumbai, Maharashtra, India

  • Completed comprehensive training program covering software development methodologies, programming languages, and industry best practices
  • Gained hands-on experience in full-stack development and cloud technologies
  • Participated in various projects to build foundational skills in software engineering
  • Technologies: Java, Python, Web Development, Database Management, Cloud Computing

Skills

Java

90%

Python

80%

NodeJS

75%

ReactJS

80%

Scala

80%

AWS

90%

Azure

95%

MySql

85%

Hadoop

70%

MongoDB

80%

Zookeeper

80%

Html/CSS

80%

GraphQL

80%

RESTful Service

80%

Apache Solr & Nutch

80%

Apache Kafka

90%

Scala

85%

Apache Spark

85%

Google Dialogflow

80%

Unity WebGL

75%

Docker

85%

JWT Authentication

85%

Kore.AI

75%

Kotlin

80%

PostgreSQL

85%

GCP

75%

Dropwizard

80%

gRPC

75%

Kubernetes

80%

Spinnaker

70%

Comprehensive Technical Skills

Programming & Scripting Languages

Kotlin, Java, Scala, Python, C, NodeJS, ReactJS

Database Systems

MySQL, PostgreSQL, MongoDB, Hadoop

Cloud Computing

AWS, Azure, GCP, Heroku

Web Frameworks

Dropwizard, Spring Boot, MEAN Stack, MVC .NET, REST, GraphQL, gRPC

ML/AI & NLP

Regression, Random Forest, SVM, Topic Modeling, Gradient Boosting, Brill's Tagging, Sentence Parsing, Semantic Similarity

DevOps

GitHub, Docker, Kubernetes, Jenkins, Spinnaker

Paper Publications

May 2016

PC Assembly based on User Bench mark

Final year Undergraduate

Download

Certifications

Jun 2018-Jun 2021

AWS Certified Developer - Associate

Amazon Web Services

The AWS Certified Developer - Associate examination is intended for individuals who perform a development role and have one or more years of hands-on experience developing and maintaining an AWS-based application. Credential ID: J0VPL7S2JNR4QP53

Jan 2025-Jan 2028

AWS Certified Solutions Architect - Associate

Amazon Web Services

The AWS Certified Solutions Architect - Associate examination is intended for individuals who perform a solutions architect role and have one or more years of hands-on experience designing available, cost-efficient, fault-tolerant, and scalable distributed systems on AWS. Credential ID: c9552bbeda974707b48e35d21b63213c

Aug 2019-Aug 2022

AWS Certified Machine Learning - Specialty

Amazon Web Services

The AWS Certified Machine Learning - Specialty certification is intended for individuals who perform a development or data science role. It validates a candidate's ability to design, implement, deploy, and maintain machine learning (ML) solutions for given business problems. Credential ID: QFV8CZEKMEV4QNW7

Sep 2020

REST API Certificate

HackerRank

Certification demonstrating proficiency in REST API development and implementation, covering best practices for designing, building, and consuming RESTful web services.

Awards

July 2018

Technical Excellence Award

Tata Consultancy Service

For successful completion of project single handedly.

May 2018

Learning Excellence Award

Tata Consultancy Service

For gaining competency in various technologies.

Sep 2017

Star of the Quarter

Tata Consultancy Service

For best performance in 3rd quarter

Jan 2017

ILP kudos Award

Tata Consultancy Service

Best performance in initial learning program (ILP)

0 Awards
0 Experience(Years)
0 Certifications
0 Academic & Industrial Projects

Blog

My Blog

Far far away, behind the word mountains, far from the countries Vokalia and Consonantia

Create VM scale sets from the existing VM in Azure Cloud

April 19, 2018 Arihant Chhajed 3

Step by step approach to create VM scale sets

Webhook for Slack "slash commands"

March 31, 2018 Arihant Chhajed 3

Explains step by step approach for creating slack slash commands