Hello, I'm

Reddy Harsha Vardhan

Software Engineer

Missouri (Open to Relocate)

Software Engineer with 4+ years of experience designing and developing scalable, cloud-native web applications. Proficient in full-stack development, including frontend frameworks such as React.js, Next.js, TypeScript, and Tailwind CSS, alongside backend expertise in Java (Spring Boot, Hibernate), Node.js, and microservices within Agile environments. Experienced in deploying and managing applications on AWS using Docker, Kubernetes, Terraform, and CI/CD pipelines. Skilled in database architecture across SQL and NoSQL databases with experience in event-driven architectures leveraging Kafka.

My Resume Contact Info

About Me

Portrait of Reddy Harsha Vardhan

Software Engineer @ PayPal

I'm Reddy Harsha Vardhan, a Software Engineer with 4+ years of experience designing and developing scalable, cloud-native web applications. Proficient in full-stack development, including frontend frameworks such as React.js, Next.js, TypeScript, and Tailwind CSS, alongside backend expertise in Java (Spring Boot, Hibernate), Node.js, and microservices within Agile environments.

Experienced in deploying and managing applications on AWS using Docker, Kubernetes, Terraform, and CI/CD pipelines (GitHub Actions, Jenkins, GitLab). Skilled in database architecture and optimization across SQL and NoSQL databases (PostgreSQL, MySQL, MongoDB, DynamoDB, Cassandra), with experience in event-driven architectures leveraging Kafka. Strong knowledge of application security with OAuth2, JWT, and Spring Security.

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Education

Master of Science in Computer Science

University
Saint Louis University
Location
Saint Louis, Missouri
4+
Years Experience
Software Engineering
15K+
Events/Minute
Transaction Throughput
99%+
Deployment Success
Kubernetes Deployments
$450K
Cost Savings
Infrastructure Optimization

Professional Experience

September 2024 – Present

Software Engineer

PayPal, United States

  • Improved reliability of core payment services by enhancing Java and Spring Boot microservices with concurrency-safe execution, idempotent APIs, and asynchronous processing, reducing duplicate transaction handling by 28% and preventing inconsistent state propagation.
  • Reduced latency in distributed payment workflows by integrating Apache Kafka with partitioned topics, controlled retries, and dead-letter handling, improving transaction throughput by 15,000 events per minute during peak load.
  • Supported cloud infrastructure on AWS (EC2, ECS, Lambda, S3, DynamoDB) and contributed to Terraform-based provisioning, standardizing environments and improving deployment reliability across staging and production.
  • Boosted observability by implementing CloudWatch, Prometheus, and Grafana dashboards with real-time alerts, log aggregation, and service-level indicators, increasing anomaly detection coverage by 2.5X compared to previous monitoring.
  • Refined system resilience by applying circuit breakers, rate limiting, and graceful degradation, reducing user-facing payment errors from 120 incidents per month to 45 during dependency outages.
  • Configured containerized deployments using Docker and Kubernetes, implementing rolling updates and auto-scaling, which increased deployment success rate to >99% and minimized rollback frequency.
  • Participated in API and system design reviews, contributing to request validation, pagination, backward compatibility, and distributed data consistency, improving long-term maintainability.
  • Enhanced user-facing experiences by developing React-based components with Redux Toolkit, optimizing render efficiency and cutting memory usage by 20%, improving overall web platform responsiveness.
  • Fine-tuned release quality by contributing to CI/CD pipelines, automated testing with JUnit and Mockito, and structured code reviews, reducing post-deployment defects by 25%.
October 2020 – July 2023

Software Engineer

LTIMindtree, India

  • Developed and maintained Java-based backend services using Spring Boot and REST APIs for a high-performance financial platform, increasing request handling capacity from 1200 to 1650 requests per minute and supporting concurrent integrations with downstream systems.
  • Delivered full stack functionality using Java, Spring MVC, React, and REST APIs, reducing feature turnaround time by 30% through reusable UI components, standardized service contracts, and consistent error-handling across modules.
  • Designed and implemented an internal monitoring dashboard using React and Node.js, reducing manual service health checks and feature flag verifications by 40%, while providing real-time visibility and alerts for engineering teams.
  • Optimized SQL queries, indexing strategies, and schema usage, improving application responsiveness and efficiency during concurrent workloads with high query volumes.
  • Established and maintained CI/CD pipelines with Jenkins, Docker, and Git, improving deployment reliability and decreasing rollback incidents by 2X.
  • Provisioned cloud deployments on AWS (EC2, Elastic Beanstalk, S3, RDS), performing resource right-sizing, storage optimization, and automated scaling, contributing to approximately $450K in infrastructure cost savings over multiple releases while maintaining high availability.
  • Implemented Redis caching and MongoDB-based NoSQL storage for frequently accessed transaction and user session data, reducing database read load and improving overall API response times under concurrent workloads.
  • Strengthened platform security using Spring Security, OAuth2, JWT, and role-based access controls, ensuring secure service-to-service and user-level authorization, auditing authentication logs, and maintaining sub-150ms average API response times.
  • Collaborated in Agile development cycles, actively participating in sprint planning, backlog grooming, code reviews, and defect triage, reducing defect resolution time by 35% and improving sprint delivery predictability and team velocity.

Featured Projects

Smart Banking Query Assistant

Java Spring Boot React Redux Toolkit PostgreSQL Redis LangChain OpenAI GPT API Docker Kubernetes AWS

Constructed an AI-powered banking assistant using LangChain and GPT APIs, enabling multi-turn conversational queries for account balances, transaction history, and payment instructions, handling 80 concurrent simulated user sessions at same time. Built a React + Redux frontend integrated with Spring Boot backend and PostgreSQL, leveraging Redis caching for efficient session retrieval, ensuring smooth response times and seamless user experience during simulations.

View Code

Real-Time Portfolio Management Platform

Java Spring Boot React TypeScript MongoDB Redis OpenAPI Docker AWS

Programmed a portfolio management SaaS platform integrating OpenAPI feeds for real-time stock, mutual fund, and crypto tracking, enabling users to monitor up to 500 simulated assets per portfolio with sub-2-second dashboard update latency. Applied backend services with Spring Boot and MongoDB, while Redis caching and asynchronous processing ensured fast portfolio data updates to React-based dashboards, improving simulated user workflow efficiency and providing real-time insights for portfolio adjustments.

View Code

Technical Skills

Languages

  • Java
  • TypeScript
  • JavaScript
  • Python
  • SQL
  • GraphQL

Frontend

  • React.js
  • Next.js
  • Angular
  • Redux Toolkit
  • Tailwind CSS
  • Material UI
  • HTML5
  • CSS3
  • SASS

Backend

  • Spring Boot
  • Node.js
  • Express.js
  • GraphQL
  • RESTful APIs
  • Hibernate
  • JPA
  • Apache Kafka
  • RabbitMQ

Databases

  • PostgreSQL
  • MongoDB
  • MySQL
  • DynamoDB
  • Redis
  • Cassandra

AI & LLMs

  • Generative AI
  • LLMs (BERT, GPT, RoBERTa)
  • LangChain
  • OpenAI GPT API
  • Prompt Engineering

Cloud / DevOps

  • AWS (EC2, S3, Lambda, DynamoDB, RDS, API Gateway, EKS, Elastic Beanstalk)
  • Docker
  • Kubernetes
  • Terraform
  • Jenkins
  • GitHub Actions
  • GitLab CI/CD
  • Kafka
  • Prometheus
  • Grafana
  • CloudWatch

Achievements & Leadership

🏆

Core Committee Member

IEEE - SPS, VIT University

Served as a core committee member of IEEE Signal Processing Society, contributing to technical events and initiatives

👔

Vice President

LEO Club, VIT University

Worked as Vice President of LEO Club, leading community service initiatives and organizational activities

☁️

AWS Certified

Cloud Practitioner

AWS Certified Cloud Practitioner, demonstrating foundational knowledge of AWS cloud services and architecture

🎯

Agent Force Specialist

Certification

Certified Agent Force Specialist, showcasing expertise in specialized technical domains

Get In Touch

Let's Connect

I'm always interested in discussing new opportunities, innovative projects, and collaborative ventures in full-stack development, AI-powered systems, and microservices architecture.

harsha.r@savemymails.com +1 (201) 690-7016 LinkedIn GitHub Portfolio