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DHARSHAK SEMBETI - Java Full Stack Developer

[email protected]

Location: Baltimore, Maryland, USA

Relocation: yes

Visa: opt

Resume file: Dharshak Full Stack Java Developer_1752787294512.docx Please check the file(s) for viruses. Files are checked manually and then made available for download.

PROFESSIONAL SUMMARY Full Stack Developer having 4+ years of experience in designing, developing, and delivering Java/J2EE solutions, driving digital transformation across various industries through all phases of the SDLC. Designed enterprise systems using modern Java (8/11/17) lambdas, streams, virtual threads for concurrency records, sealed classes for domain modeling and pattern matching with Optional for business logic. Ensured the stability and performance of React and Angular applications by writing integration and unit tests using tools like Chai, Karma, and Jasmine. Conducted end-to-end testing with Cypress to validate user journeys and functionality, while adopting a component-driven approach to create reusable, consistent UI elements. Built and tested RESTful APIs and GraphQL endpoints, leveraging Swagger for API design, Postman for validation, and Wire Mock for third-party simulations, ensuring seamless integration and reliable system communication. Designed and built secure, scalable applications using the Spring ecosystem using IoC, Core, AOP, Boot, MVC, Security (OAuth 2, JWT, SSO), Accurate, SLF4j/Log4j 2/Logback, SOAP and REST web services, ensuring data integrity with Spring Transaction, Spring Data Access, and Spring Cache. Secured sensitive credentials using Hashi Corp Vault, AWS Secrets Manager, and Spring Cloud Vault, enabling Handled implementation of OOPS, TDD and BDD practices, using tools like JUnit, Mockito, and Cucumber to enhanced test coverage, boosted code reliability, and aligned development with business needs for faster, accurate feature delivery. Developed RESTful APIs using JSP, Servlets, and JSON/XML and Node JS to enable smooth system integrations, ensuring seamless data exchange and reliable communication between applications. Implemented comprehensive testing for Java and Spring Boot applications using JUnit 5, Mockito, Spring Boot Test, and Cucumber, ensuring robust, maintainable solutions. Created responsive user interfaces using HTML5, CSS3, Tailwind CSS, Bootstrap, JavaScript, TypeScript, jQuery and Ajax, focusing on delivering intuitive and engaging experiences for end users. Developed responsive Angular, React apps using Flex to Layout grids and Template Driven/Reactive Forms for validation and Flux, RxJS, Context API and NgRx for state management. Integrated WebSocket for real-time updates, Improved data handling (Virtual Scroll, Angular CLI), ngx-translate for multilingual support, Tree Shaking for bundle optimization. Implemented messaging systems like Apache Kafka, IBM MQ, RabbitMQ, and ActiveMQ to support event-driven architectures, enabling real-time data processing and reliability. Hands-on AWS expertise in designing, configuring, and managing scalable, secure, and automated cloud infrastructures. EC2, S3, IAM, RDS, SNS, SQS, Lambda, CloudFront, Route 53, CloudWatch, Terraform, CloudFormation, DynamoDB, SES, and Elastic Cache. Optimized data storage and retrieval using relational databases like Oracle, MySQL, PostgreSQL, alongside NoSQL solutions like MongoDB, DynamoDB, and Cassandra, balancing performance and flexibility. Streamlined development workflows by establishing robust CI/CD pipelines with Jenkins, managing configurations with Puppet, Chef and Ansible, and orchestrating cloud resources using OpenStack. Cultivated a security-centric DevOps culture by embedding automated security checks within CI/CD pipelines, ensuring early detection and remediation of vulnerabilities throughout the development lifecycle. Set up real-time monitoring with AWS CloudWatch, Splunk, and Log4j to track performance, resolve issues proactively, and ensure system stability. Deployed and optimized applications on WebSphere, WebLogic, JBoss, and Tomcat, ensuring high availability, performance, and load balancing for seamless front-end and back-end operations. Managed version control with Git, GitHub, GitLab, and Bitbucket, while employing build tools like Maven and Gradle to streamline project delivery and collaboration. TECHNICAL SKILLS Programming Languages Java (8/11/17), JavaScript, TypeScript, HTML5, CSS3, SQL, PL/SQL, Bash Frameworks & Libraries Spring Boot, Spring MVC, Spring Security, Spring Data JPA, Hibernate, JSP, Servlets, Node.js, RxJS, NgRx, Redux, React Hook Form, React Testing Library Frontend Technologies Angular, React.js, Redux Toolkit, Material UI, Bootstrap, Tailwind CSS, jQuery, Ajax, SCSS Testing & QA JUnit 5, Mockito, Cucumber, Jasmine, Karma, Cypress, Chai, Jest, JMeter, OWASP ZAP, SonarQube API & Web Services REST, GraphQL, SOAP, Swagger, Postman, WebSocket, Axios Cloud Platforms AWS (EC2, S3, Lambda, RDS, SQS, SNS, IAM, CloudWatch, DynamoDB, SES, API Gateway, Route 53, CloudFront), OpenStack Infrastructure as Code Terraform, AWS CloudFormation, Helm Charts Containerization & Orchestration Docker, Docker Compose, Kubernetes, OpenShift CI/CD & DevOps Jenkins, CircleCI, GitHub Actions, Puppet, Chef, Ansible, GitFlow Databases PostgreSQL, MySQL, Oracle, MongoDB, Cassandra, DynamoDB Messaging Systems Apache Kafka, RabbitMQ, ActiveMQ, IBM MQ Security OAuth 2.0, JWT, TLS/SSL, Spring Security, HashiCorp Vault, AWS Secrets Manager, Spring Cloud Vault PROFESSIONAL EXPERIENCE Tech finite Systems June 2024 Present Role: Full Stack Java Developer RESPOSIBILITIES: Developed dental billing logic using Java 17 advanced features including Streams, Lambda expressions, Optional, and enhanced String methods to calculate procedure costs and apply insurance adjustments accurately. Developed robust REST APIs using Spring Boot, Hibernate ORM, Spring Data JPA, and Spring MVC to manage patient records synchronize clinic data, and streamline integration between billing modules and third-party systems. Automated PDF invoice generation for dental services with Spring MVC, tracking payment status, and managed entities with Spring Core and PostgreSQL using a session-per-request pattern and Map Struct for DTO mapping. Optimized high-concurrency billing with Spring AOP, Log4j, and a cached thread pool, validated clinical workflows using Cucumber and JUnit monitored system health with Prometheus. Built a treatment progress dashboard using Angular 15, enabling real-time updates with NgRx and RxJS for accurate tracking. Optimized performance by implementing Virtual Scrolling to handle extensive patient histories efficiently. Developed reusable forms for updating patient records, ensuring robust validation through Angular Material UI, Reactive Forms, and custom Pipes, Directives enhancing usability during high-traffic periods. Secured real-time patient data workflows, restricting unauthorized access with Route Guards and promoting modularity via Standalone Components, allowing doctors to review and approve payment plans dynamically. Enhanced the platform's UI with AOT compilation, reducing load times and ensuring cross-browser compatibility with WebSocket API for live updates and lazy loading techniques for faster navigation. Ensured reliability through comprehensive testing, validating core functionalities with Jasmine and Karma, and verifying end-to-end workflows with Cypress, leading to seamless patient record management. Automated AWS infrastructure for the Patient Billing and Insurance Claims System using Terraform, managing EC2, S3, and EKS resources for secure, scalable, and reliable operations. Enforced HIPAA-compliant security measures with AWS IAM for granular access control and KMS for encryption of sensitive patient billing data stored in S3 and transmitted via API Gateway. Developed infrastructure as code (IaC) using AWS Terraform to deploy and manage a scalable and resilient architecture for the billing platform, ensuring real-time monitoring and efficient resource allocation. Implemented infrastructure as code using AWS CloudFormation and Terraform to automate the deployment and management of cloud resources, improving efficiency and reducing the risk of manual errors. Designed efficient PostgreSQL database schemas and wrote optimized SQL queries following FHIR standards, enabling seamless data integration across healthcare applications. Optimized MongoDB performance by implementing sharding, compound indexing, and aggregation pipelines to handle large-scale patient records efficiently, ensuring low-latency queries and fault tolerance in a distributed healthcare system. Containerized microservices using Docker multi-stage builds, minimizing image sizes and improving deployment efficiency while maintaining consistency across development, staging, and production environments. Deployed containerized applications on Kubernetes clusters, leveraging Helm charts for configuration management and StatefulSets for reliable storage, ensuring high availability and automated scaling of services during high traffic loads. Integrated Redis for efficient distributed caching of patient billing data, while employing Elasticsearch to enhance log analysis and monitoring of claims workflows. Performed comprehensive unit testing using JUnit and Mockito frameworks, thoroughly validating billing logic to ensure application reliability and ongoing compliance with HIPAA standards. Secured healthcare billing systems by conducting vulnerability assessments with SonarQube and OWASP ZAP, proactively identifying and mitigating potential security threats. Tech Stack: Java 17, Spring Boot, Hibernate ORM, Spring Data JPA, REST APIs, OAuth 2.0, JWT, RabbitMQ, PostgreSQL, AWS (EC2, S3, EKS, Lambda, API Gateway), Docker, Kubernetes, Angular, Rest API, RxJS, Jest, Cypress, Redis, Elasticsearch, Log4j, Splunk, Prometheus, Terraform, Jenkins, GitFlow, CI/CD Pipelines Agilysys Pvt Tech (Chennai, India) Mar 2020 Dec 2022 Client: Eatec, Role: Full Stack Java Developer RESPOSIBILITIES: Automated transaction reconciliation using Spring WebFlux, leveraging its backpressure capabilities for non-blocking processing during peak loads such as holiday seasons. Applied design patterns like DAO, Factory, and Singleton for clean architecture. performed comprehensive testing using JUnit and Mockito to validate application logic, while leveraging JMeter to assess performance under load. Simplified digital wallet logic using Java 11 Records, Sealed Classes, and Pattern Matching, reducing boilerplate code and enhancing maintainability for secure, scalable banking systems. Developed microservices using Spring Boot, Spring JPA, and REST APIs to process credit and debit card transactions, integrated Spring Batch for batch processing, and utilized Apache Kafka for real-time payment notifications. Ensured secure payment transactions using TLS/SSL certificates, implemented OAuth 2.0 and JWT for authentication, and optimized data handling with Spring Boot and Hibernate to enhance performance and compliance. Enhanced wallet UI performance with Code Splitting, Suspense for lazy loading, and WebSocket API for live updates. Ensured accessibility compliance optimized caching strategies. Conducted comprehensive testing using Jest for unit tests, React Testing Library for component validation, and Cypress for end-to-end scenarios to ensure seamless payment workflows and system reliability. Built RESTful APIs for payment initiation and status tracking using Hibernate for ACID compliance. Integrated Kafka for real-time, fault-tolerant, scalable transaction processing in high-volume environments. Conducted vulnerability assessments using SonarQube for payment APIs and OWASP for penetration testing of wallet interfaces. Architected scalable payment microservices on Amazon EKS with EC2 for high-performance computing, enforcing IAM for secure financial data. Ensured reliable payments with SQS FIFO queues for ordering, deduplication, SNS filtering for targeted notifications, and DLQs to prevent data loss during peak loads. Secured APIs with AWS API Gateway and real-time monitoring via CloudWatch, while AWS Lambda enabled cost-efficient auto-scaling for peak payment loads. Automated CI/CD pipelines for wallet microservices using Jenkins, CircleCI, GitFlow, and Puppet ensuring zero-downtime deployments during financial calendar peaks. Deployed microservices-based applications on OpenShift using Docker containers, leveraging Kubernetes Operators for automated scaling and simplified management of containerized workloads. Designed PostgreSQL schemas for transaction auditing with JPA/Hibernate, implemented row-level security to protect sensitive data, with composite indexing and partitioning for high performance and scalability. Orchestrated seamless integration of GraphQL APIs using Apollo Client's declarative data fetching for secure, fault-tolerant communication with backend services. Automated API testing with Postman, validating banking sandbox integrations and implemented Defined API specifications with Swagger for clarity and seamless integration. Implemented centralized logging for payment workflows using Log4j, with Grafana dashboards tracking failed transaction patterns, integrated real-time alerting for anomaly detection and log aggregation for streamlined troubleshooting. Used Maven as a build automation tool and managed Continuous Integration (CI) and Continuous Delivery (CD) processes ensuring seamless collaboration and efficient release cycles. Tech Stack: Java 11, Spring Boot, Hibernate, REST APIs, OAuth 2.0, JWT, Spring Security, Apache Kafka, PostgreSQL, MongoDB, AWS (EC2, S3, Lambda), Docker, Kubernetes, React, TypeScript, RxJS, NgRx, JUnit, Mockito, Cypress, Maven, Git, CI/CD Pipelines, Puppet Agilysys Pvt Tech (Chennai, India) Jun 2019 - Mar 2020 Client: Data Magine, Role: Full Stack Java Developer RESPOSIBILITIES: Developed RESTful APIs using Spring MVC and Hibernate ORM, managing real-time inventory updates and payment processes while utilizing Java 11 features like Lambdas and Streams for optimized performance. Utilized Spring Core with Dependency Injection to streamline database operations, integrating Spring Data JPA and Hibernate caching to efficiently handle high-concurrency transactions. Secured payment processing workflows through Spring Security, implementing JWT authentication and enforcing role-based access control to protect sensitive user and transaction data. Built a real-time interactive balance tracker application using Angular, TypeScript, Material UI, and HTML/CSS, providing live wallet updates and intuitive transaction history visualization. Developed responsive inventory management UIs using Angular Drag and Drop, providing intuitive item categorization with adaptive styling via SCSS. Automated UI testing using Jasmine, Karma, and Cypress to ensure smooth user interactions and compliance with accessibility standards. Designed adaptive user interfaces featuring lazy loading of modules and multilingual support via ngx-translate, enhancing application accessibility for global audiences. Created unit and integration tests using JUnit and Mockito, and validated API contracts with Postman for seamless backend integrations. Integrated Kafka to enable event-driven architecture, improve load balancing, and ensure scalable real-time system communication. Configured Hibernate sessions and implemented session-per-request patterns to efficiently manage database connections and transactions. Developed BDD test scenarios using Cucumber and integrated them into Jenkins pipelines for continuous testing and quality assurance. Used Splunk for monitoring logs, performance data, and errors to effectively troubleshoot and maintain application stability. Tech Stack: Java 11/8, Spring MVC, Hibernate ORM, REST APIs, OAuth 2.0, JWT, Spring Security, MySQL, Apache Kafka, AWS (EC2, S3, Lambda), Docker, Kubernetes, Angular, TypeScript, NgRx, GraphQL, JUnit, Mockito, Cypress, Maven, Git, CI/CD Pipelines EDUCATION: - Master of Science in Computer Science Southeast Missouri State University Cape Girardeau, MO May 2024 Sathyabama university B.E Keywords: continuous integration continuous deployment quality analyst user interface message queue javascript sthree procedural language Missouri