Jason Garcia Email & Phone Number

United States

Upgraded the application codebase to Java 17, leveraging new language features and APIs to improve code readability, maintainability, and performance.Developed the application built on Spring modules (Spring MVC 5.x, Spring Boot 2.6.x, Spring Cloud 2021.x, Spring Security 5.x, Spring Batch 4.x, and Spring Data JPA 2.6.x).Written multiple batch jobs using Spring Batch 4.x framework, configured with both annotation and XML-based configurations to support various business functionalities.Adopted Java 17's Foreign Function and Memory API (FFM) for efficient and safe interoperability with native code, optimizing system performance.Migrated the application code to use Java 17's new macOS rendering pipeline, improving graphical performance and compatibility on macOS platforms.Integrated Microservices with Hibernate ORM 5.6.x using Spring Boot, writing HQL queries for data access.Secured RESTful Web Services using Spring Security 5.x filters along with bearer token authentication using OAuth 2.0 tokens.Designed a Mailing System that gathers resources from various formats and uploads them to S3 buckets using AWS Lambda and Simple Email Service (SES).Created monitors, alarms, and notifications for EC2 hosts using AWS CloudWatch. Utilized CloudFormation 2.x and launch configurations for repeatable provisioning of AWS resources.Designed and optimized PostgreSQL 13.x/14.x databases, ensuring efficient data storage, retrieval, and performance tuning.Utilized Java 17's sealed classes to create well-defined and secure API boundaries, enhancing application security and design.Used AWS SNS/SQS/SES for implementing asynchronous workflows.Managed Amazon Web Services (AWS) such as EC2, S3, ELB, Auto-Scaling, AMI, and IAM through AWS Console and API Integration.Designed and optimized data models for MongoDB 4.x collections, ensuring optimal performance and storage utilization

United States

Developed REST APIs using Spring MVC 5.x and Spring Boot 2.3.x, hosted all Microservices on AWS to set up the application and configure environments.Worked on integration of Spring Modules (Spring Boot 2.3.x) with AWS Modules to consume third-party services.Created Amazon EC2 instances using Elastic Beanstalk and deployed the application on it.Developed RESTful Web Services with JAX-RS 2.x using Spring Boot 2.3.x and Microservices Architecture.Created Spring Batch jobs for reliability, robustness, essential automatic processing using Spring Batch 4.x.Developed backend REST API services using Java 8/11 on a microservice architecture system.Installed the application on AWS EC2 instances and configured the storage on S3 buckets.Created various AWS Lambda functions and API Gateways to submit data via API Gateway that is accessible via Lambda function.Used Spring Boot 2.3.x for modifying an application that transferred files from one server (source) to another server (sink) based on customer configurations.Used OAuth 2.0 authentication framework to secure RESTful web services by generating access tokens to access protected resources.Implemented the authentication, authorization, and access-control features using Spring Security 5.x.Developed Spring Controllers, Service Components, DAOs, Web Services, and UI Integration for processing billing and payment data.Managed PostgreSQL 12.x backup and recovery processes, including point-in-time recovery, to ensure data integrity and availability.Implemented indexing strategies and performed query optimization to enhance database performance, ensuring fast retrieval times and efficient use of resources.Used Spring JPA and Hibernate 5.x with entity beans for interacting with the persistence layer for CRUD operations.

United States

Designed and developed a Java Multi-Threading based collector parser and distributor process, handling data at a speed of thousands of messages per second.Implemented Design Patterns such as Command Pattern, Business Delegator, Service Locator, Business Objects, and Data Objects.Used Spring MVC 4.x framework to control the presentation, business, structural, and navigational aspects of the application.Developed controllers, interfaces, and implementation classes using the Spring MVC 4.x framework.Utilized Hibernate ORM along with the Spring framework for database operations.Developed POJO classes and wrote Hibernate Query Language (HQL) queries for database transactions.Mapped objects to the database using Hibernate ORM with HQL as the persistence framework.Developed and implemented DAO classes using Hibernate ORM for handling database transactions.Built scripts on AWS Cloud for scheduling EC2, Auto Scaling, and Load Balancer using the Java SDK.Worked with AWS S3 services, creating and configuring buckets with permissions, logging, versioning, and tagging.Used the AWS platform to upload data into S3 buckets and created EC2 instances for application deployment.Worked with AWS RDS to store and manage Spring Batch-related data and to handle Spring Batch jobs.Developed Action Classes to delegate requests to business models and Action Forms.Implemented Kafka-based event streaming to enable real-time data processing and analytics, improving system responsiveness and scalability.Made web service calls using SOAP and REST (using JAX-RS and JAX-WS frameworks).Troubleshot production incidents, analyzed issues, and provided fixes using Java tools like XSLT, SOAP, PL/SQL, and XML configurations.Worked on the implementation of JMS for asynchronous message exchange, using RabbitMQ as the message queue

United States

Responsible for planning, analysis, design, and deployment phases of the Software Development Life Cycle (SDLC) of application development using Agile Methodology.Utilized Java 8 Lambda expressions along with Streams to create internal iterations and perform chain operations such as Filter, Map, and Collect on a collection of objects.Implemented Singleton and Service Locator Design Patterns in the MVC framework and developed command, delegate, and model action script classes to interact with the backend.Executed JavaEE components using Spring MVC 4.x, Spring Core/IOC, Spring Transactions, and Spring Security modules.Implemented Spring MVC controllers, configured using annotations and configuration files.Introduced Spring AOP to the project modules to focus on business logic and manage cross-cutting concerns separately.Used Spring Security (JWT) to manage authentication and authorization for accessing resources.Developed RESTful Services and Web Service Clients (JAX-RS/JAX-WS) with data representation in XML and JSON formats.Leveraged AWS cloud services such as EC2, S3, RDS, and Lambda to build and deploy scalable and reliable applications.Provisioned, configured, and maintained AWS EC2 instances for running various applications and services, ensuring high availability and fault tolerance.Utilized AWS S3 for object storage solutions, implementing secure and efficient storage management and data retrieval strategies.Interacted with Java Controllers using JSON to write and read data from back-end systems.Implemented Web Services for internal and third-party application integration using SOAP and REST services with Apache CXF.Configured PostgreSQL replication and high availability solutions like streaming replication and failover mechanisms to ensure database resilience and uptime.Established database connectivity using JDBC and Hibernate O/R mapping with Spring ORM for Oracle databases