Thomas Yu
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Thomas Yu Email & Phone Number

Java Developer at Visa
Location: United States 3 work roles 2 schools
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Current company
Role
Java Developer
Location
United States
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Thomas Yu is listed as Java Developer at Visa, a with 18421 employees, based in United States. AeroLeads shows a matched LinkedIn profile for Thomas Yu.

Thomas Yu previously worked as Java Software Developer at Cisco and Java Software Developer at Gap. Thomas Yu holds Master Of Science - Ms, Computer Science from San Francisco State University.

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Visa

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About Thomas Yu

I am a Java Developer at Visa, where I leverage my skills and knowledge in Java, Kafka, AWS, and other technologies to build scalable and reliable applications. I have been working at Amazon since August 2021, after graduating with a Master of Science in Computer Science from San Francisco State University. At Amazon, I have extensively utilized the Observables to handle the asynchronous events in the application, set up automated CI/CD pipelines for Java applications on GCP using tools like Cloud Build and Jenkins, and utilized job scheduler Appworx to schedule the calls to third party API and oracle database function, stored procedure calls. I have also demonstrated expertise in developing EJB components to build distributed Java applications with a focus on modularity and reusability, and in comprehensive testing of middleware components, encompassing unit testing, integration testing, and stress testing to guarantee reliability. Additionally, I have integrated Informatica PowerCenter, a data integration tool, with Java applications to perform data extraction, transformation, and loading. I am passionate about learning new technologies and frameworks, and applying them to solve real-world problems. I am also a Certified ScrumMaster, and I actively participate in daily stand-up meetings and contribute to agile project management processes. I value collaboration, communication, and feedback, and I strive to deliver high-quality software solutions that meet the needs and expectations of users and clients.

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Visa
Visa
Java Developer
foster city, california, united states
Website
Employees
18421
AeroLeads page
3 roles

Thomas Yu work experience

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Java Developer

Current

Foster City, California, United States

Designed and implemented multiple enterprise-level REST Microservice applications for EC2 group using Spring Boot. Implemented Web application using Angular 8, HTML5, CSS3, TypeScript, Bootstrap and SASS.Implemented Reactive Form, Template-driven Form, Data Binding, Component Communication, Custom Pipe, Router Guards, and multiple Service layers in Angular 8.Implemented the Lazy-Loading feature using Angular to improve the overall responsiveness of the frontend web page.Tested the new features in the frontend using Jasmine and Karma.Implemented the asynchronous design using Observable in Angular 8 to connect the frontend and backend.Involved in the Analysis, Design and implementation using [AGILE] methodology for iterative development of the application. Participated in Scrum, Retrospective and Release Planning Meetings.Created AWS Code Pipeline by building the app on AWS Code Build, deployed & maintained by Elastic Beanstalk. Improved the efficiency of the application pipeline performance by 70%.Developed application using Spring, Hibernate, Web Services (RESTFUL).Worked on Spring Controllers and configured using annotations to handle the presentation requests and integrated with services and DAO using annotation.Involved in Design and Development using OOAD methodology to capture and model business requirements, developing multi-threaded high-performance applications server-side workflow.Implemented Multithreading, Concurrency, Exception Handling, and Collections as necessary.Involved in scrum and sprint planning meeting to discuss user stories with concept owners and subject matter experts.Implemented OAuth 2.0 authorization framework to get access to a protected resource on behalf of a resource owner (usually an end user).Developed expertise in optimizing application performance through the effective use of L1 and L2 cache mechanisms, enhancing data retrieval speeds and system efficiency.

Mar 2022 - Present

Java Software Developer

San Jose, California, United States

The project is to upgrade the stuff management system including time and attendance tracking, scheduling, notification, absence management, compliance and migration from monolith to micro-services.Supervising development cycles and managing business expectations for the project with Agile approach.Developed the whole RESTful API with Spring Boot and Spring MVC framework and did integration to Spring Cloud Microservices into existing system architecture for service registration and discovery.Integrated Shiro and JWT to develop the login system based on the RBAC model, introduced Redis with AOP and ThreadLocal to handle the token expiration problem.Designed and implemented UI using ReactJS, along with HTML 5, CSS 3, grabhql for the dynamic and static webpage.Configured AWS Lambda with Python in response to triggers data changes and user actions, which is used for real-time serverless data processing system.Wrote SQL queries, used MyBatis to connect to MySQL database for larger data manipulation.Leveraged multi-threads in messaging module to send cached announcement messages to RabbitMQ, applied MongoDB to store messages to reduce system pressure.Implement Jenkins for CI/DI Agile development, used Git for version control. Involved in Unit & Integration Testing for different Modules in the application.Wrote build & deployment scripts based on Docker and AWS Services like EC2, RDS, DynamoDB, and S3.Supported the application in Production 24X& environment

Jan 2020 - Feb 2022

Java Software Developer

Gap

San Francisco, California, United States

Led the development of the search engine for ERP to search personalized resources and get recommendations.Worked on designing the tiers of the applications and implementation with J2EE best design practices. Used Spring Boot and Spring MVC as application development framework for RESTful API.Built Oracle database to store large amounts of the data and using Hibernate for back-end development.Designing message streams using OSS, Oracle Adaption of Kafka, for users’ and dev teams’ consumption. Involved in Design and Development using OOAD methodology to capture and model business requirements, developing multi-threaded high-performance applications server-side workflow.Introduced Elasticsearch with analyzer and semantic extension to optimize searching performance, introduced Logstash and Canal to achieve full indexing and incremental indexing.Collaborating with machine learning group to implementing a Spark application running on Oracle Dataflow to process and validate user input data.Track the entire developing process with JIRA.

Jun 2017 - Dec 2019
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2 education records

Thomas Yu education

FAQ

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What company does Thomas Yu work for?

Thomas Yu works for Visa.

What is Thomas Yu's role at Visa?

Thomas Yu is listed as Java Developer at Visa.

Where is Thomas Yu based?

Thomas Yu is based in United States while working with Visa.

What companies has Thomas Yu worked for?

Thomas Yu has worked for Visa, Cisco, and Gap.

Who are Thomas Yu's colleagues at Visa?

Thomas Yu's colleagues at Visa include Rachel Yip, Vakis Graffity, Lauren Rhodes, Anvardeen Rashiah, and Benedicta Okereke.

How can I contact Thomas Yu?

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What schools did Thomas Yu attend?

Thomas Yu holds Master Of Science - Ms, Computer Science from San Francisco State University.

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