Andrew Chang Email & Phone Number

Migrated applications to AWS Cloud, increasing maintainability and scalability.Upgraded core technologies like Elasticsearch and Spring Boot to the latest stable versions along with Java 17, enhancing performance.Boosted application speed by adopting Java Quarkus and Golang Gin/Gonic frameworks, reducing response times by over 25%.Minimized service latency and increased overall throughput between services on different cloud environments, enhancing performance.Implemented robust… Show more Migrated applications to AWS Cloud, increasing maintainability and scalability.Upgraded core technologies like Elasticsearch and Spring Boot to the latest stable versions along with Java 17, enhancing performance.Boosted application speed by adopting Java Quarkus and Golang Gin/Gonic frameworks, reducing response times by over 25%.Minimized service latency and increased overall throughput between services on different cloud environments, enhancing performance.Implemented robust security and monitoring solutions using Dynatrace and Snowflake, cutting incident response and resolution times by 50%.Managed Kafka offsets, preventing 99% of potential consumer failures like duplicate reads and message losses.Scripted Terraform as IaC for deploying applications to AWS Cloud and managed Helm files to maintain legacy applications.Updated Confluence pages and Swagger documentation, increasing team productivity by 20%.Stayed updated with the latest cybersecurity trends and best practices, implementing necessary security measures to safeguard sensitive data.Diagnosed core issues as the subject matter expert for ingestion services.Collaborated in a highly engaged Agile environment. Show less

Redesigned system architecture by participating in the full software development life cycle, adopting a hybrid orchestration-choreography microservices model, improving system throughput by 35%.Experienced web and mobile user interface design with React, Redux, React Hooks with Tailwind CSS in highly collaborative Agile team environment.Mentored junior developers and fostered a collaborative team environment.Spearheaded the creation of orchestrators and downstream microservices… Show more Redesigned system architecture by participating in the full software development life cycle, adopting a hybrid orchestration-choreography microservices model, improving system throughput by 35%.Experienced web and mobile user interface design with React, Redux, React Hooks with Tailwind CSS in highly collaborative Agile team environment.Mentored junior developers and fostered a collaborative team environment.Spearheaded the creation of orchestrators and downstream microservices using Java Spring Boot and Golang Gin/gonic, achieving 99.9% system uptime.Leveraged Java 8 and 11 core features like lambdas, stream APIs, and collections to simplify the codebase and improve accuracy.Maintained OpenAPI Swagger documentation and Postman collections, reducing frontend teams' dependency on our team.Produced well-designed, clear code and wrote test cases to achieve more than 80% line coverage in SonarQube Testing.Facilitated code reviews, enhancing code quality and reducing bugs.Wrote comprehensive unit tests with JUnit, Jest and Mocha to guarantee code functionality and catch regressions during development following TDD methodolog.Innovated new solutions through POCs, accelerating feature development and ensuring design correctness.Resolved incidents in close collaboration with clients. Show less

Denver, Colorado, United States

Developed and maintained a single-page application (SPA) using Angular, React/Next with PrimeReact, emphasizing clean code principles and modular design.Optimized front-end performance for a high-traffic e-commerce website using techniques like code splitting, lazy loading, and image optimization, also optimized application backend performance using advanced algorithms, leading to a 20% increase in efficiency for specific modules.Refined the codebase written in Spring Framework and… Show more Developed and maintained a single-page application (SPA) using Angular, React/Next with PrimeReact, emphasizing clean code principles and modular design.Optimized front-end performance for a high-traffic e-commerce website using techniques like code splitting, lazy loading, and image optimization, also optimized application backend performance using advanced algorithms, leading to a 20% increase in efficiency for specific modules.Refined the codebase written in Spring Framework and Spring Boot, simplifying complexity and improving maintainability through recursive approaches.Transitioned several microservices to AWS Lambda, optimizing operational costs by 50%.Strengthened application security by conducting security best practices, reducing vulnerabilities by 30%.Constructed comprehensive test suites, including unit and integration tests using JUnit and Mockito, significantly lowering production defects.Contributed to the team by enhancing performance with a good understanding of data structures and algorithms. Show less

Omaha, Nebraska, United States

Crafted HTML templates that adhered to modern design principles using HTML, CSS, SCSS, and JavaScript, converting from UI/UX Figma designs.Developed and implemented a modern web application leveraging Oracle, Spring MVC, React.js, Hibernate, also developed internal monitoring tools, reducing application downtime and developer effort by eliminating certain dependencies on DBAs.Led the transition of client SFTP servers to Moveit Cloud, contributing to a 25% reduction in data center… Show more Crafted HTML templates that adhered to modern design principles using HTML, CSS, SCSS, and JavaScript, converting from UI/UX Figma designs.Developed and implemented a modern web application leveraging Oracle, Spring MVC, React.js, Hibernate, also developed internal monitoring tools, reducing application downtime and developer effort by eliminating certain dependencies on DBAs.Led the transition of client SFTP servers to Moveit Cloud, contributing to a 25% reduction in data center costs.Constructed several web applications and added endpoints with JSP and Spring Frameworks, handling both JSON and SOAP requests.Partnered with cross-functional teams to design, test, and deploy high-quality software solutions for clients.Tailored applications to meet client needs, increasing customer satisfaction.Oversaw both Maven and Gradle projects and gained experience with Cucumber for BDD development.Integrated OAuth2 and Okta SSO for secure and seamless user access, incorporating new technologies to enhance system capabilities and performance.Authored clear, concise code in Angular with Typescript(ES6) for enterprise applications.Migrated several applications from JSP and Spring Framework to Spring Boot, implementing security best practices that reduced incidents by up to 95%.Deployed anomaly detection systems using New Relic and a custom-built solution, cutting incident rates and response times by 80%.Engineered CI/CD pipelines with Docker and Jenkins, accelerating deployments by 70%.Collaborated closely with architects, developers, and business analysts to gather requirements, design solutions, and deliver high-quality software products with 100% project success rate.Demonstrated experience working with third-party developers to troubleshoot issues like 502 errors in GCP and SendGrid.Enhanced team performance by resolving incidents with exceptional problem-solving abilities and critical thinking skills. Show less