Jason Chen
Toronto
Summary
Logical and results-driven Web Developer dedicated to building and optimizing user-focused websites for customers with various business objectives. Judicious and creative when crafting effective websites, apps and platforms to propel competitive advantage and revenue growth. Technically proficient and analytical problem solver with calm and focused demeanor.
Overview
9
9
years of professional experience
Work History
Senior ReactJS Developer
Decormatters,Inc
02.2021 - 08.2024
- Developed a high-performance, customer-facing e-commerce application using ReactJS, Redux-saga, React Hooks, React-Router, JavaScript, HTML5, CSS3, SASS, and Bootstrap4, resulting in a 25% increase in user engagement and a 15% reduction in page load time.
- Built a comprehensive UX library consisting of 12 custom components (Accordion, Filters, Dropdown, Carousel, Button, Checkbox, Input, Icons), leading to a 10% improvement in user experience feedback.
- Maintained high-level expertise in React state management strategies, including Redux, Redux Persist, and redux-saga, achieving a 95% reduction in application bugs through optimized state management.
- Exclusively utilized React Hooks to handle application lifecycle processes, resulting in a 20% decrease in development time and a 10% increase in code efficiency.
- Implemented a comprehensive Test-Driven Development (TDD) approach using Jest and Enzyme for React, achieving 99% test coverage and ensuring code quality.
- Collaborated closely with clients to establish specifications and system designs, leveraging tools like Zeplin and InVision to achieve a 95% client satisfaction rate with the final product.
- Utilized middleware and Redux-Saga with ImmutableJS to efficiently handle data retrieval, storage, and RESTful API interactions, resulting in a 50% reduction in API call latency and 30% increase in data processing speed.
- Optimized SEO and ensured ADA compliance through effective use of native HTML elements, custom tags, and CSS Box Model techniques, achieving a 20% increase in organic search traffic and 100% ADA compliance for the application.
- Leveraged SASS preprocessor for efficient styling, incorporating mixins, functions, custom grid systems, grid-area concepts, and flexbox to create fluid and responsive designs, resulting in a 15% improvement in mobile responsiveness and a 5% increase in overall website performance.
- Utilized GitLab for version control and JIRA for project tracking, contributing to a collaborative and Agile development environment, leading to a 20% reduction in development cycle time and 10% improvement in team productivity.
Senior Web Developer
Enplug
03.2018 - 01.2021
- Designed and developed web pages using HTML5, CSS3, JavaScript, Bootstrap, SASS, LESS, ReactJS, Redux, Flex, and MongoDB, resulting in a 20% increase in website load speed and a 15% improvement in user engagement.
- Extensively utilized ReactJS components, Forms, React-Bootstrap, Events, Keys, Router, Animations, Redux, and Flux concepts, leading to a 30% reduction in development time and a 10% increase in code reusability.
- Experienced in all phases of the SDLC (Requirement Analysis, Implementation, and Maintenance), with extensive experience in Agile and SCRUM methodologies, achieving a 95% on-time delivery rate and a 10% improvement in team collaboration.
- Leveraged Object-Oriented Programming concepts to develop UI components and successfully reused them across 5 different web applications, resulting in a 25% reduction in development effort and a 10% increase in code consistency.
- Developed custom map components using Google APIs to visualize and manage lot devices, leading to a 15% improvement in operational efficiency and a 10% reduction in device management time.
- Created a single ISOMORPHIC responsive website, accessible across desktop, tablets, and mobile users using ReactJS, achieving a 98% user satisfaction rating and a 10% increase in mobile conversion rates.
- Expertise in UX-Library comprised of 10+ custom components (Button, Checkbox, Input, Icons, Toggle Button, Dropdown, Multi-Level Dropdown, etc.), contributing to a 15% improvement in user experience and a 5% increase in user satisfaction.
- Collaborated closely with the Back-End team to display data using custom components, library components, and Redux, achieving a 90% accuracy rate in data visualization and a 10% increase in data integration efficiency.
- Configured automation pipelines using Jenkins to monitor the CI/CD process, resulting in a 20% reduction in deployment time and a 10% increase in code stability.
- Proficient in using testing frameworks like Jasmine, Karma, Protractor, and Mocha test runners, achieving 98% test coverage and ensuring code quality.
- Followed Agile principles and used JIRA as a bug tracking tool to identify and monitor progress, leading to a 15% reduction in bug resolution time and a 10% increase in team productivity.
Senior Web Developer
Blitz GG Los Angeles
08.2015 - 02.2018
- Developed 3 working prototypes for IoT smart cities and smart agriculture projects within 6 months, demonstrating a strong ability to translate concepts into functional solutions.
- Proficiently built websites adhering to Web 2.0 industry standards using HTML5, CSS3, SASS, JavaScript, and ReactJS, resulting in a 15% increase in website performance and a 10% improvement in user experience.
- Exclusively used NodeJS for building fast and scalable network applications, leveraging ExpressJS as the standard server framework, achieving a 30% reduction in server response time and a 15% increase in application scalability.
- Adopted NPM, Gulp, and Grunt as task managers, automating build processes and achieving a 25% reduction in build time and a 10% increase in build consistency.
- Demonstrated a deep understanding of ThingSpace platform architecture, including database, API, caching layer, proxies, and web services, contributing to a 95% success rate in integrating various components and ensuring seamless operation.
- Extensively utilized GitHub and Source Tree for distributed version control and source code management (SCM), resulting in a 90% reduction in code conflicts and a 10% increase in code collaboration.
- Mapped user journey end-to-end, from sensor-based SOAP-API to Mongo DB, covering all data phases using information architecture diagrams and user flows, leading to a 10% improvement in system design clarity and a 5% reduction in development errors.
- Worked closely with the backend team to ensure smooth deployments, configuring different builds and test scripts for the CI/CD process, achieving a 90% on-time deployment rate and a 10% increase in deployment efficiency.
- Exclusively implemented a NodeJS wrapper around SCALA microservices and exposed a Swagger-UI for stakeholder showcases, resulting in a 15% increase in API documentation clarity and a 5% improvement in stakeholder understanding.
- Executed FireBase to handle incoming dynamic data from the ThingSpace Gateway, adhering to Threeway-Data-Binding practices, achieving a 95% accuracy rate in data handling and a 10% increase in data synchronization speed.
- Performed extensive unit tests using Mocha and e2e test suites for all components, running them with Protractor, achieving 98% test coverage and ensuring code quality.
- Utilized Google Analytics to capture user metrics and improve the customer experience with digital analytics, resulting in a 10% increase in user engagement and a 5% improvement in website conversion rates.
- Implemented Istanbul, a popular code coverage tool, to increase code coverage and make code more production-efficient, achieving a 15% increase in code coverage and a 5% reduction in production bugs.
Education
Bachelor of Science - Engineering Management
California State University
Northridge, CA05.2014
Skills
- HTML/HTML5, CSS/CSS3, Bootstrap4, SASS
- JavaScript, Typescript
- ReactJS, NextJS
- Selenium, Protractor, Mocha, Jest, Enzyme
- WebPack, NPM, Gulp, Grunt, Gradle, Maven Docker, AWS
- Cassandra, MongoDB, PostgreSQL
- NodeJS, jQuery, AJAX, JSON
- Jenkins
- Sitebulb
- Redux-saga, React Hooks, ImmutableJS
- GitHub, GitLab, Bit Bucket, Source Tree
- Agile Methodologies, JIRA, Confluence
Timeline
Senior ReactJS Developer
Decormatters,Inc
02.2021 - 08.2024
Senior Web Developer
Enplug
03.2018 - 01.2021
Senior Web Developer
Blitz GG Los Angeles
08.2015 - 02.2018
Bachelor of Science - Engineering Management
California State University
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