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I'm a Senior Front-End Developer with 9+ years of experience building performant, accessible, and scalable web applications. I excel in React, Vue, Angular, and modern JavaScript (ES6+), and I love turning UX concepts into reusable UI components that power delightful user experiences. I collaborate closely with design, product, and backend teams to ship cloud-ready interfaces. I focus on front-end performance tuning, Core Web Vitals, and automated testing, and I enjoy evolving architecture with scalable CSS, component-driven development, and a strong emphasis on accessibility.…I'm a Senior Front-End Developer with 9+ years of experience building performant, accessible, and scalable web applications. I excel in React, Vue, Angular, and modern JavaScript (ES6+), and I love turning UX concepts into reusable UI components that power delightful user experiences. I collaborate closely with design, product, and backend teams to ship cloud-ready interfaces. I focus on front-end performance tuning, Core Web Vitals, and automated testing, and I enjoy evolving architecture with scalable CSS, component-driven development, and a strong emphasis on accessibility.

Darren Ching-Yen Chan

Full Stack Developer, Front-End Developer, Back-End Developer, +3

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I'm a Senior Front-End Developer with 9+ years of experience building performant, accessible, and scalable web applications. I excel in React, Vue, Angular, and modern JavaScript (ES6+), and I love turning UX concepts into reusable UI components that power delightful user experiences. I collaborate closely with design, product, and backend teams to ship cloud-ready interfaces. I focus on front-end performance tuning, Core Web Vitals, and automated testing, and I enjoy evolving architecture with scalable CSS, component-driven development, and a strong emphasis on accessibility.…I'm a Senior Front-End Developer with 9+ years of experience building performant, accessible, and scalable web applications. I excel in React, Vue, Angular, and modern JavaScript (ES6+), and I love turning UX concepts into reusable UI components that power delightful user experiences. I collaborate closely with design, product, and backend teams to ship cloud-ready interfaces. I focus on front-end performance tuning, Core Web Vitals, and automated testing, and I enjoy evolving architecture with scalable CSS, component-driven development, and a strong emphasis on accessibility.

Available to hire

I’m a Senior Front-End Developer with 9+ years of experience building performant, accessible, and scalable web applications. I excel in React, Vue, Angular, and modern JavaScript (ES6+), and I love turning UX concepts into reusable UI components that power delightful user experiences.

I collaborate closely with design, product, and backend teams to ship cloud-ready interfaces. I focus on front-end performance tuning, Core Web Vitals, and automated testing, and I enjoy evolving architecture with scalable CSS, component-driven development, and a strong emphasis on accessibility.

Skills

Experience Level

Expert

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Intermediate

Language

English

Fluent

Work Experience

Software Engineer at Stealth Startup

October 1, 2025 - October 1, 2025

Built large-scale applications using Node.js, Express, React/Redux, and GraphQL, translating complex business requirements into scalable solutions. Designed microservices deployed on Kubernetes, enabling seamless scalability from 100K to 1M+ monthly users with 99.98% uptime. Built a real-time analytics dashboard on AWS using Lambda, Kinesis, and S3, accelerating decision-making by 85%. Improved performance by optimizing PostgreSQL queries and implementing Redis caching, reducing API latency by 50-60%. Migrated monolithic applications to a Docker + Spring Boot containerized stack, reducing deployment times from hours to minutes. Implemented OAuth2 and JWT authentication with API Gateway authorizers, strengthening security across microservices. Modernized UI using Angular, Vue.js, and Material Design, improving accessibility and user engagement. Led a team of 10 engineers to deliver new e-commerce features using Vue.js and ASP.NET Core, increasing conversions by 30%. Implemented CI/CD pi

Backend Engineer at Wellth

August 1, 2025 - August 1, 2025

Built performant applications using Node.js, React, Styled Components, and TypeScript. Designed a Django + PostgreSQL API platform handling 500K+ daily requests under 300ms. Implemented Kafka-based real-time pipelines supporting analytics and cross-team data visibility. Developed React + Express apps for major feature rollouts and product improvements. Led the transition to a microservices architecture using Spring Boot and Docker to improve modularity. Built an advanced analytics dashboard using D3.js, React, and Gridstack for rich visualization. Implemented GitHub Actions + Jenkins CI/CD pipelines for automated testing and deployments. Architected cloud-native deployments on Azure using AKS and App Gateway, reducing cloud spending by $300K annually. Enforced robust testing practices using Jest, Mocha, Chai, and JMeter for load testing. Promoted secure coding standards, OWASP compliance, and strong API-level security.

Full Stack Developer at Unstoppable Domains

October 1, 2023 - October 1, 2023

Built PopCapacity, a warehouse management system using the MEAN stack. Developed Green Rabbit, an NFT-powered blockchain game running on the WAX network. Designed AWS-based microservices using ECS, Lambda, and DynamoDB, improving scalability and cutting server costs by 50%. Contributed unit tests (Jest, NUnit) and end-to-end tests using Cypress, reducing production bugs by 25%.

Software Engineer at OCTI, INC

October 1, 2022 - October 1, 2022

Developed front-end features using React, TypeScript, and Express.js for major product enhancements. Integrated Angular components with Express microservices for cohesive user experiences. Built RESTful services with Node.js and optimized performance by 30% via DB tuning. Implemented external APIs, search features, Stripe/PayPal payments, and auto-generated reporting tools. Partnered with UX teams to build SEO-optimized, fast-loading interfaces scoring high on Lighthouse. Monitored applications using Azure Monitor and App Insights, resolving incidents within SLA. Automated deployments using CI/CD pipelines and Docker, reducing deployment times by 70%.

Software Engineer at Age of Learning, Inc

September 1, 2020 - September 1, 2020

Developed full-stack apps with Node.js, Express.js, React, and PostgreSQL for internal tools. Designed GraphQL schemas and queries to support scalable microservices. Built micro-frontend apps using React, TypeScript, Recoil, and Redux-Saga. Created UI components with Material-UI, ensuring design system consistency. Migrated legacy systems to microservices, improving performance by 60%. Debugged cross-browser issues and optimized rendering reliability.

Software Engineer at JNR Incorporated

April 1, 2019 - April 1, 2019

Built internal apps with Node.js, Express, React, and PostgreSQL. Developed GraphQL schemas and query layers. Built small front-end apps with React, TypeScript, Recoil, and Redux-Saga. Created responsive UI components with Material-UI. Helped migrate legacy systems to microservices. Debugged browser compatibility issues.

Senior Software Engineer at Stealth Startup

October 1, 2025 - October 1, 2025

Led front-end development for a 10-engineer team; built complex front-end apps using React/Redux, Vue.js, and GraphQL; designed a modular component library aligned with WCAG AA; improved performance with Lighthouse and Web Vitals; built real-time dashboards using React and WebSockets; contributed to micro-frontend integration via Module Federation; optimized client-side data hydration with Redis; modernized UIs with Angular and Material; established automated testing with Jest, RTL, and Cypress; created CI pipelines with GitHub Actions for visual regression testing.

Senior FullStack Developer (Frontend-Focus) at Wellth

August 1, 2025 - August 1, 2025

Delivered production-ready React + TypeScript front-end features with Styled Components; created a unified UI component library with Storybook; built complex data visualizations with D3.js; implemented Redux Toolkit and React Query; introduced responsive design standards and axe-core accessibility checks; set up end-to-end tests with Cypress and Playwright; built Azure-based front-end deployment pipelines with GitHub Actions.

Junior Full Stack Developer (Frontend -Leaning) at Unstoppable Domains

October 1, 2023 - October 1, 2023

Implemented high-quality front-end features using the MEAN stack; built interactive Web3 dashboards and NFT interfaces with React and TypeScript; designed reusable UI modules with Angular and Material; strengthened tests with Jest and Cypress.

Junior Full-Stack Developer at OCTI, INC

October 1, 2022 - October 1, 2022

Built major front-end features with React, TypeScript, and modular CSS; optimized rendering via memoization, virtualization, and selective hydration; integrated Angular components into React/Express during a platform transition; collaborated with UX to deliver pixel-perfect UI and top Lighthouse accessibility scores; automated deployments with Docker and CI pipelines.

Junior Frontend Developer at Age of Learning, Inc

September 1, 2020 - September 1, 2020

Built internal tools and micro-frontends using React, TypeScript, Recoil, and Redux-Saga; designed complex UI flows with portals and custom hooks; developed GraphQL-based client schemas; performed cross-browser testing and hydration fixes; migrated legacy UIs to modular micro-frontend architecture, improving load times.

Intern Developer at JNR Incorporated

April 1, 2019 - April 1, 2019

Built responsive front-end applications with React, TypeScript, and Material-UI; designed GraphQL query layers; created reusable UI components and dashboards for internal tools; improved browser compatibility and eliminated rendering inconsistencies across devices.