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Hi, I’m Jim Tseng, a frontend developer with 15+ years of experience building responsive, high-performance applications. I specialize in React, Next.js, and modern UI frameworks, with a strong focus on state management, backend integration, and collaborating with teams to deliver polished software. I’ve delivered pixel-perfect, accessible UIs for global brands and optimized performance across platforms. In recent roles, I’ve built reusable UI systems from design assets, partnered with international backend teams on API design, and driven testing and accessibility improvements to ensure reliable, inclusive products.…Hi, I’m Jim Tseng, a frontend developer with 15+ years of experience building responsive, high-performance applications. I specialize in React, Next.js, and modern UI frameworks, with a strong focus on state management, backend integration, and collaborating with teams to deliver polished software. I’ve delivered pixel-perfect, accessible UIs for global brands and optimized performance across platforms. In recent roles, I’ve built reusable UI systems from design assets, partnered with international backend teams on API design, and driven testing and accessibility improvements to ensure reliable, inclusive products.

Jim Tseng

Front-End Developer, Web Developer, Full Stack Developer, +5

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Hi, I’m Jim Tseng, a frontend developer with 15+ years of experience building responsive, high-performance applications. I specialize in React, Next.js, and modern UI frameworks, with a strong focus on state management, backend integration, and collaborating with teams to deliver polished software. I’ve delivered pixel-perfect, accessible UIs for global brands and optimized performance across platforms. In recent roles, I’ve built reusable UI systems from design assets, partnered with international backend teams on API design, and driven testing and accessibility improvements to ensure reliable, inclusive products.…Hi, I’m Jim Tseng, a frontend developer with 15+ years of experience building responsive, high-performance applications. I specialize in React, Next.js, and modern UI frameworks, with a strong focus on state management, backend integration, and collaborating with teams to deliver polished software. I’ve delivered pixel-perfect, accessible UIs for global brands and optimized performance across platforms. In recent roles, I’ve built reusable UI systems from design assets, partnered with international backend teams on API design, and driven testing and accessibility improvements to ensure reliable, inclusive products.

Available to hire

Hi, I’m Jim Tseng, a frontend developer with 15+ years of experience building responsive, high-performance applications. I specialize in React, Next.js, and modern UI frameworks, with a strong focus on state management, backend integration, and collaborating with teams to deliver polished software.

I’ve delivered pixel-perfect, accessible UIs for global brands and optimized performance across platforms. In recent roles, I’ve built reusable UI systems from design assets, partnered with international backend teams on API design, and driven testing and accessibility improvements to ensure reliable, inclusive products.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Front-End Developer at BlinkUX

October 1, 2023 - Present

Delivered enterprise-grade web apps for Morgan, Lewis & Bockius using ReactJS, Next.js 15, TypeScript, Zustand, Tailwind CSS, and Framer Motion; deployed ReactJS apps to Azure and Next.js apps to Vercel; built a reusable UI component system from Figma designs cutting feature build time by 30%; collaborated with designers in Figma and maintained project documentation in Notion; partnered with international backend teams to define RESTful API structures; maintained 70%+ unit test coverage using Jest and React Testing Library; optimized for WCAG 2.1 AA accessibility; developed Next.js integrations for AI-driven legal tools with OpenAI and LLaMA models.

Sr Frontend Developer II / Tech Lead at Nexient

October 1, 2021 - October 1, 2022

Led front-end development for e-commerce platforms, engineered scalable features using React, Next.js (SSR), TypeScript, Redux, and Zustand; improved page load speeds by up to 40%; guided UI/UX direction and implemented a component library; coordinated with backend engineers to optimize Node.js + Prisma + MongoDB APIs; mentored junior developers to improve code quality.

Frontend Web Engineer at CoStar Group

March 1, 2021 - October 1, 2021

Developed Battle of the Bids (BOB) — a React + TypeScript web app connected to the Ten-X API; translated complex Figma/InVision designs into pixel-perfect, mobile-responsive UIs; designed and integrated Express + Prisma APIs with MongoDB to support new features; produced clear technical documentation to streamline cross-team communication.

Senior Full-Stack Engineer at WAREDCLOUD CONSULTING

October 1, 2020 - February 1, 2021

Helped maintain client site (dreamdinners) with classic PHP and MySQL; used PHP to integrate third-party API for sales tax and shipping calculator; created front-end applications using NextJS and ReactJS for internal interactions with MySQL and other databases; participated in weekly team meetings to discuss completed and upcoming projects and business requirements.

Senior Front-End Developer at FREEDOM FOREVER

June 1, 2020 - July 1, 2020

Updated and customized WordPress templates using HTML, CSS/SASS, and JavaScript; implemented Advanced Custom Fields for SEO and Google Analytics/Tag Manager compliance; built REST APIs with Strapi Headless CMS; developed reusable React components with hooks and GraphQL/Apollo Server connections; created a referral application integrated into an existing React portal with MySQL database and Firebase support.

Full-Stack Web Engineer - WordPress at 530MEDIALAB

September 1, 2019 - March 1, 2020

Created new and modified WordPress themes and plugins (WooCommerce); built React functional components and hooks for product and inventory updates from vendor APIs into the WooCommerce database, ensuring responsive design across devices; delivered end-user training on content management systems.

Senior Software Developer / Tech Lead at Tickets.com (MLB)

November 1, 2015 - August 1, 2019

Led development of a secondary ticketing platform driving $20M in new revenue in its first MLB season; modernized legacy B2C pages into responsive, mobile-first layouts; built React apps to automate workflows; collaborated across QA, PM, and design teams to deliver pixel-perfect UI from Figma/Photoshop; utilized Node.js, NPM, RxJS, and Parcel for bundling and performance gains.

Frontend Developer at DELL SOFTWARE (QUEST SOFTWARE)

November 1, 2014 - May 1, 2015

Rewrote front-end UI with HTML, CSS/JS, jQuery, and AngularJS; created test scenarios for QA; improved UX and performance across pages.

Software Engineer for RESI-SWAT TEAM at AUCTION.COM

January 1, 2013 - December 1, 2013

Analyzed and rewrote non-functioning PHP code per new business requirements; improved performance; engaged with UX designers to craft clean interfaces with simple, intuitive interactions.

Senior Full-Stack Engineer at WaredcCloud Consulting

October 1, 2020 - February 1, 2021

Help maintained client site (dreamdinners) with classic PHP and MySQL. Used PHP to integrate third-party API for sales tax and shipping calculator. Created front-end applications using NextJS and React for internal tools to interact with MySQL and other databases. Attended weekly meetings to discuss completed and upcoming projects and business requirements.

Senior Full-Stack Engineer at DELL Software (Quest Software)

November 1, 2014 - May 1, 2015

Researched alternative solutions to current site; implemented changes with HTML, CSS/JS, JQuery, and AngularJS. Created test scenarios for QA and training; built front-end applications with AngularJS.

Senior Frontend Developer II / Tech Lead at Nexient

October 1, 2021 - October 1, 2022

Led front-end development for e-commerce platforms including Lume.com, Etsy.com, and Ryerson.com. Built scalable features with React, Next.js (SSR), TypeScript, Redux, and Zustand, improving page load speeds by up to 40%. Guided UI/UX direction and implemented a component library that cut new feature development time by 25%. Coordinated with backend engineers to optimize Node.js + Prisma + MongoDB APIs, reducing API response times by 15%. Mentored junior developers.

FULL-STACK WEB ENGINEER at 530MEDIALAB

September 1, 2019 - March 1, 2020

Created and modified WordPress themes and plugins, including WooCommerce, leveraging front-end and back-end skills. Built ReactJS components and hooks for product and inventory updates via vendor APIs into WooCommerce, ensuring responsive design across devices. Delivered end-user training on CMS to enable staff to update sites.

SENIOR SOFTWARE DEVELOPER / TECH LEAD at TICKETS.COM (MLB Parent Company)

November 1, 2015 - August 1, 2019

Led development of a secondary ticketing platform, driving $20M in new revenue. Modernized legacy pages to responsive, mobile-first layouts and built ReactJS apps to automate workflows via API integrations. Collaborated with QA, PM, and design to deliver pixel-perfect UI from Figma/Photoshop. Used Node.js, NPM, RxJS, and Parcel for bundling and performance gains.

FRONT-END DEVELOPER at DELL SOFTWARE (QUEST SOFTWARE)

November 1, 2014 - May 1, 2015

Researched alternative solutions, participated in requirement discussions, and implemented front-end changes with HTML, CSS/SASS, JavaScript, JQuery, and AngularJS. Created test scenarios for QA and training.