UI Developer

Ethereum Technologies; Philadelphia (Philadelphia County); On-site; USD 90,000 - 120,000; Full time

Job summary

Ethereum Technologies seeks a front-end developer to translate design concepts into high-quality interfaces. You will build reusable UI components, create SPAs with React or Angular, and ensure accessibility and performance across devices.

Join a collaborative team that integrates with backend services, optimizes rendering, and ships polished user experiences in an Agile setting. This role emphasizes modern tooling like Bootstrap, MUI, Tailwind, and Vite.

Qualifications

• Proven front-end development experience with modern JS frameworks.
• Experience turning UI/UX designs into functional, accessible UI.
• Strong knowledge of REST APIs and JSON data handling.

Responsibilities

• Build reusable UI components and front-end modules.
• Develop SPAs using React.js, Angular, or Vue.js.
• Convert Figma/Adobe XD designs into interfaces.
• Implement responsive layouts with CSS Grid/Flexbox/Bootstrap.
• Integrate RESTful APIs and backend services into UIs.
• Optimize performance, rendering, and loading times.
• Manage state with Redux/Context API or NgRx.
• Follow accessibility standards and UI best practices.
• Perform debugging, unit testing, and code reviews.
• Collaborate with UX, backend, and product teams.

Skills

React.js

Angular

Responsive design

REST APIs

JSON

Git / GitHub

Jest

Tools

Bootstrap

Material UI

Tailwind CSS

Webpack

Vite

npm

Job description

US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other

Work Authorization:US Citizen, Green Card, OPT-EAD, CPT, H-1B, H4-EAD, Other

Key Responsibilities

• Build reusable UI components and front-end modules.
• Develop single-page applications using React.js, Angular, or Vue.js.
• Convert Figma and Adobe XD designs into functional user interfaces.
• Implement responsive layouts using CSS Grid, Flexbox, and Bootstrap.
• Integrate RESTful APIs and backend services into front-end applications.
• Optimize application performance, rendering, and loading speed.
• Implement state management using Redux, Context API, or NgRx.
• Follow accessibility standards and UI development best practices.
• Perform debugging, unit testing, and code reviews.
• Collaborate with UX designers, backend developers, and product teams.
• Maintain coding standards and participate in Agile/Scrum ceremonies.

Required Technical Skills

• Hands-on experience with React.js or Angular.
• Experience with Bootstrap, Material UI, and Tailwind CSS.
• Knowledge of REST APIs and JSON.
• Understanding of responsive and mobile-first development.
• Experience with Git, GitHub, and version control.
• Knowledge of Jest, Jasmine, or Cypress.
• Familiarity with Webpack, Vite, and npm.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.