Front End Developer

Ethereum Technologies; Mendota Heights (MN); On-site; USD 120,000 - 180,000; Full time

Job summary

Ethereum Technologies in Mendota Heights, MN seeks a Senior Front End Developer to own and deliver scalable, enterprise web applications using React, Next.js, and TypeScript. You will lead UI/UX implementation, contribute to a design system with Storybook, and collaborate with product, design, backend, QA, and architecture teams to ship production-ready front end solutions.

Responsibilities include building responsive apps with modern Next.js patterns, integrating RESTful APIs, optimizing Core

Qualifications

• Experience building scalable front end systems with React.js, Next.js, and TypeScript.
• Strong knowledge of responsive design, accessibility, and performance.
• Experience with design systems and component-driven development.

Responsibilities

• Development: Build responsive web apps using React 19, Next.js 16+, TypeScript, Tailwind CSS, and shadcn/ui.
• Architecture: Utilize modern Next.js patterns including App Router, Server/Client Components, SSR/SSG/ISR, caching, and middleware.
• UI/UX: Translate Figma designs into pixel accurate user interfaces; contribute to enterprise design systems and document components via Storybook.
• Data & State: Integrate RESTful APIs with robust asynchronous handling; manage state using TanStack and React Context.
• Optimization: Maximize Core Web Vitals, code splitting, lazy loading, and bundle performance across devices.
• Quality & Testing: Write clean code; develop tests (Jest, React Testing Library, Cypress, Playwright); perform debugging and code reviews.
• DevOps: Utilize Git workflows and support CI/CD pipelines (Vercel, AWS, Azure).
• Leadership: Stay updated on industry trends; mentor junior and mid level developers to improve engineering maturity.

Skills

React.js

Next.js

TypeScript

UI/UX

Web Accessibility

REST APIs

Performance Optimization

Tools

Tailwind CSS

shadcn/ui

Storybook

Jest

Cypress

Playwright

Vercel

AWS

Azure

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

Job Summary:

We are seeking a Senior Front End Developer with extensive hands on experience in React, Next.js, and TypeScript. You will build scalable, responsive, accessible, and high performance enterprise web applications. This role requires technical ownership and close collaboration with product, design, backend, QA, and architecture teams to deliver production ready front end solutions.

Responsibilities:

• Development: Build responsive web apps using React 19, Next.js 16+, TypeScript, Tailwind CSS, and shadcn/ui.
• Architecture: Utilize modern Next.js patterns including App Router, Server/Client Components, SSR/SSG/ISR, caching, and middleware.
• UI/UX: Translate Figma designs into pixel accurate user interfaces; contribute to enterprise design systems and document components via Storybook.
• Data & State: Integrate RESTful APIs with robust asynchronous handling; manage state using TanStack and React Context.
• Optimization: Maximize Core Web Vitals, code splitting, lazy loading, and bundle performance across devices.
• Quality & Testing: Write clean code; develop tests (Jest, React Testing Library, Cypress, Playwright); perform debugging and code reviews.
• DevOps: Utilize Git workflows and support CI/CD pipelines (Vercel, AWS, Azure).
• Leadership: Stay updated on industry trends; mentor junior and mid level developers to improve engineering maturity.

Core Skills:

• Expert knowledge of React.js (hooks, context, lifecycle), Next.js, TypeScript, ES6+, HTML5, CSS3, and DOM manipulation.
• Styling & Systems: Deep experience with Tailwind CSS, mobile first design, web accessibility (WCAG), and component driven workflows.

Preferred Qualifications

• Next.js Advanced: Expertise in App Router, React Server Components, route handlers, revalidation, and SEO optimization.
• Tools & Libraries: Experience with UI toolkits (Radix, Material UI, Chakra) and monorepos (Turborepo, Nx, pnpm workspaces).
• Security & Infrastructure: Familiarity with authentication (OAuth, JWT), cloud platforms, and Agile/Scrum delivery environments.

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.