ReactJS Developer

Ethereum Technologies; Chicago (IL); On-site; USD 140,000 - 180,000; Full time

Job summary

Ethereum Technologies in Chicago seeks a senior frontend engineer to build and maintain web apps using React.js and Next.js. You will develop reusable UI components, integrate with RESTful APIs and backend services, and collaborate with UX designers to deliver responsive interfaces.

You will optimize performance, participate in code reviews, mentor juniors, and support production deployments. Experience with Redux/Context API/Zustand, testing (Jest/Cypress), Git, CI/CD, and Azure is highly

Qualifications

• 8+ years of software development experience with strong frontend development expertise.
• 5+ years of hands-on experience with React.js.
• Strong experience with Next.js and modern frontend development frameworks.
• Hands-on experience with state management libraries such as Redux, Context API, or Zustand.
• Experience integrating REST APIs and GraphQL services.
• Understanding of microservices-based applications and event-driven architectures.
• Experience with frontend testing frameworks such as Jest, React Testing Library, or Cypress.
• Familiarity with Git, CI/CD pipelines, and Azure-based deployment environments.

Responsibilities

• Develop and maintain web applications using React.js and Next.js.
• Build reusable, maintainable, and responsive UI components.
• Integrate frontend applications with RESTful APIs and backend microservices.
• Collaborate with UX/UI designers to implement user-friendly interfaces.
• Optimize applications for performance, scalability, accessibility, and responsiveness.
• Participate in code reviews and contribute to coding standards and best practices.
• Troubleshoot and resolve application issues across development, testing, and production environments.
• Work closely with backend teams to implement secure and efficient integrations.
• Participate in Agile ceremonies including sprint planning, stand-ups, and retrospectives.
• Mentor junior developers and contribute to knowledge sharing within the team.
• Support deployment activities and production issue resolution as needed.

Skills

React.js

Next.js

Redux/Context API/Zustand

REST/GraphQL

Frontend testing

Git/CI-CD

Azure deployment

Agile/Scrum

Tools

Git

CI/CD

Azure

Jest

Cypress

Job description

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

Key Responsibilities:

• Develop and maintain web applications using React.js and Next.js.
• Build reusable, maintainable, and responsive UI components.
• Integrate frontend applications with RESTful APIs and backend microservices.
• Collaborate with UX/UI designers to implement user-friendly interfaces.
• Optimize applications for performance, scalability, accessibility, and responsiveness.
• Participate in code reviews and contribute to coding standards and best practices.
• Troubleshoot and resolve application issues across development, testing, and production environments.
• Work closely with backend teams to implement secure and efficient integrations.
• Participate in Agile ceremonies including sprint planning, stand-ups, and retrospectives.
• Mentor junior developers and contribute to knowledge sharing within the team.
• Support deployment activities and production issue resolution as needed.

Required Skillset:

• 8+ years of software development experience with strong frontend development expertise.
• 5+ years of hands-on experience with React.js.
• Strong experience with Next.js and modern frontend development frameworks.
• Hands-on experience with state management libraries such as Redux, Context API, or Zustand.
• Experience integrating REST APIs and GraphQL services.
• Understanding of microservices-based applications and event-driven architectures.
• Experience with frontend testing frameworks such as Jest, React Testing Library, or Cypress.
• Familiarity with Git, CI/CD pipelines, and Azure-based deployment environments.
• Strong debugging, performance optimization, and problem-solving skills.

Preferred Qualifications:

• Experience working on enterprise-scale web applications.
• Exposure to Azure cloud services and cloud-hosted application deployments.
• Experience in Healthcare or other regulated industries is a plus.
• Strong communication and collaboration skills.
• Experience working in Agile/Scrum teams.
• Ability to work effectively with onsite and offshore teams.

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.