Senior React/Next.js Engineer - Chicago, 12+ Month Contract

MACHINE LEARNING TECHNOLOGIES LLC; Chicago (IL); On-site; USD 140,000 - 180,000; Full time

Job summary

MACHINE LEARNING TECHNOLOGIES LLC in Chicago, IL seeks a Senior ReactJS Developer to design and implement scalable web applications using React.js, Next.js, and TypeScript. The role collaborates with product, UX, and backend teams to deliver high-quality UIs, APIs integration, performance optimization, and accessibility best practices.

Candidates with 8+ years experience, strong frontend skills, and experience with Redux, GraphQL, and CI/CD pipelines are encouraged to apply; this is a 12-month +

Qualifications

• 8+ years of software development with strong frontend focus.
• 5+ years of React.js experience.
• Strong Next.js and modern frontend frameworks.
• Advanced knowledge of JavaScript/TypeScript.
• HTML5, CSS3, responsive design, cross-browser compatibility.
• Experience with Redux, Context API, or Zustand.
• REST APIs and GraphQL integration.
• Understanding of microservices and event-driven architectures.
• Frontend testing with Jest, RTL, or Cypress.
• Git, CI/CD pipelines, and Azure deployment.

Responsibilities

• Develop and maintain web apps using React.js and Next.js.
• Build reusable, responsive UI components.
• Integrate frontend with REST APIs and microservices.
• Collaborate with UX designers for user-friendly interfaces.
• Optimize performance, accessibility, and responsiveness.
• Participate in code reviews and define best practices.
• Troubleshoot issues across dev, test and prod.
• Work with backend teams on secure integrations.
• Engage in Agile ceremonies (sprints, stand-ups, retros).
• Mentor junior developers and share knowledge.
• Support deployment activities and production issue resolution.

Skills

React.js

Next.js

JavaScript/TypeScript

HTML5

CSS3

State management

REST APIs

GraphQL

Microservices

Testing (Jest/RTL/Cypress)

Git/CI-CD/Azure

Tools

Git

CI/CD

Azure

Job description

MACHINE LEARNING TECHNOLOGIES LLC in Chicago, IL seeks a Senior ReactJS Developer to design and implement scalable web applications using React.js, Next.js, and TypeScript. The role collaborates with product, UX, and backend teams to deliver high-quality UIs, APIs integration, performance optimization, and accessibility best practices.

Candidates with 8+ years experience, strong frontend skills, and experience with Redux, GraphQL, and CI/CD pipelines are encouraged to apply; this is a 12-month +