Senior ReactJS Developer

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

Job Overview

• Job ID: J53269
• Job Title: Senior ReactJS Developer
• Location: Chicago, IL
• Duration: 12 Months + Extension
• Domain Exposure: Insurance
• Work Authorization: US Citizen,Green Card,OPT-EAD,CPT,H-1B,H4-EAD,L2-EAD,GC-EAD
• Client: To Be Discussed Later
• Employment Type: W-2, 1099, C2C

Job Description

We are seeking a highly skilled Senior ReactJS Developer with 8+ years of experience in building modern, scalable web applications. The ideal candidate will have strong hands-on expertise in React.js, Next.js, JavaScript/TypeScript, and frontend development best practices. This role requires close collaboration with product owners, UX designers, backend developers, and business stakeholders to deliver high-quality user experiences and performant web applications.

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.
• Advanced knowledge of JavaScript (ES6+) and TypeScript.
• Expertise in HTML5, CSS3, responsive design, and cross-browser compatibility.
• 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.

Equal Opportunity Employer

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.