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Senior ReactJS Developer- LOCALS TO MARYLAND ONLY

International Software Systems, Inc.
Baltimore, MD Contractor
POSTED ON 5/19/2026
AVAILABLE BEFORE 7/13/2026

100% on site and LOCALS ONLY

We are seeking a highly skilled Senior ReactJS Developer with strong experience in Node.js and modern front-end architecture to join our growing development team. The ideal candidate will have hands-on expertise building scalable enterprise applications using React, Flux/MobX architecture patterns, and RESTful APIs in fast-paced Agile environments.

Key Responsibilities

  • Design, develop, and maintain scalable web applications using ReactJS and Node.js
  • Build reusable, modular, and high-performance UI components
  • Develop responsive and user-friendly interfaces for enterprise applications
  • Implement state management solutions using Flux and/or MobX
  • Create and integrate RESTful APIs and backend services using Node.js and Express.js
  • Collaborate with UI/UX designers, backend developers, QA teams, and business stakeholders
  • Optimize application performance, scalability, and security
  • Write clean, maintainable, and well-documented code following best practices
  • Participate in architecture discussions, code reviews, and technical design sessions
  • Troubleshoot production issues and provide timely resolutions
  • Work within Agile/Scrum teams and participate in sprint planning, standups, and retrospectives
  • Mentor junior developers and provide technical leadership when needed
  • Ensure cross-browser compatibility and mobile responsiveness
  • Integrate third-party APIs, authentication services, and cloud-based solutions

Required Skills & Qualifications

  • 7 years of software development experience
  • Strong hands-on experience with ReactJS
  • Extensive experience with JavaScript (ES6 ), TypeScript, HTML5, and CSS3
  • Strong experience with Node.js and Express.js
  • Experience implementing state management using Flux and/or MobX
  • Experience with Redux is highly preferred
  • Strong understanding of component-based architecture and React lifecycle methods/hooks
  • Experience consuming and building RESTful APIs
  • Proficiency with Git and version control systems

Hourly Wage Estimation for Senior ReactJS Developer- LOCALS TO MARYLAND ONLY in Baltimore, MD
$45.00 to $59.00
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