Demo

React Developer

Delta System & Software, Inc.
San Leandro, CA Contractor
POSTED ON 1/28/2026 CLOSED ON 2/25/2026

What are the responsibilities and job description for the React Developer position at Delta System & Software, Inc.?

Role Overview


We’re seeking a Senior React Developer with a strong programming background to lead the design and implementation of high-quality, performant front-end applications. You will shape UI architecture, mentor engineers, and collaborate closely with product, design, and backend teams to deliver resilient, accessible, and scalable user experiences.


Key Responsibilities


  • Lead front-end architecture and develop complex, reusable React components and hooks.
  • Drive state management patterns (e.g., Redux) and ensure predictable data flows in large applications.
  • Integrate REST APIs, handle JSON payloads, and optimize network interactions.
  • Enforce coding standards, conduct code reviews, and improve test coverage with Jest/React Testing Library/Enzyme.
  • Partner with designers to implement responsive, accessible UIs using HTML5, CSS3/SASS, and component libraries (e.g., Material UI/React Bootstrap).
  • Champion performance and accessibility best practices; instrument and debug with modern browser tools.
  • Collaborate in Agile ceremonies; help define stories, acceptance criteria, and release plans.


Required Qualifications


  • 6–10 years of professional software development, with 4 years focused on React.js at scale.
  • Expert-level JavaScript/TypeScript and deep knowledge of ES6 patterns and React internals. ,
  • Proven experience with Redux, component composition, custom hooks, and performance optimization. ,
  • Strong front-end engineering fundamentals: semantic HTML, modern CSS, responsive design, and accessibility (WCAG/ADA).
  • Hands-on testing experience (unit, integration, E2E) with Jest/RTL/Enzyme; CI integration. ,
  • Proficiency with Git and common workflows; comfort with Agile/Scrum delivery.


Preferred Qualifications


  • Familiarity with Next.js, charting/grid libraries (e.g., agGrid, Recharts/Highcharts), and modern build tooling.
  • Experience collaborating with cross-functional teams in regulated or enterprise environments.

Hourly Wage Estimation for React Developer in San Leandro, CA
$48.00 to $55.00
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