Senior React Developer

Job Title: Senior React Developer

Location: San Leandro, CA

Type: Contract

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.