Backend developer Jobs in Hayward, CA

Position: Lead React.js Developer

Location: San Leandro, CA***Onsite***

Duration: 1 Year

Job Summary

We are seeking an accomplished Lead React.js Developer to design and deliver large-scale, high-quality web applications that provide exceptional customer experiences.

The ideal candidate combines deep front-end engineering expertise with sound technical judgment, strong communication skills, and a proven ability to lead teams in dynamic, Agile environments.

In this role, you will translate business requirements into scalable technical solutions, guide engineering decisions, promote innovation, and help build a collaborative culture focused on quality, accountability, and continuous improvement.

Key Responsibilities:

• Lead the design, development, and delivery of large-scale, reliable, and maintainable front-end applications.
• Build enterprise-grade, responsive user experiences using React.js, Redux, JavaScript, and modern front-end development practices.
• Partner with business stakeholders, product managers, architects, and engineering teams to translate requirements into practical, scalable technical solutions.
• Make sound technical decisions involving application architecture, component design, state management, build tooling, performance, and maintainability.
• Adapt quickly to new technologies, tools, and changing priorities while maintaining a strong focus on customer experience and delivery quality.
• Facilitate brainstorming and technical design sessions that encourage experimentation, collaboration, and innovation.
• Motivate and mentor team members, share engineering best practices, and support managers in guiding individual career growth.
• Establish and uphold standards for code quality, testing, peer reviews, documentation, security, accessibility, and release readiness.
• Identify and resolve complex technical issues across development, build, testing, and deployment workflows.
• Participate actively in Agile delivery activities, including daily stand-ups, sprint planning, backlog refinement, reviews, and retrospectives.
• Communicate technical direction, risks, trade-offs, and progress clearly to both technical and non-technical stakeholders.

Skill Requirements

• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
• Five or more years of experience developing web applications with front-end technologies and associated testing tools and methodologies.
• At least three years of hands-on experience developing React.js applications using Redux.
• Strong proficiency in JavaScript, React.js, Redux, Node.js, Webpack, and related front-end development tools.
• Strong understanding of modern front-end build pipelines, package management, modular architecture, and development workflows.
• Demonstrated experience building enterprise-grade, responsive web applications.
• Proven ability to lead the delivery of large-scale, high-quality systems.
• Strong analytical, troubleshooting, and problem-solving skills.
• Ability to understand business requirements and convert them into effective technical designs and implementation plans.
• Experience working in Agile environments with shared accountability to a software development team.
• Exceptional written and verbal communication skills, with a record of making sound technical decisions and clearly explaining trade-offs.

Other Requirements

• Experience with TypeScript, HTML5, CSS3, reusable component libraries, and accessible user interface development.
• Experience with front-end testing frameworks and libraries such as Jest, React Testing Library, Jasmine, Mocha, or Chai.
• Knowledge of application security, web performance analysis, and front-end performance tuning.
• Experience with continuous integration and continuous delivery pipelines, source control, and automated quality checks.
• Prior experience mentoring developers or serving as a technical lead in a cross-functional engineering team.

Key Responsibilities

• Adapt quickly to new technologies and changing situations with a focus on delivering the best customer experience.
• Proven track record of leading the delivery of large-scale, high-quality systems.
• Conduct frequent brainstorming sessions, motivate teams, and drive innovation while helping managers guide the career growth of their team members.
• Exceptional communication skills and a proven track record of making sound technical decisions and judgments.
• Ability to understand business requirements and translate them into technical solutions.

Qualifications

• Bachelor's degree in Computer Science, Engineering, or a related field.
• Minimum 3+ years of hands-on experience developing React.js-based applications using Redux.
• Strong proficiency with Node.js, Webpack, and other tools related to React front-end development.
• Knowledge of modern front-end build pipelines and development tools.
• Experience developing enterprise-grade responsive web applications.
• Strong analytical and problem-solving skills.
• 5+ years of demonstrated experience developing web applications using front-end technologies and related testing tools and methodologies.
• Experience working in Agile environments, including daily stand-ups, Scrum ceremonies, and accountability to the software development team.