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Front End Developer

Job in San Francisco, San Francisco County, California, 94199, USA
Listing for: Hiring Harmony Test
Full Time position
Listed on 2026-10-12
Job specializations:
  • Software Development
    App Developer - Mobile/Web, Front End Developer
Salary/Wage Range or Industry Benchmark: 110000 - 150000 USD Yearly USD 110000.00 150000.00 YEAR
Job Description & How to Apply Below
About the role

We’re seeking a detail-oriented and collaborative Front End Developer to help build, enhance, and maintain mobile applications that are reliable, accessible, responsive, and easy to use. In this role, you’ll translate product requirements and designs into high-quality mobile experiences, develop reusable components, integrate APIs and services, troubleshoot issues, and collaborate with product, design, engineering, quality assurance, and other internal teams. You’ll contribute to application performance, usability, maintainability, release readiness, and a consistent user experience across supported devices and platforms.

What you’ll do
  • Develop, enhance, and maintain front-end features for mobile applications based on product requirements, technical specifications, user stories, and acceptance criteria

  • Translate user interface designs, prototypes, and workflows into accessible, responsive, and maintainable mobile experiences

  • Build reusable components, screens, navigation flows, forms, and other front-end functionality using approved frameworks, libraries, and development standards

  • Integrate mobile applications with APIs, backend services, authentication systems, databases, analytics platforms, and other application services

  • Write clear, maintainable, testable, and well-documented code that follows established architecture, coding, security, and performance practices

  • Optimize application performance, responsiveness, startup time, memory usage, network behavior, battery consumption, and overall user experience

  • Ensure mobile interfaces work consistently across supported devices, screen sizes, operating systems, orientations, and network conditions

  • Implement accessibility considerations, including semantic interfaces, keyboard or assistive technology support, readable content, appropriate contrast, and inclusive interaction patterns

  • Identify, investigate, reproduce, document, and resolve application defects, technical issues, usability problems, and production incidents

  • Write and maintain unit, component, integration, end-to-end, and other applicable automated tests for front-end functionality

  • Participate in code reviews and provide constructive feedback related to functionality, quality, maintainability, security, performance, and user experience

  • Collaborate with product managers, designers, backend developers, quality assurance professionals, analysts, operations, and other stakeholders to clarify requirements and resolve issues

  • Participate in refinement sessions, sprint planning, daily coordination, sprint reviews, retrospectives, release planning, and other project meetings

  • Use version control, build systems, continuous integration and delivery pipelines, debugging tools, monitoring tools, and release platforms to support development and deployment

  • Contribute to technical documentation, development standards, architecture decisions, release notes, support materials, and team knowledge sharing

  • Recommend improvements to mobile development practices, application architecture, developer workflows, testing strategies, and engineering processes

How you’ll work

You’ll work cross-functionally with product, design, backend engineering, quality assurance, operations, customer support, and other internal teams. The role combines front-end development, user interface implementation, API integration, testing, debugging, code review, technical communication, and continuous improvement. You’ll balance planned development with changing priorities, evolving requirements, technical constraints, and time-sensitive releases. Success in this role requires careful attention to detail, sound technical judgment, curiosity, clear communication, and a commitment to building dependable mobile experiences.

Who you…
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