Join a collaborative team building modern React-based applications that power campaign management, reporting, billing integrations, and seller-facing experiences across a large digital advertising ecosystem. This is an exciting opportunity for a front-end developer who enjoys solving complex problems, partnering with cross-functional teammates, and creating polished user experiences that make an impact.

Responsibilities

• Design, build, and maintain scalable front-end applications using React and modern JavaScript
• Partner with designers and backend engineers to deliver features from concept through release
• Write clean, maintainable, and well-tested code that supports high-quality user experiences
• Improve application performance and responsiveness across key user workflows
• Contribute to technical discussions around architecture, design, and implementation approaches
• Support ongoing enhancements to tools used for campaign creation, monitoring, reporting, and spend tracking
• Stay current with front-end best practices, emerging tools, and accessibility standards

Skills

• 5+ years of professional front-end development experience
• Strong hands-on experience with React and modern JavaScript
• Solid understanding of HTML, CSS, and accessibility best practices
• Experience working with Redux or similar state management patterns
• Strong debugging and problem-solving abilities
• Excellent communication skills and the ability to collaborate effectively in a small team
• Ability to work independently, stay organized, and manage priorities proactively

Preferred Skills

• Experience supporting enterprise or customer-facing web applications
• Familiarity with advertising technology, retail media, or campaign management tools
• Background contributing to performance optimization initiatives
• Experience working in a cross-functional product environment
• Interest in design systems, component reusability, and front-end architecture

Horizontal is committed to building an inclusive environment where people from all backgrounds are welcomed, respected, and empowered to do their best work. We value diversity, equity, and inclusion as essential to our culture and to the success of the teams we support.