Senior Frontend Engineer
TopsortSomerville, Massachusetts, United States • California, United States • Santiago Metropolitan Region, Chile • São Paulo, Brazil • Barcelona, Catalonia, Spain • Sydney, New South Wales, Australia
Posted October 10, 2025
Full Time
About the Company
Topsort is a leading Retail Media Infrastructure company offering advanced AI-driven advertising solutions to omni-channel retailers, marketplaces, and delivery apps globally. Our innovative products prioritize customer privacy and provide user-friendly, high-performance ad monetization services across various platforms, including sponsored listings, auction-based advertising, and native ads. With a focus on accessibility and efficiency, Topsort empowers businesses with scalable retail media solutions through cutting-edge technology.
Job Description
Topsort is a rapidly growing Retail Media company seeking a Senior Frontend Developer to build and optimize user-facing features for their platform. The role involves working closely with designers, product managers, and backend engineers to deliver responsive web experiences, focusing on performance, accessibility, and scalability. Topsort emphasizes a collaborative, fast-paced environment with a focus on innovation and impact.
Requirements
- Develop, maintain, and optimize front-end components and user interfaces.
- Work closely with designers, product managers, and backend developers.
- Ensure cross-browser compatibility and responsive design for web applications.
- Strong knowledge of JavaScript, HTML, CSS, and front-end frameworks (React, Vue.js or similar).
- Proficiency in modern JavaScript frameworks (React, Vue.js, or similar).
- Experience with front-end build tools and workflows (Webpack, Babel, NPM).
- Strong understanding of responsive design, accessibility, and web performance optimization.
Benefits
- Competitive salary
- Opportunity to work with cutting-edge technology
- Collaborative environment
- Fast-paced startup culture