Frontend Developer, Topsort

• We’re open to candidates who don’t check every box but show strong potential
• Bachelor's in Computer Science, engineering or a related field from top schools
• 3+ years of experience in front-end development, ideally in a B2B SaaS or platform product
• Deep expertise in React and modern JavaScript (ES2020+), with strong fundamentals in HTML and CSS
• Experience with front-end build tooling — Webpack, Vite, Babel, NPM — and an understanding of what's happening under the hood
• Strong instincts around responsive design, accessibility (WCAG), and web performance optimization
• Comfort working with RESTful APIs and async data patterns
• Experience with Git-based workflows and CI/CD pipelines
• A portfolio or project examples that show you can take something from concept to production
• Excellent communication skills — you can explain a technical tradeoff to a PM or a design decision to an engineer

Desirable

• We're looking for a Frontend Developer who takes pride in building interfaces that are fast, intuitive, and beautiful — and who wants to work on a product that's genuinely complex under the hood
• At Topsort, the frontend isn't just about rendering data. You'll be building dashboards that help advertisers manage campaigns, interfaces that let retailers configure their monetization stack, and real-time views of auction performance. The work is technically interesting, visually demanding, and directly tied to business outcomes
• You'll collaborate closely with designers, product managers, and backend engineers — and you'll be expected to own your work end-to-end, from architecture decisions to production
• Build and own core product features — from the initial component design to deployment — across our advertiser dashboard, retailer console, and analytics surfaces
• Translate complex auction and analytics data into clear, performant, and interactive UI experiences that make sense to non-technical users
• Develop and maintain our front-end component library — building reusable, accessible, and well-documented components that the whole team benefits from
• Collaborate with designers to implement pixel-perfect interfaces from Figma, pushing back constructively when something doesn't serve the user
• Integrate with backend APIs and real-time data streams — working with our backend engineers to design clean data contracts and handle edge cases gracefully
• Champion web performance — you'll own Core Web Vitals, lazy loading strategies, bundle optimization, and everything in between
• Ensure accessibility and cross-browser compatibility across our entire product surface, so every user gets a consistent, reliable experience
• Participate in architecture discussions — we want your opinion on the stack, not just your execution on tickets
• Write tests and maintain quality — unit tests, integration tests, and a culture of shipping things that work