Topsort

About the Company

Topsort is the leading Retail Media Infrastructure company, supporting omni-channel retailers, marketplaces, and delivery apps across more than 40 countries worldwide. We prioritize our customers, focus on innovative products, and adhere to a privacy-by-design ad monetization framework. Our solutions leverage advanced AI and machine learning technology, making Silicon Valley's advertising expertise accessible to all through user-friendly, high-performance products. Topsort's customers include Ambev, Petco, HEB, Trademe, Poshmark, DeliveryHero's Glovo, Nana and more..

Listed Jobs

Company Name

Topsort

Job Title

Senior Frontend Engineer

Job Description

**Job Title**: Senior Frontend Engineer **Role Summary**: Build and optimize high-performance user interfaces for Topsort’s AI-driven advertising platform, delivering intuitive, secure, and scalable web experiences in a fast-paced global startup environment focused on privacy-first solutions. **Expectations**: - 5+ years of front-end development experience - Bachelor’s degree in Computer Science, Design, or related field - Proficiency in JavaScript frameworks (React, ideally Next.js) and modern web standards (HTML/CSS) - Expertise in cross-browser compatibility, responsive design, accessibility, and performance optimization - Experience with build tools (Webpack, Babel, NPM) **Key Responsibilities**: - Develop, maintain, and optimize user-facing components and interfaces. - Collaborate with designers, product managers, and backend engineers to implement features. - Ensure responsive, accessible, and high-performing web applications across platforms. **Required Skills**: - JavaScript frameworks (React, Vue.js) - Modern web development (HTML5, CSS3) - Front-end build tools (Webpack, Babel, NPM) - Responsive/adaptive design principles - Cross-browser compatibility testing **Required Education & Certifications**: - Bachelor’s in Computer Science, Design, or related field - No specific certifications required

London, United kingdom

On site

Senior

22-12-2025

Company Name

Topsort

Job Title

Frontend Engineer

Job Description

Job title: Frontend Engineer Role Summary: Design, develop, and maintain responsive, high‑performance user interfaces for a privacy‑first advertising platform. Collaborate closely with product, design, and backend teams to deliver clean, scalable web experiences. Expectations: Deliver production‑ready code with minimal defects. Participate in code reviews, pair programming, and continuous learning. Contribute to technical discussions, propose improvements, and help shape frontend architecture. Key Responsibilities: - Build, test, and optimize reusable React (and Next.js) components. - Implement new features in collaboration with designers, PMs, and backend engineers. - Ensure cross‑browser compatibility and responsive design. - Monitor and improve web performance, accessibility, and SEO. - Integrate with REST/GraphQL APIs and handle state management. - Participate in sprint planning, stand‑ups, and retrospectives. Required Skills: - 2+ years professional front‑end development. - Strong JavaScript (ES6+), HTML5, CSS3. - Proficiency with React; experience with Next.js preferred. - Familiarity with Webpack, Babel, npm/yarn. - Knowledge of responsive design, accessibility (WCAG), and performance optimization. - Experience with version control (Git). - Ability to write clean, maintainable, well‑tested code. Required Education & Certifications: - Bachelor’s degree in Computer Science, Software Engineering, or related field.

Somerville, United states

On site

Junior

22-12-2025

Company Name

Topsort

Job Title

Product Analyst

Job Description

**Job Title:** Product Analyst **Role Summary:** Bridge complex data insights into actionable product strategies, driving growth through data discovery, metric mastery, and stakeholder communication in a fast‑paced, technology‑centric environment. **Expectations:** - Translate large datasets into product value and strategic decisions. - Work cross‑functionally with Engineering and Product teams to embed data‑driven culture. - Deliver clear, actionable insights to internal teams and external clients. **Key Responsibilities:** 1. Conduct data discovery using SQL and Python to uncover growth opportunities. 2. Define, monitor, and refine product KPIs, assessing statistical significance and target achievement. 3. Advocate technical findings to stakeholders, translating insights into product road‑map actions. 4. Collaborate with Engineering/Product to ensure data‑driven features are launched. 5. Build dashboards and visualizations that simplify complex requirements for decision makers. **Required Skills:** - Strong quantitative foundation (Engineering, Math, Physics, Economics, Computer Science). - Proficiency in SQL; experience in Python for data analysis and statistical modeling. - Data visualization expertise (BI tools; Metabase preferred). - Logical, first‑principles problem‑solving under ambiguity. - Excellent communication, able to present technical concepts to non‑technical audiences. - Advanced/Fluent English proficiency. **Required Education & Certifications:** - Bachelor’s or Master’s degree in a quantitative discipline (Engineering, Mathematics, Physics, Economics, Computer Science). - Optional certifications: SQL, Python, Data Analysis, or BI tools (e.g., Tableau, Power BI, Metabase).

Boston, United states

On site

04-01-2026