Senior JavaScript/Google Tag Developer

Description

Summary: Seeking a Senior Google Tag Developer to design, develop, validate, and maintain the JavaScript data layer for a new headless e-commerce platform. Highlights: 1. Design and maintain the JavaScript data layer 2. Integrate with GTM and GA4 for data usability 3. Collaborate with Frontend, QA, and Analytics teams We are seeking Senior Google Tag Developer to support the implementation of its new headless e\-commerce platform. This role will be responsible for designing, developing, validating, and maintaining the JavaScript data layer used by Google Tag Manager, Google Analytics, and related analytics and marketing platforms. **Required Qualifications** * Strong hands\-on experience with JavaScript (preferably React and/or Next.js.) * Experience developing data layer implementations for Google Tag Manager. * Experience with **window.dataLayer and dataLayer.push() event structures.** * Understanding of single\-page application tracking challenges. * Experience with e\-commerce tracking requirements. * Ability to translate business analytics requirements into technical implementation details. * Strong browser debugging skills using Chrome DevTools, GTM Preview Mode, and analytics debugging tools. * Experience troubleshooting event timing, duplicate events, state changes, and asynchronous data availability. * Ability to work with APIs, JSON payloads, and structured data. * Strong documentation and communication skills. * Experience working in Agile development environments. **Nice to Have:** * Experience with Salesforce platforms * Familiarity with Jira, Azure DevOps, GitHub, GitHub Copilot, and CI/CD processes. * Experience writing QA\-ready technical specifications and acceptance criteria. **Responsibilities** * Design and maintain the JavaScript data layer * Implement e\-commerce events (product, cart, checkout, purchase, login, subscriptions, promotions) * Ensure correct event timing and data accuracy in SPA/SSR (React / Next.js) * Prevent and fix duplicate, missing, or incorrect events * Integrate with GTM and GA4 and ensure data usability (reporting, attribution, personalization) * Translate requirements into data layer specifications * Collaborate with Frontend, QA, Analytics teams * Ensure consent\-aware tracking **What We Offer** * Fully remote work * International team with clear processes * Paid vacation, holidays, and sick leave Job Type: Full\-time Pay: R$15,000\.00 \- R$23,400\.00 per month Application Question(s): * Have you personally implemented a data layer (window.dataLayer) from scratch? What kind of events did you design? * Have you personally implemented a data layer (window.dataLayer) from scratch? * What’s your experience with tracking in SPAs (React / Next.js)? * Have you worked on e\-commerce tracking (cart, checkout, purchase)? If yes — what platform / setup? * What tools do you typically use for debugging (GTM Preview, DevTools, etc.)? * How comfortable are you with JavaScript when it comes to debugging or building tracking logic? Work Location: Remote