Tracking Developer (Fullstack JS)

Description

Job Summary: This strategic role involves developing production code for a custom CRM, focusing on the tracking and attribution layer to optimize campaigns and improve media return on investment. Key Highlights: 1. Strategic position with direct impact on campaign optimization 2. Hands-on development in production code of a custom CRM 3. Focus on tracking and attribution using technologies such as Node.js and GTM This role requires direct involvement in the production code of a custom CRM. Code failures impact the sales pipeline in real time. We seek someone with genuine technical maturity—not just superficial familiarity with the tools. About the Role You will own the entire tracking and attribution layer—from conversion events in the CRM to GTM tag configuration Server\-Side. The infrastructure is already implemented and robust. Your responsibility will be to maintain its high-quality operation, evolve it as new funnels and channels are tested, and ensure data arriving in media platforms is accurate and reliable. **This is a strategic role:** tracking quality directly impacts campaign optimization and media return on investment. Critical Requirements Development — you will work directly on production code **Proficiency in Node.js:** async/await, error handling, object and array manipulation, consuming external APIs Ability to read, understand, and modify existing code without rewriting from scratch—the CRM is already in production **Awareness of deployment impact:** knowing what could break, testing before deploying, rolling back when necessary **REST APIs:** authentication, payloads, headers, autonomous response and error handling **Hashing and basic security:** SHA\-256 for user data normalization (required by Meta CAPI) Familiarity with Firestore or another NoSQL database for reading and writing session data Tracking & Attribution **GTM Web and Server\-Side:** creating and editing tags, triggers, variables; using preview/debug mode independently **Meta Conversions API (CAPI):** payload structure, Event Match Quality, deduplication with pixel, diagnostics in Events Manager **Tracking fundamentals:** UTMs, first\-party cookies, fbc/fbp, session attribution, fingerprinting Ability to debug complex issues—e.g., event not firing, incorrect parameter, inconsistent data between CRM and platform Experience with at least one advertising platform besides Meta (Google Ads or TikTok) Expected Behavior **Technical autonomy:** solving problems without constant supervision Clear communication with non\-technical teams (growth, media) and technical teams (senior developers) Nice-to-Haves Production experience with Stape or GTM Server\-Side Knowledge of attribution platforms (RedTrack, Hyros, Voluum) Experience with WhatsApp funnels and offline conversion attribution **Familiarity with multiple media platforms:** Google Ads, TikTok Ads Your Responsibilities Implement and adjust event firing in the CRM via CAPI (click\_deal, Contact, Purchase, etc.)—directly in code **Fix event logic issues:** e.g., event firing to wrong audience, incomplete payload, failed deduplication Monitor event quality daily in Events Manager (EMQ, volume, diagnostics) Maintain and adjust GTM Web and Server\-Side containers in Stape Configure tracking for new funnels, landing pages, and offers per growth team’s requests Implement tracking for new channels (Google Ads, TikTok) in GTM Server and in the CRM Evaluate and recommend multichannel attribution tools when needed Document all configurations, processes, and changes made Optimize existing pages Develop new pages