Senior Frontend Engineer - Tracking & CDP Architecture

DFDS; København; On-site; DKK 700,000 - 1,000,000; Full time

Job summary

DFDS, Copenhagen-based, seeks a Senior Frontend Engineer - Tracking to join our Martech team and help shape scalable tracking and personalised customer journeys. You will work at the intersection of frontend engineering, analytics, and marketing technology.

You will contribute to a strong CDP foundation, collaborate with engineering, analytics and marketing, and ensure reliable tracking and data flows across channels while maintaining privacy-aware practices.

Qualifications

• Strong experience developing modern web applications using TypeScript, React, and Next.js.
• Extensive hands-on expertise with Google Tag Manager (GTM) and server-side GTM, including configuration, deployment, and ongoing management across different environments.
• Deep knowledge of JavaScript-based tracking implementations and data layer architecture, with experience tracking user interactions and application events.
• Experience implementing and maintaining consent management and privacy compliance solutions.
• Excellent troubleshooting skills, leveraging tools such as Chrome DevTools, Tag Assistant, network analysis, and advertising platform debugging tools.
• Experience with or a strong interest in Customer Data Platforms (CDPs), with Twilio Segment experience considered a plus.
• Proven ability to perform tracking audits, quality assurance, and debugging, identifying and resolving challenges related to event tracking, attribution, CORS, CSP, and data collection.

Responsibilities

• Build and improve frontend implementations that support customer-facing journeys and Martech use cases.
• Help establish and evolve a strong CDP foundation, with Twilio Segment experience considered a strong advantage.
• Work with tracking, analytics, and customer data flows to ensure reliable insights and activation across web.

Skills

Frontend development

TypeScript

React

Next.js

Tracking & data layer

Troubleshooting

Tools

Google Tag Manager (GTM)

Server-side GTM

Twilio Segment

Job description

DFDS, Copenhagen-based, seeks a Senior Frontend Engineer - Tracking to join our Martech team and help shape scalable tracking and personalised customer journeys. You will work at the intersection of frontend engineering, analytics, and marketing technology.

You will contribute to a strong CDP foundation, collaborate with engineering, analytics and marketing, and ensure reliable tracking and data flows across channels while maintaining privacy-aware practices.