Client Integration Engineer: AdTech Solutions Architect

Publicis Groupe UK; Greater London; Hybrid; GBP 70,000 - 95,000; Full time

Job summary

Epsilon, part of Publicis Groupe, seeks a Client Integration Engineer in London. You will develop scripts, maintain data feeds, and integrate clients into the Epsilon platform, acting as a hybrid web technologist and solutions architect.

You’ll collaborate across engineering, analytics, product, and sales to deliver scalable, data-driven solutions. Ideal candidates have 3+ years in a similar digital role, with expertise in JavaScript, SQL, HTML, and ad-tech ecosystems.

Qualifications

• 3+ years in a similar digital role and strong coding in JavaScript, SQL, HTML.
• Experience with ad tagging, tracking scripts, and measurement.
• Familiar with DSPs, Ad Servers, SSPs, CDPs, and DMPs.
• Able to troubleshoot discrepancies in impression, click, conversions.
• Knowledge of UTM parameters, URLs and query strings for campaigns.
• Understanding of RTB mechanics and brand safety technologies.
• Strong communication and problem-solving abilities.

Responsibilities

• Develop scripts, maintain databases, and process data feeds for new client initiatives.
• Integrate clients into the Epsilon system with technical solutions.
• Conceptualize integration strategies for large-scale clients and provide ongoing support.
• Collaborate with cross-functional teams globally across engineering, analytics, product and sales.
• Troubleshoot issues and drive them to resolution.

Skills

3+ years experience

digital ad tagging

tracking scripts & pixels

DSPs

Ad Servers

SSPs

CDPs

DMPs

troubleshooting data

UTM parameters

URL structures

RTB mechanics

brand safety

problem-solving

communication skills

JavaScript

SQL

HTML

team collaboration

Education

Bachelor’s degree in computer science or MIS

Tools

PHP

Shell

Python

Job description

Epsilon, part of Publicis Groupe, seeks a Client Integration Engineer in London. You will develop scripts, maintain data feeds, and integrate clients into the Epsilon platform, acting as a hybrid web technologist and solutions architect.

You’ll collaborate across engineering, analytics, product, and sales to deliver scalable, data-driven solutions. Ideal candidates have 3+ years in a similar digital role, with expertise in JavaScript, SQL, HTML, and ad-tech ecosystems.