Job Description

Business Unit Customer Science: We help brands to get a deeper understanding of their customers and uncover opportunities for more personalised experiences. Team Analytics Reporting to Head of Tracking & Measurement Location London/Hybrid – 2 days in office minimum

ABOUT:

GAIN is a creative-led, insight-driven company that blends data, tech and creativity. We believe the best ideas emerge where intelligence and creativity unite, where insight sparks imagination, and where innovation turns possibility into progress.

We are explorers of new frontiers, shaping bold strategies that move people, brands, and businesses forward. Individually and together, our specialist teams provide the vision, data, and confidence brands and organisations need to make braver, more impactful decisions.

Today as GAIN, we work as a united force, using data to fuel creativity, and technology to unlock new possibilities. As imagineers we don’t just embrace innovation – we engineer it, transforming information into action, and ideas into breakthroughs.

This is where rebel thinking, smart technology, and data-driven creativity shape the future. Through our five specialist teams: Creative Studio, Conversion, Customer Science, Experience and Performance. Individually, and together, we work to fuel your growth, and deliver measurable impact.

THE ROLE:

We are seeking a tag management specialist to join our Data and Analytics team. The candidate will lead a team of tracking / tag management specialists, ensuring tracking projects are delivered accurately, on time, and in line with client objectives.

Working closely with their team of tracking engineers, the delivery manager will be responsible for overseeing the design, deployment, and maintenance of web tracking and tag management solutions for a broad range of customers across a variety of industries. They will demonstrate an impeccable attention to detail and deliver highly accurate and reliable tracking solutions across web and app properties.

RESPONSIBILITIES:

Project & Delivery Management

• Scope and estimate tracking and measurement projects.
• Audit and evaluate existing tracking infrastructure, describing and explaining issues in thorough detail through documentation and in client calls.
• Design highly efficient and accurate tracking infrastructure through the creation of detailed measurement plans, and explain these plans to clients (many of which may not have a technical knowledge of tracking solutions.)
• Identify, diagnose, and solve tracking problems across a broad range of platforms.
• Organise and prioritise workloads in coordination with the Project Management team.
• Maintain project plans, delivery schedules, and dependency maps.
• Manage issue escalation and resolution paths.
• Support QA coordination and ensure accurate implementation before sign-off.
• Facilitate handoffs between technical, data, and client teams.
• Work collaboratively with Head of Tracking & Measurement to optimise delivery processes and improve service offering.

Client & Stakeholder Management

• Serve as the primary technical contact for clients, building strong, lasting partnerships
• Lead regular client calls, communicating progress and results.
• Clarify briefs, requirements, and expected outcomes with clients and internal teams.
• Clearly communicate project status, blockers, decisions, and delivery timelines to stakeholders and internal teams.
• Support account growth through excellent service, delivery, and insight.

Documentation & Process

• Produce Statements of Work, technical documentation, and progress reports.
• Document implementation plans, tracking specs, and change requests.
• Maintain structured records of decisions, risks, dependencies, and test outcomes.
• Contribute to process improvement.

Requirements

Essential

• 3 + years experience in a tracking-specific role (agency experience preferred)
• Proven track record of designing, building, maintaining, and evaluating complex tracking solutions across web and app properties via GTM.
• Excellent problem-solving and debugging skills
• Exemplary communication & language skills.
• Comfortable translating technical concepts into business language.
• Strong organisational skills and ability to prioritise under pressure.
• High attention to detail and quality
• Familiarity with digital marketing channels and campaign instrumentation.

Expert-level experience with:

• Google Tag Manager (GTM)
• Google Analytics 4 (GA4)
• Cookie Management Platforms (CMPs)

Advertising pixels, including:

• Meta Ads Pixel (Including CAPI)
• Google Ads conversion & remarketing pixels
• Microsoft UET pixel
• TikTok Pixel
• Klaviyo
• Hubspot Analytics

• Others: Server-side tag management (Stape experience beneficial) & HTML & JavaScript
• Debugging tracking scripts
• Writing custom JavaScript functions to enable tracking functionality.
• Data Layer design
• Consent APIs

Nice to Have

• Google Measurement Protocol & other server-side API technologies.
• Back-end web development
• Firebase tracking
• App development
• GTM Tag Template design
• Adobe Analytics
• BigQuery database setup & management
• BI & reporting experience, e.g. PowerBI, Looker Studio
• Airtable
• Notion

Success Measures

• On-time delivery rate for tracking projects
• Positive client satisfaction & retention feedback
• Effective scope control and minimal unmanaged rework
• Increased utilisation of their team through smooth coordination
• Clear documentation and traceability across projects

HOW YOU’LL WORK:

Constant curiosity You can think critically and understand the data, knowing where you need to take action. You’re analytical with the ability to investigate and resolve

Pushing boundaries You’ll make the most efficient use of technology, suggesting process improvements

The power of our imagination You're a problem solver who goes the extra mile. You’ll know the best approach to take with clients to get results.

Making it happen You’re proactive and you know you can make a difference. You use your sound judgement when making decisions and you take responsibility for your decisions and actions.

Putting people first You’ll build effective relationships with people, internally and externally, understanding both business and client needs.

Benefits

Our benefits for UK employees include:

• Private Medical Insurance
• BUPA Life Assurance
• Income protection
• Employee Assistance Programme
• Cycle to Work salary sacrifice scheme
• Tech & Wearables salary sacrifice scheme
• Octopus EV Scheme
• Discounts and deals on a range of items from hotels, holidays and hormone testing to cinema, gyms and will writing
  

GAIN is an equal opportunities employer and positively encourages applications from suitably qualified and eligible candidates regardless of sex, race, disability, age, sexual orientation, gender reassignment, religion or belief, marital status, or pregnancy and maternity