Senior Data Visualisation Developer

Dentsu; City of Westminster; Hybrid; GBP 50,000 - 70,000; Full time

Job summary

A global marketing agency is seeking a Senior Data Visualisation Developer to deliver client solutions with a focus on technical and interpersonal skills. The role involves developing reporting solutions, managing client expectations, and mentoring analysts. Flexible hybrid working arrangements are available. Ideal candidates will have extensive experience in client-facing roles and mastery of tools like Power BI and Tableau.

Benefits

Great compensation package

Private health & dental insurance

29+ days of annual leave

Career development opportunities

Qualifications

• 5+ years in a data/reporting analyst role, preferably in an agency or consultancy.
• Advanced proficiency in reporting tools, SQL, and Excel.
• Strong problem-solving skills to translate data into actionable insights.

Responsibilities

• Develop, manage, and optimize reporting solutions for client accounts.
• Create dashboards using tools like Power BI and Tableau.
• Train and mentor junior analysts.

Skills

Data analysis

SQL

Power BI

Tableau

Excel

Job description

A senior level data visualisation developer to work on a variety of client solutions. The role will benefit from a mix of both strong technical and interpersonal skills as the role requires independent end to end delivery. This is a rewarding opportunity to work with an innovative organisation in a growing team. Exposure will go beyond technology and focus on outcome driven solution implementation, in an array of verticals. While the position is in the data visualisation practice, it will offer regular exposure to all areas of the business by sheer virtue of the role. The developer will serve both internal and external customers and therefore be client facing.

What you’ll do

• Develop, manage, and optimize reporting solutions for client accounts, ensuring accuracy, consistency, and timely delivery
• Create dashboards and reports using tools like Power BI, Tableau, or other relevant analytics platforms
• Interpret complex datasets to produce clear, meaningful reports tailored to client needs
• Act as the key reporting contact for clients, ensuring expectations are met and exceeded
• Project manage the BI element of wider projects using collaboration tools such as Jira, Workfront whilst keeping the client informed and engaged throughout the iterative development cycle
• Collaborate with internal teams (account management, data, and strategy teams) to align reporting outputs with business objectives
• Train and mentor junior analysts, sharing best practices and fostering a data-driven culture
• Support the sales process by demonstrating how technology and process tackle MI and BI challenges

Qualifications

• 5+ years in a data/reporting analyst role, preferably in an agency, consultancy, or client-facing environment
• Advanced proficiency in reporting tools (Power BI, Tableau, Qlik), SQL, and Excel
• Strong problem‑solving skills with the ability to translate data into actionable insights
• Excellent presentation and storytelling skills, with the ability to simplify complex data topics for diverse audiences
• Ability to manage multiple client accounts and meet deadlines efficiently
• Knowledge of industry metrics: familiarity with key performance indicators (KPIs) in marketing, finance, or other relevant industries
• Familiarity with an array of project management techniques

Company Overview

Merkle, a Dentsu company, powers the experience economy. For more than 35 years, we have put people at the heart of our approach to digital business transformation. As the only integrated experience consultancy in the world with a heritage in data science and performance, Merkle delivers holistic experiences that support growth, engagement, and loyalty. Merkle’s expertise has earned recognition as a “Leader” by top industry analyst firms in categories such as digital transformation and commerce, experience design, engineering and technology integration, digital marketing, data science, CRM and loyalty, and customer data management. With more than 16,000 employees, Merkle operates in 30+ countries throughout the Americas, EMEA, and APAC.

Benefits

• Great compensation package, private health & dental insurance, corporate discounts and career development through Dentsu University, and free access to LinkedIn Learning
• 29+ days of annual leave (25 days of regular holidays, birthdays off and 3 additional wellness days)
• Opportunity to volunteer for up to 2 days per year and agency close down between Christmas and New Years
• Hybrid working schedule, with flexible start/end hours

Culture & Inclusion

Our diverse and inclusive culture enables our employees to bring their whole selves to work and be proud of doing so. For us, this is the foundation for great innovation which, in turn, generates better outcomes for our people, partners and communities. This is why we encourage applications from people with disabilities, and of all ages, nationalities, backgrounds and cultures. We are happy to discuss flexible and agile approaches to working for all our roles – we can’t promise we will be able to offer you everything you want or need but we do promise to discuss it with you openly and honestly. If you have any reasonable adjustment needs arising from a disability or medical condition to fully participate in the recruitment process, please discuss this with our recruitment teams.

#LI-Hybrid