Senior Data Visualisation Developer

Dentsu Aegis Network; City Of London; Hybrid; GBP 55,000 - 75,000; Full time

Job summary

An innovative analytics firm in London seeks a Senior Data Visualisation Developer to create client solutions. This role requires a mix of strong technical and interpersonal skills, with responsibilities including developing reporting solutions, creating dashboards, and managing client expectations. Ideal candidates will have over 5 years in a relevant role, with proficiency in tools like Power BI and SQL. The position offers a hybrid work model and a comprehensive benefits package.

Benefits

Private health & dental insurance

29+ days of annual leave

Hybrid working schedule

Career development through Dentsu University

Qualifications

• 5+ years in a data/reporting analyst role, preferably in an agency or consultancy.
• Ability to translate data into actionable insights.
• Familiarity with key performance indicators in relevant industries.

Responsibilities

• Develop, manage, and optimize reporting solutions for client accounts.
• Create dashboards and reports using Power BI, Tableau, or other analytics platforms.
• Act as the key reporting contact for clients, ensuring expectations are met.

Skills

Advanced proficiency in reporting tools (Power BI, Tableau, Qlik)

Strong problem-solving skills

Excellent presentation and storytelling skills

Ability to manage multiple client accounts

Knowledge of industry metrics

Tools

SQL

Excel

Job description

Role purpose: 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 across 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.

About the Company

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. For more information, visit www.merkle.com.

What’s the role?

You’ll be 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. The developer will serve both internal and external customers and therefore be client facing.

What you’ll do

• Develop, manage, and optimise 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 and Workfront while 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.

What we are looking for in you

• 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.

A few of the 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 a break between Christmas and New Year.
• Hybrid working schedule, with flexible start/end hours.

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

Location

London

Brand

Merkle

Time Type

Full time

Contract Type

Permanent