Job Title: Senior Developer – CRM & Panel Member App

Location: Spain, Madrid

Employment Type: Permanent

Area: IT – Development

This full‑time permanent position is based in our Madrid office. We operate on a hybrid working arrangement and require a minimum of 2 days in the office. We welcome all applications from those with the legal right to live and work permanently in the EU.

Overview

Fifty5Blue is undergoing a major transformation of its Audience operations. We are redesigning our global operating model and processes, enabled by the rollout of a new global CRM platform (Microsoft Dynamics 365 – Customer Service and Field Service) and a panellist‑facing application (the Panel Member App, PMA). This programme will reshape how we engage, manage, and scale our panel community, improving data integrity, operational efficiency, and overall panel member experience.

Key Responsibilities

• Provide L2/L3 technical support...