Principal Developer - Mendix

About the Team:  Enterprise Systems is the backbone of GSK’s internal operations in Digital & Tech, enabling GSK Global Functions teams such as Finance, Procurement, HR, Legal, Compliance, (Workplace & Real Estate Facilities) WREF, (Communications & Government Affairs) CGA and Corporate Secretariat to run seamlessly. This team designs and delivers cutting-edge digital platforms that power critical processes, ensuring efficiency, compliance, and scalability across the enterprise. Enterprise Systems Management & Business Operations delivers digital solutions that support Enterprise Systems running as a high-performing organisation. This team drives financial discipline, operational rigour and strategic alignment across the ES (Enterprise Systems) portfolio that safeguard GSK’s integrity and reputation globally. By joining this team, you’ll help shape systems that support thousands of employees worldwide, driving innovation and reliability in the tools that keep GSK moving forward. Job Purpose: The Principal Developer Mendix designs, develops, tests, and supports (Manufacturing Execution System) MES solutions using Mendix. The role translates business and manufacturing requirements into reliable, secure, and compliant system solutions, including configurations, databases, integrations, and custom applications. The role supports troubleshooting of complex technical issues, uses approved AI-assisted development tools to improve efficiency, and ensures all solutions meet quality, security, data integrity, and (Good Practice) GxP requirements. The Principal Developer Mendix also promotes standardization, reusable solutions, and best practices across MES platforms and teams.  Key Responsibilities: Design, develop, and maintain applications using the Mendix low-code platform.  Create and optimize microflows, nanoflows, and business logic to support business processes.  Design, develop, and maintain domain models, entities, associations, data management structures, and responsive, user-friendly pages, layouts, and widgets for web and mobile applications. Integrate Mendix applications with (Representational State Transfer Application Programming Interfaces) REST APIs, (Simple Object Access Protocol) SOAP services, databases, and enterprise systems.  Configure and manage application security, user roles, authentication, and authorization while performing testing, debugging, troubleshooting, and performance optimization to ensure secure, reliable, and efficient application performance. Utilize Mendix Studio Pro, version control, and deployment pipelines to support the application lifecycle.  Support application deployment, monitoring, maintenance, and upgrades across environments.  Prepare technical documentation and mentor junior Mendix developers on best practices.  Collaborate with business stakeholders, business users, project teams, and vendors to translate requirements into scalable Mendix solutions and successfully deliver MES projects.