Job Opportunities API

About WPP Production We are WPP Production - the unified global production company that brings together all of WPP's content producers, studios and craft experts into one connected organisation. We combine world-class human craft with next generation technology to originate, design, and deliver multi-channel content systems at scale. Built for borderless collaboration and powered by deep craft expertise, we are the production engine designed for today's always on, AI driven marketing world. About WPP WPP is the trusted growth partner for the world’s leading brands. We unite cutting-edge media intelligence and data solutions, world-class creativity, next-generation production, transformative enterprise solutions and expert strategic counsel in a single company – powered by exceptional talent and our agentic marketing platform, WPP Open, to help our clients navigate change, capture opportunity and deliver transformational growth. For more information, visit  WPP.com . The Role We are looking for a  Freelance Developer to join our team and help deliver high-quality, scalable digital advertising experiences. In this role, you will develop, implement, and optimize dynamic creative campaigns across multiple ad serving and DCO platforms. You will work closely with Account, Project Management, Creative, and Media teams to transform campaign strategies into technical solutions, ensuring flawless execution, quality assurance, and continuous improvement. Responsibilities Campaign Execution Develop and maintain responsive HTML5/CSS3/JavaScript banners, animations (e.g., CSS and GSAP), and modular templates for Dynamic Creative Optimization (DCO). Implement dynamic variables, business rules, and data feeds (CSV, JSON, XML, Google Sheets) to enable personalized campaigns at scale. Prepare publication packages, including naming conventions, packaging, tags, clickTags, and polite loading implementation. Upload and traffic creative assets and dynamic campaigns across DCO and ad serving platforms according to client technology stacks. Collaboration & Operations Partner with Account, Project Management, and Client teams, as well as media agencies, to translate addressable marketing strategies into clear technical requirements. Support the definition of technical ways of working for new client accounts, including staging environments, repositories, and approval workflows. Estimate development effort and timelines while proactively identifying technical risks and limitations. Quality Assurance & Launch Perform functional and visual QA across multiple creative variations, browsers, devices, and screen sizes. Validate tracking integrations (click, impression, and interaction tracking), brand safety requirements, and platform compliance. Provide QA documentation, including variation checklists, screenshots, and screen recordings when required. Documentation & Technical Support Create and maintain technical documentation, template functionality guides, and internal implementation documentation. Provide technical support to Project Management and Creative teams during automation RFPs, including feasibility assessments, technical inputs, and scope definition. Assist with the onboarding of new platforms and tools by supporting initial setup and proof-of-concept implementations. Continuous Improvement Promote and implement best practices for performance optimization, accessibility, naming conventions, and version control. Contribute to the evaluation of new third-party advertising solutions across display, social, and video channels through proof-of-concept projects. Qualifications Required 3–5 years of experience developing HTML5 banners and dynamic creative solutions for paid media campaigns. Strong proficiency in HTML5, CSS3, and vanilla JavaScript, with experience using CSS and GSAP for animations, as well as sprite and