Senior Full Stack Developer – Contract Position – HIRING ASAP Location: London, 3 days in office per week & 2 days remote per week Start Date: ASAP Duration: 6-9 months (extension after) Daily Rate: £500 - £550 per day outside IR35 Key Responsibilities Delivery?focused development support Join the team on a freelance basis to provide additional senior level development capacity when required Take on more complex or time sensitive development tasks within existing systems, working within established patterns and architectures Deliver well scoped features, integrations, and campaign builds without introducing unnecessary changes to core platform architecture Live support & problem solving Provide experienced development support during campaigns, helping diagnose and resolve issues quickly and pragmatically Assist with troubleshooting production issues, identifying root causes, and implementing safe fixes under the direction of the permanent team Support QA and testing of complex dynamic builds ahead of launch when additional senior oversight is required Collaboration & working relationships Work closely with Creative Technology Director to understand technical constraints, delivery expectations, and priorities Collaborate with permanent Senior and Junior developers, fitting into existing workflows and ways of working Liaise with Production and Creative teams as needed to ensure technical delivery aligns with campaign requirements Required Skills & Experience Strong experience with Laravel (PHP), Linux, AWS, Vue.js, MySQL, and GIT workflows Solid understanding of full stack development, including server-side logic, frontend integration, and data flow Experience working with APIs and real-time data integrations Strong debugging, problem-solving, and production support skills Proven experience as a Senior Full Stack Developer or similar role in a production environment Experience delivering and supporting live systems where reliability and uptime are critical Demonstrable experience working with data driven or dynamic content systems Experience collaborating with creative, production, or multidisciplinary teams Nice to have skills Exposure to DOOH, advertising technology, or creative technology environments is beneficial but not essential