Senior App Developer

Zenzero is one of the UK's fastest-growing technology companies. Named a Top 8 Technology Company at the British Business Awards 2026, recognised by Deloitte as a Best Managed Company, and in the Sunday Times Hundred (an annual ranking of the UK's fastest-growing private companies) in both 2025 and 2026, we hold Microsoft Solutions Partner status across all six designations, putting us in the top tier of UK Microsoft partners. The accolades reflect something real: a business that is scaling fast, executing well, and building something that lasts. We're on a mission to make technology genuinely work for mid-market businesses, covering managed IT, cyber security, cloud, and AI solutions that actually move the needle. The demand is growing, and so are we. We're also a certified B Corp and Scale Up Award winner. That combination matters to us: high growth and high standards aren't in conflict here. Fast growth, high standards, real impact. If that sounds like your kind of place, keep reading. About the Role We are looking for a Senior Mobile Developer to lead the design, development and delivery of mobile and cross-platform applications within our DDS team. As the primary technical authority for app development, you will work directly with clients and internal stakeholders to understand requirements, shape technical decisions and deliver effective solutions. This is an opportunity to combine hands-on Flutter and Dart development with technical leadership. You will modernise legacy application codebases where required, contribute to architecture and planning, and help junior and mid-level developers strengthen their app development practice.Responsibilities