Castus

Castus builds custom applications and e-commerce systems for organisations with needs that off-the-shelf software doesn't cover. Its portfolio includes a bespoke cruise management system, an inventory management system, an e-commerce and order management platform, a training management system, a student accommodation search engine, and subscription and e-commerce builds — spanning industries from travel to education.

Work covers application development, systems integration, e-commerce development, UX research and heuristics, data engineering pipelines, performance engineering, web development, and ongoing maintenance and support. The 27-strong team handles projects from initial build through to the performance tuning and data services that keep systems running once they're live, and the agency holds Cyber Essentials Plus accreditation.

Founded in 2007, Castus has spent 18 years delivering projects in more than 30 countries, working across sectors where bespoke systems — rather than off-the-shelf products — solve the underlying business problem.