Location: Hybrid - UKContract Type: PermanentHours: Full timeSalary: CompetitiveCOMPANY OVERVIEWMOBKOI is a fast-growing mobile company headquartered in London, with offices across central Europe, US and Asia. We use the latest in mobile ad technology to help premium brands effectively reach and engage with their clients'' audiences.Bringing to market the most selective site list of premium global and local publishers enabling brands to be selective of where their ads are going to run and thus ensuring brand safety. MOBKOI prides itself on offering full transparency, bespoke creative builds and local market coordination. We are part of The Brandtech Group, formerly known as You and Mr Jones, working with partners developing the best technology across the globe.ROLE OVERVIEWAs a Backend Software Engineer (Junior-Mid Level) - Programmatic, you will contribute to the development and evolution of MOBKOI''s programmatic advertising platform. You will work closely with experienced engineers on backend systems that power real-time bidding (RTB), campaign delivery, and large-scale integrations with SSPs and DSPs.This role is well suited to engineers early in their career who want to deepen their expertise in distributed systems, low-latency services, and cloud-based infrastructure, while gaining exposure to the programmatic advertising ecosystem. You will be supported through mentorship, code reviews, and progressive ownership of backend components.RESPONSIBILITIES• Contribute to the