We''re partnering with a fast-growing sports/entertainment business looking to hire a Senior Backend Engineer on a 6-month contract (outside IR35), with potential to convert to permanent (£95k). This is a hands-on tech lead role with ownership of core platform systems powering multiple websites and internal services. The Role You''ll take full technical ownership of the NextGen CMS and Master Data (MDM) systems, designing, developing, and mentoring a small team of engineers. This role is perfect for someone who thrives in complex, high-scale environments and wants real impact from day one. Key Responsibilities: Lead development across CMS and MDM systems Maintain and expand complex backend systems (not standard CMS) Mentor engineers and set engineering standards/patterns Drive architecture, integrations, and system scalability Work closely with stakeholders to deliver features and improvements Team Environment: 5 Backend, 3 Frontend engineers, 1 Delivery Manager Supported by 1 Architect; Product hire joining soon Distributed across UK and Poland; hybrid working with optional Holborn office Required Skills and Experience Node.js and TypeScript in production systems AWS or other cloud at scale Experience owning large, complex backend systems Proven mentorship or tech lead experience Strong system design and architecture experience Integration-heavy environments Nice-to-Have: Experience with high-scale platforms (gaming, sports, fintech, marketplaces) DevO