Senior Backend EngineerSalary: 120K - 140K + EquityLocation: London in officeData Idols are working with a rapidly scaling software company who are looking for a Senior Backend Engineer to join their team. The product sits at the intersection of AI systems, complex data workflows, and enterprise-grade reliability, turning sophisticated technology into tools that can be trusted in production.The OpportunityThis role is about building serious backend infrastructure for AI systems that operate in real-world, high-stakes environments.You''ll be responsible for designing and evolving the backend services that support large-scale data processing, AI model deployment, and secure enterprise workflows. Your work will ensure that complex AI functionality is delivered reliably, performs under load, and meets strict security and compliance expectations.You''ll collaborate closely with machine learning engineers, product managers, and infrastructure specialists to turn advanced AI capabilities into production-ready systems. Alongside hands-on delivery, you''ll influence architectural decisions, guide technical standards, and help shape how backend engineering is done as the platform scales.This is a role for someone who enjoys ownership, depth, and solving hard systems problems.Skills and experienceStrong expertise in Python and modern backend frameworksDeep knowledge of relational databases, particularly PostgreSQLStrong understanding of RESTful API design and microservices patternsExper