Staff Backend Engineer | AI-Powered SaaS | London (Hybrid) We’re partnered with a top-ranked AI SaaS company backed by leading AI pioneers and a $30M Series A. Their platform is transforming no-code AI workflows and powering Fortune 500 enterprises worldwide. The Role As a Staff Backend Engineer, you'll play a critical role in scaling an AI-first platform, enabling foundation models like Gemini Pro to analyze multimodal data at scale. You'll work closely with the founders and engineering leadership to design robust, high-performance architectures that drive AI adoption at enterprise levels. Responsibilities Architect and scale backend systems for multi-tenant AI applications. Maintain and expand highly performant APIs for internal and B2B clients. Build and optimize infrastructure using AWS, Terraform, and Docker. Ensure observability and efficient queue management. Ship to production multiple times a day, solving real-world user challenges. Your Experience 5 years of backend development experience with strong architectural skills. Experience with functional programming (Elixir, Scala, Go, Node.js, Haskell, etc.). Cloud infrastructure expertise (AWS, Terraform) with experience at scale. Deep understanding of distributed systems, orchestration, and observability. Knowledge of GenAI and prompt engineering is a plus. Passion for early-stage startups, small-team collaboration, and a customer-centric mindset. Perks & Benefits Top 15% equity options plan Private healthcare & pension contribution 30 days holiday bank holidays (plus 1 extra day per year of service) £800 L&D budget conference sponsorship (NeurIPS, CVPR, etc.) Company-wide retreats & flexible hybrid working Work from anywhere for 1 month per year If you’re a backend specialist who thrives in high-impact product focused environments, apply today!