Backend Engineer

Backend Engineer | Agentic Platforms Up to £80,000 + Benefits London, UK | Hybrid | 3 days a week We're partnering with a forward-thinking technology business to hire a Backend Engineer into a growing AI engineering function at the heart of a market-leading consumer platform. The business is actively embedding AI across its engineering workflows and building intelligent, autonomous systems that are shaping how millions of members interact with its product. As a Backend Engineer, you'll play a critical role in designing, building, deploying, and monitoring AI systems that scale across the business. You'll work cross-functionally with product, data, and platform teams, with a "you build it, you run it" mindset, and a passion for AI-driven innovation that goes beyond theory into production-grade systems. What you'll be doing: * Designing, building, and deploying AI systems that scale to millions of users * Collaborating cross-functionally with product, data, and platform teams to ship high-quality software on a frequent release cadence * Owning quality through rigorous automated testing and metrics * Evaluating and selecting the right technical solution for each task, factoring in cost and timelines * Working hands-on with Gen AI tools and ML frameworks to build and optimise systems for performance, scalability, and reliability * Contributing to agentic workflows, including autonomous and multi-agent architectures What we're looking for: * Proficiency in Python or relevant backend technologies * Experience with Gen AI tools (LangGraph, CrewAI, Hugging Face, OpenAI APIs, etc.) and ML frameworks such as PyTorch/TensorFlow * Strong understanding of ML fundamentals (training, evaluation, deployment) and LLM-specific challenges (prompt engineering, latency, cost optimisation) * Experience with cloud platforms (AWS, GCP, Azure) and infrastructure-as-code (Terraform) * Familiarity with DevOps practices (CI/CD, Docker, K8s) and observability tools (Prometheus, Grafana, Datadog) * Experience with distributed systems and scaling, plus multiple datastores (SQL and NoSQL) What's on offer: * Up to £80,000 + Benefits * Hybrid working from a market-leading, tech-driven business * Genuine opportunity to shape AI adoption across a scaling product * Work on systems used by millions of members globally This is an exciting opportunity for a Backend Engineer to join a business where technical growth and people development carry equal weight. If this sounds like the right next move, apply now! *Due to the high volume of applications, not all applicants will receive individual feedback*