AI Platform Engineer

Harnham

AI EngineerseniorLondon Area, United KingdomremotefulltimeSoftware DevelopmentLLMsagent frameworksbackend engineeringsystem designretrieval systemsAPI designJavaScriptobservabilityposted 27 Jul
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Senior AI Platform Engineer £100,000 - £130,0000 Remote This is a unique opportunity to shape the foundations of an AI-driven platform at an early stage. You will focus on building production-grade AI capabilities rather than experimental prototypes, working on systems that prioritise reliability, scalability, and real-world impact. The role combines strong engineering fundamentals with cutting-edge AI development, giving you genuine ownership and visible influence across the product. The Company They are a fast-growing, remote-first technology business building innovative tools used by product and engineering teams globally. With a collaborative and experimentation-led culture, they place strong emphasis on quality, user experience, and responsible AI development. Their environment encourages autonomy, continuous learning, and cross-functional collaboration. As they scale, they are investing heavily in AI to enhance their core platform and deliver tangible value to users. The Role * Design and build AI-powered features with a focus on reliability and production readiness * Develop agent workflows interacting with structured data and knowledge systems * Build scalable retrieval systems across complex, versioned datasets * Implement guardrails, observability, and evaluation frameworks for AI systems * Design APIs and integrations with external tools and platforms * Collaborate closely with product and design to deliver end-to-end features * Contribute to technical direction, roadmap planning, and engineering best practices Your Skills and Experience * Strong commercial experience in backend engineering and system design * Proven track record of delivering AI or machine learning features into production * Experience working with LLMs, agent frameworks, or AI-powered workflows * Solid programming experience including JavaScript and modern frontend frameworks * Experience designing and building APIs and distributed systems * Understanding of observability, scalability, and reliable architecture * Comfortable working in fast-paced, product-focused environments What They Offer * Competitive salary between £100,000 and £130,000 plus equity * Fully remote working with flexible hours * High level of ownership and autonomy across features * Dedicated time for learning and experimentation * Strong focus on quality engineering and user experience * Clear opportunity to influence product direction and grow your career How to Apply If you are interested in building impactful AI systems in a high-ownership environment, apply now to find out more. Please note we cannot offer sponsorship for this position.