Note: The job is a remote job and is open to candidates in USA. Harnham is a fast-growing, remote-first technology business building innovative tools used by product and engineering teams globally. The Senior AI Platform Engineer will shape the foundations of an AI-driven platform, focusing on building production-grade AI capabilities and ensuring reliability and scalability in their systems.

Responsibilities

• 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

Skills

• 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

Benefits

• 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

Company Overview