Senior/Principal Applied AI Engineer

Harnham; United States; On-site; USD 150,000 - 205,000; Full time

Job summary

Harnham is seeking a Senior/Principal Applied AI Engineer in the United States. The role is hybrid or remote and offers a competitive salary with a 15% bonus and benefits.

You will own end-to-end Generative AI solutions, from prototyping to scalable deployment, impacting customers and internal teams. You will lead the design and deployment of GenAI applications, leveraging LLMs, prompt engineering, and RAG pipelines, and work cross-functionally to deliver production-grade AI capabilities at

Qualifications

• Applied GenAI experience in commercial settings.
• Hands-on with LLMs, prompt engineering, and evaluation.

Responsibilities

• Design, build, and deploy Generative AI applications across client-facing and internal platforms.
• Develop LLM-powered solutions using prompt engineering, vector databases, and Retrieval-Augmented Generation pipelines.
• Build and own AI chatbots and conversational agents to production standards, including performance, scalability, and compliance.
• Create AI agents across digital and voice channels for real-time interactions.
• Deliver proof-of-concept solutions for use cases like document understanding and knowledge assistants.
• Optimize model usage, prompts, and parameters for accuracy, cost, and reliability.
• Collaborate with product, engineering, data, and external partners to align AI with business priorities.

Skills

Python development

GenAI applications

Prompt engineering

LLM evaluation

RAG pipelines

Vector databases

SQL

Cloud data platforms

Production-grade AI

Technical communication

Tools

Vector databases

Cloud data platforms

Job description

Senior/Principal Applied AI Engineer

United States, hybrid or remote. Competitive salary plus benefits.

$150,000 to $205,000 + 15% Bonus

This is an opportunity to take ownership of real, production-grade Generative AI solutions in a highly applied environment. You will work on end-to-end AI delivery, from early prototypes through to scalable deployment, with clear visibility of the impact your work has on customers and internal teams.

The Company

They are a well-established organisation operating in a highly regulated, customer-focused industry. Data and AI are central to their strategy, with significant investment in modern platforms and applied AI capabilities. The business values practical innovation, collaboration, and building technology that delivers measurable outcomes at scale.

The Role

You will be a senior, hands-on contributor within an Applied AI team, responsible for turning GenAI concepts into robust solutions. Key responsibilities include:

• Designing, building, and deploying Generative AI applications across client-facing and internal platforms.
• Developing LLM-powered solutions using prompt engineering, vector databases, and Retrieval-Augmented Generation pipelines.
• Building and owning AI chatbots and conversational agents to production standards, including performance, scalability, and compliance.
• Creating AI agents across digital and voice channels to support real-time interactions.
• Delivering proof-of-concept solutions for use cases such as document understanding, summarisation, and knowledge assistants.
• Optimising model usage, prompts, and parameters to balance accuracy, cost, and reliability.
• Collaborating with product, engineering, data, and external partners to align AI solutions with business priorities.

Your Skills and Experience

You will bring strong, practical experience applying GenAI in commercial settings, including:

• Advanced Python development skills with modern GenAI and machine learning libraries.
• Hands-on experience with large language models, prompt engineering, and LLM evaluation.
• Proven capability building RAG pipelines and working with vector databases.
• Strong SQL skills and experience working with cloud data platforms.
• Experience delivering production-grade conversational AI or chatbot solutions.
• The ability to communicate complex AI concepts clearly to technical and non-technical stakeholders.
• Comfort working in fast-paced, cross-functional environments.

What They Offer

• Competitive salary and comprehensive benefits package.
• The chance to work on high-impact, enterprise-scale AI products.
• Exposure to a wide range of GenAI use cases, including conversational AI and intelligent automation.
• Clear opportunities for technical growth and influence within a growing Data and AI function.
• A collaborative, supportive culture that values continuous improvement and learning.