Senior AI Engineer - Founding Team

Senior AI Engineer (Founding Team)

Remote (US) – NYC Preferred

$175,000 – $200,000 Base + Equity

THE COMPANY

Harnham is partnering with a venture-backed, early-stage AI startup building an agentic AI operating system for the advertising and marketing industry. Having recently completed a successful Series A funding round, the company is entering a rapid growth phase and is focused on developing foundational AI infrastructure that enables intelligent workflows, agent orchestration, and large-scale production AI systems.

Rather than layering AI onto existing software, the organization is building AI-native products from the ground up. With a lean team of approximately ~30 employees and a highly collaborative engineering culture, this is an opportunity to work directly alongside founders and technical leadership to define the future of AI-powered workflow automation.

RESPONSIBILITIES

• Build and deploy production-grade AI features from concept through implementation and launch.
• Design and develop agentic AI workflows, orchestration frameworks, and intelligent automation systems.
• Create AI-powered applications that solve complex advertising and marketing challenges.
• Optimize model performance, latency, reliability, and operational costs across production environments.
• Collaborate closely with Product and Customer Success teams to validate business impact and customer outcomes.
• Own features end-to-end, from architecture and development through deployment and ongoing optimization.
• Contribute to platform architecture, engineering standards, and technical best practices.
• Help shape the long-term direction of the company’s AI infrastructure and product strategy.

SKILLS AND EXPERIENCE

• Strong software engineering background with experience building and shipping production AI applications.
• Hands-on experience developing LLM-powered applications in production environments.
• Experience designing and implementing agentic AI systems and workflow orchestration frameworks.
• Proficiency with LangChain or comparable orchestration technologies.
• Demonstrated experience owning customer-facing products from development through deployment.
• Strong software engineering fundamentals, including application architecture, testing, and scalability.
• Comfort operating in fast-paced startup environments with high ownership and ambiguity.
• Product-oriented mindset focused on measurable customer and business outcomes.
• Ability to work across the technology stack and contribute wherever needed.

PREFERRED EXPERIENCE

• Experience with multi-agent systems and advanced orchestration architectures.
• Knowledge of Retrieval-Augmented Generation (RAG) systems.
• Experience implementing AI evaluation and testing frameworks.
• Prompt engineering expertise.
• Background in marketing, advertising technology, or related industries.
• Experience with MLOps, LLMOps, and cloud-native infrastructure.
• Exposure to vector databases and large-scale AI platform architectures.

BENEFITS

The compensation package includes a competitive base salary, meaningful equity participation, and the opportunity to join a high-growth AI startup at an early stage. This role offers significant ownership, direct access to founders and engineering leadership, and the chance to help define the future of production-grade agentic AI systems.

HOW TO APPLY

Please submit your CV via the Apply link on this page to register your interest.

KEY TERMS

Artificial Intelligence Agentic AI AI Agents Large Language Models LLMs LangChain Workflow Automation Multi-Agent Systems RAG Prompt Engineering MLOps LLMOps Production AI Software Engineering Startup Marketing Technology Advertising Technology Full Stack Engineering AI Infrastructure Machine Learning Founding Engineer Generative AI Automation Platforms Cloud Infrastructure