Fractional CTO: Lead AI Production Platform (Remote)

Rent a Recruiter; Ireland; Remote; EUR 148,000 - 258,000; Part time

Benefits offered by this job

Equity potential

Remote work

Job summary

Rent a Recruiter is assisting a client developing an agentic operating system for global trade and seeks an exceptional technical leader to productionize its AI agent infrastructure. The fractional CTO will own technical direction, architecture, and delivery, focusing on scalable, secure production systems.

You will work with founders to shape the engineering roadmap, build durable agent workflows and ensure governance, security, and observability across a multi-tenant SaaS platform.

Qualifications

• Proven track record of shipping LLM-powered systems into production.
• Hands-on experience with LLM tool use, agents, retrieval, evaluation frameworks and failure handling.
• Practical experience fine-tuning models using LoRA, SFT and DPO.
• Experience with Unsloth and NVIDIA NeMo, including serving fine-tuned models through NVIDIA NIM.

Responsibilities

• Own the technical direction and architecture of the platform.
• Define the engineering roadmap in collaboration with the founders.
• Establish technical standards, development practices and production readiness criteria.
• Build a scalable platform architecture supporting multiple customers, partners and workflows.
• Lead the transition of AI agents from tested builds into production systems.
• Design and implement durable, long-running agents capable of managing workflows over extended periods.
• Build agent capabilities including retries, state management, resumption after responses and dynamic re-planning.
• Develop tool-use capabilities, retrieval systems, multi-model routing and agent orchestration.
• Establish robust evaluation frameworks and release gates for model-driven features.
• Embed security and governance into the agent architecture.
• Implement scoped data access, least-privilege permissions and prompt-injection defences.
• Ensure agent-generated commercial proposals and actions require appropriate human approval.
• Maintain audit trails of agent activity, data access and actions.
• Establish observability, reliability and incident management practices.
• Own the development of a secure, multi-tenant SaaS platform.
• Define APIs, data models, integrations and platform extension points.
• Establish CI/CD, automated testing, monitoring and rollback processes.
• Manage performance, infrastructure costs and latency budgets at workspace level.
• Establish engineering organisation and development processes as the business scales.
• Recruit, lead and mentor a small engineering team as funding allows.

Skills

LLM systems

Agent workflows

AI governance

Production engineering

Tools

LoRA fine-tuning

NVIDIA NeMo

NIM serving

PostgreSQL

Supabase

REST APIs

GraphQL

Node.js

Python

React

Next.js

Job description

Rent a Recruiter is assisting a client developing an agentic operating system for global trade and seeks an exceptional technical leader to productionize its AI agent infrastructure. The fractional CTO will own technical direction, architecture, and delivery, focusing on scalable, secure production systems.

You will work with founders to shape the engineering roadmap, build durable agent workflows and ensure governance, security, and observability across a multi-tenant SaaS platform.