Open to opportunities

Rubens Aguiar

@rubensaguiar

Message

I build and evaluate production LLM systems, customer operations platforms, and reliable support workflows.

Brazil

Message

What I'm looking for

I'm looking for remote contract work where I can evaluate and operate production AI systems, build safe customer-facing workflows, and improve support operations through practical testing, guardrails, documentation, and measurable outcomes.

I founded Atom and operate a multi-tenant WhatsApp customer service platform, CRM, and AI agents used daily by three companies across Brazil and Portugal. I own the full cycle from client discovery and requirements through architecture, releases, operations, and support.

I evaluate LLM output against real customer messages, using guardrails, scoped agents, adversarial testing, human handoffs, and task-based model routing. After analysing 2,464 customer messages, I chose deterministic order parsing over AI, cutting false alerts by 24% and removing 91 incorrect records per period.

Before Atom, I handled first-line IT support at Pilkington using SAP and Zendesk, diagnosing network and account issues and escalating with documented evidence. I also spent three years in Australian moving and relocation logistics across sales, customer service, operations, Salesforce, HubSpot, and Google Ads.

Experience

Work history, roles, and key accomplishments

Current

AI Systems Specialist

Current

Atom

Jan 2026 - Present (7 months)

Founded and operate a multi-tenant WhatsApp customer service platform, CRM, and AI agents in production for three companies across Brazil and Portugal. Responsible for model evaluation, guardrails, and full-cycle ownership from discovery to support.