Hi, I'm Steve. I build production AI systems.
AI engineer focused on agents, retrieval, evaluation, and the guardrails that make them safe to ship. This site is my portfolio, and everything on it is running code you can try.
Try what I built
The castroai platform is a working product: agents that act with your approval, retrieval with citations, and full tracing. Sign in and put it to work.
GTM
GTM Strategist
Plans launches, sharpens positioning, and turns customer signals into your next campaign.
Social Media
Social Media Manager
Drafts, schedules, and repurposes content across every channel from a single brief.
Sales
Sales Development Rep
Qualifies inbound leads, drafts outreach, and keeps your pipeline moving.
Customer Service
Support Agent
Resolves common tickets instantly and escalates the rest with full context.
Recruiting
Talent Scout
Screens candidates, schedules interviews, and keeps your hiring pipeline warm.
Ops
Ops Analyst
Tracks KPIs across your tools and flags what needs attention before it's a problem.
Case studies and write-ups
Deep dives on how I design, test, and ship AI systems.
castroai
An agent that can publish publicly needs more than a good prompt. How I make the dangerous action structurally hard, test the policy with evals, and watch it in production, including what is still unproven.
castroai
From use-case selection and data foundations to evaluation, security, governance, and rollout: a complete walkthrough of what it takes to build AI systems that hold up in the enterprise.
A practical playbook for turning AI into an always-on GTM strategist — from feeding it the right context to knowing which calls to keep human.
What people say
Kind words from people I have worked with.
“We turned on the GTM and Sales agents in the same afternoon we signed up. Within two weeks our outbound reply rate had doubled and nobody on the team had to learn a new tool.”
Maya Chen
Co-founder & CEO, Northwind Labs
“castroai's support agent handles the first response on almost every ticket now. Our two-person support team finally has room to breathe during launches.”
Daniel Osei
Head of Operations, Fielded
“Having GTM, social, and recruiting agents on one subscription meant we skipped hiring three specialist contractors in our first year.”
Priya Raman
Founder, Loopwork
Hiring, or building something?
Tell me about the role or the problem you're working on. I'd like to hear about it.
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