I co-founded and operate Breezy Keys in Tampa Bay, an Airbnb Superhost across 5 properties. I built the internal tools behind guest communication, pricing and maintenance.
TypeScript, React, Next.js, OpenAI
- AI Developer
- AI Engineer
- Data Engineer
- +2
Julissa Cotillo
- Clearwater, United States
- 4 projects
I'm a software and AI engineer with about ten years of full-stack production experience, building systems that connect LLMs, agent workflows and real user communication. I co-founded Practical Works, a small AI studio.
About
I’m a software and AI engineer with about ten years of full-stack production experience, building systems that connect LLMs, agent workflows and real user communication.
I co-founded Practical Works, a small AI studio. There I built our AI engineering platform in TypeScript, where people and coding agents work from one board and nothing merges without a human sign-off, and led a secure, auditable 8-week AI pilot for a startup client on read-only Salesforce and Business Central sandboxes.
Before that I was a Senior Software Engineer on Polly’s AI team, shipping RAG pipelines, agent workflows, LLM routing and voice AI integrations to enterprise customers. Earlier roles at QuickNode, VitalSource and Kipu Health were mostly Rails; today I work mostly in TypeScript.
I also co-founded Breezy Keys, a Tampa Bay short-term rental company, and built the tools that run its guest communication, pricing and maintenance. Bilingual in English and Spanish, fully remote.
- Joined November 2026
Skills· 16
Languages
- EnglishFluent
- Spanish; CastilianAdvanced
- PortugueseBeginner
Industry experience
- Software & Internet
- Computers & Electronics
- Professional Services
- Media & Entertainment
Projects · 4
Scoped a startup client’s broad AI-operations vision into an auditable pilot: one persona, two read-only systems (Salesforce and Business Central sandboxes), tenant isolation, an append-only audit log, and AI answers that cite only the records they read. Built by our studio on staging with sandbox data. I led the AI layer, the slice spec and the architecture decision record.
TypeScript, Supabase, Salesforce, Business Central
- AI Developer
- AI Engineer
- Data Engineer
- +2
The platform our studio builds on. People and coding agents work from one board under one set of rules. Every change is reviewed and tested before it ships, a person signs off on every merge, and clients can follow progress milestone by milestone.
TypeScript, Node.js
- AI Developer
- AI Engineer
- Data Engineer
- +2
Reads several connected Gmail inboxes on a schedule. Claude classifies each message and drafts replies. A person approves every reply before it sends. Postgres is the source of truth, with durable background jobs, a shared do-not-mail list and claim-based sends so a retry never mails someone twice. Running in production.
TypeScript, Node.js, PostgreSQL, Claude API
- AI Developer
- AI Engineer
- Data Engineer
- +2
Work experience· 6 roles
Co-Founder & AI Engineer · Practical WorksJan 2026 – Present · 11 mos
Built the studio's internal AI engineering platform in TypeScript, where people and autonomous coding agents work from one board under one shared set of rules. Built the review and merge pipeline: a coding agent reviews every pull request across our internal and client repos, and nothing merges without a human sign-off, green CI and a deploy check. Scoped a startup client's AI-operations vision into a secure, auditable 8-week pilot: two read-only systems (Salesforce and Business Central sandboxes), tenant isolation, an append-only audit log, and AI answers that cite only the records they read.
Senior Software Engineer, AI Team · PollyOct 2024 – Jan 2026 · 1 yr 4 mos
Built AI systems on real-time text streaming, retrieval-augmented generation (RAG) and agentic workflows. Developed LLM routing that improved accuracy and performance in production, and built Vue 3 and TypeScript components for AI citation transparency on enterprise-scale RAG pipelines. Implemented cross-platform voice AI integration and testing frameworks, working with design and analytics to ship production AI features.
Co-Founder & Operator · Breezy KeysOct 2023 – Present · 3 yrs 2 mos
Co-founded and operate a Tampa Bay short-term rental company: Airbnb Superhost across a 5-property portfolio. Built the internal tools that run guest communication, pricing and maintenance, in TypeScript, React and Next.js.
Software Engineer · QuickNodeJul 2022 – Oct 2023 · 1 yr 4 mos
Senior Software Engineer · VitalSourceJun 2017 – Mar 2022 · 4 yrs 10 mos
Software Engineer · Kipu HealthMay 2015 – Oct 2016 · 1 yr 6 mos
Education
B.A. (Economics & International Relations), Cum Laude · Boston University2010 – 2014
Data Engineering Certificate · Correlation One / DS4A2023
Certifications and awards
GenAI: Building AI Agents2023 – 2026
Climate Change AI Summer School2024 – 2026
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