Available for contract work · remote or South Florida
Web funnels that hold up under traffic. AI agents that answer the phone.
I'm Jesus Vasquez, a full-stack engineer in South Florida. Front end to back end, in English and Spanish, through my own studio, 27 Colab LLC.
- Fact
- 4 yrson a pet insurer's quote-and-purchase funnel, marketing site and member app, US and Canada
- Fact
- Livebilingual AI phone receptionist answering a brokerage's main line since April 2026
- Fact
- 7 yrsas sole developer of a senior-living wellness platform, still in production
- Fact
- 6MIT libraries, each written up with the bug that produced it
Selected work
All workSpot Pet Insurance
Four years inside a regulated, revenue-critical web funnel
Core front-end engineer on a pet insurer's quote funnel, marketing site and member app for the United States and Canada.
- Next.js
- React
- TypeScript
- React Native
- Contentful
A Miami commercial real-estate brokerage
A phone line that answers in English or Spanish, knows the listings, and writes the lead to the CRM
A real-time voice agent for a Miami commercial real-estate brokerage, in production since April 2026, with SMS, email and Instagram agents around it.
- TypeScript
- Node.js
- Twilio Media Streams
- Deepgram
- ElevenLabs
A senior-living wellness platform
A content product for older adults, designed on paper and still in production seven years later
Sole developer of a healthy-ageing content platform for retirement communities since 2019: UX, WordPress application, recommendations, analytics.
- WordPress (PHP)
- Gravity Forms
- REST API
- MySQL
- JavaScript
Open source, with the bug behind each
All sixSix small TypeScript libraries extracted from the projects above. Each page opens with how it went wrong first, then what the library does, what you still have to bring, and how to run it.
Turn-taking for phone agents
voice-engine
A WebSocket-based AI phone agent that sounds human.
SMS consent, STOP and one send gate
sms-consent
An SMS agent that only texts people who said yes.
Email for agents: send once, tell the truth
email-kit
An email agent that sends once, and tells the truth.
Instagram DMs on the official API
instagram-dm
An Instagram DM auto-reply agent, built on Meta's official API.
Florida parcels from a typed address
fl-parcel-lookup
A Florida property-records lookup: address in, folio and legal description out.
QuickBooks Online without dead tokens
quickbooks-online-kit
A QuickBooks Online sync engine that keeps its connection alive.
How I work
Evidence over adjectives
Every claim on this site points at a page, a repository or a resume. Where I have not proven something, the page says so.
Guardrails in code
Whatever an AI model may do, the things that must not happen twice (a send, an invoice, a text to someone who said STOP) are enforced in code and tested offline.
The unglamorous layers
Accessibility, performance, SEO, analytics, consent and end-to-end tests are part of the build, not a follow-up phase.
More about me, skills and four resumes on the About page.
Have a project in mind?
A few lines about what you need is enough to start. I reply within a day, in English or Spanish.