Jegx · Medellín, Colombia · UTC−5
AI-first product engineer.
I turn a business need into a system that works in production. AI writes most of the code; the decisions and the responsibility are mine.
Open to remote work
About
I have built software since 2024: I started by automating tasks for Recover, and today I am its lead developer. For the last 9 months I have done it every day with Claude Code as my main tool. I do not write every line by hand and I do not hide it: my job is everything around the code. I work out what the business needs, decide the architecture, direct the implementation, review and test what ships, and keep it running once customers are paying.
What I care about most is measuring. When a model, a vendor or an architecture has to be chosen, I test it on real data first and decide second.
Measured, not promised
Every figure comes from a measurement of my own. Where the method can be published, it is.
Recover · AI sales agent
I replayed 30 real WhatsApp conversations through each model, with the same tools and the same price verifier. Two judges from different vendors graded blind.
Read the full case studyCost per reply12.6× less
previous model, in production
Claude Haiku 5.5, in the benchmark
Quality from two blind judges (1–10)
DeepSeek V3.1
Claude Haiku 5.5
Time to reply (median)2.9× faster
DeepSeek V3.1
Claude Haiku 5.5
NEMO · personal memory
With no new dependencies: float32 vectors, a 1-bit-per-dimension sketch for the first pass and the exact cosine for the 100 finalists only.
Time per query68.9× faster
vectors stored as JSON
binary sketch + exact cosine
Recall@10 against exact search
92.7%
measured on 15 real queries
PRISMA · content for creators
Edited episode, clips, subtitles, thumbnails and a scheduled YouTube upload. It runs on Cloudflare Workers with D1 and R2, plus a Python engine with ffmpeg and Whisper.
A 134 MB episode, end to end
~2 min
approximately
Projects
What I built and still run, with what can be checked about each one.
2025 – now
Full-stack developer
E-commerce for a security-systems company that sells cameras and alarms with installation. It replaced their WordPress: catalog, quoting engine and Bold payments through HMAC-signed webhooks.
Next.js 16 · React 19 · PostgreSQL + Drizzle · Hetzner · OpenTofu
recoversds.com2026
AI agent · Recover
Answers Recover's customers on WhatsApp and the web: searches the catalog, quotes prices, explains installation and drafts formal quotes. A verifier rejects any price that did not come from a tool.
Claude Haiku 5.5 · OpenRouter · tools · WhatsApp
Case study
Mar – Oct 2026
Full-stack · freelance
Booking with mental-health professionals, with mandatory payment through Wompi. The first paid appointment came in September 2026.
Next.js 16 · Better Auth · Drizzle · Inngest · Sentry
esvital.group
Apr 2026 – now
Backend developer
A Telegram bot for market analysis, with paid subscriptions by card (Wompi) and crypto (NowPayments), idempotent webhooks and several vision-capable AI models.
Python 3.12 · aiogram · FastAPI · PostgreSQL
dagotrading.com
2026
Developer
Online ordering for a restaurant. Every order prints itself as a ticket on the point-of-sale printer (ESC/POS).
TypeScript · ESC/POS
carnudos.com
2026
Co-founder · Cimadium
Cuts, illustrates, subtitles, edits and schedules: one recording becomes the episode, the clips, the thumbnails and the publishing calendar. One app serves several creators.
Python · ffmpeg · Whisper · Cloudflare Workers · D1 · R2
prisma.cimadium.com
Aug 2026 – now
Co-founder
Subscription websites for Colombian small businesses. Every site is a Cloudflare Worker and the infrastructure is written as code. First client on its own domain: Fuente Pura.
Astro · Cloudflare Workers · D1 · R2 · OpenTofu
cimadium.comHow I work
What the business needs, and how we will know it works.
Architecture, vendors and costs. When in doubt, measure before choosing.
AI implements. I define what gets built, review how it turned out and answer for it.
Automated tests and CI are the gate: nothing reaches production without passing.
Infrastructure as code, and real payments through signed, idempotent webhooks.
Cost, latency and usage in production. What comes out goes back to step one.
Contact
I am looking for remote work as an AI-first product engineer. If you run a business that needs software, I also build it through Cimadium.