Nicolás Biondi

I build, I teach, and I put out fires. Some of them real.

I run LENZ Photo Store, a Canon and Sony distributor in Peru. Administrative engineer specialized in supply chain, teacher and volunteer firefighter. I build automations with AI.
Portfolio Blog

What I've built

Measurable results from real projects; each card links to the full story.

Database

5 s → 0.6 ms

Every click rewrote a 130 MB file and crashed the page; now it changes a single record.

Read the case

AI agents

28 billion

tokens in six months, 94% served from cache: text already read costs a fraction.

Read the case

Cloud costs

30% → 0.3%

We metered every write, found the two that ate the free quota, and moved them elsewhere.

Read the case

Bot on X

96 → 45 posts

The counter reset at midnight and X blocked the bot; now it watches the last 24 hours.

Read the case

Trading

MIT license

Uncle Carl: an open-source trading platform that runs on your own machine.

Code

This blog

6 models

Every week a script drafts posts and a jury of 6 models reviews them before publishing.

See the blog

Blog

Notes on AI agents, ecommerce and the infrastructure behind them.

Amber store counter with a figure in shadow and stations glowing in cyan, violet and turquoise

AI Agents New

Boss and interns

How I split coding work across several AI models without the bill exploding

28 billion tokens in six months, 94% of them read from cache. How I split the work between one expensive model and several cheap ones at LENZ.

#delegation#caching#tokens#workflow

Nicolás Biondi· 4 min readRead the post

Empty chair in a hall with an ID card on the seat, lit between blurred chairs in the dark.

Lessons

The wrong key

We matched each sale to its row in the sheet instead of the camera sold, so duplicates slipped through

Nicolás Biondi· 4 minRead the post

A lone brass bell on a dark desk, crossed by a cyan beam and a violet glow.

Lessons

The test mode didn't test

We sent test mode on every order, but the invoicing API never checked: the account decides that

Nicolás Biondi· 3 minRead the post

A long line of light dots across the floor and a cyan frame enclosing one stretch, under a crescent moon.

Lessons

Midnight doesn't count

Our counter allowed 96 posts in 24 rolling hours and X blocked the bot at post 64

Nicolás Biondi· 4 minRead the post

A brass doorbell on a dark wall with its cut cable hanging, the copper ends barely shining.

Infrastructure

The doorbell won't ding

We changed a key and the alerts chat went quiet without a single error. Now we count the alerts that arrive

Nicolás Biondi· 3 minRead the post

See more

For agents

This site is agent-readable. If you are an LLM or an agent, read /agents.md for structured facts and citation guidance, or /llms.txt for a terse summary.

GitHub activity

6,322 contributions in the last year, mostly in private repos. github.com/nicolasbiondic

GitHub contribution graph of the last year, Pac-Man style: Pac-Man sweeps the grid eating the active days, chased by three ghosts.