Eduardo López

The first web engineer

As of October 2026, I had worked at Nixtla for a little over three years. I was the first web engineer and, for most of that time, the only person in that role. I continue as Head of Web.

TimeGPT and the developer experience

I created the first API serving the initial TimeGPT model, along with the developer dashboard and website. This covered the web products and interfaces through which developers accessed the forecasting service.

Monitoring, analytics, and internal products

I built monitoring tools and took responsibility for analytics and HubSpot integrations. My remit also includes several internal AI products that have not been publicly released.

Selected public work

• Put the fix where the routes live

  Four obsolete documentation URLs returned 404s. I added redirects in Nixtla's Mintlify configuration, which owns the documentation routes. The website forwards documentation requests there. The merged change maps each old address to its replacement, with destination checks recorded in the pull request.

• Replace the previous documentation output

  I updated both preview and production documentation workflows to remove the previous HierarchicalForecast output before copying the rebuilt directory. This makes replacement explicit instead of copying new files over an existing output directory. The public diff shows the change in both workflows.

From the first apps to the engineering team

Before we raised funding, I built the software myself: the API, website, and iOS, Android, and web applications for customers, warehouse teams, and delivery drivers. My remit also covered internal tools and analytics.

We went through Y Combinator W22, raised a little over USD 3.5 million during my time there, and served hundreds of business customers. The company reached 80 employees, including the technology team of seven that I hired and led.

The next direction

I wanted to focus fully on AI, while my cofounders wanted to pivot toward lending. We agreed on a founder separation that included a small personal exit. The company now operates as BelozFi.

Selia

Built the complete first version for therapists and patients across iOS, Android, and web. It included therapist discovery, connecting patients with therapists, booking, payments, and video sessions inside the app.

MarketPryce

Built the iOS app for discovering and connecting with sports influencers, including matching. That app is no longer in use.

Ciro

Redesigned the whole product in Figma. This engagement was entirely product design and did not include writing code.

CervezaSiempre for AB InBev

Led development of a beer subscription service for AB InBev. We launched in about a month and a half and reached thousands of customers over the following month and a half.

It was planned as a short engagement. After completing it, I moved to the role at Betterfin that I had already arranged.

Delivery products and team

My work covered the delivery apps, fleet tools, customer dashboards, and internal operations across iOS, Android, and web. I also managed a small engineering and design team.