Hi! I am SERGIO

software developer  working remotely from Madrid

I love product and design
There is nothing that motivates me more than solving real-world problems, and do it elegantly.

I build things
I spend a bunch of time developing my skills in a myriad of fields. I build products but I also make furniture and paintings with robots. I learn something new from all my inventions.

I work with a bunch of good people
During my career, I had to effectively communicate with people from all departments. I'm a firm believer in the idea that great products are created by great teams.

I'm currently looking for a freelance or part‑time position.

WORK

Security Engineer Harvest '21 - '23

At Harvest, I was part of the Data and Security Engineering team. Among other projects, I worked on the following:

  • Implementing counter-measures to protect the company from external attacks.
  • Modernizing our secrets management pipeline.
  • Building internal tools to monitor unexpected uses of the app.
  • Fixing security issues in all platforms (backend, mobile and web).
  • Securing our emails using DMARC.

I collaborated with the SRE team and, in the process, learned how to build resilient real-world infrastructure.

Frontend Engineer Sketch '20 - '21

While in Sketch, I had the opportunity to learn modern web development in Typescript and React. I implemented multi-account, SSO sign in, worked on the design system and helped revamping the render framework. However, my main take away from my time in Sketch was learning how to work in a truly distributed company.

Mobile Engineer Karumi '15 - '20

Karumi was my first consultant role where I had the chance to expand my reach. I worked directly with clients in their projects, sharing my expertise with them while learning what building a product really meant for all teams involved: design, data, product, business, etc.

I had the opportunity to give talks and courses on advanced topics like screenshot testing or how to build public APIs. Finally, I contributed to many open-source projects like Dexter, learnyougit and Kin.

Software Engineer Tuenti '13 - '15

When I joined Tuenti, I worked primarily on the PHP backend, developing tools and features for the support team. I changed teams to work on the chat and I specialized on the VoIP stack with WebRTC. I integrated full VoIP capabilities in the chat for the web. I ended up helping implement the Android and iOS versions as well and took the opportunity to learn mobile development in the process.

Designer Guauful '21 - Now

Guauful is a pet store specialized in hand-made leashes, snacks and supplements for your furry ones.

I built the brand from the ground up, focusing on transmitting the core values of the company while keeping a consistent and reusable design language.

Creator Four Days '19 - Now

Four Days is an app written in React Native - Typescript and published for iOS and Android. It helps people following a rotation diet to keep track of what they eat and avoid repetitions.

Creator Bataba '18 - Now

The simplest Tabata app for your training. No fancy features, no user profile nor stats. It just counts time.

I used Bataba to learn the basics of React Native and Typescript before tackling more complex projects.

HOBBIES

Woodworking

Product Design

Photography

Music Composition

Pen Plotting