Guillermo De Fermín
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Guillermo De Fermín Email & Phone Number

Staff Software Engineer at Taxfix at Taxfix
Location: Berlin, Berlin, Germany 7 work roles 1 school
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✓ Verified May 2026 3 data sources Profile completeness 86%

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Current company
Role
Staff Software Engineer at Taxfix
Location
Berlin, Berlin, Germany
Company size

Who is Guillermo De Fermín? Overview

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Quick answer

Guillermo De Fermín is listed as Staff Software Engineer at Taxfix at Taxfix, a company with 236 employees, based in Berlin, Berlin, Germany. AeroLeads shows a matched LinkedIn profile for Guillermo De Fermín.

Guillermo De Fermín previously worked as Staff Software Engineer at Taxfix and Staff Software Engineer at Taxfix. Guillermo De Fermín holds Bachelor In Computer Science Engineering, Computer Science from Universidad Politécnica De Madrid.

Company email context

Email format at Taxfix

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Taxfix

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Profile bio

About Guillermo De Fermín

I'm a software engineer and I'm passionate about what I do. I like to spend my free time tinkering with computers, and what I love most about my job(s) is when I get to use new technologies or tools. I have experience with many programming languages, but I'm not afraid to program in a language I've never touched before.I've worked in many different environments (research, startup, corporate) and this has taught me how to work with many different kinds of people. I really enjoy meeting people from different backgrounds and cultures and learning something new from them.I have experience in systems administration (linux and macOS), software development in many languages (including Typescript, Python and C++), Scrum/agile methodologies and artificial intelligence.

Current workplace

Guillermo De Fermín's current company

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Taxfix
Taxfix
Staff Software Engineer at Taxfix
berlin, berlin, germany
Website
Employees
236
AeroLeads page
7 roles

Guillermo De Fermín work experience

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Staff Software Engineer

Current

Berlin, Germany

May 2023 - Present

Staff Software Engineer

Madrid, Community Of Madrid, Spain

Oct 2022 - Apr 2023

Senior Software Engineer

Madrid, Community Of Madrid, Spain

Jun 2021 - Nov 2022

Software Engineer

Madrid, Community Of Madrid, Spain

Sep 2019 - May 2021

Co-Founder And Cto

Connme. Ug (Haftungsbeschränkt)

As CTO of connme., I was responsible of all of the technical aspects of the company. This includes designing and implementing the website and mobile application as well as interviewing new programmers and coordinating and overseeing their work.Our efforts led us to release a beta version of the mobile application.

Sep 2016 - Apr 2020

Consultant - Software Engineeing

Stuttgart Area, Germany

I worked for Porsche as an external consultant, in a cross- brand project with Audi, VW and Porsche. My team's role was to provide a docker-based development environment with state of the art tools for cross-compilation, unit testing and static analysis, as well as deploying and configuring the backend infrastructure (Atlassian stack, Jenkins, Kubernetes).

Jan 2018 - Aug 2019

Software Engineer

Computer Vision And Automated Robotics Laboratory (Upm)

Madrid Area, Spain

I designed and implemented 3 core components of the robotics artificial intelligence stack Aerostack. One of the components is responsible for managing a symbolic memory for an unmanned aerial vehicle, while the other two interpret mission plans specified for it.I worked closely with other software engineers in my team, as well as with industrial engineers.

May 2016 - Sep 2017
Team & coworkers

Colleagues at Taxfix

Other employees you can reach at taxfix.de. View company contacts for 236 employees →

1 education record

Guillermo De Fermín education

FAQ

Frequently asked questions about Guillermo De Fermín

Quick answers generated from the profile data available on this page.

What company does Guillermo De Fermín work for?

Guillermo De Fermín works for Taxfix.

What is Guillermo De Fermín's role at Taxfix?

Guillermo De Fermín is listed as Staff Software Engineer at Taxfix at Taxfix.

Where is Guillermo De Fermín based?

Guillermo De Fermín is based in Berlin, Berlin, Germany while working with Taxfix.

What companies has Guillermo De Fermín worked for?

Guillermo De Fermín has worked for Taxfix, Connme. Ug (Haftungsbeschränkt), Mhp – A Porsche Company, and Computer Vision And Automated Robotics Laboratory (Upm).

Who are Guillermo De Fermín's colleagues at Taxfix?

Guillermo De Fermín's colleagues at Taxfix include Mert Gülcan, Gurdeep Singh, Save Etax, Daniel Niesing, and Vladislavs Lomako.

How can I contact Guillermo De Fermín?

You can use AeroLeads to view verified contact signals for Guillermo De Fermín at Taxfix, including work email, phone, and LinkedIn data when available.

What schools did Guillermo De Fermín attend?

Guillermo De Fermín holds Bachelor In Computer Science Engineering, Computer Science from Universidad Politécnica De Madrid.

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