Guifré Ballester

Once I co-founded my first startup, I found my passion. I consider myself an enthusiastic Product Manager with an entrepreneurial personality and strong tech background. My main skills are analysis, prioritization and business strategy. I’m used to work hand by hand with tech leads, developers and different stakeholders looking for excellence. My goal is to provide customers the product they deserve. Right now, I’m working as a Product Manager @ Stayforlong's Barcelona offices. Here, we're reinventing the "long" travel industry, by providing better conditions when staying more nights.


Product Manager


Build and execute the strategy of the product. End-to-end ownership of the product roadmap.

Define, design, implement and manage various product management and development methodologies according to all stakeholders needs. Agile, SCRUM, Extreme Programming.

Go from idea conceptualization to definition, execution and follow-up.

Make sure that prioritization is done correctly, and that our throughput keeps increasing while our quality standards are maintained.

Day to day management of the product KPIs metrics, by always having the numbers at hand and analyzing its performance through data.

January 2020 - Present

Product Owner


Take responsibility for a part of the roadmap and keep it up to date, manage the construction of the product in Spain, automating laws and creating new and powerful modules that make the best payroll and Human Resources solution ever conceived.

Learn and help improve the language created in house, JetLang, which allows both to organize the user interface and internal logic.

Understand the complexities of the Spanish payroll, collective agreements and create and manage the connections between the thousands of variables that make up the logic of the application.

January 2019 - January 2020

CPO and cofounder


Leading research in innovation in the Software Quality field. Research, design, implementation and validation of innovative ideas following the Lean Startup methodology.

August 2018 - November 2018

Research Intern - Data Scientist


Participates in BotCorn Innovation Project. Research, design, implementation and validation of cutting-edge algorithms. Analyse diverse sources of real data and translate them into targeted business goals & insights, aiming to develop innovative ways of taking advantage of them. Work with state-of-the-art machine learning & deep learning algorithms.

May 2018 - August 2018

BI Engineer


Participates in the design and development services of Analytics and Big Data solutions. Develops data visualization tools with R+Shiny, dashboards with MicroStrategy and work with ETL tools like with Pentaho Data Integrator (Kettle). Also develops projects for the UPC involving data transformation using python.

June 2016 - August 2018


Master of Data science

Universitat Politècnica de Catalunya
The master’s degree equips graduates with solid knowledge and hands-on experience in techniques for managing, analyzing and extracting hidden knowledge from structured and unstructured big data ensembles and in building adaptive analytic systems that are able to exploit that knowledge in modern organizations.

Average grade: 7.73

February 2017 - Present

Bachelor's degree in telecommunications science and technology

Universitat Politècnica de Catalunya
This bachelor's degree provides graduates with a broad profile that includes skills and expertise in communications systems, networks, electronics and audiovisual systems to ensure that they have the professional competencies that they need to practise as telecommunications engineers. The aim is for the graduates to enter modern industry as benchmark professionals in the new multidisciplinary work and production scenario.

Average grade: 6.75

September 2011 - January 2017


Programming Languages & Tools
CEO of the Product
  • Ownership of the roadmap
  • Agile, SCRUM, Extreme Programming
  • Go from idea conceptualization to definition, execution and follow-up.
  • Prioritization
  • Management of the product KPIs metrics
  • Leverage of data


Apart from being a Product Manager, I enjoy most of my time being outdoors. I am an avid runner, where I prefer trail over asphalt races. What takes the best of me are the obstacles races like spartanrace. In the winter, I am a novice alpinist. During the warmer months here in Catalonia, I enjoy adventure sports.

When forced indoors, I follow a number of sci-fi and fantasy genre books, movies and television shows; I am an aspiring chef, and I spend a large amount of my free time exploring the latest technolgy advancements in the Deep Learning field.

Awards & Certifications