Voltaware - Data Analyst - Madrid/Flexible - 25 - 35k€

About Voltaware

Voltaware is an energy monitoring start-up that is making a breakthrough in the IoT market by proposing a technology combining:

  • behavioural monitoring for elderly care,
  • breakdown of the electricity consumption for individuals,
  • preventive maintenance for businesses.

Over the last 6 years, Voltaware has accumulated a deep expertise in the field of energy data analysis and is exploring every month new use cases to apply this knowledge.

About the Role

For this role, Voltaware is looking for a Junior Data Analyst to support the data science team in the task of evaluating the models the output of our ML models.

Energy data is complex, and this role is not a “scrolling spread sheet role”. Problems can be hard to observe and thus, the role requires the ability to manipulate, display and understand complex data.

The successful candidate will have the prior responsibilities of:

  • Analyse the performance of Voltaware analytic tools and deliver report about it
  • Identify strengths and weaknesses of Voltaware’s ML model
  • Support the data science team in data labelling tasks
  • Deliver analytics to respond to some clients demands

Job Requirements

The successful candidate will have to tick the following boxes:

  • Bachelor degree or equivalent in engineering, statistical sciences, or in another analytical field
  • An education in electrical engineering or electronics is desirable
  • Ability to innovate and carry on complex projects
  • Good statistical background
  • Experience with python applied to Data Science
  • Excellent communication and data visualization skills
  • Excellent spoken and written English

Bonus skills and experiences:

  • Experience with visualization libraries (mathplotlib, bokeh, seaborn)
  • Experience with: energy data or sensor data
  • Experience with time series analysis or with spectral analysis
  • Data engineering experiences and skills are always welcome


Madrid or remotely in Spain but exceptional candidates will be considered for any remote location.

Work language

100% English

Development and support

With a growing data team of already 10 people, and with the support of experienced python developers, infrastructure engineers and devops, Voltaware is a place where pertinent ideas are meant to be deployed to production.

As a startup, Voltaware used to train people by giving them responsibilities. This role fits particularly to a graduate data scientist who wants to be confronted to challenges of commercial applications of data science.

Recruitment Process

  1. Screening questionnaire to fill in a google form,
  2. Introduction interview 30 mins with 1 or 2 team members.
  3. Case Study: the candidat receives a case study and has a couple of day to prepare it. Then a 1h interview is organised with 2 or 3 members of the team.


  • 25-35k euros based on experience


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