Glassdoor users rated their interview experience at Energy One as 100% positive with a difficulty rating score of 3 out of 5 (where 5 is the highest level of difficulty). Candidates interviewing for Senior Java Developer and rated their interviews as the hardest, whereas interviews for Senior Java Developer and roles were rated as the easiest.
The hiring process at Energy One takes an average of 2 days when considering 1 user submitted interviews across all job titles. Candidates applying for Senior Java Developer had the quickest hiring process (on average 2 days), whereas Senior Java Developer roles had the slowest hiring process (on average 2 days).
I applied online. I interviewed at Energy One (Paris) in Nov 2025
Interview
Annonce sur LinkedIn, entretien de "screening" avec une RH basée à Bruxelles. Mon profil a été validé et je devais avoir un second entretien avec la CFO puis avec le Country Manager. 10 jours plus tard, la RH me rappelle pour m'informer que le process s'arrête à la demande de ces deux opérationnels parce que mes deux derniers postes n'étaient pas en CDI. J'avais eu beau expliquer à la RH que 'en France il est extrêmement difficile de décrocher un CDI quand on est une femme de + de 50 ans, cela n'était pas entendable pour les opérationnels. Conclusion : il y a un fort biais vis-à-vis de l'âge dans cette entreprise et c'est très regrettable.
Interview questions [1]
Question 1
Pourquoi vos deux derniers postes n'étaient pas en CDI ?
I applied online. The process took 3 days. I interviewed at Energy One (Houston, TX) in Aug 2023
Interview
Positive interview, very informative and positive experience. Great interviewers, asked good questions and had good responses. Would recommend at least giving them a shot at providing for your future needs.
I applied online. The process took 2 days. I interviewed at Energy One (Sydney) in May 2018
Interview
The first step is to write a small Java program. The development manager sent me the problem via email. He said it should take one+ hour. I spent 5 hours on it and send him my code the next day.
My code did miss some cases and it led to non-procession.
My advice: The question did not provide much test cases. You'd better think carefully about possible failing cases before you believe your code is correct!