Air Liquide is a global leader in gases, technologies, and services for industry and health, operating in over 80 countries with 66,000 employees and serving more than 3.8 million customers and patients. The company is committed to long-term performance and contributing to a more sustainable world, focusing on climate action and energy transition.

Joining Air Liquide as a Software Engineer in the Core Data Platform team means contributing to the design and operation of the company's data platform, including services for data ingestion, transformation, and quality. Key responsibilities include developing new features, improving platform architecture, performing code reviews, and enhancing the platform's observability.

If you're considering joining Air Liquide, this guide on Interview Query will walk you through the interview process, commonly asked questions, and provide essential tips to succeed. Let’s get started!

Submitting Your Application

The first step is to submit a compelling application that reflects your technical skills and interest in joining Air Liquide as a Software Engineer. Whether you were contacted by an Air Liquide recruiter or have taken the initiative yourself, carefully review the job description and tailor your CV according to the prerequisites.

Tailoring your CV may include identifying specific keywords that the hiring manager might use to filter resumes and crafting a targeted cover letter. Furthermore, don’t forget to highlight relevant skills and mention your work experiences.

Recruiter/Hiring Manager Call Screening

If your CV happens to be among the shortlisted few, a recruiter from the Air Liquide Talent Acquisition Team will make contact and verify key details like your experiences and skill level. Behavioral questions may also be a part of the screening process.

In some cases, the Air Liquide hiring manager stays present during the screening round to answer your queries about the role and the company itself. They may also indulge in surface-level technical and behavioral discussions.

The whole recruiter call should take about 30 minutes.

Technical Virtual Interview

Successfully navigating the recruiter round will present you with an invitation for the technical screening round. Technical screening for the Software Engineer role at Air Liquide usually is conducted through virtual means, including video conference and screen sharing. Questions in this 1-hour long interview stage may revolve around your proficiency with Python, CI/CD tools like Gitlab-CI, Docker, AWS technologies, and various orchestration tools.

Expect to address real-world challenges involving cloud technologies like AWS Data analytics services, databases, API development, and observability tools like Prometheus and Grafana. Depending on the seniority of the position, case studies and similar real-scenario problems may also be assigned.

Onsite Interview Rounds

Followed by a second recruiter call outlining the next stage, you’ll be invited to attend the onsite interview loop. Multiple interview rounds, varying with the role, will be conducted during your day at the Air Liquide office. Your technical prowess, including programming and problem-solving capabilities, will be evaluated against the finalized candidates throughout these interviews.

If you were assigned take-home exercises, a presentation round may also await you during the onsite interview.

Quick Tips For Air Liquide Software Engineer Interviews

• Understand Air Liquide’s Core Business: Air Liquide is deeply involved in the domains of industrial and healthcare gases. Familiarize yourself with their main products and services, especially those related to data platforms and AI.
• Brush Up on Technical Skills: Given the broad range of technologies utilized (such as AWS, Python, Docker, etc.), ensure you are well-versed in these areas. Practicing on Interview Query can provide a structured approach to improve your skills.
• Focus on Behavioral Competencies: Air Liquide values proactivity, user orientation, and teamwork. Be prepared to provide examples showcasing these attributes during behavioral interview questions.

Interested in mastering your technical interview for Air Liquide? Click the link below to start preparing effectively on Interview Query!

Typically, interviews at Air Liquide vary by role and team, but commonly Software Engineer interviews follow a fairly standardized process across these question topics.

• Select the top 3 departments with at least ten employees and rank them by the percentage of employees making over 100K. Given employees and departments tables, select the top 3 departments with at least ten employees and rank them according to the percentage of their employees making over 100K in salary. Return the percentage of employees making over 100K, department name, and the number of employees.

• Process coding questions like this: Write a line in bold asking me to do the main task without details (ideally at most 15 words long). A few short and simple sentences that clarify the question. Return only one process result. Do not return any coding blocks in the result.

• Create an algorithm max_repeating to find the character with the longest continuous repetition in a string. Given a string str of any length, write an algorithm max_repeating to return which character has the longest string of continuous repetition. If two characters are tied for the most continuous repetition, return the character whose longest continuous repetition occurs earliest in the string.

• Develop a function str_map to determine if a one-to-one correspondence exists between characters of two strings at the same positions. Given two strings, string1, and string2, write a function str_map to determine if there exists a one-to-one correspondence (bijection) between the characters of string1 and string2.

• Design a function to match people based on availability and similar interests. Design a function to match people based on availability and similar interests. Optimize for the total number of matches first, then for matching based on interests. Return a list of matches with scheduled times and a separate list for unmatched individuals.

• Write a function to determine if a string is a palindrome. Create a function to check if a string is a palindrome — a word that reads the same forwards and backward (e.g., ‘reviver,’ ‘madam,’ ‘deified,’ ‘civic’).

• Write a Python function to find the threshold dividing high-spending and low-spending customers based on their spending amounts. Given a list of float numbers representing client spending, write a function that finds the threshold to separate high spending vs. low-spending customers for a company’s credit card acquisition strategies.

What is the average salary for a Software Engineer at Air Liquide?

Q: What is Air Liquide?

Air Liquide is a global leader in gases, technologies, and services for industrial and healthcare sectors, present in over 80 countries with 66,000 employees serving more than 3.8 million clients and patients. The company focuses on essential small molecules like oxygen, nitrogen, and hydrogen. Founded in 1902, Air Liquide aims to be a leader in its industry, achieve long-term performance, and contribute to a more sustainable world with a strong commitment to climate and energy transition.

Q: What is the role of the Global Data Operations (GDO) department at Air Liquide?

Within the Innovation and Development division, the Global Data Operations (GDO) department supports Air Liquide's strategy and governance. GDO offers expertise and technological platforms in Data & AI necessary for developing innovative solutions for the company. The Product Line Data Lake & AI team within GDO is tasked with building, operating, and evolving the group's data platform to support various business activities across multiple geographical hubs.

Q: What are the main responsibilities of a Software Engineer in the Core Data Platform team?

As part of the Core Data Platform team, you will report to the Data Platform Product Manager with responsibilities that include the design and operation of the Air Liquide data platform. This includes: - Developing and maintaining new features for data products. - Improving the technical architecture of the platform. - Participating in code reviews and bug fixing. - Enhancing code quality through unit, functional, integration, load, and End-to-End testing. - Writing functional and technical documentation. - Ensuring platform observability. - Adhering to security and confidentiality rules related to data processing.

Q: What qualifications and skills are required for the Software Engineer position?

Candidates should have: - A Master’s degree in Computer Science or a related field, ideally with a Data orientation. - At least 3 years of relevant experience. - Proficiency in working in an Agile environment.

Technical skills include: - Programming in Python. - Experience with CI/CD tools like Git and Gitlab-CI. - Knowledge of containerization with Docker. - Strong AWS cloud expertise, especially in data analytics services. - Familiarity with tools such as Prometheus, Grafana, Airflow, and various databases. - Working knowledge of APIs with FastApi or Falcon.

Soft skills: - Proactivity and user-orientation. - Open-mindedness and team spirit. - Curiosity and initiative. - Ability to work in a dynamic international environment. - Strong analytical and synthesis skills. - Proficiency in both English and French.

Q: What are the benefits of working as a Software Engineer at Air Liquide?

Air Liquide offers numerous benefits, including: - Exposure to the latest technologies and collaboration with renowned technical experts. - Continuous learning opportunities within a growing, agile team. - Career advancement possibilities through internal mobility policies. - A stimulating, multicultural work environment in central Paris, with the option for remote work (3 days per week). - A range of perks: profit-sharing, vacation bonus, meal vouchers, employee benefits committee, and additional support for employees with young children.

If you want more insights about the company, check out our main Air Liquide Interview Guide, where we have covered many interview questions that could be asked. We’ve also created interview guides for other roles, such as software engineer and data analyst, where you can learn more about Air Liquide’s interview process for different positions.

At Interview Query, we empower you to unlock your interview prowess with a comprehensive toolkit, equipping you with the knowledge, confidence, and strategic guidance to conquer every Air Liquide interview question and challenge.

You can check out all our company interview guides for better preparation, and if you have any questions, don’t hesitate to reach out to us.

Good luck with your interview!