Werfen is a family-owned, innovative company founded in 1966 in Barcelona, Spain. As a global leader in specialized diagnostics, Werfen specializes in Hemostasis, Acute Care Diagnostics, Transfusion, Autoimmunity, and Transplant, operating in over 30 countries and more than 100 territories. Their commitment to customers and dedication to innovation and quality drive their continued success.

For the Software Engineer position, Werfen seeks individuals to lead development activities, including requirements, architecture, design, implementation, and integration. Candidates should have strong technical leadership skills and be adept in software engineering practices. This guide will walk you through the interview process, key responsibilities, and essential qualifications for the role.

Ready to start your journey with Werfen? Interview Query has you covered with an in-depth interview guide. 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 Werfen as a Software Engineer. Whether you were contacted by a Werfen 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 Werfen 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 Werfen hiring manager is 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 Werfen Software Engineer role is usually conducted through virtual means, including video conference and screen sharing. Questions in this 1-hour long interview stage may revolve around embedded systems, graphical user interfaces, C++ programming, and software development methodologies.

In some cases, take-home assignments regarding software development, debugging, and design principles are incorporated. Your proficiency with software engineering principles, real-time concepts on embedded Linux or RTOS platforms, and integration testing will also be assessed during the round.

Depending on the seniority of the position, case studies and similar real-scenario problems may also be assigned.

Onsite Interview Rounds

After a second recruiter call outlining the next steps, 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 Werfen office. Your technical prowess, including programming and software design 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 for the Software Engineer role at Werfen.

Quick Tips For Werfen Software Engineer Interviews

• Brush Up on C++ and Embedded Systems: Werfen places a strong emphasis on technical skills involving C++ and embedded systems. Make sure you are well-versed in these areas.
• Understand the Product Lifecycle: Be familiar with the full software product lifecycle using agile methodologies. Demonstrating your understanding of real-time concepts on embedded Linux or RTOS platforms can be beneficial.
• Show Team Collaboration Skills: Werfen values teamwork and communication. Practice responding to behavioral questions with answers that highlight your experience working in team environments.

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

• Write a function calculate_rmse to calculate the root mean squared error of a regression model. The function should take in two lists, one that represents the predictions y_pred and another with the target values y_true.

• Write a query to get the last transaction for each day from a table of bank transactions. Given a table of bank transactions with columns id, transaction_value, and created_at, write a query to get the last transaction for each day. The output should include the id of the transaction, datetime of the transaction, and the transaction amount. Order the transactions by datetime.

• Write a function random_key that returns a key at random with a probability proportional to the weights. Given a dictionary with weights, write a function random_key that returns a key at random with a probability proportional to the weights.

• Write a function to get a sample from a standard normal distribution.

• Write an efficient function nearest_entries to find the closest element to N in a sorted list and return surrounding elements. Given a sorted list of integers ints with no duplicates, write an efficient function nearest_entries that takes in integers N and k and returns the element closest to N along with the k-next and k-previous elements of the list.

• How would you analyze the churn behavior of users on different Netflix pricing plans? Netflix has two pricing plans: $15/month or $100/year. An executive wants to understand the churn behavior of users on these plans. What metrics, graphs, and models would you build to provide an overarching view of subscription performance?

• How would you predict which merchants DoorDash should acquire in a new market? As a data scientist at DoorDash, you need to build a model to predict which merchants the company should target for acquisition when entering a new market. How would you approach this task?

• How would you value the benefit of keeping a hit TV series on Netflix? Netflix executives are considering renewing a deal with another TV network for exclusive streaming rights to a hit TV series. The show has been on Netflix for a year. How would you approach valuing the benefit of keeping this show on Netflix?

• How would you measure and address the success of LinkedIn’s newsfeed ranking algorithm?

• How would you measure the success of LinkedIn’s newsfeed ranking algorithm?

• If some success metrics for the newsfeed algorithm are improving while others are declining, how would you approach this situation?

• How would you determine the statistical significance of an AB test for a landing page redesign? You want to launch a redesign of a landing page to improve the click-through rate using an AB test. How would you infer if the results of the click-through rate were statistically significant or not?

• How would you explain what a p-value is to someone who is not technical? Explain the concept of a p-value in simple terms to a non-technical person, focusing on its role in determining the significance of results in hypothesis testing.

• How many more samples would we need to decrease the margin of error from 3 to 0.3? Given a sample size (n) with a margin of error of 3, calculate the additional number of samples required to reduce the margin of error to 0.3.

• How would you determine if the results of an AB test on a landing page redesign are statistically significant? Describe the process of analyzing AB test results to determine if the observed differences in click-through rates are statistically significant.

• How would you build a model to predict which merchants DoorDash should acquire in a new market? As a data scientist at DoorDash, describe the steps you would take to build a predictive model for identifying which merchants the company should target for acquisition when entering a new market.

• How would you assign point values to letters in a Spanish Scrabble game without knowing Spanish? If tasked with building Scrabble for Spanish users and you don't know Spanish, explain your approach to assigning point values to each letter.

What is the average salary for a Software Engineer at Werfen?

Q: What is Werfen and what does the company specialize in?
Werfen is a growing, family-owned company founded in 1966 in Barcelona, Spain. It is a worldwide leader in specialized diagnostics in Hemostasis, Acute Care Diagnostics, Transfusion, Autoimmunity, and Transplant. The company emphasizes innovation and quality to provide healthcare professionals with comprehensive solutions to improve hospital efficiency and enhance patient care.

Q: What are the key responsibilities of a Senior Software Engineer at Werfen?
As a Senior Software Engineer at Werfen, you will lead software development activities, including software requirements, architecture, design, implementation, and integration. The role involves developing high-quality software, performing unit and integration testing, conducting code reviews, supporting process improvement activities, and ensuring compliance with quality processes per FDA and IVDR guidelines.

Q: What qualifications are required for the Senior Software Engineer position at Werfen?
The position requires a BS/BA degree in Computer Science, Computer Engineering, Electrical Engineering, or a related field. Additionally, candidates should have 5+ years of software development experience for embedded systems and 3 years of experience in developing user interface software using Qt/QML. Strong communication skills, the ability to work in team environments, and proficiency in C++ are also required.

Q: How is the work culture at Werfen?
Werfen values innovation, quality, and collaboration. With a workforce of over 7,000 and a presence in more than 30 countries, the company fosters a diverse and dynamic work environment. Employees are encouraged to contribute ideas and work in team-oriented settings, with opportunities for ongoing learning and daily challenges.

Q: How can I prepare for an interview at Werfen?
To prepare for an interview at Werfen, research the company and its specialized diagnostic areas. Review your technical skills and ensure proficiency in relevant software development tools and methodologies. Practicing common interview questions related to software engineering on Interview Query can also help you perform effectively during the interview.

Looking to join an innovative and rapidly growing company like Werfen? Your opportunity awaits! Dive deeper into the specifics of Werfen's interview process with our dedicated Werfen Interview Guide, tailored to help you navigate the nuances of their expectations and potential questions. Whether you’re prepping for the Senior Software Engineer role or curious about other career paths within Werfen, Interview Query provides the insights and tools you need to excel.

At Interview Query, we strive to equip you with the confidence, knowledge, and strategy necessary to ace every interview challenge. Check out all our company interview guides for more in-depth preparation insights. Don’t hesitate to reach out to us with any questions.

Best of luck with your Werfen interview! Illuminate your career path with Interview Query.