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Machine Learning Engineer (f/m/d)

adjoe is a leading mobile ad platform developing cutting-edge advertising and monetization solutions that take its app partners’ business to the next level. Part of the applike group ecosystem, adjoe is home to an advanced tech stack, powerful financial backing from Bertelsmann, and a highly motivated workforce to be reckoned with.


Meet Your Team: WAVE Data Science


Did you know that in-app ads are sold in a real-time auction before they get rendered in thousands of mobile apps? Dozens of ad networks compete for every single view, choosing their best ad and deciding what price to bid in just a couple hundred milliseconds. We at adjoe have developed our own ad network that takes part in this competition, fighting against giants like Google, Meta and TikTok to present its own ads. To stand a chance in this fierce competition, the WAVE Data Science team builds creative algorithms using technologies ranging from simple linear regression to advanced deep learning models. Everything we do is based on solid research about user behavior as well as publisher and advertiser analysis to build competitive bidding algorithms that balance the advertisers’ goals, the publishers’ expectations and of course the user experience. To make our inventions come to life we use state-of-the art technology and work closely with the product and business teams to shape the future of adjoe’s core business and technologies.


What You Will Do
  • Dive into state-of-the-art algorithms and deep learning models to create recommendation systems, predict user behavior, and optimise user retention.
  • Conduct bidding algorithm experiments end-to-end: from idea generation and research to deployment to production, monitoring and decision making based on the results.
  • Dive deep into the technical implementation of our algorithms and optimise them for use in production.
  • Build systems to monitor technical and business KPIs in real-time.
  • Act as an advocate for data-related topics in the company and become the go to person in your area of expertise.


Who You Are
  • You have 2+ years of professional experience in the Data Science field building recommendation systems or similar (for example in adtech, retail, search, ranking).
  • You have shown a great level of understanding of deep neural networks (libraries such as TensorFlow and PyTorch) and have experience developing deep neural networks for recommendation systems.
  • You have already deployed machine learning models to production yourself and you know how to monitor them.
  • You have a strong knowledge of Python, R, Scala, Julia or similar typical programming languages for Data Science and have experience writing production-ready code in it
  • You have experience drilling into large amounts of data coming from various sources – including AWS Athena, Kafka, Spark, Flink, S3, MySQL.
  • You are able to dive deep into mathematical foundations and explain complex topics in a simple way.
  • You are a strong team player and enjoy helping others.
  • Generating new ideas and solutions to problems, even unconventional ones, is something that brings you joy and that’s easy for you.
  • Plus: Experiences in deep cross networks and multi-task deep learning.
  • Plus: You have hands-on experience working with common Data Science / Machine Learning tools in production, for example TensorFlow, TensorFlow Serving, Airflow, Flink, Kafka, Terraform or other tools from our Tech Stack.


Heard of Our Perks?
  • Work-Life Package: 2 remote days per week, 30 vacation days, 3 weeks per year of remote work, flexible working hours, dog-friendly kick-ass office in the center of the city.
  • Relocation Package: Visa & legal support, relocation bonus, reimbursement of German Classes costs and more.
  • Happy Belly Package: Monthly company lunch, tons of free snacks and drinks, free breakfast & fresh delicious pastries every Monday
  • Physical & Mental Health Package: In-house gym with personal trainer, various classes like Yoga with expert teachers.
  • Activity Package: Regular team and company events, hackathons.
  • Education Package: Opportunities to boost your professional development with courses and trainings directly connected to your career goals 
  • Wealth building: virtual stock options for all our regular employees.


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What You Should Know About Machine Learning Engineer (f/m/d), AppLike Group

Are you ready to take on the exciting challenge of a Machine Learning Engineer at adjoe in vibrant Hamburg? At adjoe, we’re on a mission to revolutionize mobile advertising and monetization solutions that propel our app partners to new heights. As part of the applike group ecosystem, we’re backed by robust financial support from Bertelsmann, allowing us to push the boundaries of technology with a dynamic team. In the WAVE Data Science team, you’ll have the opportunity to build and refine innovative algorithms that compete in real-time auctions against industry titans like Google and Meta. Your day-to-day responsibilities will include deploying bidding algorithms and crafting sophisticated recommendation systems to enhance user experience. You’ll collaborate with product teams to bring your ideas to life and use cutting-edge technology to analyze user behavior. If you have a passion for data-driven solutions and enjoy exploring deep learning and neural network architectures, we want you! With over two years of experience in Data Science and proficiency in tools like TensorFlow and PyTorch, you'll find adjoe a fantastic environment to further your skills. Embrace our perks, including a flexible work-life balance, a supportive relocation package, and plenty of opportunities for professional growth. Let's shape the future of mobile advertising together at adjoe!

Frequently Asked Questions (FAQs) for Machine Learning Engineer (f/m/d) Role at AppLike Group
What does a Machine Learning Engineer do at adjoe?

A Machine Learning Engineer at adjoe plays a pivotal role in developing algorithms and models that optimize ad bidding and enhance user experience. This involves deep learning, recommendation systems, and hands-on experimentation with data-driven decision-making.

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What qualifications do I need to apply for the Machine Learning Engineer position at adjoe?

To apply for the Machine Learning Engineer position at adjoe, candidates should have at least 2 years of experience in Data Science, proficiency in programming languages like Python or R, and familiarity with deep learning frameworks such as TensorFlow or PyTorch.

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How does adjoe support the professional development of Machine Learning Engineers?

At adjoe, we prioritize professional development through our Education Package, which offers training courses directly aligned with your career goals, ensuring that our Machine Learning Engineers stay competitive and knowledgeable in their field.

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What is the WAVE Data Science team like at adjoe?

The WAVE Data Science team at adjoe is a collaborative and innovative group dedicated to creating cutting-edge advertising solutions. Team members share their expertise and work closely together to shape the future of adjoe's technology and algorithms.

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Do Machine Learning Engineers at adjoe work remotely?

Yes! Machine Learning Engineers at adjoe benefit from a flexible work-life package that includes 2 remote days a week and the option to spend 3 weeks per year working remotely, promoting a comfortable work environment.

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What programming languages should I know for the Machine Learning Engineer role at adjoe?

Candidates applying for the Machine Learning Engineer position at adjoe should have strong knowledge in Python, R, Scala, or Julia, as these are the typical languages used in Data Science projects within the company.

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What kind of projects can a Machine Learning Engineer expect to work on at adjoe?

As a Machine Learning Engineer at adjoe, you'll work on a variety of projects focused on developing and deploying algorithms for bidding processes, creating recommendation systems, and analyzing user data to enhance monetization strategies.

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Common Interview Questions for Machine Learning Engineer (f/m/d)
Can you explain the difference between supervised and unsupervised learning?

Supervised learning involves training a model on labeled data, meaning each input is paired with an output. In contrast, unsupervised learning deals with unlabeled data, where the model tries to find patterns and relationships without explicit instructions. It’s important to highlight your understanding of both when discussing topics during the interview.

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What experience do you have with deploying machine learning models to production?

When discussing your experience deploying machine learning models to production, focus on specific projects where you've successfully transitioned models from development to production, including any challenges encountered and how you monitored performance after deployment.

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How do you handle overfitting in machine learning models?

To address overfitting, consider strategies such as cross-validation, regularization techniques, and reducing feature complexity. Provide specific examples from your experience where you successfully mitigated overfitting in a model.

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Can you describe a challenging data problem you've resolved?

Discuss a data problem where you faced difficulties in data preparation, model selection, or optimization. Explain the methodologies you used to overcome these challenges, demonstrating your problem-solving skills and analytical thinking.

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What techniques do you use for feature selection?

Discuss using techniques like Recursive Feature Elimination (RFE), correlation matrices, or regularization methods such as LASSO to select the most relevant features for your model. Emphasize the importance of feature selection in improving model accuracy and performance.

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What role do you believe data cleaning plays in machine learning?

Data cleaning is crucial as it ensures the data fed into the model is accurate, complete, and relevant. Talk about your experience in identifying and rectifying inconsistencies in datasets, which ultimately leads to higher prediction accuracy.

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How do you stay current with advancements in machine learning?

Mention your commitment to continuous learning through attending workshops, following thought leaders, reading research papers, and participating in online courses. Share specific examples of how these resources have influenced your work.

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Can you explain the concept of neural network architectures?

Provide a clear explanation of basic neural networks, including input, hidden, and output layers. Discuss different architectures like CNNs, RNNs, and their applications, showcasing your knowledge of deep learning as a Machine Learning Engineer.

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Describe your experience with specific machine learning libraries like TensorFlow or PyTorch.

Talk about projects where you utilized libraries like TensorFlow or PyTorch for building and training models. Highlight any unique implementations, challenges faced, and how these tools enhanced your ability to develop effective machine learning solutions.

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What is a recommendation system and how does it work?

A recommendation system identifies and suggests items to users based on their preferences and behavior. Discuss collaborative filtering, content-based filtering, and hybrid approaches, showcasing how this knowledge will contribute to your success as a Machine Learning Engineer at adjoe.

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Full-time, hybrid
DATE POSTED
November 29, 2024

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