Java Backend Developer - Applied Machine Learning (f/m/d)

  1. Careers
  2. Java Backend Developer - Applied Machine Learning (f/m/d)
Holidu is one of the fastest-growing travel tech companies worldwide. With more than $100M in funding to date and an international team of travel and technology enthusiasts, our mission is to finally make the search and booking of vacation rentals easy. With our search engine for vacation rentals Holidu we help travelers book the ideal accommodation for the lowest price, and through our software-and-service solution Bookiply we also support vacation rental owners in multiplying their bookings with less work. Do you want to have an impact on millions of travelers worldwide? Then pack your bag, hop on board and get ready for takeoff!

Your future team

You will be part of the backend development team in the search department, which is fully responsible for building a scalable search engine that can serve 100 Million users each month, by applying a microservice approach using Java 11, K8S, Elasticsearch 7, Redis and AWS with response time < 300ms.
You will have the opportunity to bring your unique backend perspective to a team of data scientists in order to find, test and bring live the best suited and most reliable ML models for Holidu.
In addition you will own the feature development and architecture of our search engine and the related microservices with your fellow backend developers in the search department.

Our Tech Stack

  • We are writing the Search Engine and other applications with a microservice approach, using  Java 11, with Spring Boot, running on Kubernetes
  • Data storage with Elasticsearch 7, PostgreSQL, Kafka, MongoDB, Redis
  • Heavy usage of AWS, Kubernetes, Docker, Jenkins, Git
  • Web-Application and internal applications written with ReactJS
  • Native iOS and Android Apps written with Swift and Kotlin
  • Monitoring with ELK, Grafana and internally developed technologies
  • Unit tests written in Kotlin
  • Most of the Machine Learning pipelines involve Python, TensorFlow and VowpalWabbit

Your role in this journey

  • You will be part of the team which is fully responsible for our search engine and all related technologies as well as for the ranking of properties on our website and the deployment of ML models into production.
  • You will develop new features that will be used by millions of users.
  • You will have a lot of freedom to implement your own ideas on how to improve and develop our products further.
  • You will build, with your team, highly scalable applications with state of the art technologies.
  • You will work in a squad based organization alongside other Backend Developers, Frontend Developers, Designers and Product Managers. Together you are responsible for delivering the greatest possible product that offers the best possible experience to our customers.

Your backpack is filled with

  • A degree in Computer Science, or a related field
  • You have professional development experience in Java, after or during your studies
  • Ideally you have worked or you have the strong motivation to work with AWS, Elasticsearch, microservices, Kubernetes and the rest of our tech stack.
  • Ideally you have experience with deploying custom ML models.
  • You should love coding and building world class products! We do and we hope you share our ambition!

Our adventure includes

  • Have an impact on the millions of people using our product every month.
  • Grow with responsibility from day 1 and develop yourself through regular feedback.
  • Connect and have fun with diverse yet like-minded people at work, regular events and weekly office days with your team.
  • Get to know the world with our flexible home office policy and the opportunity to work from other local offices. 
  • Learn languages with meetings in English and subsidised German classes.
  • Get in shape with a premium gym membership for a discounted rate.
  • Go travelling for 28 vacation days + 13 public holidays in Bavaria.
  • Get a sneak peek at the adventure that awaits you on Instagram @lifeatholidu.

Want to travel with us?

Your first travel contact will be Sarah from HR.

We champion diversity in every aspect of life. We encourage applications from all genders, corners of the world and individual backgrounds. Please feel welcome to submit your application without a photo and details on your gender, date of birth, marital status and nationality. If you have a disability or special need that requires accommodation, please let us know.


Munich, Germany

Go back to career page