1&1 Mail & Media Applications SE

Java Developer (f/m/d)

at subsidary 1&1 Mail & Media Applications SE in Karlsruhe
Full-time | Permanent | Professionals
Reference ID: 3794


About us

With our strong brands GMX, WEB.DE and mail.com and over 42 million active users, we are the leading email and communications platform in Germany, Austria and Switzerland. From this strong market position, services and apps are developed that simplify users' digital lives - from office tools and cloud solutions to personal ID management.

Your Tasks

Your passion is Java and you’re keen on working with Big Data? You love a modern tech stack as well as a great team? Then we are looking for you! We are developing an internal analytics toolset for product management and sales in close cooperation with the responsible business intelligence teams. The platform meets the requirements of modern business users for analyses and reports on large data sets with billions of events from our portals GMX, WEB.DE and mail.com. To be state of the art we are constantly developing new features and modernizing our platform using Java Spring, Kubernetes, Hadoop, Impala, Kafka and other Big Data technologies. Exciting responsibilities and opportunities await you.

We offer a pleasant work environment with cross-functional teams and flat hierarchies - fully geared towards the fast, unbureaucratic delivery of new software features. In our team:

  • You design, develop and test new functionalities for our analytics and data integration platform.
  • You scale and optimize the platform for more data.
  • You review data pipelines submitted by platform users and ensure that the platform is being used in line with our strategy.
  • You are part of a dynamic data unit, constantly working with several teams to develop your ideas as well as learn from others and grow together.

We Appreciate

Do you have several years’ experience as a software developer or in a comparable role in the data business? Are you interested in creating a fundamental platform for many users to integrate, aggregate, and analyse data together with a great team? You’re keen on learning new stuff? Your working style is hands-on? Then we’re looking forward to your application!

  • You have several years of experience with Java Spring and tools like Maven, Docker, Gitlab or Jenkins.
  • You’re familiar with Big Data ecosystem like Hadoop, Kafka, Impala or Trino.
  • You like collaborating with a team to achieve common goals.
  • You have strong technical problem-solving skills with a keen eye to improve upon current processes and you love to take ownership of tasks and assignments.
  • You have strong verbal and written communication skills in English and German.

What else we would like to tell you

  • Our corporate culture: „You“ culture and no dress code, flat hierarchies, open and transparent communication
  • Individual development opportunities: diverse training courses, e-learning and internal communities, language courses, mentoring
  • Events: Slack Days, open source projects, meet-ups
  • Relocation service: support with the relocation to Germany
  • Benefits and additional services: company pension scheme, capital-forming benefits, discounts on own products, job ticket, bike leasing, corporate benefits portal
  • Attractive working conditions: 30 days holiday, hybrid working 2 days home office/week or remote work, full-time and part-time arrangements, free choice between Linux, Mac or Windows
  • Social: team events, summer and winter parties, family and care service, sports and fitness programmes, subsidised canteen, free fruit and drinks, health courses
  • Topics that are also important to us: Sustainability, diversity and our values and leadership principles - find out more on our website mail-and-media.com

apply online now

We value diversity and welcome all applications - regardless of, for example, gender, nationality, ethnic or social origin, religion, disability, age as well as sexual orientation and identity, physical characteristics, marital status or any other irrelevant factor subject to applicable law.


1&1 Mail & Media Applications SE
Recruiting & Candidate Management

Brauerstraße 48
D-76135 Karlsruhe