Java Developer - Big Data (f/m/d)

1&1 Mail & Media Applications SE | IT Software Development | Karlsruhe | Permanent | Full-time | Experienced professionals | Reference ID: 3993

  • Tasks that ignite your passion

    Your passion is Java, and you are 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 a data streaming platform for our downstream systems Smart Data Hub Archive and Smart Data Analytics in close cooperation with our partner 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 To be state of the art, we constantly develop new features and modernize our platform using Java, Spring, Kubernetes, Kafka and a set of 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 data integration and data streaming platform.
    • You scale and optimize the platform for more data.
    • You are part of a strong data unit, constantly working with several teams to develop your ideas as well as learn from others and grow together.
    • You can work flexibly, and we value proactivity.

Advantages you enjoy

Lived corporate culture

Transparency, open communication and short decision-making processes

Wide range of further training

E-learning, seminars, conferences and mentoring

Renowned TEC-Campus

Conferences, lecture series, courses, open source projects, community meetings, user groups

Active health care

Sports and fitness classes, lectures, discounts at fitness and health centers, fresh fruit and drinks for free


Generous subsidy for job bike leasing and the job ticket

Flexible working models

Home office, mobile office, flexible working hours, trust-based working time arrangements

Financial benefits

Company pension scheme, discounts on our products and various leisure activities

Legendary events

Summer and winter parties, additional workshops and team events

  • Your qualifications which inspire us

    Do you have several years of 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 analyze data together with a great team? 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 Docker or GitLab.
    • You are interested in the Big Data ecosystem or already familiar with it (especially Apache Kafka) and are not afraid of DevOps.
    • You like collaborating with other teams to achieve common goals.
    • You are keen on learning new stuff.
  • Good to know
    • 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

We are brand. With GMX, WEB.DE and and over 43 million active users, we are the leading email and communication platform in Germany, Austria and Switzerland.

We are future. Our services and apps simplify digital life from cloud storage to news and ID management.

You are at home. Your digital passion finds a professional home with us. Your strength makes us stronger, your expertise complements our ideas, your success becomes visible. Together we shape the digital future.

Diversity enriches. Different cultures, nationalities, genders, age groups, sexual orientations and religions as well as people with disabilities - we desire diversity and encourage it. Because only teams that reflect all facets of society offer the best framework conditions for creativity and make a company productive and distinctive. We value diversity and welcome all applications.

Apply now

We look forward to receiving your application, including your salary expectations and the reference number given above. Please use our online application form. If you have any questions about the position or the application process, please send us an email.

1&1 Mail & Media Applications SE
Recruiting & Candidate Management
Brauerstraße 48
D-76135 Karlsruhe

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