Senior Java Developer – Microservices, Spring Boot (f/m/d)

1&1 Mail & Media Applications SE | IT Software Development | Karlsruhe / Munich | Permanent | Full-time | Experienced professionals | Reference ID: 4340

  • Tasks that ignite your passion

    Your passion: Java backend development with microservices and Spring Boot? Do you expect: flat hierarchies, a cross-functional Scrum team and a news product that you can really help shape and that we have big plans for? Then we are looking for you! Help us to make one of the largest German news portals with over 18 million users even more attractive using AI and become part of our team.

    • You develop sophisticated features and services based on current Java 21 technologies for our news portal and internal microservices.
    • You identify potentials for optimization in terms of quality, performance and maintainability.
    • You tackle complex problems or high-risk systems using architectural spikes and proof of concepts.
    • You test your code supported by our continuous integration and delivery setup with high degree of automation and by this receive quick feedback on whether your code lives up to its promises or breaks the pipeline.
    • You pick up current trends and technologies and share your knowledge with your colleagues in regular brown bag sessions or slack days.

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 a technical degree such as computer science or a comparable education? You are interested in becoming part of a cross-functional web development team and developing new features for our News Portal and internal microservices as Senior Java Developer using e.g. AI? Your passion is software development and your Code is high quality? You are a born team player and your work attitude is „hands on“? You think the following suits you? Then we are looking forward to your application.

    • You have a good knowledge of Java web technologies and corresponding frameworks (Freemarker, Servlet API, Spring, Spring Boot, Hibernate, ElasticSearch, Solr, Maven) as well as basic knowledge of HTML/CSS and Javascript.
    • You have work experience with Linux as development and server environment for a Tomcat/Apache stack and with Docker and Kubernetes as well as knowledge of dealing with distributed systems.
    • You know how to write “clean code” with good performance and how quality and performance can be tested automatically utilizing tools (Junit 5, Selenium, Jmeter).
    • Ideally you already have experience with CMS, Continuous Delivery, REST, Python and GitLabCI.
    • You like to take on responsibility, like to deal with new topics such as data science, AI, security or DevOps as part of your own development, and a good team spirit is important to you.
  • 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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