C++ Backend Developer (f/m/d) - onsite or remote / home office

1&1 Mail & Media Applications SE | IT Software Development | Karlsruhe / Nationwide (Germany) / Work from home | Permanent | Full-time | Young professionals / Experienced professionals | Reference ID: 4308

  • Tasks that ignite your passion

    Are you passionate about Software Development, particularly in modern C++? Do you thrive on creating high-quality software and staying at the forefront of cutting-edge technologies? If you prefer working in a dynamic, cross-functional, agile team environment, then we're excited to welcome you aboard. Join us at WEB.DE and GMX, Germany´s leading email providers, as we continue to innovate and enhance our email platform to simplify the lives of millions of users.

    • Develop and maintain robust C++ services for our mail store platform, deployable on both dedicated hardware and our in-house Kubernetes clusters.
    • Drive the implementation of new features across all systems for automated email processing, engaging from conception to final release.
    • Spearhead architecture spikes and proofs of concept for complex or high-risk systems, while evaluating and integrating new technologies.
    • Collaborate closely with diverse teams including QA, spam experts, architects, and operations, contributing ideas and expertise autonomously.
    • Stay abreast of emerging technologies and actively participate in internal and external conferences.

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 qualification? Are you interested in becoming part of an agile web development team? Are you passionate about software development and high-quality code? You are a real team player and your work attitude is "hands-on"? Do you see yourself described in the points below? Then we look forward to receiving your application.

    • Solid expertise in object-oriented programming with modern C++, including proficiency in STL and Boost. Familiarity with web technologies like JSON and RESTful HTTP is essential.
    • Proven experience with Linux as a development and server environment for high-load systems, along with adeptness in managing distributed systems.
    • Proficiency in containerized services on cloud platforms. Ideally, familiarity with IETF RFC Mail Standards.
    • Strong understanding of automated software quality assurance practices (Unit Testing, Performance Tests, Continuous Deployment/Delivery) within an agile development framework.
    • A self-motivated, communicative, and adaptable team player who thrives on innovation and collaboration. Proficiency in both German and English is a plus.
  • 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 mail-and-media.com

We are brand. With GMX, WEB.DE and mail.com 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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