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Staff Architect (f/m/d) - AI Agent Platform

IONOS SE
Product Management
Karlsruhe
Full-time
I-1557

About IONOS SE

At IONOS, we don't just manage servers – we shape the digital future for more than 6.2 million customers worldwide with our solutions. As Europe's leading hosting provider and a pioneer in independent cloud solutions, we are building next-generation infrastructure – from sovereign cloud architectures and high-performance GPU clusters to integrated AI automation tools. What drives us is digital sovereignty for Europe and real impact for small and medium-sized businesses (SMBs) as well as large enterprises. We work in agile teams, rely on transparent structures, and believe that excellence and innovation only emerge through true team spirit. Ready for your next step? Become part of IONOS and grow with us.

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United Internet Office Building

Tasks

We're launching a brand-new AI Agent platform that will become the digital assistant of choice for small- and medium-businesses (SMBs). This platform features various intelligent, autonomous agents handling tasks from customer interactions — like reservations and support — to strategic initiatives like marketing campaigns and sales. You'll be instrumental in developing the core application that enables these agents to operate, learn, and collaborate, ultimately driving significant value for our customers.

This role involves defining the technology roadmap, architectural standards, and technical direction for a large-scale, distributed system. If you're passionate about applying cutting-edge AI and agentic technologies to solve real-world business challenges, join our motivated team at the forefront of modern product development. The ideal candidate will focus on solving real customer problems by working backwards from the user to the tech stack, while successfully embracing ambiguity as an opportunity in a newly defined space.

  • Design and evolve the architecture for a large-scale, distributed system capable of serving extensive customer bases and processing massive data volumes.
  • Evaluate and select the optimal technology stack, focusing on modern web technologies and AI foundational platforms, including agent workflow platforms and builder frameworks.
  • Define interfaces to enable seamless agent interaction, information sharing, and autonomous action triggering, incorporating necessary Human-in-the-Loop checks.
  • Act as the subject matter expert on system design, providing technical guidance to development teams and ensuring adherence to architectural standards.
  • Partner with various teams across the organization to clarify technical requirements and establish architectural standards and interfaces.
  • Design components for agent knowledge, including strategies for Retrieval-Augmented Generation (RAG) and the use of vector and distributed databases.
  • Continuously research and track advancements in the AI domain, with a specific focus on agentic AI, to maintain a cutting-edge technology stack.

Qualifications

  • 5-8+ years of experience in designing and implementing large-scale distributed systems and high-traffic customer-facing applications.
  • Prior experience in Technology and Software companies, FinTech, E-Commerce, or related fields. Exposure to Cloud Services, SaaS, AI, and Automation is a strong plus.
  • Agentic AI Domain: Deep understanding of modern AI foundational technologies, including expertise in agent workflow platforms and builder frameworks.
  • Distributed Systems Expertise: Strong familiarity with RAG, vector databases, and modern distributed database architectures.
  • Cloud & Deployment: Proficiency with containerization and orchestration (Kubernetes) and experience deploying on major cloud platforms (AWS, GCP, Azure).
  • Technical Acumen: Ability to rapidly evaluate new technologies, articulate trade-offs, and make sound recommendations under uncertainty.
  • Demonstrable, hands-on fluency with state-of-the-art AI models and agentic frameworks as evidenced by projects, prototypes, or published work.
  • Track record of translating ambiguous user needs into concrete, well-reasoned technical architectures in fast-moving product environments.
  • A portfolio of moments where you pushed a project forward and succeeded, despite uncertainty, resource constraints, or stakeholder hesitation.
  • Excellent communication, negotiation, and influencing skills to convey complex technical concepts across diverse teams and seniority levels.
  • Demonstrated ability to lead by example, mentor engineers, and foster a culture of curiosity, ownership, and continuous improvement.

Benefits that make a difference

As an employer, United Internet offers interesting roles with exciting projects, personalized development opportunities and excellent career prospects.

Culture

Our working environment is characterized by flat hierarchies and short decision-making processes. We encourage a positive approach to learning from mistakes and open feedback!

Mobility

To support sustainable and flexible mobility, we provide our employees with attractive benefits packages. For example, through JobRad, you can lease your ideal bike on attractive terms. We also provide a financial subsidy for this offer. Alternatively, you can use public transport and benefit from a subsidy towards the Deutschlandticket.

Events

We celebrate our successes as a team: at United Internet, we throw legendary parties. And our varied workshops and team events foster a special sense of camaraderie.

Flexible Working

Many of our roles allow for remote working from home and flexible working hours.

Pension and health

Our employees benefit from attractive pension schemes. These include modern financial security options that support wealth accumulation. Our health and fitness programmes, covering topics such as ergonomics, exercise and nutrition, round off the package. The aim is to provide a working environment in which all colleagues can not only develop professionally but are also well-positioned for their personal future. 

Discounts

Our employees benefit from a wide range of discounts on our Group’s products and services, for example in the form of discounted broadband and mobile phone contracts. In addition, we offer exclusive price advantages for selected leisure and partner offers.

A wide range of training opportunities

Strengths are individual – and that is a good thing! Our wide range of development programmes offers excellent opportunities for personal and professional growth. From e-learnings to trainings, conferences and mentoring – we learn from, for and with one another to grow together.

Technology

To provide our employees with a productive and comfortable working environment, we rely on state-of-the-art technology. This includes high-performance hardware, ergonomic accessories and the latest software tools for efficient collaboration.

Our benefits in detail

  • Hybrid working model.
  • Flexible working hours through trust-based working hours.
  • A subsidized canteen at Karlsruhe HQ and various free drinks.
  • Modern office space with very good transport connections.
  • Various employee discounts for activities and products.
  • Employee events such as summer and winter parties, as well as workshops.
  • Numerous training and development opportunities.
  • Various health offers, such as sports and health courses.

Join our team

United Internet offers diverse opportunities for people who want to help shape the digital future. Those who want to contribute their strengths and grow in an innovative environment will find the right place with us.

apply online now

Two colleagues in the office
WORK UNITED.
 

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

Contact

Questions?

IONOS SE
Recruiting Team IONOS

Hinterm Hauptbahnhof 3-5
D-76137 Karlsruhe
jobs@ionos.com

Please submit your application exclusively through our easy-to-use online application form. This allows us to ensure a transparent application process while maintaining full compliance with all applicable data protection regulations. Unfortunately, we are unable to accept applications submitted via email for the reasons outlined above.