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Conversion Optimization Manager (f/m/d)

At IONOS, the leading European provider of cloud infrastructure, cloud services and hosting services, you will work together with a wide range of teams. We are characterized by open structures, a friendly working culture and flat hierarchies with a strong team spirit. We firmly believe that work and fun are compatible, and offer you the right environment for this. Our constant growth means that we are always looking for new colleagues. Become part of IONOS and grow with us.

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Our team designs and develops the international online platform for the sale of our hosting and cloud products. You will have the opportunity to work in an international and agile environment. As Lead Conversion Optimization Manager, you will play a key role in translating our vision of frictionless user experience into conversions. Your responsibilities will include: 

  • Independently managing your optimization projects, monitoring relevant KPIs and creating reports.
  • Planning, conception and implementation of A/B tests, their evaluation (e.g. with Adobe Target and Analytics) and presentation of results for hypothesis validation.
  • Derivation of recommendations for action and creation of optimization concepts.
  • Forming hypotheses to identify further optimization ideas based on ongoing analysis of website data, user research and customer feedback.
  • Sharing insights and learnings in the UX and CRO team and throughout the company, as well as advising stakeholders on optimization projects.


You work closely in a team with UX designers, developers and stakeholders from other areas. You are driven to actively shape and continuously optimize the best possible user experience in the area of conflict between people and business. Your team supports you in working in an interdisciplinary and agile environment. Your actions will be guided by the values defined in our department: Customer Centricity, Ownership, Mastership, Empowerment, Fearlessness, Transparency, Honesty and Respect. What you can offer:

  • Relevant practical experience in conversion optimization, A/B testing and web analytics.
  • Analytical thinking and confident use of analytics and testing tools from Adobe and Google
  • Experience in creating test strategies, hypotheses and implementing test plans
  • Empathy for users for the qualitative evaluation of the user experience, experience with common user research tools and methods (e.g. mouseflow, heatmaps, usability tests).
  • Experience in user experience design and a feel for the psychological aspects of conversion optimization, basic knowledge and experience in HTML/CSS/Javascript is an advantage.
  • Strong communication and presentation skills and business fluent in English.


  • Hybrid working model with home office option.
  • Flexible working hours through trust-based working hours.
  • At some locations a subsidized canteen 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.

Job info

Location: Berlin
Type: Full-time
Category: (Online-) Marketing
Work experience: Professionals
Reference ID: 84


IONOS is the leading European digitalization partner for small and medium-sized businesses (SMB). The company serves around six million customers and operates across 18 markets in Europe and North America, with its services being accessible worldwide. With its Web Presence & Productivity portfolio, IONOS acts as a 'one-stop shop' for all digitalization needs: from domains and web hosting to classic website builders and do-it-yourself solutions, from e-commerce to online marketing tools. In addition, the company offers Cloud Solutions to enterprises who are looking to move to the cloud as their businesses evolve. 

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.

Recruiting Team IONOS
Hinterm Hauptbahnhof 3-5
D-76135 Karlsruhe