With over 4 million domains and more than 2 million customers, we, as an IONOS company, are among the largest web hosting providers worldwide. We operate two TÜV-certified data centers with over 70,000 servers. Our products are diverse and form the backbone of our success, but they only come to life through our amazing employees.
The Mission: Your goal is to design a testing architecture that can keep up with an AI-augmented development team while ensuring the "Source of Truth" in collaborative documents is never corrupted.
Tasks- The Validation Blueprint: Design the strategy for testing real-time synchronization (CRDT/OT) and "Semantic Merges." You define how we simulate large numbers of concurrent users editing a single document.
- Visual Regression Architecture: Establish the framework for "Pixel-Perfect" testing of the Canvas-based rendering engine. You ensure that a performance tweak doesn't accidentally move a spreadsheet border by 1 pixel.
- Performance Benchmarking: Build the "Continuous Profiling" pipeline. You define the thresholds for our 16ms frame budget and ensure the CI/CD pipeline fails if a PR introduces "jank."
- AI Strategy: Define the Test-Driven Prompting (TDP) standards for the team. You ensure the AI-generated tests are meaningful and cover edge cases in the C++/JS bridge.
- Expertise in systems-architecture
- Deep understanding of distributed systems and how to test for race conditions and "eventual consistency."
- Experience in Game QA Automation or FinTech (where state accuracy is life-or-death).
- Hybrid working model.
- 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.
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.
Skills Required
- Expertise in systems-architecture
- Deep understanding of distributed systems
- Experience in Game QA Automation or FinTech
What We Do
STRATO is the reliable web hosting provider for everyone who wants to be successful online. The company's claim: Fair and simple hosting – at the best price and without unnecessary frills. The product portfolio includes domains, email, websites and servers as well as online marketing tools and Germany's largest cloud storage HiDrive. In addition to the extensive range of products, customers benefit from flexible contract periods, a 30-day money-back guarantee, and award-winning customer service. Established in 1997 in Berlin, STRATO is now one of Europe's largest web hosting providers with over four million domains and more than two million customer contracts. Home to around 500 employees, STRATO operates two TÜV-certified data centers with over 100,000 physical and virtual servers in Berlin and Karlsruhe. STRATO has been climate-neutral since 2021, being one of the first companies in the hosting industry that have achieved this goal. STRATO is part of the listed IONOS Group SE.








