We’re a highly specialized consulting company focused on modern frontend architecture, React engineering, and internationalization. With over two decades of hands-on experience building complex web platforms, we partner with organizations on long-term projects where we can create real, lasting impact.

Our work goes far beyond shipping features. We help teams modernize large codebases, design scalable architectures, and build high-performance, multilingual applications that are ready to grow. From deep refactoring and performance tuning to setting up state-of-the-art toolchains and monorepos, we create the technical foundations that enable teams to move faster with confidence.

Our track record spans energy, mobility, e-commerce, industrial IoT, healthcare, media, and supply chain—often serving as lead engineers, architects, or interim frontend leads. We’re experts in React, TypeScript, GraphQL, internationalization, design systems, and high-performance UI engineering, especially in challenging environments.

What sets us apart is our mindset: we integrate seamlessly with your team, elevate engineering culture, and leave behind systems and processes that stand the test of time. We don’t produce slide decks—we deliver outcomes. We raise the bar for code quality, developer experience, and long-term maintainability.
For companies looking to modernize their frontend landscape, scale their platform, or bring their product into new markets, we are the partner that accelerates progress and makes great engineering happen.

Sebastian Software GmbH

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Sebastian Software GmbH

Org chart

Teams

Offices

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