Senior Java/Kotlin Engineer (Freelancer)

Our vision is simple yet powerful: we want to create a place where engineers thrive, taking on exciting projects and using the latest technologies, free from the shackles of legacy solutions.

Thanks to the diverse range of industries we work with, our days are never boring: from world-class apps to AR solutions or even programming robots, we’ve got it all covered. We don’t just write code for our screens; rather, we develop impactful products used by millions every day: let them be large-scale public transport applications, leading fintech platforms, or storage solutions contributing to a greener future.

We are a team of 100+ engineers (Java, JavaScript, Android, iOS, NodeJS and dotnet platforms) and QA engineers with our coding fingers at the ready working on the next big thing. We value openness, modesty, hard work, and simple yet great solutions.

We’re looking for a Senior Java/Kotlin Freelancer with at least 3 years of Kotlin backend development experience to join a renewable energy trading project. The solution connects asset data and trading operations on a single platform, enabling end-to-end automation across forecasting, trading, and dispatch.

You’ll work with Kotlin and Spring Boot in a full Supercharge project, with design, project management, architecture, and tech leadership provided in-house. The team works in Hungarian, while specifications are in English, and there is no direct client interaction.

The project runs full-time (40 hours/week) for approximately 3 months , with an expected start in mid-November. On-site presence is required once a week at our Budapest office (Czuczor utca 2., 3rd floor), with additional days possible if needed.

You can expect a high-quality engineering environment focused on clean code, modern technologies, a strong team, and a friendly atmosphere.