Working Student (m/f/d) – Java Platform Modernization

Job description

Company Description Since its creation in 2007 in the financial city of Frankfurt am Main, Solactive AG has grown to one of the key players in the indexing space. The German multi-asset index provider focusses on tailor-made indices, offering to its clients a faster service, with greater flexibility and at a reasonable cost. Solactive AG and its subsidiaries have become one of the fastest growing index providers over the past few years and support the leading investment banks and asset managers across the globe. We have gained global recognition for our role in the Exchange Traded Fund (ETF) industry, where we rank among the top providers worldwide for underlying indices. We also excel in diverse areas such as Structured Products and investment mandates, showcasing the wide range of our capabilities. The impact and value we bring to the market is palpable, but also in the reputation we have proudly built by being close to our customers, solidifying Solactive AG as a trusted and reliable ally in the ever-evolving global financial landscape. Job Overview Join us in modernizing our core indexing platform a business-critical system built on a robust Java-based microservices architecture. From day one, you will actively contribute to strengthening the technical foundation of the large-scale production system. Your Tasks Supporting the modernization of our Java microservices stack. Reducing and consolidating dependencies to keep the platform lean and maintainable. Evaluating and replacing outdated libraries with better alternatives. Improving Maven dependency management and build hygiene. Contributing to code quality and test coverage. Working closely with experienced engineers on architectural and refactoring topics. Your Profile Enrolled student at a university (this is Berlin-based working student position). Solid Java programming fundamentals. Basic knowledge of unit testing (JUnit, Mockito). Familiarity with Git version control. Ability to read and understand technical documentation. Structured and careful working style. Our Offer Be part of the Solactive family — an international FinTech environment with flat hierarchies, real ownership, and strong growth opportunities. Enjoy attractive benefits such as team events, Corporate Benefits access, a modern ergonomic office, free beverages and fruit, and a monthly internship remuneration. Work on a real, high-impact production platform and contribute to architectural improvements — not just feature tickets. Gain hands-on experience with Java microservices, build systems, and dependency governance while collaborating with experienced engineers. Build practical backend engineering skills that directly support your long-term career development.