Working Student (m/f/d)Indexing Platform in Berlin

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.

Solactive's Aggregate team owns the intraday calculation of our indices: consuming live price streams, applying calculation logic across a wide range of indices, and producing a continuous output stream of index ticks throughout the trading day. The core platform is built in Java and engineered around throughput, latency, and correctness under concurrency, while custom business integrations are built in Python. As a Working Student you join a small team and contribute real, production-bound code to both, working alongside senior engineers who review your work and coach you.

• Implement well-scoped features and fixes in the Java calculation platform, such as improvements to calculation components, price stream consumption, or index tick production
• Write unit, integration, and performance tests, including tests for concurrent code paths where ordering and timing matter
• Help investigate correctness or performance issues: reproduce them, narrow them down, and propose fixes with senior guidance
• Build and maintain Python integrations for business teams: connectors to the calculation platform, output adapters, validation checks, and small operational tools
• Contribute to monitoring and developer tooling that makes calculation behaviour observable and easier to reason about
• Take part in design and code reviews, ask questions, and document what you learn so the next person can pick it up faster

• Enrolled student in computer science, software engineering, or a closely related field
• Strong Java fundamentals: object-oriented design, collections, generics, and comfort reading and writing idiomatic modern Java
• Solid grounding in core computer science: data structures, algorithms, and complexity, and in particular a working understanding of multithreading and concurrency (threads, synchronisation, memory visibility, races and deadlocks)
• Openness to Python: no prior experience needed, but willingness to pick it up for integration and tooling work alongside Java
• Familiarity with Git, the command line, and a testing mindset; interest in measuring performance rather than guessing at it
• Ability to work independently on a scoped task, ask for help early when stuck, and communicate clearly in writing
• Available for 15–20 hours per week during the semester, more during semester breaks
• Interest in financial markets, market data, or index calculation is welcome but not required

• 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.
• 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.

This role sounds like you? Then we look forward to receiving your application. Please make sure to also upload your CV, a cover letter is not compulsory. If you have any futher questions just drop us an email! Sonia Urusaro - careers@solactive.com

Please Note
No artificial intelligence (AI) is used in the screening, assessment, or selection of candidates for this position.
Solactive does not charge candidates any fees at any stage of the recruitment process and will never request payment for CV enhancement, interviews, training, equipment, or other recruitment-related services. Please be cautious of fake profiles or fraudulent messages claiming to represent Solactive. If you are unsure whether a communication is legitimate, contact us at careers@solactive.com
Solactive does not accept unsolicited CVs or candidate profiles from recruitment agencies. Any cooperation request must be addressed directly to People & Culture. Costs related to unsolicited CVs or candidate profiles will not be covered by Solactive.