After graduation, you can continue with scientific research and do a PhD, or choose from a plethora of interesting and challenging jobs here is a small selection:
finance and insurance industry 

• finance and asset management
• controlling
• risk management

R&D 

• aerospace technology
• clinical-pharmaceutical research
• mobility industry
• Control and Automation Technology

IT and software industry 

• Systems Analysis
• Software Engineering
• Data Science

telecommunications and logistics 

• navigation and positioning systems
• encryption and data compression methods
• network and timetable optimisation

consulting firms, think tanks or scientific publishers 

• innovation management
• market research
• project development