Full-Stack Software Engineer

Software Developer

Munich / Bavaria / Germany

Hybrid & Remote Full Time

65.000 - 100.000

English C1 German C1

Develop and maintain a complex banking desktop application using C/C#/.NET Python APIs and hardware integration with a focus on real-time multi-threaded operations and secure banking protocols.

Language Requirements: English C1 German C1

We are seeking an experienced desktop software engineer to join our enterprise banking software team. You will design develop and maintain a multi-language client-server desktop application with emphasis on hardware integration banking protocols and robust mission-critical operations.

• Develop and maintain a complex C/C#/.NET desktop client-server application for banking operations
• Build Python API layers including REST and XML-RPC interfaces for banking integrations
• Create Python device handlers for hardware abstraction (cash dispensers printers card readers check readers signature pads)
• Work with Windows systems programming (COM/DCOM Registry) and Win32 APIs for the core C/C# client
• Develop integrations with banking core systems using XML-RPC SOAP and custom socket protocols
• Implement high-level (PHLAPI) and low-level (PLLAPI) banking APIs for transaction processing in Python
• Create real-time monitoring dashboards using Express and React
• Work with SQL Server and PostgreSQL databases for transaction management and reporting
• Ensure compliance with banking protocols and security standards
• Develop multi-threaded event-driven systems for asynchronous device operations
• Support multiple hardware vendors

• Strong experience in API development and device integration (REST APIs XML-RPC hardware drivers)
• Experience with C and/or C#/.NET development for Windows desktop applications
• Experience with multi-threaded programming and asynchronous patterns
• Knowledge of SQL Server or PostgreSQL database design and optimisation
• Strong systems-programming skills and debugging expertise
• Proactive mindset eager to work on complex mission-critical systems
• Strong English fluency
• Experience with Python (plus)
• Understanding of Windows desktop application development (Win32 API) (valuable)
• Familiarity with device-driver development or hardware communication protocols (highly valuable)
• Understanding of plugin architectures and design patterns (Factory Observer Command)
• Experience with for web services (plus)
• Knowledge of banking systems XFS or payment-terminal integration (plus)

• Competitive salary
• 30 vacation days per year
• Flexible working hours
• Hybrid work options available
• Opportunity to work on mature enterprise-level banking software
• Exposure to sophisticated systems programming and hardware integration challenges
• International team collaboration across multiple time zones

• Required Experience: Minimum 3 years of professional experience
• Employment Type: Full-time