Full-Stack Software Engineer

Full-Stack Software Engineer (C/C#/.NET) - ProAKT Platform

Munich / Bavaria / Germany

Hybrid & Remote Full Time

65.000 - 100.000

English C1 German C1

About the Job Posting

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

Job Description

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.

Responsibilities

• 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

Requirements

• 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)

Benefits

• 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

Experience & Employment

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