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Beschreibung

Details: B2B Contract , up to 12 months + possible extensions Location : Warsaw, Poland Work model: 2-3 days in the office, 2 days remotely We are looking for an experienced Senior .NET Developer to take ownership of a business-critical enterprise integration platform responsible for consolidating shipment, status event and customs declaration data from multiple transport management systems. The role combines backend development, batch processing, SQL Server optimisation, enterprise integrations and production support , with an additional opportunity to contribute to the future modernisation of an established .NET Framework solution. Your responsibilities Maintaining and extending an established C# / .NET Framework 4.x Windows Service . Supporting multi-threaded, timer-driven import and export processing. Investigating and resolving production issues across application and data layers. Developing and optimising SQL Server / T-SQL solutions. Maintaining stored procedures and Dapper-based repositories. Analysing and resolving locking, deadlock and performance issues. Maintaining mappings between enterprise canonical data models. Working with shipment, status event, milestone and customs declaration data. Maintaining WCF / SOAP integrations , service references, bindings and endpoints. Working with XML serialisation, XSD schemas and XSLT mappings. Providing 2nd and 3rd level production support . Reprocessing and correcting data when required. Working closely with business, opera

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