Software Developer (.NET)

SEMI SENIOR - Software Developer (.NET) - Payment Integrations Location: Chile or Argentina (remote) Level: Semi Senior Contract: 3 months, with possible extension based on performance Payment: USD About the role We are looking for a Software Developer to join a team working on a payment-focused platform. You will build new features on a modern .NET stack and maintain legacy VB.NET code. A big part of the work is integrating and supporting multiple payment gateways and making those integrations reliable with solid integration testing. What you will do Build and maintain web applications with ASP.NET on .NET 9 or later. Support, refactor and extend legacy C# and VB.NET code. Design, implement and maintain integrations with several payment gateways. Write and maintain integration tests for payment flows and external services. Work with SQL Server 2022 on queries, stored procedures and performance tuning. What we are looking for Commercial experience with ASP.NET on .NET 9+. Hands-on experience with C# and legacy VB.NET codebases. Solid skills with SQL Server, ideally the 2022 version. Proven experience integrating more than one payment gateway. Experience designing and running integration tests. Equipment requirements You will work on your own laptop, which needs to meet these specs: Processor: Intel Core 7, Core Ultra or equivalent (x64 architecture) Memory: 32 GB RAM Operating system: Windows 11 or later Storage: SSD with more than 50 GB free for Visual Studio and the applica