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 applications

What we offer

• Payment in USD
• A 3-month contract that can be extended based on performance