Programming & Development Programming & Software

API Integration & Connectivity

$85/hr Starting at $750

I connect your business systems to payment processors, shipping providers, e-mail services, and external data sources through clean, reliable API integrations. Work includes designing the integration architecture, handling authentication, error management, and data mapping. Integrations are documented and built to be maintainable long-term — not black boxes that only I can touch. Suitable for businesses that need their tools talking to each other without rebuilding everything from scratch. Category: Programming & Development

About

$85/hr Ongoing

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I connect your business systems to payment processors, shipping providers, e-mail services, and external data sources through clean, reliable API integrations. Work includes designing the integration architecture, handling authentication, error management, and data mapping. Integrations are documented and built to be maintainable long-term — not black boxes that only I can touch. Suitable for businesses that need their tools talking to each other without rebuilding everything from scratch. Category: Programming & Development

Skills & Expertise

APIAPI DevelopmentAutomation EngineeringData ManagementData MappingJSONXML

3 Reviews

Mia 137 says,

Rene was amazing to work with! He is extremely knowledgeable in Filemaker Pro! He helped us with some pretty complicated issues and he mastered them! And it didn't take him a long time at all. I will definitely hire him again!

for Filemaker Pro on May 09, 2025
Amy 434 says,

Very professional and thorough.

for FileMaker Developer on Dec 20, 2022
Jim 314 says,

I'm very happy I selected Rene to create my Filemaker database. He is was extremely knowledgable and great to work with. I highly recommend him to anyone with a Filemaker project.

for Filemaker Database on Mar 14, 2017

Rene Kropf