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# NET Engineer

- **Company:** Comunidad de Madrid
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** .NET Framework, Application Programming Interfaces (APIs), C Sharp (Programming Language), Payment Systems, JSON, OAuth, Payment Service Provider, Systems Integration, Postman, Restful APIs, Webhooks, Api Management
- **Published:** August 5, 2026
- **Apply:** https://www.jobleads.com/es/job/e24d871ccce3bd9e9e4fad0dafece82a2

## About the Role

* 3+ years of experience in Information Technology
 * Basic commercial or practical development experience with .NET and C#
 * Hands-on experience working with REST APIs and JSON
 * Ability to read code and understand request-and-response flows
 * Additional languages - Ukrainian/Polish/French

Skills that will be a plus:

 * Experience in fintech, payments, or banking infrastructure
 * Familiarity with webhooks, API authentication (OAuth, API keys), and Postman or similar tools

## Description

You will work at the intersection of engineering and partner success, supporting third-party partners throughout the full API integration lifecycle - from initial onboarding and configuration to testing, troubleshooting, and production launch.

This role is ideal for a junior engineer who enjoys solving real integration challenges, communicating with external partners, and gaining hands-on experience with payment systems. You will investigate API requests, JSON payloads, webhooks, and integration issues while working closely with Product and Engineering teams.

Licensed remittance and payment services provider focused on enabling fast, secure, and compliant money transfers. They operate within the fintech domain, serving international remittance corridors and integrating with multiple partners and financial institutions., * Onboard new third-party partners onto API platform, from first call to go-live

 * Support partner integrations end to end: configuration, testing, and troubleshooting
 * Act as the technical point of contact for partners, diagnosing issues across API requests, JSON payloads, and webhooks
 * Reproduce, investigate, and resolve integration bugs - escalating to engineering when needed
 * Write and maintain clear integration documentation, examples, and troubleshooting guides
 * Feed recurring partner pain points back to product and engineering to improve the platform


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