ppWe are looking for a Junior .NET Engineer to join a payment technology project in Madrid. /p /brpYou 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. /p /brpThis role is idóneo 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. /p /brpLicensed 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. /p /brpbThe role is on-site in Madrid (remote trial period is possible).



/b /p /brh3YOUR BACKGROUND /h3 /brul /brli3+ years of experience in Information Technology /li /brliBasic commercial or practical development experience with .NET and C# /li /brliHands-on experience working with REST APIs and JSON /li /brliAbility to read code and understand request-and-response flows /li /brliAdditional languages - Ukrainian/Polish/French /li /br /ul /brh3Skills that will be a plus: /h3 /brul /brliExperience in fintech, payments, or banking infrastructure /li /brliFamiliarity with webhooks, API authentication (OAuth, API keys), and Postman or similar tools /li /br /ul /brh3RESPONSIBILITIES /h3 /brul /brliOnboard new third-party partners onto API platform, from first call to go-live /li /brliSupport partner integrations end to end: configuration, testing, and troubleshooting /li /brliAct as the technical point of contact for partners, diagnosing issues across API requests, JSON payloads, and webhooks /li /brliReproduce, investigate, and resolve integration bugs - escalating to engineering when needed /li /brliWrite and maintain clear integration documentation, examples, and troubleshooting guides /li /brliFeed recurring partner pain points back to product and engineering to improve the platform /li /br /ul /brh3WE OFFER /h3 /brul /brliA competitive, market-aligned salary /li /brliProfessional growth opportunities within a fast-growing international company /li /brliA collaborative and dynamic environment with direct impact in the fight against financial crime /li /brliAccess to innovative technologies and regulatory practices /li /brliA clear path for career progression with increasing responsibilities /li /br /ul /p #J-18808-Ljbffr

📌 Junior.NET Engineer in Madrid (required Ukrainian/Polish language)
🏢 DashDevs
📍 Madrid