Jesús Jiménez Alcántara
I build REST APIs and payment systems with ASP.NET Core and Azure. Four years of backend development for mobile apps in production with 3,000+ monthly active users.
APIs & Contracts
Full-cycle REST API design: requirements analysis, use case definition, OpenAPI/Swagger documentation, and production support. I prioritize contract clarity, versioning, and compatibility with mobile clients. I've designed and maintained APIs consumed by 3,000+ monthly active users in production.
Cloud & Architecture
Cloud-native architecture with Azure Functions and ASP.NET Core. I design systems with event-driven async processing using Azure Storage Queues and Worker Services. I evaluate deployment models, serverless vs App Service, analyzing operational cost, scalability, and latency based on each product's requirements.
Security
Security applied from the first commit, not as an afterthought. I implement stateless JWT authentication, endpoint-level RBAC, OAuth 2.0 with Google and Apple, and Redis-backed rate limiting against brute-force and credential-stuffing attacks. Background in SecDevOps in enterprise environments at Ernst & Young.
Payments & Integrations
Full Stripe integration: webhooks, idempotency, and subscription lifecycle management. Native subscriptions with Apple App Store and Google Play including server-side receipt validation. I've built payment systems in production that process real user transactions without incidents.
